From: Thomas Pedersen <thomas@adapt-ip.com>
To: backports <backports@vger.kernel.org>
Cc: Hauke Mehrtens <hauke@hauke-m.de>, Luis Chamberlain <mcgrof@kernel.org>
Subject: [PATCH v2 02/15] Squashed 'backport/kconf/' content from commit 98bda615
Date: Fri, 13 May 2022 09:05:10 -0700 [thread overview]
Message-ID: <20220513160523.2944694-3-thomas@adapt-ip.com> (raw)
In-Reply-To: <20220513160523.2944694-1-thomas@adapt-ip.com>
From: Luis Chamberlain <mcgrof@kernel.org>
git-subtree-dir: backport/kconf
git-subtree-split: 98bda6156678fbc1c0930a85950418af81c0a25f
---
backport/kconf/.gitignore | 24 +
backport/kconf/GPL-2.0 | 359 +++++
backport/kconf/Kbuild.include | 73 +
backport/kconf/Makefile | 62 +
backport/kconf/README.kconfig | 13 +
backport/kconf/conf.c | 921 ++++++++++++
backport/kconf/confdata.c | 1262 +++++++++++++++++
backport/kconf/expr.c | 1303 +++++++++++++++++
backport/kconf/expr.h | 326 +++++
backport/kconf/internal.h | 9 +
backport/kconf/kconf_id.c | 52 +
backport/kconf/kconfig.Makefile | 65 +
backport/kconf/kconfig/.gitignore | 16 +
backport/kconf/lexer.l | 468 +++++++
backport/kconf/list.h | 132 ++
backport/kconf/lkc.h | 156 +++
backport/kconf/lkc_proto.h | 52 +
backport/kconf/lxdialog/.gitignore | 4 +
backport/kconf/lxdialog/BIG.FAT.WARNING | 4 +
backport/kconf/lxdialog/checklist.c | 319 +++++
backport/kconf/lxdialog/dialog.h | 238 ++++
backport/kconf/lxdialog/inputbox.c | 289 ++++
| 424 ++++++
backport/kconf/lxdialog/textbox.c | 395 ++++++
backport/kconf/lxdialog/util.c | 700 ++++++++++
backport/kconf/lxdialog/yesno.c | 101 ++
backport/kconf/mconf-cfg.sh | 52 +
backport/kconf/mconf.c | 1037 ++++++++++++++
| 881 ++++++++++++
backport/kconf/nconf-cfg.sh | 50 +
backport/kconf/nconf.c | 1549 +++++++++++++++++++++
backport/kconf/nconf.gui.c | 614 ++++++++
backport/kconf/nconf.h | 83 ++
backport/kconf/parser.y | 716 ++++++++++
backport/kconf/preprocess.c | 574 ++++++++
backport/kconf/setlocalversion | 118 ++
backport/kconf/symbol.c | 1270 +++++++++++++++++
backport/kconf/update-upstream-kconfig.sh | 28 +
backport/kconf/util.c | 129 ++
39 files changed, 14868 insertions(+)
create mode 100644 backport/kconf/.gitignore
create mode 100644 backport/kconf/GPL-2.0
create mode 100644 backport/kconf/Kbuild.include
create mode 100644 backport/kconf/Makefile
create mode 100644 backport/kconf/README.kconfig
create mode 100644 backport/kconf/conf.c
create mode 100644 backport/kconf/confdata.c
create mode 100644 backport/kconf/expr.c
create mode 100644 backport/kconf/expr.h
create mode 100644 backport/kconf/internal.h
create mode 100644 backport/kconf/kconf_id.c
create mode 100644 backport/kconf/kconfig.Makefile
create mode 100644 backport/kconf/kconfig/.gitignore
create mode 100644 backport/kconf/lexer.l
create mode 100644 backport/kconf/list.h
create mode 100644 backport/kconf/lkc.h
create mode 100644 backport/kconf/lkc_proto.h
create mode 100644 backport/kconf/lxdialog/.gitignore
create mode 100644 backport/kconf/lxdialog/BIG.FAT.WARNING
create mode 100644 backport/kconf/lxdialog/checklist.c
create mode 100644 backport/kconf/lxdialog/dialog.h
create mode 100644 backport/kconf/lxdialog/inputbox.c
create mode 100644 backport/kconf/lxdialog/menubox.c
create mode 100644 backport/kconf/lxdialog/textbox.c
create mode 100644 backport/kconf/lxdialog/util.c
create mode 100644 backport/kconf/lxdialog/yesno.c
create mode 100755 backport/kconf/mconf-cfg.sh
create mode 100644 backport/kconf/mconf.c
create mode 100644 backport/kconf/menu.c
create mode 100755 backport/kconf/nconf-cfg.sh
create mode 100644 backport/kconf/nconf.c
create mode 100644 backport/kconf/nconf.gui.c
create mode 100644 backport/kconf/nconf.h
create mode 100644 backport/kconf/parser.y
create mode 100644 backport/kconf/preprocess.c
create mode 100755 backport/kconf/setlocalversion
create mode 100644 backport/kconf/symbol.c
create mode 100755 backport/kconf/update-upstream-kconfig.sh
create mode 100644 backport/kconf/util.c
diff --git a/backport/kconf/.gitignore b/backport/kconf/.gitignore
new file mode 100644
index 000000000000..5e7b6db65d4e
--- /dev/null
+++ b/backport/kconf/.gitignore
@@ -0,0 +1,24 @@
+#
+# Generated files
+#
+*.moc
+*.lex.c
+
+#
+# configuration programs
+#
+conf
+mconf
+nconf
+qconf
+gconf
+
+parser.tab.h
+parser.tab.c
+
+*.o
+*.o.cmd
+
+lxdialog/*.o.cmd
+lxdialog/*.o
+
diff --git a/backport/kconf/GPL-2.0 b/backport/kconf/GPL-2.0
new file mode 100644
index 000000000000..ff0812fd89cc
--- /dev/null
+++ b/backport/kconf/GPL-2.0
@@ -0,0 +1,359 @@
+Valid-License-Identifier: GPL-2.0
+Valid-License-Identifier: GPL-2.0-only
+Valid-License-Identifier: GPL-2.0+
+Valid-License-Identifier: GPL-2.0-or-later
+SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
+Usage-Guide:
+ To use this license in source code, put one of the following SPDX
+ tag/value pairs into a comment according to the placement
+ guidelines in the licensing rules documentation.
+ For 'GNU General Public License (GPL) version 2 only' use:
+ SPDX-License-Identifier: GPL-2.0
+ or
+ SPDX-License-Identifier: GPL-2.0-only
+ For 'GNU General Public License (GPL) version 2 or any later version' use:
+ SPDX-License-Identifier: GPL-2.0+
+ or
+ SPDX-License-Identifier: GPL-2.0-or-later
+License-Text:
+
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users. This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it. (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.) You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
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+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
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+\f
+ GNU GENERAL PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. This License applies to any program or other work which contains
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+implemented by public license practices. Many people have made
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+to distribute software through any other system and a licensee cannot
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+
+This section is intended to make thoroughly clear what is believed to
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+\f
+ 8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
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+either of that version or of any later version published by the Free
+Software Foundation. If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+ 10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
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+
+ NO WARRANTY
+
+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
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+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+\f
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+ Gnomovision version 69, Copyright (C) year name of author
+ Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+ `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+ <signature of Ty Coon>, 1 April 1989
+ Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs. If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library. If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff --git a/backport/kconf/Kbuild.include b/backport/kconf/Kbuild.include
new file mode 100644
index 000000000000..64492aedcad3
--- /dev/null
+++ b/backport/kconf/Kbuild.include
@@ -0,0 +1,73 @@
+####
+# SPDX-License-Identifier: GPL-2.0
+#
+# kbuild: Generic definitions
+#
+# Simplified Generic definitions for subtree uses. This file is purposely
+# maintained to be as simple as possible. We only carry what we need.
+#
+# Part of the https://github.com/mcgrof/kconfig.git
+
+# Convenient variables
+comma := ,
+quote := "
+squote := '
+empty :=
+space := $(empty) $(empty)
+space_escape := _-_SPACE_-_
+pound := \#
+
+###
+# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
+dot-target = $(dir $@).$(notdir $@)
+
+###
+# The temporary file to save gcc -MD generated dependencies must not
+# contain a comma
+depfile = $(subst $(comma),_,$(dot-target).d)
+
+###
+# filename of target with directory and extension stripped
+basetarget = $(basename $(notdir $@))
+
+###
+# filename of first prerequisite with directory and extension stripped
+baseprereq = $(basename $(notdir $<))
+
+###
+# Escape single quote for use in echo statements
+escsq = $(subst $(squote),'\$(squote)',$1)
+
+###
+# Easy method for doing a status message
+ kecho := :
+ quiet_kecho := echo
+silent_kecho := :
+kecho := $($(quiet)kecho)
+
+###
+# filechk is used to check if the content of a generated file is updated.
+# Sample usage:
+# define filechk_sample
+# echo $KERNELRELEASE
+# endef
+# version.h : Makefile
+# $(call filechk,sample)
+# The rule defined shall write to stdout the content of the new file.
+# The existing file will be compared with the new one.
+# - If no file exist it is created
+# - If the content differ the new file is used
+# - If they are equal no change, and no timestamp update
+# - stdin is piped in from the first prerequisite ($<) so one has
+# to specify a valid file as first prerequisite (often the kbuild file)
+define filechk
+ $(Q)set -e; \
+ mkdir -p $(dir $@); \
+ $(filechk_$(1)) > $@.tmp; \
+ if [ -r $@ ] && cmp -s $@ $@.tmp; then \
+ rm -f $@.tmp; \
+ else \
+ $(kecho) ' UPD $@'; \
+ mv -f $@.tmp $@; \
+ fi
+endef
diff --git a/backport/kconf/Makefile b/backport/kconf/Makefile
new file mode 100644
index 000000000000..785bd2dec057
--- /dev/null
+++ b/backport/kconf/Makefile
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Simplified kconfig Makefile for subtree uses. This file is purposely
+# maintained to be as simple as possible. The rest of the files in this
+# directory are meant to match upstream.
+#
+# Part of the https://github.com/mcgrof/kconfig.git
+
+CFLAGS=-Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
+LXDIALOG := lxdialog/checklist.o lxdialog/inputbox.o lxdialog/menubox.o lxdialog/textbox.o lxdialog/util.o lxdialog/yesno.o
+
+default: mconf
+
+common-objs := confdata.o expr.o menu.o parser.tab.o lexer.lex.c \
+ preprocess.o symbol.o util.o
+
+parser.tab.c: parser.y
+ @bison -oparser.tab.c --defines=parser.tab.h -t -l parser.y
+ @flex -olexer.lex.c -L lexer.l
+
+conf: conf.o $(common-objs)
+ $(CC) -o conf $^
+
+mconf_CFLAGS := $(shell test -f $(CURDIR)/.mconf-cfg && . $(CURDIR)/.mconf-cfg && echo $$cflags) -DLOCALE
+mconf_LDFLAGS := $(shell test -f $(CURDIR)/.mconf-cfg && . $(CURDIR)/.mconf-cfg && echo $$libs)
+mconf: CFLAGS += ${mconf_CFLAGS}
+
+nconf_CFLAGS := $(shell test -f $(CURDIR)/.nconf-cfg && . $(CURDIR)/.nconf-cfg && echo $$cflags) -DLOCALE
+nconf_LDFLAGS := $(shell test -f $(CURDIR)/.nconf-cfg && . $(CURDIR)/.nconf-cfg && echo $$libs)
+nconf: CFLAGS += ${nconf_CFLAGS}
+
+include $(CURDIR)/Kbuild.include
+# check if necessary packages are available, and configure build flags
+define filechk_conf_cfg
+ $(CURDIR)/$<
+endef
+
+.%conf-cfg: %conf-cfg.sh
+ $(call filechk,conf_cfg)
+
+MCONF_DEPS := mconf.o $(LXDIALOG) $(common-objs)
+mconf: .mconf-cfg conf $(MCONF_DEPS)
+ $(CC) -o mconf $(MCONF_DEPS) $(mconf_LDFLAGS)
+
+NCONF_DEPS := nconf.o nconf.gui.o parser.tab.c
+nconf: .nconf-cfg conf $(NCONF_DEPS)
+ $(CC) -o nconf $(NCONF_DEPS) $(nconf_LDFLAGS)
+
+.PHONY: help
+help:
+ @echo "Configuration options:"
+ @echo "menuconfig - demos the menuconfig functionality"
+ @echo "nconfig - demos the nconfig functionality"
+ @echo "allyesconfig - enables all bells and whistles"
+ @echo "allnoconfig - disables all bells and whistles"
+ @echo "randconfig - random configuration"
+ @echo "defconfig-* - If you have files in the defconfig directory use default config from there"
+
+.PHONY: clean
+clean:
+ @rm -f conf mconf conf *.o lxdialog/*.o *.o parser.tab.c .mconf-cfg *.lex.c
+ @rm -rf *.o.d
diff --git a/backport/kconf/README.kconfig b/backport/kconf/README.kconfig
new file mode 100644
index 000000000000..ccd70231c0a8
--- /dev/null
+++ b/backport/kconf/README.kconfig
@@ -0,0 +1,13 @@
+This effort allows for independent projects to use the Linux kernel's
+kconfig on external projects, and make updates of config really easy
+to do. It does this by letting you use this tree as a git subtree.
+
+For more details and to keep this small please refer to a simple demo
+project which demonstrates how to use this and uses it itself:
+
+https://github.com/mcgrof/init-kconfig
+
+The following projects use this git tree as a git subtree as well:
+
+ * https://github.com/mcgrof/kdevops
+ * https://github.com/mcgrof/fio-tests
diff --git a/backport/kconf/conf.c b/backport/kconf/conf.c
new file mode 100644
index 000000000000..4178065ca27f
--- /dev/null
+++ b/backport/kconf/conf.c
@@ -0,0 +1,921 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ */
+
+#include <ctype.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <sys/time.h>
+#include <errno.h>
+
+#include "lkc.h"
+
+static void conf(struct menu *menu);
+static void check_conf(struct menu *menu);
+
+enum input_mode {
+ oldaskconfig,
+ syncconfig,
+ oldconfig,
+ allnoconfig,
+ allyesconfig,
+ allmodconfig,
+ alldefconfig,
+ randconfig,
+ defconfig,
+ savedefconfig,
+ listnewconfig,
+ helpnewconfig,
+ olddefconfig,
+ yes2modconfig,
+ mod2yesconfig,
+ mod2noconfig,
+};
+static enum input_mode input_mode = oldaskconfig;
+static int input_mode_opt;
+static int indent = 1;
+static int tty_stdio;
+static int sync_kconfig;
+static int conf_cnt;
+static char line[PATH_MAX];
+static struct menu *rootEntry;
+
+static void print_help(struct menu *menu)
+{
+ struct gstr help = str_new();
+
+ menu_get_ext_help(menu, &help);
+
+ printf("\n%s\n", str_get(&help));
+ str_free(&help);
+}
+
+static void strip(char *str)
+{
+ char *p = str;
+ int l;
+
+ while ((isspace(*p)))
+ p++;
+ l = strlen(p);
+ if (p != str)
+ memmove(str, p, l + 1);
+ if (!l)
+ return;
+ p = str + l - 1;
+ while ((isspace(*p)))
+ *p-- = 0;
+}
+
+/* Helper function to facilitate fgets() by Jean Sacren. */
+static void xfgets(char *str, int size, FILE *in)
+{
+ if (!fgets(str, size, in))
+ fprintf(stderr, "\nError in reading or end of file.\n");
+
+ if (!tty_stdio)
+ printf("%s", str);
+}
+
+static void set_randconfig_seed(void)
+{
+ unsigned int seed;
+ char *env;
+ bool seed_set = false;
+
+ env = getenv("KCONFIG_SEED");
+ if (env && *env) {
+ char *endp;
+
+ seed = strtol(env, &endp, 0);
+ if (*endp == '\0')
+ seed_set = true;
+ }
+
+ if (!seed_set) {
+ struct timeval now;
+
+ /*
+ * Use microseconds derived seed, compensate for systems where it may
+ * be zero.
+ */
+ gettimeofday(&now, NULL);
+ seed = (now.tv_sec + 1) * (now.tv_usec + 1);
+ }
+
+ printf("KCONFIG_SEED=0x%X\n", seed);
+ srand(seed);
+}
+
+static bool randomize_choice_values(struct symbol *csym)
+{
+ struct property *prop;
+ struct symbol *sym;
+ struct expr *e;
+ int cnt, def;
+
+ /*
+ * If choice is mod then we may have more items selected
+ * and if no then no-one.
+ * In both cases stop.
+ */
+ if (csym->curr.tri != yes)
+ return false;
+
+ prop = sym_get_choice_prop(csym);
+
+ /* count entries in choice block */
+ cnt = 0;
+ expr_list_for_each_sym(prop->expr, e, sym)
+ cnt++;
+
+ /*
+ * find a random value and set it to yes,
+ * set the rest to no so we have only one set
+ */
+ def = rand() % cnt;
+
+ cnt = 0;
+ expr_list_for_each_sym(prop->expr, e, sym) {
+ if (def == cnt++) {
+ sym->def[S_DEF_USER].tri = yes;
+ csym->def[S_DEF_USER].val = sym;
+ } else {
+ sym->def[S_DEF_USER].tri = no;
+ }
+ sym->flags |= SYMBOL_DEF_USER;
+ /* clear VALID to get value calculated */
+ sym->flags &= ~SYMBOL_VALID;
+ }
+ csym->flags |= SYMBOL_DEF_USER;
+ /* clear VALID to get value calculated */
+ csym->flags &= ~SYMBOL_VALID;
+
+ return true;
+}
+
+enum conf_def_mode {
+ def_default,
+ def_yes,
+ def_mod,
+ def_no,
+ def_random
+};
+
+static bool conf_set_all_new_symbols(enum conf_def_mode mode)
+{
+ struct symbol *sym, *csym;
+ int i, cnt;
+ /*
+ * can't go as the default in switch-case below, otherwise gcc whines
+ * about -Wmaybe-uninitialized
+ */
+ int pby = 50; /* probability of bool = y */
+ int pty = 33; /* probability of tristate = y */
+ int ptm = 33; /* probability of tristate = m */
+ bool has_changed = false;
+
+ if (mode == def_random) {
+ int n, p[3];
+ char *env = getenv("KCONFIG_PROBABILITY");
+
+ n = 0;
+ while (env && *env) {
+ char *endp;
+ int tmp = strtol(env, &endp, 10);
+
+ if (tmp >= 0 && tmp <= 100) {
+ p[n++] = tmp;
+ } else {
+ errno = ERANGE;
+ perror("KCONFIG_PROBABILITY");
+ exit(1);
+ }
+ env = (*endp == ':') ? endp + 1 : endp;
+ if (n >= 3)
+ break;
+ }
+ switch (n) {
+ case 1:
+ pby = p[0];
+ ptm = pby / 2;
+ pty = pby - ptm;
+ break;
+ case 2:
+ pty = p[0];
+ ptm = p[1];
+ pby = pty + ptm;
+ break;
+ case 3:
+ pby = p[0];
+ pty = p[1];
+ ptm = p[2];
+ break;
+ }
+
+ if (pty + ptm > 100) {
+ errno = ERANGE;
+ perror("KCONFIG_PROBABILITY");
+ exit(1);
+ }
+ }
+
+ for_all_symbols(i, sym) {
+ if (sym_has_value(sym) || sym->flags & SYMBOL_VALID)
+ continue;
+ switch (sym_get_type(sym)) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ has_changed = true;
+ switch (mode) {
+ case def_yes:
+ sym->def[S_DEF_USER].tri = yes;
+ break;
+ case def_mod:
+ sym->def[S_DEF_USER].tri = mod;
+ break;
+ case def_no:
+ sym->def[S_DEF_USER].tri = no;
+ break;
+ case def_random:
+ sym->def[S_DEF_USER].tri = no;
+ cnt = rand() % 100;
+ if (sym->type == S_TRISTATE) {
+ if (cnt < pty)
+ sym->def[S_DEF_USER].tri = yes;
+ else if (cnt < pty + ptm)
+ sym->def[S_DEF_USER].tri = mod;
+ } else if (cnt < pby)
+ sym->def[S_DEF_USER].tri = yes;
+ break;
+ default:
+ continue;
+ }
+ if (!(sym_is_choice(sym) && mode == def_random))
+ sym->flags |= SYMBOL_DEF_USER;
+ break;
+ default:
+ break;
+ }
+
+ }
+
+ sym_clear_all_valid();
+
+ /*
+ * We have different type of choice blocks.
+ * If curr.tri equals to mod then we can select several
+ * choice symbols in one block.
+ * In this case we do nothing.
+ * If curr.tri equals yes then only one symbol can be
+ * selected in a choice block and we set it to yes,
+ * and the rest to no.
+ */
+ if (mode != def_random) {
+ for_all_symbols(i, csym) {
+ if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
+ sym_is_choice_value(csym))
+ csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
+ }
+ }
+
+ for_all_symbols(i, csym) {
+ if (sym_has_value(csym) || !sym_is_choice(csym))
+ continue;
+
+ sym_calc_value(csym);
+ if (mode == def_random)
+ has_changed |= randomize_choice_values(csym);
+ else {
+ set_all_choice_values(csym);
+ has_changed = true;
+ }
+ }
+
+ return has_changed;
+}
+
+static void conf_rewrite_tristates(tristate old_val, tristate new_val)
+{
+ struct symbol *sym;
+ int i;
+
+ for_all_symbols(i, sym) {
+ if (sym_get_type(sym) == S_TRISTATE &&
+ sym->def[S_DEF_USER].tri == old_val)
+ sym->def[S_DEF_USER].tri = new_val;
+ }
+ sym_clear_all_valid();
+}
+
+static int conf_askvalue(struct symbol *sym, const char *def)
+{
+ if (!sym_has_value(sym))
+ printf("(NEW) ");
+
+ line[0] = '\n';
+ line[1] = 0;
+
+ if (!sym_is_changeable(sym)) {
+ printf("%s\n", def);
+ line[0] = '\n';
+ line[1] = 0;
+ return 0;
+ }
+
+ switch (input_mode) {
+ case oldconfig:
+ case syncconfig:
+ if (sym_has_value(sym)) {
+ printf("%s\n", def);
+ return 0;
+ }
+ /* fall through */
+ default:
+ fflush(stdout);
+ xfgets(line, sizeof(line), stdin);
+ break;
+ }
+
+ return 1;
+}
+
+static int conf_string(struct menu *menu)
+{
+ struct symbol *sym = menu->sym;
+ const char *def;
+
+ while (1) {
+ printf("%*s%s ", indent - 1, "", menu->prompt->text);
+ printf("(%s) ", sym->name);
+ def = sym_get_string_value(sym);
+ if (def)
+ printf("[%s] ", def);
+ if (!conf_askvalue(sym, def))
+ return 0;
+ switch (line[0]) {
+ case '\n':
+ break;
+ case '?':
+ /* print help */
+ if (line[1] == '\n') {
+ print_help(menu);
+ def = NULL;
+ break;
+ }
+ /* fall through */
+ default:
+ line[strlen(line)-1] = 0;
+ def = line;
+ }
+ if (def && sym_set_string_value(sym, def))
+ return 0;
+ }
+}
+
+static int conf_sym(struct menu *menu)
+{
+ struct symbol *sym = menu->sym;
+ tristate oldval, newval;
+
+ while (1) {
+ printf("%*s%s ", indent - 1, "", menu->prompt->text);
+ if (sym->name)
+ printf("(%s) ", sym->name);
+ putchar('[');
+ oldval = sym_get_tristate_value(sym);
+ switch (oldval) {
+ case no:
+ putchar('N');
+ break;
+ case mod:
+ putchar('M');
+ break;
+ case yes:
+ putchar('Y');
+ break;
+ }
+ if (oldval != no && sym_tristate_within_range(sym, no))
+ printf("/n");
+ if (oldval != mod && sym_tristate_within_range(sym, mod))
+ printf("/m");
+ if (oldval != yes && sym_tristate_within_range(sym, yes))
+ printf("/y");
+ printf("/?] ");
+ if (!conf_askvalue(sym, sym_get_string_value(sym)))
+ return 0;
+ strip(line);
+
+ switch (line[0]) {
+ case 'n':
+ case 'N':
+ newval = no;
+ if (!line[1] || !strcmp(&line[1], "o"))
+ break;
+ continue;
+ case 'm':
+ case 'M':
+ newval = mod;
+ if (!line[1])
+ break;
+ continue;
+ case 'y':
+ case 'Y':
+ newval = yes;
+ if (!line[1] || !strcmp(&line[1], "es"))
+ break;
+ continue;
+ case 0:
+ newval = oldval;
+ break;
+ case '?':
+ goto help;
+ default:
+ continue;
+ }
+ if (sym_set_tristate_value(sym, newval))
+ return 0;
+help:
+ print_help(menu);
+ }
+}
+
+static int conf_choice(struct menu *menu)
+{
+ struct symbol *sym, *def_sym;
+ struct menu *child;
+ bool is_new;
+
+ sym = menu->sym;
+ is_new = !sym_has_value(sym);
+ if (sym_is_changeable(sym)) {
+ conf_sym(menu);
+ sym_calc_value(sym);
+ switch (sym_get_tristate_value(sym)) {
+ case no:
+ return 1;
+ case mod:
+ return 0;
+ case yes:
+ break;
+ }
+ } else {
+ switch (sym_get_tristate_value(sym)) {
+ case no:
+ return 1;
+ case mod:
+ printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
+ return 0;
+ case yes:
+ break;
+ }
+ }
+
+ while (1) {
+ int cnt, def;
+
+ printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
+ def_sym = sym_get_choice_value(sym);
+ cnt = def = 0;
+ line[0] = 0;
+ for (child = menu->list; child; child = child->next) {
+ if (!menu_is_visible(child))
+ continue;
+ if (!child->sym) {
+ printf("%*c %s\n", indent, '*', menu_get_prompt(child));
+ continue;
+ }
+ cnt++;
+ if (child->sym == def_sym) {
+ def = cnt;
+ printf("%*c", indent, '>');
+ } else
+ printf("%*c", indent, ' ');
+ printf(" %d. %s", cnt, menu_get_prompt(child));
+ if (child->sym->name)
+ printf(" (%s)", child->sym->name);
+ if (!sym_has_value(child->sym))
+ printf(" (NEW)");
+ printf("\n");
+ }
+ printf("%*schoice", indent - 1, "");
+ if (cnt == 1) {
+ printf("[1]: 1\n");
+ goto conf_childs;
+ }
+ printf("[1-%d?]: ", cnt);
+ switch (input_mode) {
+ case oldconfig:
+ case syncconfig:
+ if (!is_new) {
+ cnt = def;
+ printf("%d\n", cnt);
+ break;
+ }
+ /* fall through */
+ case oldaskconfig:
+ fflush(stdout);
+ xfgets(line, sizeof(line), stdin);
+ strip(line);
+ if (line[0] == '?') {
+ print_help(menu);
+ continue;
+ }
+ if (!line[0])
+ cnt = def;
+ else if (isdigit(line[0]))
+ cnt = atoi(line);
+ else
+ continue;
+ break;
+ default:
+ break;
+ }
+
+ conf_childs:
+ for (child = menu->list; child; child = child->next) {
+ if (!child->sym || !menu_is_visible(child))
+ continue;
+ if (!--cnt)
+ break;
+ }
+ if (!child)
+ continue;
+ if (line[0] && line[strlen(line) - 1] == '?') {
+ print_help(child);
+ continue;
+ }
+ sym_set_choice_value(sym, child->sym);
+ for (child = child->list; child; child = child->next) {
+ indent += 2;
+ conf(child);
+ indent -= 2;
+ }
+ return 1;
+ }
+}
+
+static void conf(struct menu *menu)
+{
+ struct symbol *sym;
+ struct property *prop;
+ struct menu *child;
+
+ if (!menu_is_visible(menu))
+ return;
+
+ sym = menu->sym;
+ prop = menu->prompt;
+ if (prop) {
+ const char *prompt;
+
+ switch (prop->type) {
+ case P_MENU:
+ /*
+ * Except in oldaskconfig mode, we show only menus that
+ * contain new symbols.
+ */
+ if (input_mode != oldaskconfig && rootEntry != menu) {
+ check_conf(menu);
+ return;
+ }
+ /* fall through */
+ case P_COMMENT:
+ prompt = menu_get_prompt(menu);
+ if (prompt)
+ printf("%*c\n%*c %s\n%*c\n",
+ indent, '*',
+ indent, '*', prompt,
+ indent, '*');
+ default:
+ ;
+ }
+ }
+
+ if (!sym)
+ goto conf_childs;
+
+ if (sym_is_choice(sym)) {
+ conf_choice(menu);
+ if (sym->curr.tri != mod)
+ return;
+ goto conf_childs;
+ }
+
+ switch (sym->type) {
+ case S_INT:
+ case S_HEX:
+ case S_STRING:
+ conf_string(menu);
+ break;
+ default:
+ conf_sym(menu);
+ break;
+ }
+
+conf_childs:
+ if (sym)
+ indent += 2;
+ for (child = menu->list; child; child = child->next)
+ conf(child);
+ if (sym)
+ indent -= 2;
+}
+
+static void check_conf(struct menu *menu)
+{
+ struct symbol *sym;
+ struct menu *child;
+
+ if (!menu_is_visible(menu))
+ return;
+
+ sym = menu->sym;
+ if (sym && !sym_has_value(sym) &&
+ (sym_is_changeable(sym) ||
+ (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes))) {
+
+ switch (input_mode) {
+ case listnewconfig:
+ if (sym->name)
+ print_symbol_for_listconfig(sym);
+ break;
+ case helpnewconfig:
+ printf("-----\n");
+ print_help(menu);
+ printf("-----\n");
+ break;
+ default:
+ if (!conf_cnt++)
+ printf("*\n* Restart config...\n*\n");
+ rootEntry = menu_get_parent_menu(menu);
+ conf(rootEntry);
+ break;
+ }
+ }
+
+ for (child = menu->list; child; child = child->next)
+ check_conf(child);
+}
+
+static const struct option long_opts[] = {
+ {"help", no_argument, NULL, 'h'},
+ {"silent", no_argument, NULL, 's'},
+ {"oldaskconfig", no_argument, &input_mode_opt, oldaskconfig},
+ {"oldconfig", no_argument, &input_mode_opt, oldconfig},
+ {"syncconfig", no_argument, &input_mode_opt, syncconfig},
+ {"defconfig", required_argument, &input_mode_opt, defconfig},
+ {"savedefconfig", required_argument, &input_mode_opt, savedefconfig},
+ {"allnoconfig", no_argument, &input_mode_opt, allnoconfig},
+ {"allyesconfig", no_argument, &input_mode_opt, allyesconfig},
+ {"allmodconfig", no_argument, &input_mode_opt, allmodconfig},
+ {"alldefconfig", no_argument, &input_mode_opt, alldefconfig},
+ {"randconfig", no_argument, &input_mode_opt, randconfig},
+ {"listnewconfig", no_argument, &input_mode_opt, listnewconfig},
+ {"helpnewconfig", no_argument, &input_mode_opt, helpnewconfig},
+ {"olddefconfig", no_argument, &input_mode_opt, olddefconfig},
+ {"yes2modconfig", no_argument, &input_mode_opt, yes2modconfig},
+ {"mod2yesconfig", no_argument, &input_mode_opt, mod2yesconfig},
+ {"mod2noconfig", no_argument, &input_mode_opt, mod2noconfig},
+ {NULL, 0, NULL, 0}
+};
+
+static void conf_usage(const char *progname)
+{
+ printf("Usage: %s [options] <kconfig-file>\n", progname);
+ printf("\n");
+ printf("Generic options:\n");
+ printf(" -h, --help Print this message and exit.\n");
+ printf(" -s, --silent Do not print log.\n");
+ printf("\n");
+ printf("Mode options:\n");
+ printf(" --listnewconfig List new options\n");
+ printf(" --helpnewconfig List new options and help text\n");
+ printf(" --oldaskconfig Start a new configuration using a line-oriented program\n");
+ printf(" --oldconfig Update a configuration using a provided .config as base\n");
+ printf(" --syncconfig Similar to oldconfig but generates configuration in\n"
+ " include/{generated/,config/}\n");
+ printf(" --olddefconfig Same as oldconfig but sets new symbols to their default value\n");
+ printf(" --defconfig <file> New config with default defined in <file>\n");
+ printf(" --savedefconfig <file> Save the minimal current configuration to <file>\n");
+ printf(" --allnoconfig New config where all options are answered with no\n");
+ printf(" --allyesconfig New config where all options are answered with yes\n");
+ printf(" --allmodconfig New config where all options are answered with mod\n");
+ printf(" --alldefconfig New config with all symbols set to default\n");
+ printf(" --randconfig New config with random answer to all options\n");
+ printf(" --yes2modconfig Change answers from yes to mod if possible\n");
+ printf(" --mod2yesconfig Change answers from mod to yes if possible\n");
+ printf(" --mod2noconfig Change answers from mod to no if possible\n");
+ printf(" (If none of the above is given, --oldaskconfig is the default)\n");
+}
+
+int main(int ac, char **av)
+{
+ const char *progname = av[0];
+ int opt;
+ const char *name, *defconfig_file = NULL /* gcc uninit */;
+ int no_conf_write = 0;
+
+ tty_stdio = isatty(0) && isatty(1);
+
+ while ((opt = getopt_long(ac, av, "hs", long_opts, NULL)) != -1) {
+ switch (opt) {
+ case 'h':
+ conf_usage(progname);
+ exit(1);
+ break;
+ case 's':
+ conf_set_message_callback(NULL);
+ break;
+ case 0:
+ input_mode = input_mode_opt;
+ switch (input_mode) {
+ case syncconfig:
+ /*
+ * syncconfig is invoked during the build stage.
+ * Suppress distracting
+ * "configuration written to ..."
+ */
+ conf_set_message_callback(NULL);
+ sync_kconfig = 1;
+ break;
+ case defconfig:
+ case savedefconfig:
+ defconfig_file = optarg;
+ break;
+ case randconfig:
+ set_randconfig_seed();
+ break;
+ default:
+ break;
+ }
+ default:
+ break;
+ }
+ }
+ if (ac == optind) {
+ fprintf(stderr, "%s: Kconfig file missing\n", av[0]);
+ conf_usage(progname);
+ exit(1);
+ }
+ conf_parse(av[optind]);
+ //zconfdump(stdout);
+
+ switch (input_mode) {
+ case defconfig:
+ if (conf_read(defconfig_file)) {
+ fprintf(stderr,
+ "***\n"
+ "*** Can't find default configuration \"%s\"!\n"
+ "***\n",
+ defconfig_file);
+ exit(1);
+ }
+ break;
+ case savedefconfig:
+ case syncconfig:
+ case oldaskconfig:
+ case oldconfig:
+ case listnewconfig:
+ case helpnewconfig:
+ case olddefconfig:
+ case yes2modconfig:
+ case mod2yesconfig:
+ case mod2noconfig:
+ conf_read(NULL);
+ break;
+ case allnoconfig:
+ case allyesconfig:
+ case allmodconfig:
+ case alldefconfig:
+ case randconfig:
+ name = getenv("KCONFIG_ALLCONFIG");
+ if (!name)
+ break;
+ if ((strcmp(name, "") != 0) && (strcmp(name, "1") != 0)) {
+ if (conf_read_simple(name, S_DEF_USER)) {
+ fprintf(stderr,
+ "*** Can't read seed configuration \"%s\"!\n",
+ name);
+ exit(1);
+ }
+ break;
+ }
+ switch (input_mode) {
+ case allnoconfig: name = "allno.config"; break;
+ case allyesconfig: name = "allyes.config"; break;
+ case allmodconfig: name = "allmod.config"; break;
+ case alldefconfig: name = "alldef.config"; break;
+ case randconfig: name = "allrandom.config"; break;
+ default: break;
+ }
+ if (conf_read_simple(name, S_DEF_USER) &&
+ conf_read_simple("all.config", S_DEF_USER)) {
+ fprintf(stderr,
+ "*** KCONFIG_ALLCONFIG set, but no \"%s\" or \"all.config\" file found\n",
+ name);
+ exit(1);
+ }
+ break;
+ default:
+ break;
+ }
+
+ if (sync_kconfig) {
+ name = getenv("KCONFIG_NOSILENTUPDATE");
+ if (name && *name) {
+ if (conf_get_changed()) {
+ fprintf(stderr,
+ "\n*** The configuration requires explicit update.\n\n");
+ return 1;
+ }
+ no_conf_write = 1;
+ }
+ }
+
+ switch (input_mode) {
+ case allnoconfig:
+ conf_set_all_new_symbols(def_no);
+ break;
+ case allyesconfig:
+ conf_set_all_new_symbols(def_yes);
+ break;
+ case allmodconfig:
+ conf_set_all_new_symbols(def_mod);
+ break;
+ case alldefconfig:
+ conf_set_all_new_symbols(def_default);
+ break;
+ case randconfig:
+ /* Really nothing to do in this loop */
+ while (conf_set_all_new_symbols(def_random)) ;
+ break;
+ case defconfig:
+ conf_set_all_new_symbols(def_default);
+ break;
+ case savedefconfig:
+ break;
+ case yes2modconfig:
+ conf_rewrite_tristates(yes, mod);
+ break;
+ case mod2yesconfig:
+ conf_rewrite_tristates(mod, yes);
+ break;
+ case mod2noconfig:
+ conf_rewrite_tristates(mod, no);
+ break;
+ case oldaskconfig:
+ rootEntry = &rootmenu;
+ conf(&rootmenu);
+ input_mode = oldconfig;
+ /* fall through */
+ case oldconfig:
+ case listnewconfig:
+ case helpnewconfig:
+ case syncconfig:
+ /* Update until a loop caused no more changes */
+ do {
+ conf_cnt = 0;
+ check_conf(&rootmenu);
+ } while (conf_cnt);
+ break;
+ case olddefconfig:
+ default:
+ break;
+ }
+
+ if (input_mode == savedefconfig) {
+ if (conf_write_defconfig(defconfig_file)) {
+ fprintf(stderr, "n*** Error while saving defconfig to: %s\n\n",
+ defconfig_file);
+ return 1;
+ }
+ } else if (input_mode != listnewconfig && input_mode != helpnewconfig) {
+ if (!no_conf_write && conf_write(NULL)) {
+ fprintf(stderr, "\n*** Error during writing of the configuration.\n\n");
+ exit(1);
+ }
+
+ /*
+ * Create auto.conf if it does not exist.
+ * This prevents GNU Make 4.1 or older from emitting
+ * "include/config/auto.conf: No such file or directory"
+ * in the top-level Makefile
+ *
+ * syncconfig always creates or updates auto.conf because it is
+ * used during the build.
+ */
+ if (conf_write_autoconf(sync_kconfig) && sync_kconfig) {
+ fprintf(stderr,
+ "\n*** Error during sync of the configuration.\n\n");
+ return 1;
+ }
+ }
+ return 0;
+}
diff --git a/backport/kconf/confdata.c b/backport/kconf/confdata.c
new file mode 100644
index 000000000000..ae54319cdde4
--- /dev/null
+++ b/backport/kconf/confdata.c
@@ -0,0 +1,1262 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ */
+
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "lkc.h"
+
+/* return true if 'path' exists, false otherwise */
+static bool is_present(const char *path)
+{
+ struct stat st;
+
+ return !stat(path, &st);
+}
+
+/* return true if 'path' exists and it is a directory, false otherwise */
+static bool is_dir(const char *path)
+{
+ struct stat st;
+
+ if (stat(path, &st))
+ return false;
+
+ return S_ISDIR(st.st_mode);
+}
+
+/* return true if the given two files are the same, false otherwise */
+static bool is_same(const char *file1, const char *file2)
+{
+ int fd1, fd2;
+ struct stat st1, st2;
+ void *map1, *map2;
+ bool ret = false;
+
+ fd1 = open(file1, O_RDONLY);
+ if (fd1 < 0)
+ return ret;
+
+ fd2 = open(file2, O_RDONLY);
+ if (fd2 < 0)
+ goto close1;
+
+ ret = fstat(fd1, &st1);
+ if (ret)
+ goto close2;
+ ret = fstat(fd2, &st2);
+ if (ret)
+ goto close2;
+
+ if (st1.st_size != st2.st_size)
+ goto close2;
+
+ map1 = mmap(NULL, st1.st_size, PROT_READ, MAP_PRIVATE, fd1, 0);
+ if (map1 == MAP_FAILED)
+ goto close2;
+
+ map2 = mmap(NULL, st2.st_size, PROT_READ, MAP_PRIVATE, fd2, 0);
+ if (map2 == MAP_FAILED)
+ goto close2;
+
+ if (bcmp(map1, map2, st1.st_size))
+ goto close2;
+
+ ret = true;
+close2:
+ close(fd2);
+close1:
+ close(fd1);
+
+ return ret;
+}
+
+/*
+ * Create the parent directory of the given path.
+ *
+ * For example, if 'include/config/auto.conf' is given, create 'include/config'.
+ */
+static int make_parent_dir(const char *path)
+{
+ char tmp[PATH_MAX + 1];
+ char *p;
+
+ strncpy(tmp, path, sizeof(tmp));
+ tmp[sizeof(tmp) - 1] = 0;
+
+ /* Remove the base name. Just return if nothing is left */
+ p = strrchr(tmp, '/');
+ if (!p)
+ return 0;
+ *(p + 1) = 0;
+
+ /* Just in case it is an absolute path */
+ p = tmp;
+ while (*p == '/')
+ p++;
+
+ while ((p = strchr(p, '/'))) {
+ *p = 0;
+
+ /* skip if the directory exists */
+ if (!is_dir(tmp) && mkdir(tmp, 0755))
+ return -1;
+
+ *p = '/';
+ while (*p == '/')
+ p++;
+ }
+
+ return 0;
+}
+
+static char depfile_path[PATH_MAX];
+static size_t depfile_prefix_len;
+
+/* touch depfile for symbol 'name' */
+static int conf_touch_dep(const char *name)
+{
+ int fd;
+
+ /* check overflow: prefix + name + '\0' must fit in buffer. */
+ if (depfile_prefix_len + strlen(name) + 1 > sizeof(depfile_path))
+ return -1;
+
+ strcpy(depfile_path + depfile_prefix_len, name);
+
+ fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
+ if (fd == -1)
+ return -1;
+ close(fd);
+
+ return 0;
+}
+
+static void conf_warning(const char *fmt, ...)
+ __attribute__ ((format (printf, 1, 2)));
+
+static void conf_message(const char *fmt, ...)
+ __attribute__ ((format (printf, 1, 2)));
+
+static const char *conf_filename;
+static int conf_lineno, conf_warnings;
+
+static void conf_warning(const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
+ vfprintf(stderr, fmt, ap);
+ fprintf(stderr, "\n");
+ va_end(ap);
+ conf_warnings++;
+}
+
+static void conf_default_message_callback(const char *s)
+{
+ printf("#\n# ");
+ printf("%s", s);
+ printf("\n#\n");
+}
+
+static void (*conf_message_callback)(const char *s) =
+ conf_default_message_callback;
+void conf_set_message_callback(void (*fn)(const char *s))
+{
+ conf_message_callback = fn;
+}
+
+static void conf_message(const char *fmt, ...)
+{
+ va_list ap;
+ char buf[4096];
+
+ if (!conf_message_callback)
+ return;
+
+ va_start(ap, fmt);
+
+ vsnprintf(buf, sizeof(buf), fmt, ap);
+ conf_message_callback(buf);
+ va_end(ap);
+}
+
+const char *conf_get_configname(void)
+{
+ char *name = getenv("KCONFIG_CONFIG");
+
+ return name ? name : ".config";
+}
+
+static const char *conf_get_autoconfig_name(void)
+{
+ char *name = getenv("KCONFIG_AUTOCONFIG");
+
+ return name ? name : "include/config/auto.conf";
+}
+
+static const char *conf_get_autoheader_name(void)
+{
+ char *name = getenv("KCONFIG_AUTOHEADER");
+
+ return name ? name : "include/generated/autoconf.h";
+}
+
+static const char *conf_get_rustccfg_name(void)
+{
+ char *name = getenv("KCONFIG_RUSTCCFG");
+
+ return name ? name : "include/generated/rustc_cfg";
+}
+
+static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
+{
+ char *p2;
+
+ switch (sym->type) {
+ case S_TRISTATE:
+ if (p[0] == 'm') {
+ sym->def[def].tri = mod;
+ sym->flags |= def_flags;
+ break;
+ }
+ /* fall through */
+ case S_BOOLEAN:
+ if (p[0] == 'y') {
+ sym->def[def].tri = yes;
+ sym->flags |= def_flags;
+ break;
+ }
+ if (p[0] == 'n') {
+ sym->def[def].tri = no;
+ sym->flags |= def_flags;
+ break;
+ }
+ if (def != S_DEF_AUTO)
+ conf_warning("symbol value '%s' invalid for %s",
+ p, sym->name);
+ return 1;
+ case S_STRING:
+ /* No escaping for S_DEF_AUTO (include/config/auto.conf) */
+ if (def != S_DEF_AUTO) {
+ if (*p++ != '"')
+ break;
+ for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
+ if (*p2 == '"') {
+ *p2 = 0;
+ break;
+ }
+ memmove(p2, p2 + 1, strlen(p2));
+ }
+ if (!p2) {
+ conf_warning("invalid string found");
+ return 1;
+ }
+ }
+ /* fall through */
+ case S_INT:
+ case S_HEX:
+ if (sym_string_valid(sym, p)) {
+ sym->def[def].val = xstrdup(p);
+ sym->flags |= def_flags;
+ } else {
+ if (def != S_DEF_AUTO)
+ conf_warning("symbol value '%s' invalid for %s",
+ p, sym->name);
+ return 1;
+ }
+ break;
+ default:
+ ;
+ }
+ return 0;
+}
+
+#define LINE_GROWTH 16
+static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
+{
+ char *nline;
+ size_t new_size = slen + 1;
+ if (new_size > *n) {
+ new_size += LINE_GROWTH - 1;
+ new_size *= 2;
+ nline = xrealloc(*lineptr, new_size);
+ if (!nline)
+ return -1;
+
+ *lineptr = nline;
+ *n = new_size;
+ }
+
+ (*lineptr)[slen] = c;
+
+ return 0;
+}
+
+static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
+{
+ char *line = *lineptr;
+ size_t slen = 0;
+
+ for (;;) {
+ int c = getc(stream);
+
+ switch (c) {
+ case '\n':
+ if (add_byte(c, &line, slen, n) < 0)
+ goto e_out;
+ slen++;
+ /* fall through */
+ case EOF:
+ if (add_byte('\0', &line, slen, n) < 0)
+ goto e_out;
+ *lineptr = line;
+ if (slen == 0)
+ return -1;
+ return slen;
+ default:
+ if (add_byte(c, &line, slen, n) < 0)
+ goto e_out;
+ slen++;
+ }
+ }
+
+e_out:
+ line[slen-1] = '\0';
+ *lineptr = line;
+ return -1;
+}
+
+int conf_read_simple(const char *name, int def)
+{
+ FILE *in = NULL;
+ char *line = NULL;
+ size_t line_asize = 0;
+ char *p, *p2;
+ struct symbol *sym;
+ int i, def_flags;
+
+ if (name) {
+ in = zconf_fopen(name);
+ } else {
+ char *env;
+
+ name = conf_get_configname();
+ in = zconf_fopen(name);
+ if (in)
+ goto load;
+ conf_set_changed(true);
+
+ env = getenv("KCONFIG_DEFCONFIG_LIST");
+ if (!env)
+ return 1;
+
+ while (1) {
+ bool is_last;
+
+ while (isspace(*env))
+ env++;
+
+ if (!*env)
+ break;
+
+ p = env;
+ while (*p && !isspace(*p))
+ p++;
+
+ is_last = (*p == '\0');
+
+ *p = '\0';
+
+ in = zconf_fopen(env);
+ if (in) {
+ conf_message("using defaults found in %s",
+ env);
+ goto load;
+ }
+
+ if (is_last)
+ break;
+
+ env = p + 1;
+ }
+ }
+ if (!in)
+ return 1;
+
+load:
+ conf_filename = name;
+ conf_lineno = 0;
+ conf_warnings = 0;
+
+ def_flags = SYMBOL_DEF << def;
+ for_all_symbols(i, sym) {
+ sym->flags |= SYMBOL_CHANGED;
+ sym->flags &= ~(def_flags|SYMBOL_VALID);
+ if (sym_is_choice(sym))
+ sym->flags |= def_flags;
+ switch (sym->type) {
+ case S_INT:
+ case S_HEX:
+ case S_STRING:
+ if (sym->def[def].val)
+ free(sym->def[def].val);
+ /* fall through */
+ default:
+ sym->def[def].val = NULL;
+ sym->def[def].tri = no;
+ }
+ }
+
+ while (compat_getline(&line, &line_asize, in) != -1) {
+ conf_lineno++;
+ sym = NULL;
+ if (line[0] == '#') {
+ if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
+ continue;
+ p = strchr(line + 2 + strlen(CONFIG_), ' ');
+ if (!p)
+ continue;
+ *p++ = 0;
+ if (strncmp(p, "is not set", 10))
+ continue;
+ if (def == S_DEF_USER) {
+ sym = sym_find(line + 2 + strlen(CONFIG_));
+ if (!sym) {
+ conf_set_changed(true);
+ continue;
+ }
+ } else {
+ sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
+ if (sym->type == S_UNKNOWN)
+ sym->type = S_BOOLEAN;
+ }
+ if (sym->flags & def_flags) {
+ conf_warning("override: reassigning to symbol %s", sym->name);
+ }
+ switch (sym->type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ sym->def[def].tri = no;
+ sym->flags |= def_flags;
+ break;
+ default:
+ ;
+ }
+ } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
+ p = strchr(line + strlen(CONFIG_), '=');
+ if (!p)
+ continue;
+ *p++ = 0;
+ p2 = strchr(p, '\n');
+ if (p2) {
+ *p2-- = 0;
+ if (*p2 == '\r')
+ *p2 = 0;
+ }
+
+ sym = sym_find(line + strlen(CONFIG_));
+ if (!sym) {
+ if (def == S_DEF_AUTO)
+ /*
+ * Reading from include/config/auto.conf
+ * If CONFIG_FOO previously existed in
+ * auto.conf but it is missing now,
+ * include/config/FOO must be touched.
+ */
+ conf_touch_dep(line + strlen(CONFIG_));
+ else
+ conf_set_changed(true);
+ continue;
+ }
+
+ if (sym->flags & def_flags) {
+ conf_warning("override: reassigning to symbol %s", sym->name);
+ }
+ if (conf_set_sym_val(sym, def, def_flags, p))
+ continue;
+ } else {
+ if (line[0] != '\r' && line[0] != '\n')
+ conf_warning("unexpected data: %.*s",
+ (int)strcspn(line, "\r\n"), line);
+
+ continue;
+ }
+
+ if (sym && sym_is_choice_value(sym)) {
+ struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
+ switch (sym->def[def].tri) {
+ case no:
+ break;
+ case mod:
+ if (cs->def[def].tri == yes) {
+ conf_warning("%s creates inconsistent choice state", sym->name);
+ cs->flags &= ~def_flags;
+ }
+ break;
+ case yes:
+ if (cs->def[def].tri != no)
+ conf_warning("override: %s changes choice state", sym->name);
+ cs->def[def].val = sym;
+ break;
+ }
+ cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
+ }
+ }
+ free(line);
+ fclose(in);
+ return 0;
+}
+
+int conf_read(const char *name)
+{
+ struct symbol *sym;
+ int conf_unsaved = 0;
+ int i;
+
+ conf_set_changed(false);
+
+ if (conf_read_simple(name, S_DEF_USER)) {
+ sym_calc_value(modules_sym);
+ return 1;
+ }
+
+ sym_calc_value(modules_sym);
+
+ for_all_symbols(i, sym) {
+ sym_calc_value(sym);
+ if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE))
+ continue;
+ if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
+ /* check that calculated value agrees with saved value */
+ switch (sym->type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ if (sym->def[S_DEF_USER].tri == sym_get_tristate_value(sym))
+ continue;
+ break;
+ default:
+ if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
+ continue;
+ break;
+ }
+ } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
+ /* no previous value and not saved */
+ continue;
+ conf_unsaved++;
+ /* maybe print value in verbose mode... */
+ }
+
+ for_all_symbols(i, sym) {
+ if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
+ /* Reset values of generates values, so they'll appear
+ * as new, if they should become visible, but that
+ * doesn't quite work if the Kconfig and the saved
+ * configuration disagree.
+ */
+ if (sym->visible == no && !conf_unsaved)
+ sym->flags &= ~SYMBOL_DEF_USER;
+ switch (sym->type) {
+ case S_STRING:
+ case S_INT:
+ case S_HEX:
+ /* Reset a string value if it's out of range */
+ if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
+ break;
+ sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
+ conf_unsaved++;
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ if (conf_warnings || conf_unsaved)
+ conf_set_changed(true);
+
+ return 0;
+}
+
+struct comment_style {
+ const char *decoration;
+ const char *prefix;
+ const char *postfix;
+};
+
+static const struct comment_style comment_style_pound = {
+ .decoration = "#",
+ .prefix = "#",
+ .postfix = "#",
+};
+
+static const struct comment_style comment_style_c = {
+ .decoration = " *",
+ .prefix = "/*",
+ .postfix = " */",
+};
+
+static void conf_write_heading(FILE *fp, const struct comment_style *cs)
+{
+ if (!cs)
+ return;
+
+ fprintf(fp, "%s\n", cs->prefix);
+
+ fprintf(fp, "%s Automatically generated file; DO NOT EDIT.\n",
+ cs->decoration);
+
+ fprintf(fp, "%s %s\n", cs->decoration, rootmenu.prompt->text);
+
+ fprintf(fp, "%s\n", cs->postfix);
+}
+
+/* The returned pointer must be freed on the caller side */
+static char *escape_string_value(const char *in)
+{
+ const char *p;
+ char *out;
+ size_t len;
+
+ len = strlen(in) + strlen("\"\"") + 1;
+
+ p = in;
+ while (1) {
+ p += strcspn(p, "\"\\");
+
+ if (p[0] == '\0')
+ break;
+
+ len++;
+ p++;
+ }
+
+ out = xmalloc(len);
+ out[0] = '\0';
+
+ strcat(out, "\"");
+
+ p = in;
+ while (1) {
+ len = strcspn(p, "\"\\");
+ strncat(out, p, len);
+ p += len;
+
+ if (p[0] == '\0')
+ break;
+
+ strcat(out, "\\");
+ strncat(out, p++, 1);
+ }
+
+ strcat(out, "\"");
+
+ return out;
+}
+
+/*
+ * Kconfig configuration printer
+ *
+ * This printer is used when generating the resulting configuration after
+ * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
+ * passing a non-NULL argument to the printer.
+ */
+enum output_n { OUTPUT_N, OUTPUT_N_AS_UNSET, OUTPUT_N_NONE };
+
+static void __print_symbol(FILE *fp, struct symbol *sym, enum output_n output_n,
+ bool escape_string)
+{
+ const char *val;
+ char *escaped = NULL;
+
+ if (sym->type == S_UNKNOWN)
+ return;
+
+ val = sym_get_string_value(sym);
+
+ if ((sym->type == S_BOOLEAN || sym->type == S_TRISTATE) &&
+ output_n != OUTPUT_N && *val == 'n') {
+ if (output_n == OUTPUT_N_AS_UNSET)
+ fprintf(fp, "# %s%s is not set\n", CONFIG_, sym->name);
+ return;
+ }
+
+ if (sym->type == S_STRING && escape_string) {
+ escaped = escape_string_value(val);
+ val = escaped;
+ }
+
+ fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, val);
+
+ free(escaped);
+}
+
+static void print_symbol_for_dotconfig(FILE *fp, struct symbol *sym)
+{
+ __print_symbol(fp, sym, OUTPUT_N_AS_UNSET, true);
+}
+
+static void print_symbol_for_autoconf(FILE *fp, struct symbol *sym)
+{
+ __print_symbol(fp, sym, OUTPUT_N_NONE, false);
+}
+
+void print_symbol_for_listconfig(struct symbol *sym)
+{
+ __print_symbol(stdout, sym, OUTPUT_N, true);
+}
+
+static void print_symbol_for_c(FILE *fp, struct symbol *sym)
+{
+ const char *val;
+ const char *sym_suffix = "";
+ const char *val_prefix = "";
+ char *escaped = NULL;
+
+ if (sym->type == S_UNKNOWN)
+ return;
+
+ val = sym_get_string_value(sym);
+
+ switch (sym->type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ switch (*val) {
+ case 'n':
+ return;
+ case 'm':
+ sym_suffix = "_MODULE";
+ /* fall through */
+ default:
+ val = "1";
+ }
+ break;
+ case S_HEX:
+ if (val[0] != '0' || (val[1] != 'x' && val[1] != 'X'))
+ val_prefix = "0x";
+ break;
+ case S_STRING:
+ escaped = escape_string_value(val);
+ val = escaped;
+ default:
+ break;
+ }
+
+ fprintf(fp, "#define %s%s%s %s%s\n", CONFIG_, sym->name, sym_suffix,
+ val_prefix, val);
+
+ free(escaped);
+}
+
+static void print_symbol_for_rustccfg(FILE *fp, struct symbol *sym)
+{
+ const char *val;
+ const char *val_prefix = "";
+ char *val_prefixed = NULL;
+ size_t val_prefixed_len;
+ char *escaped = NULL;
+
+ if (sym->type == S_UNKNOWN)
+ return;
+
+ val = sym_get_string_value(sym);
+
+ switch (sym->type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ /*
+ * We do not care about disabled ones, i.e. no need for
+ * what otherwise are "comments" in other printers.
+ */
+ if (*val == 'n')
+ return;
+
+ /*
+ * To have similar functionality to the C macro `IS_ENABLED()`
+ * we provide an empty `--cfg CONFIG_X` here in both `y`
+ * and `m` cases.
+ *
+ * Then, the common `fprintf()` below will also give us
+ * a `--cfg CONFIG_X="y"` or `--cfg CONFIG_X="m"`, which can
+ * be used as the equivalent of `IS_BUILTIN()`/`IS_MODULE()`.
+ */
+ fprintf(fp, "--cfg=%s%s\n", CONFIG_, sym->name);
+ break;
+ case S_HEX:
+ if (val[0] != '0' || (val[1] != 'x' && val[1] != 'X'))
+ val_prefix = "0x";
+ break;
+ default:
+ break;
+ }
+
+ if (strlen(val_prefix) > 0) {
+ val_prefixed_len = strlen(val) + strlen(val_prefix) + 1;
+ val_prefixed = xmalloc(val_prefixed_len);
+ snprintf(val_prefixed, val_prefixed_len, "%s%s", val_prefix, val);
+ val = val_prefixed;
+ }
+
+ /* All values get escaped: the `--cfg` option only takes strings */
+ escaped = escape_string_value(val);
+ val = escaped;
+
+ fprintf(fp, "--cfg=%s%s=%s\n", CONFIG_, sym->name, val);
+
+ free(escaped);
+ free(val_prefixed);
+}
+
+/*
+ * Write out a minimal config.
+ * All values that has default values are skipped as this is redundant.
+ */
+int conf_write_defconfig(const char *filename)
+{
+ struct symbol *sym;
+ struct menu *menu;
+ FILE *out;
+
+ out = fopen(filename, "w");
+ if (!out)
+ return 1;
+
+ sym_clear_all_valid();
+
+ /* Traverse all menus to find all relevant symbols */
+ menu = rootmenu.list;
+
+ while (menu != NULL)
+ {
+ sym = menu->sym;
+ if (sym == NULL) {
+ if (!menu_is_visible(menu))
+ goto next_menu;
+ } else if (!sym_is_choice(sym)) {
+ sym_calc_value(sym);
+ if (!(sym->flags & SYMBOL_WRITE))
+ goto next_menu;
+ sym->flags &= ~SYMBOL_WRITE;
+ /* If we cannot change the symbol - skip */
+ if (!sym_is_changeable(sym))
+ goto next_menu;
+ /* If symbol equals to default value - skip */
+ if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
+ goto next_menu;
+
+ /*
+ * If symbol is a choice value and equals to the
+ * default for a choice - skip.
+ * But only if value is bool and equal to "y" and
+ * choice is not "optional".
+ * (If choice is "optional" then all values can be "n")
+ */
+ if (sym_is_choice_value(sym)) {
+ struct symbol *cs;
+ struct symbol *ds;
+
+ cs = prop_get_symbol(sym_get_choice_prop(sym));
+ ds = sym_choice_default(cs);
+ if (!sym_is_optional(cs) && sym == ds) {
+ if ((sym->type == S_BOOLEAN) &&
+ sym_get_tristate_value(sym) == yes)
+ goto next_menu;
+ }
+ }
+ print_symbol_for_dotconfig(out, sym);
+ }
+next_menu:
+ if (menu->list != NULL) {
+ menu = menu->list;
+ }
+ else if (menu->next != NULL) {
+ menu = menu->next;
+ } else {
+ while ((menu = menu->parent)) {
+ if (menu->next != NULL) {
+ menu = menu->next;
+ break;
+ }
+ }
+ }
+ }
+ fclose(out);
+ return 0;
+}
+
+int conf_write(const char *name)
+{
+ FILE *out;
+ struct symbol *sym;
+ struct menu *menu;
+ const char *str;
+ char tmpname[PATH_MAX + 1], oldname[PATH_MAX + 1];
+ char *env;
+ int i;
+ bool need_newline = false;
+
+ if (!name)
+ name = conf_get_configname();
+
+ if (!*name) {
+ fprintf(stderr, "config name is empty\n");
+ return -1;
+ }
+
+ if (is_dir(name)) {
+ fprintf(stderr, "%s: Is a directory\n", name);
+ return -1;
+ }
+
+ if (make_parent_dir(name))
+ return -1;
+
+ env = getenv("KCONFIG_OVERWRITECONFIG");
+ if (env && *env) {
+ *tmpname = 0;
+ out = fopen(name, "w");
+ } else {
+ snprintf(tmpname, sizeof(tmpname), "%s.%d.tmp",
+ name, (int)getpid());
+ out = fopen(tmpname, "w");
+ }
+ if (!out)
+ return 1;
+
+ conf_write_heading(out, &comment_style_pound);
+
+ if (!conf_get_changed())
+ sym_clear_all_valid();
+
+ menu = rootmenu.list;
+ while (menu) {
+ sym = menu->sym;
+ if (!sym) {
+ if (!menu_is_visible(menu))
+ goto next;
+ str = menu_get_prompt(menu);
+ fprintf(out, "\n"
+ "#\n"
+ "# %s\n"
+ "#\n", str);
+ need_newline = false;
+ } else if (!(sym->flags & SYMBOL_CHOICE) &&
+ !(sym->flags & SYMBOL_WRITTEN)) {
+ sym_calc_value(sym);
+ if (!(sym->flags & SYMBOL_WRITE))
+ goto next;
+ if (need_newline) {
+ fprintf(out, "\n");
+ need_newline = false;
+ }
+ sym->flags |= SYMBOL_WRITTEN;
+ print_symbol_for_dotconfig(out, sym);
+ }
+
+next:
+ if (menu->list) {
+ menu = menu->list;
+ continue;
+ }
+ if (menu->next)
+ menu = menu->next;
+ else while ((menu = menu->parent)) {
+ if (!menu->sym && menu_is_visible(menu) &&
+ menu != &rootmenu) {
+ str = menu_get_prompt(menu);
+ fprintf(out, "# end of %s\n", str);
+ need_newline = true;
+ }
+ if (menu->next) {
+ menu = menu->next;
+ break;
+ }
+ }
+ }
+ fclose(out);
+
+ for_all_symbols(i, sym)
+ sym->flags &= ~SYMBOL_WRITTEN;
+
+ if (*tmpname) {
+ if (is_same(name, tmpname)) {
+ conf_message("No change to %s", name);
+ unlink(tmpname);
+ conf_set_changed(false);
+ return 0;
+ }
+
+ snprintf(oldname, sizeof(oldname), "%s.old", name);
+ rename(name, oldname);
+ if (rename(tmpname, name))
+ return 1;
+ }
+
+ conf_message("configuration written to %s", name);
+
+ conf_set_changed(false);
+
+ return 0;
+}
+
+/* write a dependency file as used by kbuild to track dependencies */
+static int conf_write_autoconf_cmd(const char *autoconf_name)
+{
+ char name[PATH_MAX], tmp[PATH_MAX];
+ struct file *file;
+ FILE *out;
+ int ret;
+
+ ret = snprintf(name, sizeof(name), "%s.cmd", autoconf_name);
+ if (ret >= sizeof(name)) /* check truncation */
+ return -1;
+
+ if (make_parent_dir(name))
+ return -1;
+
+ ret = snprintf(tmp, sizeof(tmp), "%s.cmd.tmp", autoconf_name);
+ if (ret >= sizeof(tmp)) /* check truncation */
+ return -1;
+
+ out = fopen(tmp, "w");
+ if (!out) {
+ perror("fopen");
+ return -1;
+ }
+
+ fprintf(out, "deps_config := \\\n");
+ for (file = file_list; file; file = file->next)
+ fprintf(out, "\t%s \\\n", file->name);
+
+ fprintf(out, "\n%s: $(deps_config)\n\n", autoconf_name);
+
+ env_write_dep(out, autoconf_name);
+
+ fprintf(out, "\n$(deps_config): ;\n");
+
+ if (ferror(out)) /* error check for all fprintf() calls */
+ return -1;
+
+ fclose(out);
+
+ if (rename(tmp, name)) {
+ perror("rename");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int conf_touch_deps(void)
+{
+ const char *name;
+ struct symbol *sym;
+ int res, i;
+
+ strcpy(depfile_path, "include/config/");
+ depfile_prefix_len = strlen(depfile_path);
+
+ name = conf_get_autoconfig_name();
+ conf_read_simple(name, S_DEF_AUTO);
+ sym_calc_value(modules_sym);
+
+ for_all_symbols(i, sym) {
+ sym_calc_value(sym);
+ if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name)
+ continue;
+ if (sym->flags & SYMBOL_WRITE) {
+ if (sym->flags & SYMBOL_DEF_AUTO) {
+ /*
+ * symbol has old and new value,
+ * so compare them...
+ */
+ switch (sym->type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ if (sym_get_tristate_value(sym) ==
+ sym->def[S_DEF_AUTO].tri)
+ continue;
+ break;
+ case S_STRING:
+ case S_HEX:
+ case S_INT:
+ if (!strcmp(sym_get_string_value(sym),
+ sym->def[S_DEF_AUTO].val))
+ continue;
+ break;
+ default:
+ break;
+ }
+ } else {
+ /*
+ * If there is no old value, only 'no' (unset)
+ * is allowed as new value.
+ */
+ switch (sym->type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ if (sym_get_tristate_value(sym) == no)
+ continue;
+ break;
+ default:
+ break;
+ }
+ }
+ } else if (!(sym->flags & SYMBOL_DEF_AUTO))
+ /* There is neither an old nor a new value. */
+ continue;
+ /* else
+ * There is an old value, but no new value ('no' (unset)
+ * isn't saved in auto.conf, so the old value is always
+ * different from 'no').
+ */
+
+ res = conf_touch_dep(sym->name);
+ if (res)
+ return res;
+ }
+
+ return 0;
+}
+
+static int __conf_write_autoconf(const char *filename,
+ void (*print_symbol)(FILE *, struct symbol *),
+ const struct comment_style *comment_style)
+{
+ char tmp[PATH_MAX];
+ FILE *file;
+ struct symbol *sym;
+ int ret, i;
+
+ if (make_parent_dir(filename))
+ return -1;
+
+ ret = snprintf(tmp, sizeof(tmp), "%s.tmp", filename);
+ if (ret >= sizeof(tmp)) /* check truncation */
+ return -1;
+
+ file = fopen(tmp, "w");
+ if (!file) {
+ perror("fopen");
+ return -1;
+ }
+
+ conf_write_heading(file, comment_style);
+
+ for_all_symbols(i, sym)
+ if ((sym->flags & SYMBOL_WRITE) && sym->name)
+ print_symbol(file, sym);
+
+ /* check possible errors in conf_write_heading() and print_symbol() */
+ if (ferror(file))
+ return -1;
+
+ fclose(file);
+
+ if (rename(tmp, filename)) {
+ perror("rename");
+ return -1;
+ }
+
+ return 0;
+}
+
+int conf_write_autoconf(int overwrite)
+{
+ struct symbol *sym;
+ const char *autoconf_name = conf_get_autoconfig_name();
+ int ret, i;
+
+ if (!overwrite && is_present(autoconf_name))
+ return 0;
+
+ ret = conf_write_autoconf_cmd(autoconf_name);
+ if (ret)
+ return -1;
+
+ if (conf_touch_deps())
+ return 1;
+
+ for_all_symbols(i, sym)
+ sym_calc_value(sym);
+
+ ret = __conf_write_autoconf(conf_get_autoheader_name(),
+ print_symbol_for_c,
+ &comment_style_c);
+ if (ret)
+ return ret;
+
+ ret = __conf_write_autoconf(conf_get_rustccfg_name(),
+ print_symbol_for_rustccfg,
+ NULL);
+ if (ret)
+ return ret;
+
+ /*
+ * Create include/config/auto.conf. This must be the last step because
+ * Kbuild has a dependency on auto.conf and this marks the successful
+ * completion of the previous steps.
+ */
+ ret = __conf_write_autoconf(conf_get_autoconfig_name(),
+ print_symbol_for_autoconf,
+ &comment_style_pound);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static bool conf_changed;
+static void (*conf_changed_callback)(void);
+
+void conf_set_changed(bool val)
+{
+ if (conf_changed_callback && conf_changed != val)
+ conf_changed_callback();
+
+ conf_changed = val;
+}
+
+bool conf_get_changed(void)
+{
+ return conf_changed;
+}
+
+void conf_set_changed_callback(void (*fn)(void))
+{
+ conf_changed_callback = fn;
+}
+
+void set_all_choice_values(struct symbol *csym)
+{
+ struct property *prop;
+ struct symbol *sym;
+ struct expr *e;
+
+ prop = sym_get_choice_prop(csym);
+
+ /*
+ * Set all non-assinged choice values to no
+ */
+ expr_list_for_each_sym(prop->expr, e, sym) {
+ if (!sym_has_value(sym))
+ sym->def[S_DEF_USER].tri = no;
+ }
+ csym->flags |= SYMBOL_DEF_USER;
+ /* clear VALID to get value calculated */
+ csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
+}
diff --git a/backport/kconf/expr.c b/backport/kconf/expr.c
new file mode 100644
index 000000000000..81ebf8108ca7
--- /dev/null
+++ b/backport/kconf/expr.c
@@ -0,0 +1,1303 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lkc.h"
+
+#define DEBUG_EXPR 0
+
+static struct expr *expr_eliminate_yn(struct expr *e);
+
+struct expr *expr_alloc_symbol(struct symbol *sym)
+{
+ struct expr *e = xcalloc(1, sizeof(*e));
+ e->type = E_SYMBOL;
+ e->left.sym = sym;
+ return e;
+}
+
+struct expr *expr_alloc_one(enum expr_type type, struct expr *ce)
+{
+ struct expr *e = xcalloc(1, sizeof(*e));
+ e->type = type;
+ e->left.expr = ce;
+ return e;
+}
+
+struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2)
+{
+ struct expr *e = xcalloc(1, sizeof(*e));
+ e->type = type;
+ e->left.expr = e1;
+ e->right.expr = e2;
+ return e;
+}
+
+struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2)
+{
+ struct expr *e = xcalloc(1, sizeof(*e));
+ e->type = type;
+ e->left.sym = s1;
+ e->right.sym = s2;
+ return e;
+}
+
+struct expr *expr_alloc_and(struct expr *e1, struct expr *e2)
+{
+ if (!e1)
+ return e2;
+ return e2 ? expr_alloc_two(E_AND, e1, e2) : e1;
+}
+
+struct expr *expr_alloc_or(struct expr *e1, struct expr *e2)
+{
+ if (!e1)
+ return e2;
+ return e2 ? expr_alloc_two(E_OR, e1, e2) : e1;
+}
+
+struct expr *expr_copy(const struct expr *org)
+{
+ struct expr *e;
+
+ if (!org)
+ return NULL;
+
+ e = xmalloc(sizeof(*org));
+ memcpy(e, org, sizeof(*org));
+ switch (org->type) {
+ case E_SYMBOL:
+ e->left = org->left;
+ break;
+ case E_NOT:
+ e->left.expr = expr_copy(org->left.expr);
+ break;
+ case E_EQUAL:
+ case E_GEQ:
+ case E_GTH:
+ case E_LEQ:
+ case E_LTH:
+ case E_UNEQUAL:
+ e->left.sym = org->left.sym;
+ e->right.sym = org->right.sym;
+ break;
+ case E_AND:
+ case E_OR:
+ case E_LIST:
+ e->left.expr = expr_copy(org->left.expr);
+ e->right.expr = expr_copy(org->right.expr);
+ break;
+ default:
+ fprintf(stderr, "can't copy type %d\n", e->type);
+ free(e);
+ e = NULL;
+ break;
+ }
+
+ return e;
+}
+
+void expr_free(struct expr *e)
+{
+ if (!e)
+ return;
+
+ switch (e->type) {
+ case E_SYMBOL:
+ break;
+ case E_NOT:
+ expr_free(e->left.expr);
+ break;
+ case E_EQUAL:
+ case E_GEQ:
+ case E_GTH:
+ case E_LEQ:
+ case E_LTH:
+ case E_UNEQUAL:
+ break;
+ case E_OR:
+ case E_AND:
+ expr_free(e->left.expr);
+ expr_free(e->right.expr);
+ break;
+ default:
+ fprintf(stderr, "how to free type %d?\n", e->type);
+ break;
+ }
+ free(e);
+}
+
+static int trans_count;
+
+#define e1 (*ep1)
+#define e2 (*ep2)
+
+/*
+ * expr_eliminate_eq() helper.
+ *
+ * Walks the two expression trees given in 'ep1' and 'ep2'. Any node that does
+ * not have type 'type' (E_OR/E_AND) is considered a leaf, and is compared
+ * against all other leaves. Two equal leaves are both replaced with either 'y'
+ * or 'n' as appropriate for 'type', to be eliminated later.
+ */
+static void __expr_eliminate_eq(enum expr_type type, struct expr **ep1, struct expr **ep2)
+{
+ /* Recurse down to leaves */
+
+ if (e1->type == type) {
+ __expr_eliminate_eq(type, &e1->left.expr, &e2);
+ __expr_eliminate_eq(type, &e1->right.expr, &e2);
+ return;
+ }
+ if (e2->type == type) {
+ __expr_eliminate_eq(type, &e1, &e2->left.expr);
+ __expr_eliminate_eq(type, &e1, &e2->right.expr);
+ return;
+ }
+
+ /* e1 and e2 are leaves. Compare them. */
+
+ if (e1->type == E_SYMBOL && e2->type == E_SYMBOL &&
+ e1->left.sym == e2->left.sym &&
+ (e1->left.sym == &symbol_yes || e1->left.sym == &symbol_no))
+ return;
+ if (!expr_eq(e1, e2))
+ return;
+
+ /* e1 and e2 are equal leaves. Prepare them for elimination. */
+
+ trans_count++;
+ expr_free(e1); expr_free(e2);
+ switch (type) {
+ case E_OR:
+ e1 = expr_alloc_symbol(&symbol_no);
+ e2 = expr_alloc_symbol(&symbol_no);
+ break;
+ case E_AND:
+ e1 = expr_alloc_symbol(&symbol_yes);
+ e2 = expr_alloc_symbol(&symbol_yes);
+ break;
+ default:
+ ;
+ }
+}
+
+/*
+ * Rewrites the expressions 'ep1' and 'ep2' to remove operands common to both.
+ * Example reductions:
+ *
+ * ep1: A && B -> ep1: y
+ * ep2: A && B && C -> ep2: C
+ *
+ * ep1: A || B -> ep1: n
+ * ep2: A || B || C -> ep2: C
+ *
+ * ep1: A && (B && FOO) -> ep1: FOO
+ * ep2: (BAR && B) && A -> ep2: BAR
+ *
+ * ep1: A && (B || C) -> ep1: y
+ * ep2: (C || B) && A -> ep2: y
+ *
+ * Comparisons are done between all operands at the same "level" of && or ||.
+ * For example, in the expression 'e1 && (e2 || e3) && (e4 || e5)', the
+ * following operands will be compared:
+ *
+ * - 'e1', 'e2 || e3', and 'e4 || e5', against each other
+ * - e2 against e3
+ * - e4 against e5
+ *
+ * Parentheses are irrelevant within a single level. 'e1 && (e2 && e3)' and
+ * '(e1 && e2) && e3' are both a single level.
+ *
+ * See __expr_eliminate_eq() as well.
+ */
+void expr_eliminate_eq(struct expr **ep1, struct expr **ep2)
+{
+ if (!e1 || !e2)
+ return;
+ switch (e1->type) {
+ case E_OR:
+ case E_AND:
+ __expr_eliminate_eq(e1->type, ep1, ep2);
+ default:
+ ;
+ }
+ if (e1->type != e2->type) switch (e2->type) {
+ case E_OR:
+ case E_AND:
+ __expr_eliminate_eq(e2->type, ep1, ep2);
+ default:
+ ;
+ }
+ e1 = expr_eliminate_yn(e1);
+ e2 = expr_eliminate_yn(e2);
+}
+
+#undef e1
+#undef e2
+
+/*
+ * Returns true if 'e1' and 'e2' are equal, after minor simplification. Two
+ * &&/|| expressions are considered equal if every operand in one expression
+ * equals some operand in the other (operands do not need to appear in the same
+ * order), recursively.
+ */
+int expr_eq(struct expr *e1, struct expr *e2)
+{
+ int res, old_count;
+
+ /*
+ * A NULL expr is taken to be yes, but there's also a different way to
+ * represent yes. expr_is_yes() checks for either representation.
+ */
+ if (!e1 || !e2)
+ return expr_is_yes(e1) && expr_is_yes(e2);
+
+ if (e1->type != e2->type)
+ return 0;
+ switch (e1->type) {
+ case E_EQUAL:
+ case E_GEQ:
+ case E_GTH:
+ case E_LEQ:
+ case E_LTH:
+ case E_UNEQUAL:
+ return e1->left.sym == e2->left.sym && e1->right.sym == e2->right.sym;
+ case E_SYMBOL:
+ return e1->left.sym == e2->left.sym;
+ case E_NOT:
+ return expr_eq(e1->left.expr, e2->left.expr);
+ case E_AND:
+ case E_OR:
+ e1 = expr_copy(e1);
+ e2 = expr_copy(e2);
+ old_count = trans_count;
+ expr_eliminate_eq(&e1, &e2);
+ res = (e1->type == E_SYMBOL && e2->type == E_SYMBOL &&
+ e1->left.sym == e2->left.sym);
+ expr_free(e1);
+ expr_free(e2);
+ trans_count = old_count;
+ return res;
+ case E_LIST:
+ case E_RANGE:
+ case E_NONE:
+ /* panic */;
+ }
+
+ if (DEBUG_EXPR) {
+ expr_fprint(e1, stdout);
+ printf(" = ");
+ expr_fprint(e2, stdout);
+ printf(" ?\n");
+ }
+
+ return 0;
+}
+
+/*
+ * Recursively performs the following simplifications in-place (as well as the
+ * corresponding simplifications with swapped operands):
+ *
+ * expr && n -> n
+ * expr && y -> expr
+ * expr || n -> expr
+ * expr || y -> y
+ *
+ * Returns the optimized expression.
+ */
+static struct expr *expr_eliminate_yn(struct expr *e)
+{
+ struct expr *tmp;
+
+ if (e) switch (e->type) {
+ case E_AND:
+ e->left.expr = expr_eliminate_yn(e->left.expr);
+ e->right.expr = expr_eliminate_yn(e->right.expr);
+ if (e->left.expr->type == E_SYMBOL) {
+ if (e->left.expr->left.sym == &symbol_no) {
+ expr_free(e->left.expr);
+ expr_free(e->right.expr);
+ e->type = E_SYMBOL;
+ e->left.sym = &symbol_no;
+ e->right.expr = NULL;
+ return e;
+ } else if (e->left.expr->left.sym == &symbol_yes) {
+ free(e->left.expr);
+ tmp = e->right.expr;
+ *e = *(e->right.expr);
+ free(tmp);
+ return e;
+ }
+ }
+ if (e->right.expr->type == E_SYMBOL) {
+ if (e->right.expr->left.sym == &symbol_no) {
+ expr_free(e->left.expr);
+ expr_free(e->right.expr);
+ e->type = E_SYMBOL;
+ e->left.sym = &symbol_no;
+ e->right.expr = NULL;
+ return e;
+ } else if (e->right.expr->left.sym == &symbol_yes) {
+ free(e->right.expr);
+ tmp = e->left.expr;
+ *e = *(e->left.expr);
+ free(tmp);
+ return e;
+ }
+ }
+ break;
+ case E_OR:
+ e->left.expr = expr_eliminate_yn(e->left.expr);
+ e->right.expr = expr_eliminate_yn(e->right.expr);
+ if (e->left.expr->type == E_SYMBOL) {
+ if (e->left.expr->left.sym == &symbol_no) {
+ free(e->left.expr);
+ tmp = e->right.expr;
+ *e = *(e->right.expr);
+ free(tmp);
+ return e;
+ } else if (e->left.expr->left.sym == &symbol_yes) {
+ expr_free(e->left.expr);
+ expr_free(e->right.expr);
+ e->type = E_SYMBOL;
+ e->left.sym = &symbol_yes;
+ e->right.expr = NULL;
+ return e;
+ }
+ }
+ if (e->right.expr->type == E_SYMBOL) {
+ if (e->right.expr->left.sym == &symbol_no) {
+ free(e->right.expr);
+ tmp = e->left.expr;
+ *e = *(e->left.expr);
+ free(tmp);
+ return e;
+ } else if (e->right.expr->left.sym == &symbol_yes) {
+ expr_free(e->left.expr);
+ expr_free(e->right.expr);
+ e->type = E_SYMBOL;
+ e->left.sym = &symbol_yes;
+ e->right.expr = NULL;
+ return e;
+ }
+ }
+ break;
+ default:
+ ;
+ }
+ return e;
+}
+
+/*
+ * bool FOO!=n => FOO
+ */
+struct expr *expr_trans_bool(struct expr *e)
+{
+ if (!e)
+ return NULL;
+ switch (e->type) {
+ case E_AND:
+ case E_OR:
+ case E_NOT:
+ e->left.expr = expr_trans_bool(e->left.expr);
+ e->right.expr = expr_trans_bool(e->right.expr);
+ break;
+ case E_UNEQUAL:
+ // FOO!=n -> FOO
+ if (e->left.sym->type == S_TRISTATE) {
+ if (e->right.sym == &symbol_no) {
+ e->type = E_SYMBOL;
+ e->right.sym = NULL;
+ }
+ }
+ break;
+ default:
+ ;
+ }
+ return e;
+}
+
+/*
+ * e1 || e2 -> ?
+ */
+static struct expr *expr_join_or(struct expr *e1, struct expr *e2)
+{
+ struct expr *tmp;
+ struct symbol *sym1, *sym2;
+
+ if (expr_eq(e1, e2))
+ return expr_copy(e1);
+ if (e1->type != E_EQUAL && e1->type != E_UNEQUAL && e1->type != E_SYMBOL && e1->type != E_NOT)
+ return NULL;
+ if (e2->type != E_EQUAL && e2->type != E_UNEQUAL && e2->type != E_SYMBOL && e2->type != E_NOT)
+ return NULL;
+ if (e1->type == E_NOT) {
+ tmp = e1->left.expr;
+ if (tmp->type != E_EQUAL && tmp->type != E_UNEQUAL && tmp->type != E_SYMBOL)
+ return NULL;
+ sym1 = tmp->left.sym;
+ } else
+ sym1 = e1->left.sym;
+ if (e2->type == E_NOT) {
+ if (e2->left.expr->type != E_SYMBOL)
+ return NULL;
+ sym2 = e2->left.expr->left.sym;
+ } else
+ sym2 = e2->left.sym;
+ if (sym1 != sym2)
+ return NULL;
+ if (sym1->type != S_BOOLEAN && sym1->type != S_TRISTATE)
+ return NULL;
+ if (sym1->type == S_TRISTATE) {
+ if (e1->type == E_EQUAL && e2->type == E_EQUAL &&
+ ((e1->right.sym == &symbol_yes && e2->right.sym == &symbol_mod) ||
+ (e1->right.sym == &symbol_mod && e2->right.sym == &symbol_yes))) {
+ // (a='y') || (a='m') -> (a!='n')
+ return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_no);
+ }
+ if (e1->type == E_EQUAL && e2->type == E_EQUAL &&
+ ((e1->right.sym == &symbol_yes && e2->right.sym == &symbol_no) ||
+ (e1->right.sym == &symbol_no && e2->right.sym == &symbol_yes))) {
+ // (a='y') || (a='n') -> (a!='m')
+ return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_mod);
+ }
+ if (e1->type == E_EQUAL && e2->type == E_EQUAL &&
+ ((e1->right.sym == &symbol_mod && e2->right.sym == &symbol_no) ||
+ (e1->right.sym == &symbol_no && e2->right.sym == &symbol_mod))) {
+ // (a='m') || (a='n') -> (a!='y')
+ return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_yes);
+ }
+ }
+ if (sym1->type == S_BOOLEAN && sym1 == sym2) {
+ if ((e1->type == E_NOT && e1->left.expr->type == E_SYMBOL && e2->type == E_SYMBOL) ||
+ (e2->type == E_NOT && e2->left.expr->type == E_SYMBOL && e1->type == E_SYMBOL))
+ return expr_alloc_symbol(&symbol_yes);
+ }
+
+ if (DEBUG_EXPR) {
+ printf("optimize (");
+ expr_fprint(e1, stdout);
+ printf(") || (");
+ expr_fprint(e2, stdout);
+ printf(")?\n");
+ }
+ return NULL;
+}
+
+static struct expr *expr_join_and(struct expr *e1, struct expr *e2)
+{
+ struct expr *tmp;
+ struct symbol *sym1, *sym2;
+
+ if (expr_eq(e1, e2))
+ return expr_copy(e1);
+ if (e1->type != E_EQUAL && e1->type != E_UNEQUAL && e1->type != E_SYMBOL && e1->type != E_NOT)
+ return NULL;
+ if (e2->type != E_EQUAL && e2->type != E_UNEQUAL && e2->type != E_SYMBOL && e2->type != E_NOT)
+ return NULL;
+ if (e1->type == E_NOT) {
+ tmp = e1->left.expr;
+ if (tmp->type != E_EQUAL && tmp->type != E_UNEQUAL && tmp->type != E_SYMBOL)
+ return NULL;
+ sym1 = tmp->left.sym;
+ } else
+ sym1 = e1->left.sym;
+ if (e2->type == E_NOT) {
+ if (e2->left.expr->type != E_SYMBOL)
+ return NULL;
+ sym2 = e2->left.expr->left.sym;
+ } else
+ sym2 = e2->left.sym;
+ if (sym1 != sym2)
+ return NULL;
+ if (sym1->type != S_BOOLEAN && sym1->type != S_TRISTATE)
+ return NULL;
+
+ if ((e1->type == E_SYMBOL && e2->type == E_EQUAL && e2->right.sym == &symbol_yes) ||
+ (e2->type == E_SYMBOL && e1->type == E_EQUAL && e1->right.sym == &symbol_yes))
+ // (a) && (a='y') -> (a='y')
+ return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);
+
+ if ((e1->type == E_SYMBOL && e2->type == E_UNEQUAL && e2->right.sym == &symbol_no) ||
+ (e2->type == E_SYMBOL && e1->type == E_UNEQUAL && e1->right.sym == &symbol_no))
+ // (a) && (a!='n') -> (a)
+ return expr_alloc_symbol(sym1);
+
+ if ((e1->type == E_SYMBOL && e2->type == E_UNEQUAL && e2->right.sym == &symbol_mod) ||
+ (e2->type == E_SYMBOL && e1->type == E_UNEQUAL && e1->right.sym == &symbol_mod))
+ // (a) && (a!='m') -> (a='y')
+ return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);
+
+ if (sym1->type == S_TRISTATE) {
+ if (e1->type == E_EQUAL && e2->type == E_UNEQUAL) {
+ // (a='b') && (a!='c') -> 'b'='c' ? 'n' : a='b'
+ sym2 = e1->right.sym;
+ if ((e2->right.sym->flags & SYMBOL_CONST) && (sym2->flags & SYMBOL_CONST))
+ return sym2 != e2->right.sym ? expr_alloc_comp(E_EQUAL, sym1, sym2)
+ : expr_alloc_symbol(&symbol_no);
+ }
+ if (e1->type == E_UNEQUAL && e2->type == E_EQUAL) {
+ // (a='b') && (a!='c') -> 'b'='c' ? 'n' : a='b'
+ sym2 = e2->right.sym;
+ if ((e1->right.sym->flags & SYMBOL_CONST) && (sym2->flags & SYMBOL_CONST))
+ return sym2 != e1->right.sym ? expr_alloc_comp(E_EQUAL, sym1, sym2)
+ : expr_alloc_symbol(&symbol_no);
+ }
+ if (e1->type == E_UNEQUAL && e2->type == E_UNEQUAL &&
+ ((e1->right.sym == &symbol_yes && e2->right.sym == &symbol_no) ||
+ (e1->right.sym == &symbol_no && e2->right.sym == &symbol_yes)))
+ // (a!='y') && (a!='n') -> (a='m')
+ return expr_alloc_comp(E_EQUAL, sym1, &symbol_mod);
+
+ if (e1->type == E_UNEQUAL && e2->type == E_UNEQUAL &&
+ ((e1->right.sym == &symbol_yes && e2->right.sym == &symbol_mod) ||
+ (e1->right.sym == &symbol_mod && e2->right.sym == &symbol_yes)))
+ // (a!='y') && (a!='m') -> (a='n')
+ return expr_alloc_comp(E_EQUAL, sym1, &symbol_no);
+
+ if (e1->type == E_UNEQUAL && e2->type == E_UNEQUAL &&
+ ((e1->right.sym == &symbol_mod && e2->right.sym == &symbol_no) ||
+ (e1->right.sym == &symbol_no && e2->right.sym == &symbol_mod)))
+ // (a!='m') && (a!='n') -> (a='m')
+ return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);
+
+ if ((e1->type == E_SYMBOL && e2->type == E_EQUAL && e2->right.sym == &symbol_mod) ||
+ (e2->type == E_SYMBOL && e1->type == E_EQUAL && e1->right.sym == &symbol_mod) ||
+ (e1->type == E_SYMBOL && e2->type == E_UNEQUAL && e2->right.sym == &symbol_yes) ||
+ (e2->type == E_SYMBOL && e1->type == E_UNEQUAL && e1->right.sym == &symbol_yes))
+ return NULL;
+ }
+
+ if (DEBUG_EXPR) {
+ printf("optimize (");
+ expr_fprint(e1, stdout);
+ printf(") && (");
+ expr_fprint(e2, stdout);
+ printf(")?\n");
+ }
+ return NULL;
+}
+
+/*
+ * expr_eliminate_dups() helper.
+ *
+ * Walks the two expression trees given in 'ep1' and 'ep2'. Any node that does
+ * not have type 'type' (E_OR/E_AND) is considered a leaf, and is compared
+ * against all other leaves to look for simplifications.
+ */
+static void expr_eliminate_dups1(enum expr_type type, struct expr **ep1, struct expr **ep2)
+{
+#define e1 (*ep1)
+#define e2 (*ep2)
+ struct expr *tmp;
+
+ /* Recurse down to leaves */
+
+ if (e1->type == type) {
+ expr_eliminate_dups1(type, &e1->left.expr, &e2);
+ expr_eliminate_dups1(type, &e1->right.expr, &e2);
+ return;
+ }
+ if (e2->type == type) {
+ expr_eliminate_dups1(type, &e1, &e2->left.expr);
+ expr_eliminate_dups1(type, &e1, &e2->right.expr);
+ return;
+ }
+
+ /* e1 and e2 are leaves. Compare and process them. */
+
+ if (e1 == e2)
+ return;
+
+ switch (e1->type) {
+ case E_OR: case E_AND:
+ expr_eliminate_dups1(e1->type, &e1, &e1);
+ default:
+ ;
+ }
+
+ switch (type) {
+ case E_OR:
+ tmp = expr_join_or(e1, e2);
+ if (tmp) {
+ expr_free(e1); expr_free(e2);
+ e1 = expr_alloc_symbol(&symbol_no);
+ e2 = tmp;
+ trans_count++;
+ }
+ break;
+ case E_AND:
+ tmp = expr_join_and(e1, e2);
+ if (tmp) {
+ expr_free(e1); expr_free(e2);
+ e1 = expr_alloc_symbol(&symbol_yes);
+ e2 = tmp;
+ trans_count++;
+ }
+ break;
+ default:
+ ;
+ }
+#undef e1
+#undef e2
+}
+
+/*
+ * Rewrites 'e' in-place to remove ("join") duplicate and other redundant
+ * operands.
+ *
+ * Example simplifications:
+ *
+ * A || B || A -> A || B
+ * A && B && A=y -> A=y && B
+ *
+ * Returns the deduplicated expression.
+ */
+struct expr *expr_eliminate_dups(struct expr *e)
+{
+ int oldcount;
+ if (!e)
+ return e;
+
+ oldcount = trans_count;
+ while (1) {
+ trans_count = 0;
+ switch (e->type) {
+ case E_OR: case E_AND:
+ expr_eliminate_dups1(e->type, &e, &e);
+ default:
+ ;
+ }
+ if (!trans_count)
+ /* No simplifications done in this pass. We're done */
+ break;
+ e = expr_eliminate_yn(e);
+ }
+ trans_count = oldcount;
+ return e;
+}
+
+/*
+ * Performs various simplifications involving logical operators and
+ * comparisons.
+ *
+ * Allocates and returns a new expression.
+ */
+struct expr *expr_transform(struct expr *e)
+{
+ struct expr *tmp;
+
+ if (!e)
+ return NULL;
+ switch (e->type) {
+ case E_EQUAL:
+ case E_GEQ:
+ case E_GTH:
+ case E_LEQ:
+ case E_LTH:
+ case E_UNEQUAL:
+ case E_SYMBOL:
+ case E_LIST:
+ break;
+ default:
+ e->left.expr = expr_transform(e->left.expr);
+ e->right.expr = expr_transform(e->right.expr);
+ }
+
+ switch (e->type) {
+ case E_EQUAL:
+ if (e->left.sym->type != S_BOOLEAN)
+ break;
+ if (e->right.sym == &symbol_no) {
+ e->type = E_NOT;
+ e->left.expr = expr_alloc_symbol(e->left.sym);
+ e->right.sym = NULL;
+ break;
+ }
+ if (e->right.sym == &symbol_mod) {
+ printf("boolean symbol %s tested for 'm'? test forced to 'n'\n", e->left.sym->name);
+ e->type = E_SYMBOL;
+ e->left.sym = &symbol_no;
+ e->right.sym = NULL;
+ break;
+ }
+ if (e->right.sym == &symbol_yes) {
+ e->type = E_SYMBOL;
+ e->right.sym = NULL;
+ break;
+ }
+ break;
+ case E_UNEQUAL:
+ if (e->left.sym->type != S_BOOLEAN)
+ break;
+ if (e->right.sym == &symbol_no) {
+ e->type = E_SYMBOL;
+ e->right.sym = NULL;
+ break;
+ }
+ if (e->right.sym == &symbol_mod) {
+ printf("boolean symbol %s tested for 'm'? test forced to 'y'\n", e->left.sym->name);
+ e->type = E_SYMBOL;
+ e->left.sym = &symbol_yes;
+ e->right.sym = NULL;
+ break;
+ }
+ if (e->right.sym == &symbol_yes) {
+ e->type = E_NOT;
+ e->left.expr = expr_alloc_symbol(e->left.sym);
+ e->right.sym = NULL;
+ break;
+ }
+ break;
+ case E_NOT:
+ switch (e->left.expr->type) {
+ case E_NOT:
+ // !!a -> a
+ tmp = e->left.expr->left.expr;
+ free(e->left.expr);
+ free(e);
+ e = tmp;
+ e = expr_transform(e);
+ break;
+ case E_EQUAL:
+ case E_UNEQUAL:
+ // !a='x' -> a!='x'
+ tmp = e->left.expr;
+ free(e);
+ e = tmp;
+ e->type = e->type == E_EQUAL ? E_UNEQUAL : E_EQUAL;
+ break;
+ case E_LEQ:
+ case E_GEQ:
+ // !a<='x' -> a>'x'
+ tmp = e->left.expr;
+ free(e);
+ e = tmp;
+ e->type = e->type == E_LEQ ? E_GTH : E_LTH;
+ break;
+ case E_LTH:
+ case E_GTH:
+ // !a<'x' -> a>='x'
+ tmp = e->left.expr;
+ free(e);
+ e = tmp;
+ e->type = e->type == E_LTH ? E_GEQ : E_LEQ;
+ break;
+ case E_OR:
+ // !(a || b) -> !a && !b
+ tmp = e->left.expr;
+ e->type = E_AND;
+ e->right.expr = expr_alloc_one(E_NOT, tmp->right.expr);
+ tmp->type = E_NOT;
+ tmp->right.expr = NULL;
+ e = expr_transform(e);
+ break;
+ case E_AND:
+ // !(a && b) -> !a || !b
+ tmp = e->left.expr;
+ e->type = E_OR;
+ e->right.expr = expr_alloc_one(E_NOT, tmp->right.expr);
+ tmp->type = E_NOT;
+ tmp->right.expr = NULL;
+ e = expr_transform(e);
+ break;
+ case E_SYMBOL:
+ if (e->left.expr->left.sym == &symbol_yes) {
+ // !'y' -> 'n'
+ tmp = e->left.expr;
+ free(e);
+ e = tmp;
+ e->type = E_SYMBOL;
+ e->left.sym = &symbol_no;
+ break;
+ }
+ if (e->left.expr->left.sym == &symbol_mod) {
+ // !'m' -> 'm'
+ tmp = e->left.expr;
+ free(e);
+ e = tmp;
+ e->type = E_SYMBOL;
+ e->left.sym = &symbol_mod;
+ break;
+ }
+ if (e->left.expr->left.sym == &symbol_no) {
+ // !'n' -> 'y'
+ tmp = e->left.expr;
+ free(e);
+ e = tmp;
+ e->type = E_SYMBOL;
+ e->left.sym = &symbol_yes;
+ break;
+ }
+ break;
+ default:
+ ;
+ }
+ break;
+ default:
+ ;
+ }
+ return e;
+}
+
+int expr_contains_symbol(struct expr *dep, struct symbol *sym)
+{
+ if (!dep)
+ return 0;
+
+ switch (dep->type) {
+ case E_AND:
+ case E_OR:
+ return expr_contains_symbol(dep->left.expr, sym) ||
+ expr_contains_symbol(dep->right.expr, sym);
+ case E_SYMBOL:
+ return dep->left.sym == sym;
+ case E_EQUAL:
+ case E_GEQ:
+ case E_GTH:
+ case E_LEQ:
+ case E_LTH:
+ case E_UNEQUAL:
+ return dep->left.sym == sym ||
+ dep->right.sym == sym;
+ case E_NOT:
+ return expr_contains_symbol(dep->left.expr, sym);
+ default:
+ ;
+ }
+ return 0;
+}
+
+bool expr_depends_symbol(struct expr *dep, struct symbol *sym)
+{
+ if (!dep)
+ return false;
+
+ switch (dep->type) {
+ case E_AND:
+ return expr_depends_symbol(dep->left.expr, sym) ||
+ expr_depends_symbol(dep->right.expr, sym);
+ case E_SYMBOL:
+ return dep->left.sym == sym;
+ case E_EQUAL:
+ if (dep->left.sym == sym) {
+ if (dep->right.sym == &symbol_yes || dep->right.sym == &symbol_mod)
+ return true;
+ }
+ break;
+ case E_UNEQUAL:
+ if (dep->left.sym == sym) {
+ if (dep->right.sym == &symbol_no)
+ return true;
+ }
+ break;
+ default:
+ ;
+ }
+ return false;
+}
+
+/*
+ * Inserts explicit comparisons of type 'type' to symbol 'sym' into the
+ * expression 'e'.
+ *
+ * Examples transformations for type == E_UNEQUAL, sym == &symbol_no:
+ *
+ * A -> A!=n
+ * !A -> A=n
+ * A && B -> !(A=n || B=n)
+ * A || B -> !(A=n && B=n)
+ * A && (B || C) -> !(A=n || (B=n && C=n))
+ *
+ * Allocates and returns a new expression.
+ */
+struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym)
+{
+ struct expr *e1, *e2;
+
+ if (!e) {
+ e = expr_alloc_symbol(sym);
+ if (type == E_UNEQUAL)
+ e = expr_alloc_one(E_NOT, e);
+ return e;
+ }
+ switch (e->type) {
+ case E_AND:
+ e1 = expr_trans_compare(e->left.expr, E_EQUAL, sym);
+ e2 = expr_trans_compare(e->right.expr, E_EQUAL, sym);
+ if (sym == &symbol_yes)
+ e = expr_alloc_two(E_AND, e1, e2);
+ if (sym == &symbol_no)
+ e = expr_alloc_two(E_OR, e1, e2);
+ if (type == E_UNEQUAL)
+ e = expr_alloc_one(E_NOT, e);
+ return e;
+ case E_OR:
+ e1 = expr_trans_compare(e->left.expr, E_EQUAL, sym);
+ e2 = expr_trans_compare(e->right.expr, E_EQUAL, sym);
+ if (sym == &symbol_yes)
+ e = expr_alloc_two(E_OR, e1, e2);
+ if (sym == &symbol_no)
+ e = expr_alloc_two(E_AND, e1, e2);
+ if (type == E_UNEQUAL)
+ e = expr_alloc_one(E_NOT, e);
+ return e;
+ case E_NOT:
+ return expr_trans_compare(e->left.expr, type == E_EQUAL ? E_UNEQUAL : E_EQUAL, sym);
+ case E_UNEQUAL:
+ case E_LTH:
+ case E_LEQ:
+ case E_GTH:
+ case E_GEQ:
+ case E_EQUAL:
+ if (type == E_EQUAL) {
+ if (sym == &symbol_yes)
+ return expr_copy(e);
+ if (sym == &symbol_mod)
+ return expr_alloc_symbol(&symbol_no);
+ if (sym == &symbol_no)
+ return expr_alloc_one(E_NOT, expr_copy(e));
+ } else {
+ if (sym == &symbol_yes)
+ return expr_alloc_one(E_NOT, expr_copy(e));
+ if (sym == &symbol_mod)
+ return expr_alloc_symbol(&symbol_yes);
+ if (sym == &symbol_no)
+ return expr_copy(e);
+ }
+ break;
+ case E_SYMBOL:
+ return expr_alloc_comp(type, e->left.sym, sym);
+ case E_LIST:
+ case E_RANGE:
+ case E_NONE:
+ /* panic */;
+ }
+ return NULL;
+}
+
+enum string_value_kind {
+ k_string,
+ k_signed,
+ k_unsigned,
+};
+
+union string_value {
+ unsigned long long u;
+ signed long long s;
+};
+
+static enum string_value_kind expr_parse_string(const char *str,
+ enum symbol_type type,
+ union string_value *val)
+{
+ char *tail;
+ enum string_value_kind kind;
+
+ errno = 0;
+ switch (type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ val->s = !strcmp(str, "n") ? 0 :
+ !strcmp(str, "m") ? 1 :
+ !strcmp(str, "y") ? 2 : -1;
+ return k_signed;
+ case S_INT:
+ val->s = strtoll(str, &tail, 10);
+ kind = k_signed;
+ break;
+ case S_HEX:
+ val->u = strtoull(str, &tail, 16);
+ kind = k_unsigned;
+ break;
+ default:
+ val->s = strtoll(str, &tail, 0);
+ kind = k_signed;
+ break;
+ }
+ return !errno && !*tail && tail > str && isxdigit(tail[-1])
+ ? kind : k_string;
+}
+
+tristate expr_calc_value(struct expr *e)
+{
+ tristate val1, val2;
+ const char *str1, *str2;
+ enum string_value_kind k1 = k_string, k2 = k_string;
+ union string_value lval = {}, rval = {};
+ int res;
+
+ if (!e)
+ return yes;
+
+ switch (e->type) {
+ case E_SYMBOL:
+ sym_calc_value(e->left.sym);
+ return e->left.sym->curr.tri;
+ case E_AND:
+ val1 = expr_calc_value(e->left.expr);
+ val2 = expr_calc_value(e->right.expr);
+ return EXPR_AND(val1, val2);
+ case E_OR:
+ val1 = expr_calc_value(e->left.expr);
+ val2 = expr_calc_value(e->right.expr);
+ return EXPR_OR(val1, val2);
+ case E_NOT:
+ val1 = expr_calc_value(e->left.expr);
+ return EXPR_NOT(val1);
+ case E_EQUAL:
+ case E_GEQ:
+ case E_GTH:
+ case E_LEQ:
+ case E_LTH:
+ case E_UNEQUAL:
+ break;
+ default:
+ printf("expr_calc_value: %d?\n", e->type);
+ return no;
+ }
+
+ sym_calc_value(e->left.sym);
+ sym_calc_value(e->right.sym);
+ str1 = sym_get_string_value(e->left.sym);
+ str2 = sym_get_string_value(e->right.sym);
+
+ if (e->left.sym->type != S_STRING || e->right.sym->type != S_STRING) {
+ k1 = expr_parse_string(str1, e->left.sym->type, &lval);
+ k2 = expr_parse_string(str2, e->right.sym->type, &rval);
+ }
+
+ if (k1 == k_string || k2 == k_string)
+ res = strcmp(str1, str2);
+ else if (k1 == k_unsigned || k2 == k_unsigned)
+ res = (lval.u > rval.u) - (lval.u < rval.u);
+ else /* if (k1 == k_signed && k2 == k_signed) */
+ res = (lval.s > rval.s) - (lval.s < rval.s);
+
+ switch(e->type) {
+ case E_EQUAL:
+ return res ? no : yes;
+ case E_GEQ:
+ return res >= 0 ? yes : no;
+ case E_GTH:
+ return res > 0 ? yes : no;
+ case E_LEQ:
+ return res <= 0 ? yes : no;
+ case E_LTH:
+ return res < 0 ? yes : no;
+ case E_UNEQUAL:
+ return res ? yes : no;
+ default:
+ printf("expr_calc_value: relation %d?\n", e->type);
+ return no;
+ }
+}
+
+static int expr_compare_type(enum expr_type t1, enum expr_type t2)
+{
+ if (t1 == t2)
+ return 0;
+ switch (t1) {
+ case E_LEQ:
+ case E_LTH:
+ case E_GEQ:
+ case E_GTH:
+ if (t2 == E_EQUAL || t2 == E_UNEQUAL)
+ return 1;
+ case E_EQUAL:
+ case E_UNEQUAL:
+ if (t2 == E_NOT)
+ return 1;
+ case E_NOT:
+ if (t2 == E_AND)
+ return 1;
+ case E_AND:
+ if (t2 == E_OR)
+ return 1;
+ case E_OR:
+ if (t2 == E_LIST)
+ return 1;
+ case E_LIST:
+ if (t2 == 0)
+ return 1;
+ default:
+ return -1;
+ }
+ printf("[%dgt%d?]", t1, t2);
+ return 0;
+}
+
+void expr_print(struct expr *e,
+ void (*fn)(void *, struct symbol *, const char *),
+ void *data, int prevtoken)
+{
+ if (!e) {
+ fn(data, NULL, "y");
+ return;
+ }
+
+ if (expr_compare_type(prevtoken, e->type) > 0)
+ fn(data, NULL, "(");
+ switch (e->type) {
+ case E_SYMBOL:
+ if (e->left.sym->name)
+ fn(data, e->left.sym, e->left.sym->name);
+ else
+ fn(data, NULL, "<choice>");
+ break;
+ case E_NOT:
+ fn(data, NULL, "!");
+ expr_print(e->left.expr, fn, data, E_NOT);
+ break;
+ case E_EQUAL:
+ if (e->left.sym->name)
+ fn(data, e->left.sym, e->left.sym->name);
+ else
+ fn(data, NULL, "<choice>");
+ fn(data, NULL, "=");
+ fn(data, e->right.sym, e->right.sym->name);
+ break;
+ case E_LEQ:
+ case E_LTH:
+ if (e->left.sym->name)
+ fn(data, e->left.sym, e->left.sym->name);
+ else
+ fn(data, NULL, "<choice>");
+ fn(data, NULL, e->type == E_LEQ ? "<=" : "<");
+ fn(data, e->right.sym, e->right.sym->name);
+ break;
+ case E_GEQ:
+ case E_GTH:
+ if (e->left.sym->name)
+ fn(data, e->left.sym, e->left.sym->name);
+ else
+ fn(data, NULL, "<choice>");
+ fn(data, NULL, e->type == E_GEQ ? ">=" : ">");
+ fn(data, e->right.sym, e->right.sym->name);
+ break;
+ case E_UNEQUAL:
+ if (e->left.sym->name)
+ fn(data, e->left.sym, e->left.sym->name);
+ else
+ fn(data, NULL, "<choice>");
+ fn(data, NULL, "!=");
+ fn(data, e->right.sym, e->right.sym->name);
+ break;
+ case E_OR:
+ expr_print(e->left.expr, fn, data, E_OR);
+ fn(data, NULL, " || ");
+ expr_print(e->right.expr, fn, data, E_OR);
+ break;
+ case E_AND:
+ expr_print(e->left.expr, fn, data, E_AND);
+ fn(data, NULL, " && ");
+ expr_print(e->right.expr, fn, data, E_AND);
+ break;
+ case E_LIST:
+ fn(data, e->right.sym, e->right.sym->name);
+ if (e->left.expr) {
+ fn(data, NULL, " ^ ");
+ expr_print(e->left.expr, fn, data, E_LIST);
+ }
+ break;
+ case E_RANGE:
+ fn(data, NULL, "[");
+ fn(data, e->left.sym, e->left.sym->name);
+ fn(data, NULL, " ");
+ fn(data, e->right.sym, e->right.sym->name);
+ fn(data, NULL, "]");
+ break;
+ default:
+ {
+ char buf[32];
+ sprintf(buf, "<unknown type %d>", e->type);
+ fn(data, NULL, buf);
+ break;
+ }
+ }
+ if (expr_compare_type(prevtoken, e->type) > 0)
+ fn(data, NULL, ")");
+}
+
+static void expr_print_file_helper(void *data, struct symbol *sym, const char *str)
+{
+ xfwrite(str, strlen(str), 1, data);
+}
+
+void expr_fprint(struct expr *e, FILE *out)
+{
+ expr_print(e, expr_print_file_helper, out, E_NONE);
+}
+
+static void expr_print_gstr_helper(void *data, struct symbol *sym, const char *str)
+{
+ struct gstr *gs = (struct gstr*)data;
+ const char *sym_str = NULL;
+
+ if (sym)
+ sym_str = sym_get_string_value(sym);
+
+ if (gs->max_width) {
+ unsigned extra_length = strlen(str);
+ const char *last_cr = strrchr(gs->s, '\n');
+ unsigned last_line_length;
+
+ if (sym_str)
+ extra_length += 4 + strlen(sym_str);
+
+ if (!last_cr)
+ last_cr = gs->s;
+
+ last_line_length = strlen(gs->s) - (last_cr - gs->s);
+
+ if ((last_line_length + extra_length) > gs->max_width)
+ str_append(gs, "\\\n");
+ }
+
+ str_append(gs, str);
+ if (sym && sym->type != S_UNKNOWN)
+ str_printf(gs, " [=%s]", sym_str);
+}
+
+void expr_gstr_print(struct expr *e, struct gstr *gs)
+{
+ expr_print(e, expr_print_gstr_helper, gs, E_NONE);
+}
+
+/*
+ * Transform the top level "||" tokens into newlines and prepend each
+ * line with a minus. This makes expressions much easier to read.
+ * Suitable for reverse dependency expressions.
+ */
+static void expr_print_revdep(struct expr *e,
+ void (*fn)(void *, struct symbol *, const char *),
+ void *data, tristate pr_type, const char **title)
+{
+ if (e->type == E_OR) {
+ expr_print_revdep(e->left.expr, fn, data, pr_type, title);
+ expr_print_revdep(e->right.expr, fn, data, pr_type, title);
+ } else if (expr_calc_value(e) == pr_type) {
+ if (*title) {
+ fn(data, NULL, *title);
+ *title = NULL;
+ }
+
+ fn(data, NULL, " - ");
+ expr_print(e, fn, data, E_NONE);
+ fn(data, NULL, "\n");
+ }
+}
+
+void expr_gstr_print_revdep(struct expr *e, struct gstr *gs,
+ tristate pr_type, const char *title)
+{
+ expr_print_revdep(e, expr_print_gstr_helper, gs, pr_type, &title);
+}
diff --git a/backport/kconf/expr.h b/backport/kconf/expr.h
new file mode 100644
index 000000000000..9c9caca5bd5f
--- /dev/null
+++ b/backport/kconf/expr.h
@@ -0,0 +1,326 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ */
+
+#ifndef EXPR_H
+#define EXPR_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <assert.h>
+#include <stdio.h>
+#include "list.h"
+#ifndef __cplusplus
+#include <stdbool.h>
+#endif
+
+struct file {
+ struct file *next;
+ struct file *parent;
+ const char *name;
+ int lineno;
+};
+
+typedef enum tristate {
+ no, mod, yes
+} tristate;
+
+enum expr_type {
+ E_NONE, E_OR, E_AND, E_NOT,
+ E_EQUAL, E_UNEQUAL, E_LTH, E_LEQ, E_GTH, E_GEQ,
+ E_LIST, E_SYMBOL, E_RANGE
+};
+
+union expr_data {
+ struct expr *expr;
+ struct symbol *sym;
+};
+
+struct expr {
+ enum expr_type type;
+ union expr_data left, right;
+};
+
+#define EXPR_OR(dep1, dep2) (((dep1)>(dep2))?(dep1):(dep2))
+#define EXPR_AND(dep1, dep2) (((dep1)<(dep2))?(dep1):(dep2))
+#define EXPR_NOT(dep) (2-(dep))
+
+#define expr_list_for_each_sym(l, e, s) \
+ for (e = (l); e && (s = e->right.sym); e = e->left.expr)
+
+struct expr_value {
+ struct expr *expr;
+ tristate tri;
+};
+
+struct symbol_value {
+ void *val;
+ tristate tri;
+};
+
+enum symbol_type {
+ S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING
+};
+
+/* enum values are used as index to symbol.def[] */
+enum {
+ S_DEF_USER, /* main user value */
+ S_DEF_AUTO, /* values read from auto.conf */
+ S_DEF_DEF3, /* Reserved for UI usage */
+ S_DEF_DEF4, /* Reserved for UI usage */
+ S_DEF_COUNT
+};
+
+/*
+ * Represents a configuration symbol.
+ *
+ * Choices are represented as a special kind of symbol and have the
+ * SYMBOL_CHOICE bit set in 'flags'.
+ */
+struct symbol {
+ /* The next symbol in the same bucket in the symbol hash table */
+ struct symbol *next;
+
+ /* The name of the symbol, e.g. "FOO" for 'config FOO' */
+ char *name;
+
+ /* S_BOOLEAN, S_TRISTATE, ... */
+ enum symbol_type type;
+
+ /*
+ * The calculated value of the symbol. The SYMBOL_VALID bit is set in
+ * 'flags' when this is up to date. Note that this value might differ
+ * from the user value set in e.g. a .config file, due to visibility.
+ */
+ struct symbol_value curr;
+
+ /*
+ * Values for the symbol provided from outside. def[S_DEF_USER] holds
+ * the .config value.
+ */
+ struct symbol_value def[S_DEF_COUNT];
+
+ /*
+ * An upper bound on the tristate value the user can set for the symbol
+ * if it is a boolean or tristate. Calculated from prompt dependencies,
+ * which also inherit dependencies from enclosing menus, choices, and
+ * ifs. If 'n', the user value will be ignored.
+ *
+ * Symbols lacking prompts always have visibility 'n'.
+ */
+ tristate visible;
+
+ /* SYMBOL_* flags */
+ int flags;
+
+ /* List of properties. See prop_type. */
+ struct property *prop;
+
+ /* Dependencies from enclosing menus, choices, and ifs */
+ struct expr_value dir_dep;
+
+ /* Reverse dependencies through being selected by other symbols */
+ struct expr_value rev_dep;
+
+ /*
+ * "Weak" reverse dependencies through being implied by other symbols
+ */
+ struct expr_value implied;
+};
+
+#define for_all_symbols(i, sym) for (i = 0; i < SYMBOL_HASHSIZE; i++) for (sym = symbol_hash[i]; sym; sym = sym->next)
+
+#define SYMBOL_CONST 0x0001 /* symbol is const */
+#define SYMBOL_CHECK 0x0008 /* used during dependency checking */
+#define SYMBOL_CHOICE 0x0010 /* start of a choice block (null name) */
+#define SYMBOL_CHOICEVAL 0x0020 /* used as a value in a choice block */
+#define SYMBOL_VALID 0x0080 /* set when symbol.curr is calculated */
+#define SYMBOL_OPTIONAL 0x0100 /* choice is optional - values can be 'n' */
+#define SYMBOL_WRITE 0x0200 /* write symbol to file (KCONFIG_CONFIG) */
+#define SYMBOL_CHANGED 0x0400 /* ? */
+#define SYMBOL_WRITTEN 0x0800 /* track info to avoid double-write to .config */
+#define SYMBOL_NO_WRITE 0x1000 /* Symbol for internal use only; it will not be written */
+#define SYMBOL_CHECKED 0x2000 /* used during dependency checking */
+#define SYMBOL_WARNED 0x8000 /* warning has been issued */
+
+/* Set when symbol.def[] is used */
+#define SYMBOL_DEF 0x10000 /* First bit of SYMBOL_DEF */
+#define SYMBOL_DEF_USER 0x10000 /* symbol.def[S_DEF_USER] is valid */
+#define SYMBOL_DEF_AUTO 0x20000 /* symbol.def[S_DEF_AUTO] is valid */
+#define SYMBOL_DEF3 0x40000 /* symbol.def[S_DEF_3] is valid */
+#define SYMBOL_DEF4 0x80000 /* symbol.def[S_DEF_4] is valid */
+
+/* choice values need to be set before calculating this symbol value */
+#define SYMBOL_NEED_SET_CHOICE_VALUES 0x100000
+
+#define SYMBOL_MAXLENGTH 256
+#define SYMBOL_HASHSIZE 9973
+
+/* A property represent the config options that can be associated
+ * with a config "symbol".
+ * Sample:
+ * config FOO
+ * default y
+ * prompt "foo prompt"
+ * select BAR
+ * config BAZ
+ * int "BAZ Value"
+ * range 1..255
+ *
+ * Please, also check parser.y:print_symbol() when modifying the
+ * list of property types!
+ */
+enum prop_type {
+ P_UNKNOWN,
+ P_PROMPT, /* prompt "foo prompt" or "BAZ Value" */
+ P_COMMENT, /* text associated with a comment */
+ P_MENU, /* prompt associated with a menu or menuconfig symbol */
+ P_DEFAULT, /* default y */
+ P_CHOICE, /* choice value */
+ P_SELECT, /* select BAR */
+ P_IMPLY, /* imply BAR */
+ P_RANGE, /* range 7..100 (for a symbol) */
+ P_SYMBOL, /* where a symbol is defined */
+};
+
+struct property {
+ struct property *next; /* next property - null if last */
+ enum prop_type type; /* type of property */
+ const char *text; /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
+ struct expr_value visible;
+ struct expr *expr; /* the optional conditional part of the property */
+ struct menu *menu; /* the menu the property are associated with
+ * valid for: P_SELECT, P_RANGE, P_CHOICE,
+ * P_PROMPT, P_DEFAULT, P_MENU, P_COMMENT */
+ struct file *file; /* what file was this property defined */
+ int lineno; /* what lineno was this property defined */
+};
+
+#define for_all_properties(sym, st, tok) \
+ for (st = sym->prop; st; st = st->next) \
+ if (st->type == (tok))
+#define for_all_defaults(sym, st) for_all_properties(sym, st, P_DEFAULT)
+#define for_all_choices(sym, st) for_all_properties(sym, st, P_CHOICE)
+#define for_all_prompts(sym, st) \
+ for (st = sym->prop; st; st = st->next) \
+ if (st->text)
+
+/*
+ * Represents a node in the menu tree, as seen in e.g. menuconfig (though used
+ * for all front ends). Each symbol, menu, etc. defined in the Kconfig files
+ * gets a node. A symbol defined in multiple locations gets one node at each
+ * location.
+ */
+struct menu {
+ /* The next menu node at the same level */
+ struct menu *next;
+
+ /* The parent menu node, corresponding to e.g. a menu or choice */
+ struct menu *parent;
+
+ /* The first child menu node, for e.g. menus and choices */
+ struct menu *list;
+
+ /*
+ * The symbol associated with the menu node. Choices are implemented as
+ * a special kind of symbol. NULL for menus, comments, and ifs.
+ */
+ struct symbol *sym;
+
+ /*
+ * The prompt associated with the node. This holds the prompt for a
+ * symbol as well as the text for a menu or comment, along with the
+ * type (P_PROMPT, P_MENU, etc.)
+ */
+ struct property *prompt;
+
+ /*
+ * 'visible if' dependencies. If more than one is given, they will be
+ * ANDed together.
+ */
+ struct expr *visibility;
+
+ /*
+ * Ordinary dependencies from e.g. 'depends on' and 'if', ANDed
+ * together
+ */
+ struct expr *dep;
+
+ /* MENU_* flags */
+ unsigned int flags;
+
+ /* Any help text associated with the node */
+ char *help;
+
+ /* The location where the menu node appears in the Kconfig files */
+ struct file *file;
+ int lineno;
+
+ /* For use by front ends that need to store auxiliary data */
+ void *data;
+};
+
+/*
+ * Set on a menu node when the corresponding symbol changes state in some way.
+ * Can be checked by front ends.
+ */
+#define MENU_CHANGED 0x0001
+
+#define MENU_ROOT 0x0002
+
+struct jump_key {
+ struct list_head entries;
+ size_t offset;
+ struct menu *target;
+ int index;
+};
+
+extern struct file *file_list;
+extern struct file *current_file;
+struct file *lookup_file(const char *name);
+
+extern struct symbol symbol_yes, symbol_no, symbol_mod;
+extern struct symbol *modules_sym;
+extern int cdebug;
+struct expr *expr_alloc_symbol(struct symbol *sym);
+struct expr *expr_alloc_one(enum expr_type type, struct expr *ce);
+struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2);
+struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2);
+struct expr *expr_alloc_and(struct expr *e1, struct expr *e2);
+struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
+struct expr *expr_copy(const struct expr *org);
+void expr_free(struct expr *e);
+void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
+int expr_eq(struct expr *e1, struct expr *e2);
+tristate expr_calc_value(struct expr *e);
+struct expr *expr_trans_bool(struct expr *e);
+struct expr *expr_eliminate_dups(struct expr *e);
+struct expr *expr_transform(struct expr *e);
+int expr_contains_symbol(struct expr *dep, struct symbol *sym);
+bool expr_depends_symbol(struct expr *dep, struct symbol *sym);
+struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symbol *sym);
+
+void expr_fprint(struct expr *e, FILE *out);
+struct gstr; /* forward */
+void expr_gstr_print(struct expr *e, struct gstr *gs);
+void expr_gstr_print_revdep(struct expr *e, struct gstr *gs,
+ tristate pr_type, const char *title);
+
+static inline int expr_is_yes(struct expr *e)
+{
+ return !e || (e->type == E_SYMBOL && e->left.sym == &symbol_yes);
+}
+
+static inline int expr_is_no(struct expr *e)
+{
+ return e && (e->type == E_SYMBOL && e->left.sym == &symbol_no);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EXPR_H */
diff --git a/backport/kconf/internal.h b/backport/kconf/internal.h
new file mode 100644
index 000000000000..2f7298c21b64
--- /dev/null
+++ b/backport/kconf/internal.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef INTERNAL_H
+#define INTERNAL_H
+
+struct menu;
+
+extern struct menu *current_menu, *current_entry;
+
+#endif /* INTERNAL_H */
diff --git a/backport/kconf/kconf_id.c b/backport/kconf/kconf_id.c
new file mode 100644
index 000000000000..b3e0ea0ac732
--- /dev/null
+++ b/backport/kconf/kconf_id.c
@@ -0,0 +1,52 @@
+
+static struct kconf_id kconf_id_array[] = {
+ { "mainmenu", T_MAINMENU, TF_COMMAND },
+ { "menu", T_MENU, TF_COMMAND },
+ { "endmenu", T_ENDMENU, TF_COMMAND },
+ { "source", T_SOURCE, TF_COMMAND },
+ { "choice", T_CHOICE, TF_COMMAND },
+ { "endchoice", T_ENDCHOICE, TF_COMMAND },
+ { "comment", T_COMMENT, TF_COMMAND },
+ { "config", T_CONFIG, TF_COMMAND },
+ { "menuconfig", T_MENUCONFIG, TF_COMMAND },
+ { "help", T_HELP, TF_COMMAND },
+ { "---help---", T_HELP, TF_COMMAND },
+ { "if", T_IF, TF_COMMAND|TF_PARAM },
+ { "endif", T_ENDIF, TF_COMMAND },
+ { "depends", T_DEPENDS, TF_COMMAND },
+ { "optional", T_OPTIONAL, TF_COMMAND },
+ { "default", T_DEFAULT, TF_COMMAND, S_UNKNOWN },
+ { "prompt", T_PROMPT, TF_COMMAND },
+ { "tristate", T_TYPE, TF_COMMAND, S_TRISTATE },
+ { "def_tristate", T_DEFAULT, TF_COMMAND, S_TRISTATE },
+ { "bool", T_TYPE, TF_COMMAND, S_BOOLEAN },
+ { "def_bool", T_DEFAULT, TF_COMMAND, S_BOOLEAN },
+ { "int", T_TYPE, TF_COMMAND, S_INT },
+ { "hex", T_TYPE, TF_COMMAND, S_HEX },
+ { "string", T_TYPE, TF_COMMAND, S_STRING },
+ { "select", T_SELECT, TF_COMMAND },
+ { "imply", T_IMPLY, TF_COMMAND },
+ { "range", T_RANGE, TF_COMMAND },
+ { "visible", T_VISIBLE, TF_COMMAND },
+ { "option", T_OPTION, TF_COMMAND },
+ { "on", T_ON, TF_PARAM },
+ { "modules", T_OPT_MODULES, TF_OPTION },
+ { "defconfig_list", T_OPT_DEFCONFIG_LIST, TF_OPTION },
+ { "allnoconfig_y", T_OPT_ALLNOCONFIG_Y, TF_OPTION },
+};
+
+#define KCONF_ID_ARRAY_SIZE (sizeof(kconf_id_array)/sizeof(struct kconf_id))
+
+static const struct kconf_id *kconf_id_lookup(register const char *str, register unsigned int len)
+{
+ int i;
+
+ for (i = 0; i < KCONF_ID_ARRAY_SIZE; i++) {
+ struct kconf_id *id = kconf_id_array+i;
+ int l = strlen(id->name);
+
+ if (len == l && !memcmp(str, id->name, len))
+ return id;
+ }
+ return NULL;
+}
diff --git a/backport/kconf/kconfig.Makefile b/backport/kconf/kconfig.Makefile
new file mode 100644
index 000000000000..1b5f05f6b4b0
--- /dev/null
+++ b/backport/kconf/kconfig.Makefile
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Generic Makefile for userspace kconfig integration / generic simple
+# obj-y build helpers.
+
+# Bring in all the options selected
+#
+# Using optional include with -include will still try to process our .config
+# target, and we don't want that unless the user manually specified that or
+# its part of a dependency chain listing. To do this we have to avoid doing
+# the optional include unless it actually exists, so we re-invent an optional
+# include which doesn't get used unless actually used as a target.
+ifeq (,$(wildcard $(CURDIR)/.config))
+else
+include .config
+endif
+
+# Kconfig filechk magic helper
+include $(KCONFIG_DIR)/Kbuild.include
+
+PROJECTVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
+# Picks up the project version and appends it with any dirty information in
+# case were have modified our tree.
+PROJECTRELEASE = $(shell test -f $(CURDIR)/include/config/project.release && cat $(CURDIR)/include/config/project.release 2> /dev/null)
+
+define filechk_project.release
+ echo "$(PROJECTVERSION)$$($(KCONFIG_DIR)/setlocalversion $(CURDIR))"
+endef
+
+include/config/project.release: $(CURDIR)/Makefile
+ @$(call filechk,project.release)
+
+export PROJECT PROJECTVERSION PROJECTRELEASE
+
+$(KCONFIG_DIR)/mconf:
+ $(MAKE) -C $(KCONFIG_DIR)/ .mconf-cfg
+ $(MAKE) -C $(KCONFIG_DIR)/ mconf
+
+PHONY += menuconfig
+menuconfig: $(KCONFIG_DIR)/mconf include/config/project.release
+ @$< Kconfig
+
+$(KCONFIG_DIR)/nconf:
+ $(MAKE) -C $(KCONFIG_DIR)/ .nconf-cfg
+ $(MAKE) -C $(KCONFIG_DIR)/ nconf
+
+PHONY += nconfig
+nconfig: $(KCONFIG_DIR)/nconf include/config/project.release
+ @$< Kconfig
+
+$(KCONFIG_DIR)/conf:
+ $(MAKE) -C $(KCONFIG_DIR) conf
+
+# More are supported, however we only list the ones tested on this top
+# level Makefile.
+simple-targets := allnoconfig allyesconfig alldefconfig randconfig
+PHONY += $(simple-targets)
+
+$(simple-targets): $(KCONFIG_DIR)/conf
+ $< --$@ Kconfig
+
+defconfig-%:: $(KCONFIG_DIR)/conf
+ @$< --defconfig=defconfigs/$(@:defconfig-%=%) Kconfig
+
+.PHONY: $(PHONY)
diff --git a/backport/kconf/kconfig/.gitignore b/backport/kconf/kconfig/.gitignore
new file mode 100644
index 000000000000..4adcb5a5fb6c
--- /dev/null
+++ b/backport/kconf/kconfig/.gitignore
@@ -0,0 +1,16 @@
+#
+# Generated files
+#
+*.moc
+*.lex.c
+
+#
+# configuration programs
+#
+conf
+mconf
+nconf
+qconf
+gconf
+
+zconf.tab.c
diff --git a/backport/kconf/lexer.l b/backport/kconf/lexer.l
new file mode 100644
index 000000000000..cc386e443683
--- /dev/null
+++ b/backport/kconf/lexer.l
@@ -0,0 +1,468 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ */
+%option nostdinit noyywrap never-interactive full ecs
+%option 8bit nodefault yylineno
+%x ASSIGN_VAL HELP STRING
+%{
+
+#include <assert.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lkc.h"
+#include "parser.tab.h"
+
+#define YY_DECL static int yylex1(void)
+
+#define START_STRSIZE 16
+
+static struct {
+ struct file *file;
+ int lineno;
+} current_pos;
+
+static int prev_prev_token = T_EOL;
+static int prev_token = T_EOL;
+static char *text;
+static int text_size, text_asize;
+
+struct buffer {
+ struct buffer *parent;
+ YY_BUFFER_STATE state;
+};
+
+static struct buffer *current_buf;
+
+static int last_ts, first_ts;
+
+static char *expand_token(const char *in, size_t n);
+static void append_expanded_string(const char *in);
+static void zconf_endhelp(void);
+static void zconf_endfile(void);
+
+static void new_string(void)
+{
+ text = xmalloc(START_STRSIZE);
+ text_asize = START_STRSIZE;
+ text_size = 0;
+ *text = 0;
+}
+
+static void append_string(const char *str, int size)
+{
+ int new_size = text_size + size + 1;
+ if (new_size > text_asize) {
+ new_size += START_STRSIZE - 1;
+ new_size &= -START_STRSIZE;
+ text = xrealloc(text, new_size);
+ text_asize = new_size;
+ }
+ memcpy(text + text_size, str, size);
+ text_size += size;
+ text[text_size] = 0;
+}
+
+static void alloc_string(const char *str, int size)
+{
+ text = xmalloc(size + 1);
+ memcpy(text, str, size);
+ text[size] = 0;
+}
+
+static void warn_ignored_character(char chr)
+{
+ fprintf(stderr,
+ "%s:%d:warning: ignoring unsupported character '%c'\n",
+ current_file->name, yylineno, chr);
+}
+%}
+
+n [A-Za-z0-9_-]
+
+%%
+ char open_quote = 0;
+
+#.* /* ignore comment */
+[ \t]* /* whitespaces */
+\\\n /* escaped new line */
+\n return T_EOL;
+"bool" return T_BOOL;
+"choice" return T_CHOICE;
+"comment" return T_COMMENT;
+"config" return T_CONFIG;
+"def_bool" return T_DEF_BOOL;
+"def_tristate" return T_DEF_TRISTATE;
+"default" return T_DEFAULT;
+"depends" return T_DEPENDS;
+"endchoice" return T_ENDCHOICE;
+"endif" return T_ENDIF;
+"endmenu" return T_ENDMENU;
+"help" return T_HELP;
+"hex" return T_HEX;
+"if" return T_IF;
+"imply" return T_IMPLY;
+"int" return T_INT;
+"mainmenu" return T_MAINMENU;
+"menu" return T_MENU;
+"menuconfig" return T_MENUCONFIG;
+"modules" return T_MODULES;
+"on" return T_ON;
+"optional" return T_OPTIONAL;
+"prompt" return T_PROMPT;
+"range" return T_RANGE;
+"select" return T_SELECT;
+"source" return T_SOURCE;
+"string" return T_STRING;
+"tristate" return T_TRISTATE;
+"visible" return T_VISIBLE;
+"||" return T_OR;
+"&&" return T_AND;
+"=" return T_EQUAL;
+"!=" return T_UNEQUAL;
+"<" return T_LESS;
+"<=" return T_LESS_EQUAL;
+">" return T_GREATER;
+">=" return T_GREATER_EQUAL;
+"!" return T_NOT;
+"(" return T_OPEN_PAREN;
+")" return T_CLOSE_PAREN;
+":=" return T_COLON_EQUAL;
+"+=" return T_PLUS_EQUAL;
+\"|\' {
+ open_quote = yytext[0];
+ new_string();
+ BEGIN(STRING);
+ }
+{n}+ {
+ alloc_string(yytext, yyleng);
+ yylval.string = text;
+ return T_WORD;
+ }
+({n}|$)+ {
+ /* this token includes at least one '$' */
+ yylval.string = expand_token(yytext, yyleng);
+ if (strlen(yylval.string))
+ return T_WORD;
+ free(yylval.string);
+ }
+. warn_ignored_character(*yytext);
+
+<ASSIGN_VAL>{
+ [^[:blank:]\n]+.* {
+ alloc_string(yytext, yyleng);
+ yylval.string = text;
+ return T_ASSIGN_VAL;
+ }
+ \n { BEGIN(INITIAL); return T_EOL; }
+ .
+}
+
+<STRING>{
+ "$".* append_expanded_string(yytext);
+ [^$'"\\\n]+ {
+ append_string(yytext, yyleng);
+ }
+ \\.? {
+ append_string(yytext + 1, yyleng - 1);
+ }
+ \'|\" {
+ if (open_quote == yytext[0]) {
+ BEGIN(INITIAL);
+ yylval.string = text;
+ return T_WORD_QUOTE;
+ } else
+ append_string(yytext, 1);
+ }
+ \n {
+ fprintf(stderr,
+ "%s:%d:warning: multi-line strings not supported\n",
+ zconf_curname(), zconf_lineno());
+ unput('\n');
+ BEGIN(INITIAL);
+ yylval.string = text;
+ return T_WORD_QUOTE;
+ }
+ <<EOF>> {
+ BEGIN(INITIAL);
+ yylval.string = text;
+ return T_WORD_QUOTE;
+ }
+}
+
+<HELP>{
+ [ \t]+ {
+ int ts, i;
+
+ ts = 0;
+ for (i = 0; i < yyleng; i++) {
+ if (yytext[i] == '\t')
+ ts = (ts & ~7) + 8;
+ else
+ ts++;
+ }
+ last_ts = ts;
+ if (first_ts) {
+ if (ts < first_ts) {
+ zconf_endhelp();
+ return T_HELPTEXT;
+ }
+ ts -= first_ts;
+ while (ts > 8) {
+ append_string(" ", 8);
+ ts -= 8;
+ }
+ append_string(" ", ts);
+ }
+ }
+ [ \t]*\n/[^ \t\n] {
+ zconf_endhelp();
+ return T_HELPTEXT;
+ }
+ [ \t]*\n {
+ append_string("\n", 1);
+ }
+ [^ \t\n].* {
+ while (yyleng) {
+ if ((yytext[yyleng-1] != ' ') && (yytext[yyleng-1] != '\t'))
+ break;
+ yyleng--;
+ }
+ append_string(yytext, yyleng);
+ if (!first_ts)
+ first_ts = last_ts;
+ }
+ <<EOF>> {
+ zconf_endhelp();
+ return T_HELPTEXT;
+ }
+}
+
+<<EOF>> {
+ BEGIN(INITIAL);
+
+ if (prev_token != T_EOL && prev_token != T_HELPTEXT)
+ fprintf(stderr, "%s:%d:warning: no new line at end of file\n",
+ current_file->name, yylineno);
+
+ if (current_file) {
+ zconf_endfile();
+ return T_EOL;
+ }
+ fclose(yyin);
+ yyterminate();
+}
+
+%%
+
+/* second stage lexer */
+int yylex(void)
+{
+ int token;
+
+repeat:
+ token = yylex1();
+
+ if (prev_token == T_EOL || prev_token == T_HELPTEXT) {
+ if (token == T_EOL) {
+ /* Do not pass unneeded T_EOL to the parser. */
+ goto repeat;
+ } else {
+ /*
+ * For the parser, update file/lineno at the first token
+ * of each statement. Generally, \n is a statement
+ * terminator in Kconfig, but it is not always true
+ * because \n could be escaped by a backslash.
+ */
+ current_pos.file = current_file;
+ current_pos.lineno = yylineno;
+ }
+ }
+
+ if (prev_prev_token == T_EOL && prev_token == T_WORD &&
+ (token == T_EQUAL || token == T_COLON_EQUAL || token == T_PLUS_EQUAL))
+ BEGIN(ASSIGN_VAL);
+
+ prev_prev_token = prev_token;
+ prev_token = token;
+
+ return token;
+}
+
+static char *expand_token(const char *in, size_t n)
+{
+ char *out;
+ int c;
+ char c2;
+ const char *rest, *end;
+
+ new_string();
+ append_string(in, n);
+
+ /* get the whole line because we do not know the end of token. */
+ while ((c = input()) != EOF) {
+ if (c == '\n') {
+ unput(c);
+ break;
+ }
+ c2 = c;
+ append_string(&c2, 1);
+ }
+
+ rest = text;
+ out = expand_one_token(&rest);
+
+ /* push back unused characters to the input stream */
+ end = rest + strlen(rest);
+ while (end > rest)
+ unput(*--end);
+
+ free(text);
+
+ return out;
+}
+
+static void append_expanded_string(const char *str)
+{
+ const char *end;
+ char *res;
+
+ str++;
+
+ res = expand_dollar(&str);
+
+ /* push back unused characters to the input stream */
+ end = str + strlen(str);
+ while (end > str)
+ unput(*--end);
+
+ append_string(res, strlen(res));
+
+ free(res);
+}
+
+void zconf_starthelp(void)
+{
+ new_string();
+ last_ts = first_ts = 0;
+ BEGIN(HELP);
+}
+
+static void zconf_endhelp(void)
+{
+ yylval.string = text;
+ BEGIN(INITIAL);
+}
+
+
+/*
+ * Try to open specified file with following names:
+ * ./name
+ * $(srctree)/name
+ * The latter is used when srctree is separate from objtree
+ * when compiling the kernel.
+ * Return NULL if file is not found.
+ */
+FILE *zconf_fopen(const char *name)
+{
+ char *env, fullname[PATH_MAX+1];
+ FILE *f;
+
+ f = fopen(name, "r");
+ if (!f && name != NULL && name[0] != '/') {
+ env = getenv(SRCTREE);
+ if (env) {
+ snprintf(fullname, sizeof(fullname),
+ "%s/%s", env, name);
+ f = fopen(fullname, "r");
+ }
+ }
+ return f;
+}
+
+void zconf_initscan(const char *name)
+{
+ yyin = zconf_fopen(name);
+ if (!yyin) {
+ fprintf(stderr, "can't find file %s\n", name);
+ exit(1);
+ }
+
+ current_buf = xmalloc(sizeof(*current_buf));
+ memset(current_buf, 0, sizeof(*current_buf));
+
+ current_file = file_lookup(name);
+ yylineno = 1;
+}
+
+void zconf_nextfile(const char *name)
+{
+ struct file *iter;
+ struct file *file = file_lookup(name);
+ struct buffer *buf = xmalloc(sizeof(*buf));
+ memset(buf, 0, sizeof(*buf));
+
+ current_buf->state = YY_CURRENT_BUFFER;
+ yyin = zconf_fopen(file->name);
+ if (!yyin) {
+ fprintf(stderr, "%s:%d: can't open file \"%s\"\n",
+ zconf_curname(), zconf_lineno(), file->name);
+ exit(1);
+ }
+ yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
+ buf->parent = current_buf;
+ current_buf = buf;
+
+ current_file->lineno = yylineno;
+ file->parent = current_file;
+
+ for (iter = current_file; iter; iter = iter->parent) {
+ if (!strcmp(iter->name, file->name)) {
+ fprintf(stderr,
+ "Recursive inclusion detected.\n"
+ "Inclusion path:\n"
+ " current file : %s\n", file->name);
+ iter = file;
+ do {
+ iter = iter->parent;
+ fprintf(stderr, " included from: %s:%d\n",
+ iter->name, iter->lineno - 1);
+ } while (strcmp(iter->name, file->name));
+ exit(1);
+ }
+ }
+
+ yylineno = 1;
+ current_file = file;
+}
+
+static void zconf_endfile(void)
+{
+ struct buffer *parent;
+
+ current_file = current_file->parent;
+ if (current_file)
+ yylineno = current_file->lineno;
+
+ parent = current_buf->parent;
+ if (parent) {
+ fclose(yyin);
+ yy_delete_buffer(YY_CURRENT_BUFFER);
+ yy_switch_to_buffer(parent->state);
+ }
+ free(current_buf);
+ current_buf = parent;
+}
+
+int zconf_lineno(void)
+{
+ return current_pos.lineno;
+}
+
+const char *zconf_curname(void)
+{
+ return current_pos.file ? current_pos.file->name : "<none>";
+}
diff --git a/backport/kconf/list.h b/backport/kconf/list.h
new file mode 100644
index 000000000000..45cb237ab7ef
--- /dev/null
+++ b/backport/kconf/list.h
@@ -0,0 +1,132 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef LIST_H
+#define LIST_H
+
+/*
+ * Copied from include/linux/...
+ */
+
+#undef offsetof
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+
+/**
+ * container_of - cast a member of a structure out to the containing structure
+ * @ptr: the pointer to the member.
+ * @type: the type of the container struct this is embedded in.
+ * @member: the name of the member within the struct.
+ *
+ */
+#define container_of(ptr, type, member) ({ \
+ const typeof( ((type *)0)->member ) *__mptr = (ptr); \
+ (type *)( (char *)__mptr - offsetof(type,member) );})
+
+
+struct list_head {
+ struct list_head *next, *prev;
+};
+
+
+#define LIST_HEAD_INIT(name) { &(name), &(name) }
+
+#define LIST_HEAD(name) \
+ struct list_head name = LIST_HEAD_INIT(name)
+
+/**
+ * list_entry - get the struct for this entry
+ * @ptr: the &struct list_head pointer.
+ * @type: the type of the struct this is embedded in.
+ * @member: the name of the list_head within the struct.
+ */
+#define list_entry(ptr, type, member) \
+ container_of(ptr, type, member)
+
+/**
+ * list_for_each_entry - iterate over list of given type
+ * @pos: the type * to use as a loop cursor.
+ * @head: the head for your list.
+ * @member: the name of the list_head within the struct.
+ */
+#define list_for_each_entry(pos, head, member) \
+ for (pos = list_entry((head)->next, typeof(*pos), member); \
+ &pos->member != (head); \
+ pos = list_entry(pos->member.next, typeof(*pos), member))
+
+/**
+ * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
+ * @pos: the type * to use as a loop cursor.
+ * @n: another type * to use as temporary storage
+ * @head: the head for your list.
+ * @member: the name of the list_head within the struct.
+ */
+#define list_for_each_entry_safe(pos, n, head, member) \
+ for (pos = list_entry((head)->next, typeof(*pos), member), \
+ n = list_entry(pos->member.next, typeof(*pos), member); \
+ &pos->member != (head); \
+ pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+/**
+ * list_empty - tests whether a list is empty
+ * @head: the list to test.
+ */
+static inline int list_empty(const struct list_head *head)
+{
+ return head->next == head;
+}
+
+/*
+ * Insert a new entry between two known consecutive entries.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+static inline void __list_add(struct list_head *_new,
+ struct list_head *prev,
+ struct list_head *next)
+{
+ next->prev = _new;
+ _new->next = next;
+ _new->prev = prev;
+ prev->next = _new;
+}
+
+/**
+ * list_add_tail - add a new entry
+ * @new: new entry to be added
+ * @head: list head to add it before
+ *
+ * Insert a new entry before the specified head.
+ * This is useful for implementing queues.
+ */
+static inline void list_add_tail(struct list_head *_new, struct list_head *head)
+{
+ __list_add(_new, head->prev, head);
+}
+
+/*
+ * Delete a list entry by making the prev/next entries
+ * point to each other.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+static inline void __list_del(struct list_head *prev, struct list_head *next)
+{
+ next->prev = prev;
+ prev->next = next;
+}
+
+#define LIST_POISON1 ((void *) 0x00100100)
+#define LIST_POISON2 ((void *) 0x00200200)
+/**
+ * list_del - deletes entry from list.
+ * @entry: the element to delete from the list.
+ * Note: list_empty() on entry does not return true after this, the entry is
+ * in an undefined state.
+ */
+static inline void list_del(struct list_head *entry)
+{
+ __list_del(entry->prev, entry->next);
+ entry->next = (struct list_head*)LIST_POISON1;
+ entry->prev = (struct list_head*)LIST_POISON2;
+}
+#endif
diff --git a/backport/kconf/lkc.h b/backport/kconf/lkc.h
new file mode 100644
index 000000000000..fa8c010aa683
--- /dev/null
+++ b/backport/kconf/lkc.h
@@ -0,0 +1,156 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ */
+
+#ifndef LKC_H
+#define LKC_H
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "expr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "lkc_proto.h"
+
+#define SRCTREE "srctree"
+
+#ifndef CONFIG_
+#define CONFIG_ "CONFIG_"
+#endif
+static inline const char *CONFIG_prefix(void)
+{
+ return getenv( "CONFIG_" ) ?: CONFIG_;
+}
+#undef CONFIG_
+#define CONFIG_ CONFIG_prefix()
+
+extern int yylineno;
+void zconfdump(FILE *out);
+void zconf_starthelp(void);
+FILE *zconf_fopen(const char *name);
+void zconf_initscan(const char *name);
+void zconf_nextfile(const char *name);
+int zconf_lineno(void);
+const char *zconf_curname(void);
+
+/* confdata.c */
+const char *conf_get_configname(void);
+void set_all_choice_values(struct symbol *csym);
+
+/* confdata.c and expr.c */
+static inline void xfwrite(const void *str, size_t len, size_t count, FILE *out)
+{
+ assert(len != 0);
+
+ if (fwrite(str, len, count, out) != count)
+ fprintf(stderr, "Error in writing or end of file.\n");
+}
+
+/* util.c */
+struct file *file_lookup(const char *name);
+void *xmalloc(size_t size);
+void *xcalloc(size_t nmemb, size_t size);
+void *xrealloc(void *p, size_t size);
+char *xstrdup(const char *s);
+char *xstrndup(const char *s, size_t n);
+
+/* lexer.l */
+int yylex(void);
+
+struct gstr {
+ size_t len;
+ char *s;
+ /*
+ * when max_width is not zero long lines in string s (if any) get
+ * wrapped not to exceed the max_width value
+ */
+ int max_width;
+};
+struct gstr str_new(void);
+void str_free(struct gstr *gs);
+void str_append(struct gstr *gs, const char *s);
+void str_printf(struct gstr *gs, const char *fmt, ...);
+const char *str_get(struct gstr *gs);
+
+/* menu.c */
+void _menu_init(void);
+void menu_warn(struct menu *menu, const char *fmt, ...);
+struct menu *menu_add_menu(void);
+void menu_end_menu(void);
+void menu_add_entry(struct symbol *sym);
+void menu_add_dep(struct expr *dep);
+void menu_add_visibility(struct expr *dep);
+struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep);
+void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep);
+void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep);
+void menu_finalize(struct menu *parent);
+void menu_set_type(int type);
+
+extern struct menu rootmenu;
+
+bool menu_is_empty(struct menu *menu);
+bool menu_is_visible(struct menu *menu);
+bool menu_has_prompt(struct menu *menu);
+const char *menu_get_prompt(struct menu *menu);
+struct menu *menu_get_root_menu(struct menu *menu);
+struct menu *menu_get_parent_menu(struct menu *menu);
+bool menu_has_help(struct menu *menu);
+const char *menu_get_help(struct menu *menu);
+struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head);
+void menu_get_ext_help(struct menu *menu, struct gstr *help);
+
+/* symbol.c */
+void sym_clear_all_valid(void);
+struct symbol *sym_choice_default(struct symbol *sym);
+struct property *sym_get_range_prop(struct symbol *sym);
+const char *sym_get_string_default(struct symbol *sym);
+struct symbol *sym_check_deps(struct symbol *sym);
+struct symbol *prop_get_symbol(struct property *prop);
+
+static inline tristate sym_get_tristate_value(struct symbol *sym)
+{
+ return sym->curr.tri;
+}
+
+
+static inline struct symbol *sym_get_choice_value(struct symbol *sym)
+{
+ return (struct symbol *)sym->curr.val;
+}
+
+static inline bool sym_set_choice_value(struct symbol *ch, struct symbol *chval)
+{
+ return sym_set_tristate_value(chval, yes);
+}
+
+static inline bool sym_is_choice(struct symbol *sym)
+{
+ return sym->flags & SYMBOL_CHOICE ? true : false;
+}
+
+static inline bool sym_is_choice_value(struct symbol *sym)
+{
+ return sym->flags & SYMBOL_CHOICEVAL ? true : false;
+}
+
+static inline bool sym_is_optional(struct symbol *sym)
+{
+ return sym->flags & SYMBOL_OPTIONAL ? true : false;
+}
+
+static inline bool sym_has_value(struct symbol *sym)
+{
+ return sym->flags & SYMBOL_DEF_USER ? true : false;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LKC_H */
diff --git a/backport/kconf/lkc_proto.h b/backport/kconf/lkc_proto.h
new file mode 100644
index 000000000000..edd1e617b25c
--- /dev/null
+++ b/backport/kconf/lkc_proto.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <stdarg.h>
+
+/* confdata.c */
+void conf_parse(const char *name);
+int conf_read(const char *name);
+int conf_read_simple(const char *name, int);
+int conf_write_defconfig(const char *name);
+int conf_write(const char *name);
+int conf_write_autoconf(int overwrite);
+void conf_set_changed(bool val);
+bool conf_get_changed(void);
+void conf_set_changed_callback(void (*fn)(void));
+void conf_set_message_callback(void (*fn)(const char *s));
+
+/* symbol.c */
+extern struct symbol * symbol_hash[SYMBOL_HASHSIZE];
+
+struct symbol * sym_lookup(const char *name, int flags);
+struct symbol * sym_find(const char *name);
+void print_symbol_for_listconfig(struct symbol *sym);
+struct symbol ** sym_re_search(const char *pattern);
+const char * sym_type_name(enum symbol_type type);
+void sym_calc_value(struct symbol *sym);
+enum symbol_type sym_get_type(struct symbol *sym);
+bool sym_tristate_within_range(struct symbol *sym,tristate tri);
+bool sym_set_tristate_value(struct symbol *sym,tristate tri);
+tristate sym_toggle_tristate_value(struct symbol *sym);
+bool sym_string_valid(struct symbol *sym, const char *newval);
+bool sym_string_within_range(struct symbol *sym, const char *str);
+bool sym_set_string_value(struct symbol *sym, const char *newval);
+bool sym_is_changeable(struct symbol *sym);
+struct property * sym_get_choice_prop(struct symbol *sym);
+const char * sym_get_string_value(struct symbol *sym);
+
+const char * prop_get_type_name(enum prop_type type);
+
+/* preprocess.c */
+enum variable_flavor {
+ VAR_SIMPLE,
+ VAR_RECURSIVE,
+ VAR_APPEND,
+};
+void env_write_dep(FILE *f, const char *auto_conf_name);
+void variable_add(const char *name, const char *value,
+ enum variable_flavor flavor);
+void variable_all_del(void);
+char *expand_dollar(const char **str);
+char *expand_one_token(const char **str);
+
+/* expr.c */
+void expr_print(struct expr *e, void (*fn)(void *, struct symbol *, const char *), void *data, int prevtoken);
diff --git a/backport/kconf/lxdialog/.gitignore b/backport/kconf/lxdialog/.gitignore
new file mode 100644
index 000000000000..90b08ff025a6
--- /dev/null
+++ b/backport/kconf/lxdialog/.gitignore
@@ -0,0 +1,4 @@
+#
+# Generated files
+#
+lxdialog
diff --git a/backport/kconf/lxdialog/BIG.FAT.WARNING b/backport/kconf/lxdialog/BIG.FAT.WARNING
new file mode 100644
index 000000000000..7cb5a7ec93d2
--- /dev/null
+++ b/backport/kconf/lxdialog/BIG.FAT.WARNING
@@ -0,0 +1,4 @@
+This is NOT the official version of dialog. This version has been
+significantly modified from the original. It is for use by the Linux
+kernel configuration script. Please do not bother Savio Lam with
+questions about this program.
diff --git a/backport/kconf/lxdialog/checklist.c b/backport/kconf/lxdialog/checklist.c
new file mode 100644
index 000000000000..fd161cfff121
--- /dev/null
+++ b/backport/kconf/lxdialog/checklist.c
@@ -0,0 +1,319 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * checklist.c -- implements the checklist box
+ *
+ * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
+ * Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
+ * Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
+ * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
+ */
+
+#include "dialog.h"
+
+static int list_width, check_x, item_x;
+
+/*
+ * Print list item
+ */
+static void print_item(WINDOW * win, int choice, int selected)
+{
+ int i;
+ char *list_item = malloc(list_width + 1);
+
+ strncpy(list_item, item_str(), list_width - item_x);
+ list_item[list_width - item_x] = '\0';
+
+ /* Clear 'residue' of last item */
+ wattrset(win, dlg.menubox.atr);
+ wmove(win, choice, 0);
+ for (i = 0; i < list_width; i++)
+ waddch(win, ' ');
+
+ wmove(win, choice, check_x);
+ wattrset(win, selected ? dlg.check_selected.atr
+ : dlg.check.atr);
+ if (!item_is_tag(':'))
+ wprintw(win, "(%c)", item_is_tag('X') ? 'X' : ' ');
+
+ wattrset(win, selected ? dlg.tag_selected.atr : dlg.tag.atr);
+ mvwaddch(win, choice, item_x, list_item[0]);
+ wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
+ waddstr(win, list_item + 1);
+ if (selected) {
+ wmove(win, choice, check_x + 1);
+ wrefresh(win);
+ }
+ free(list_item);
+}
+
+/*
+ * Print the scroll indicators.
+ */
+static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
+ int y, int x, int height)
+{
+ wmove(win, y, x);
+
+ if (scroll > 0) {
+ wattrset(win, dlg.uarrow.atr);
+ waddch(win, ACS_UARROW);
+ waddstr(win, "(-)");
+ } else {
+ wattrset(win, dlg.menubox.atr);
+ waddch(win, ACS_HLINE);
+ waddch(win, ACS_HLINE);
+ waddch(win, ACS_HLINE);
+ waddch(win, ACS_HLINE);
+ }
+
+ y = y + height + 1;
+ wmove(win, y, x);
+
+ if ((height < item_no) && (scroll + choice < item_no - 1)) {
+ wattrset(win, dlg.darrow.atr);
+ waddch(win, ACS_DARROW);
+ waddstr(win, "(+)");
+ } else {
+ wattrset(win, dlg.menubox_border.atr);
+ waddch(win, ACS_HLINE);
+ waddch(win, ACS_HLINE);
+ waddch(win, ACS_HLINE);
+ waddch(win, ACS_HLINE);
+ }
+}
+
+/*
+ * Display the termination buttons
+ */
+static void print_buttons(WINDOW * dialog, int height, int width, int selected)
+{
+ int x = width / 2 - 11;
+ int y = height - 2;
+
+ print_button(dialog, "Select", y, x, selected == 0);
+ print_button(dialog, " Help ", y, x + 14, selected == 1);
+
+ wmove(dialog, y, x + 1 + 14 * selected);
+ wrefresh(dialog);
+}
+
+/*
+ * Display a dialog box with a list of options that can be turned on or off
+ * in the style of radiolist (only one option turned on at a time).
+ */
+int dialog_checklist(const char *title, const char *prompt, int height,
+ int width, int list_height)
+{
+ int i, x, y, box_x, box_y;
+ int key = 0, button = 0, choice = 0, scroll = 0, max_choice;
+ WINDOW *dialog, *list;
+
+ /* which item to highlight */
+ item_foreach() {
+ if (item_is_tag('X'))
+ choice = item_n();
+ if (item_is_selected()) {
+ choice = item_n();
+ break;
+ }
+ }
+
+do_resize:
+ if (getmaxy(stdscr) < (height + CHECKLIST_HEIGTH_MIN))
+ return -ERRDISPLAYTOOSMALL;
+ if (getmaxx(stdscr) < (width + CHECKLIST_WIDTH_MIN))
+ return -ERRDISPLAYTOOSMALL;
+
+ max_choice = MIN(list_height, item_count());
+
+ /* center dialog box on screen */
+ x = (getmaxx(stdscr) - width) / 2;
+ y = (getmaxy(stdscr) - height) / 2;
+
+ draw_shadow(stdscr, y, x, height, width);
+
+ dialog = newwin(height, width, y, x);
+ keypad(dialog, TRUE);
+
+ draw_box(dialog, 0, 0, height, width,
+ dlg.dialog.atr, dlg.border.atr);
+ wattrset(dialog, dlg.border.atr);
+ mvwaddch(dialog, height - 3, 0, ACS_LTEE);
+ for (i = 0; i < width - 2; i++)
+ waddch(dialog, ACS_HLINE);
+ wattrset(dialog, dlg.dialog.atr);
+ waddch(dialog, ACS_RTEE);
+
+ print_title(dialog, title, width);
+
+ wattrset(dialog, dlg.dialog.atr);
+ print_autowrap(dialog, prompt, width - 2, 1, 3);
+
+ list_width = width - 6;
+ box_y = height - list_height - 5;
+ box_x = (width - list_width) / 2 - 1;
+
+ /* create new window for the list */
+ list = subwin(dialog, list_height, list_width, y + box_y + 1,
+ x + box_x + 1);
+
+ keypad(list, TRUE);
+
+ /* draw a box around the list items */
+ draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
+ dlg.menubox_border.atr, dlg.menubox.atr);
+
+ /* Find length of longest item in order to center checklist */
+ check_x = 0;
+ item_foreach()
+ check_x = MAX(check_x, strlen(item_str()) + 4);
+ check_x = MIN(check_x, list_width);
+
+ check_x = (list_width - check_x) / 2;
+ item_x = check_x + 4;
+
+ if (choice >= list_height) {
+ scroll = choice - list_height + 1;
+ choice -= scroll;
+ }
+
+ /* Print the list */
+ for (i = 0; i < max_choice; i++) {
+ item_set(scroll + i);
+ print_item(list, i, i == choice);
+ }
+
+ print_arrows(dialog, choice, item_count(), scroll,
+ box_y, box_x + check_x + 5, list_height);
+
+ print_buttons(dialog, height, width, 0);
+
+ wnoutrefresh(dialog);
+ wnoutrefresh(list);
+ doupdate();
+
+ while (key != KEY_ESC) {
+ key = wgetch(dialog);
+
+ for (i = 0; i < max_choice; i++) {
+ item_set(i + scroll);
+ if (toupper(key) == toupper(item_str()[0]))
+ break;
+ }
+
+ if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
+ key == '+' || key == '-') {
+ if (key == KEY_UP || key == '-') {
+ if (!choice) {
+ if (!scroll)
+ continue;
+ /* Scroll list down */
+ if (list_height > 1) {
+ /* De-highlight current first item */
+ item_set(scroll);
+ print_item(list, 0, FALSE);
+ scrollok(list, TRUE);
+ wscrl(list, -1);
+ scrollok(list, FALSE);
+ }
+ scroll--;
+ item_set(scroll);
+ print_item(list, 0, TRUE);
+ print_arrows(dialog, choice, item_count(),
+ scroll, box_y, box_x + check_x + 5, list_height);
+
+ wnoutrefresh(dialog);
+ wrefresh(list);
+
+ continue; /* wait for another key press */
+ } else
+ i = choice - 1;
+ } else if (key == KEY_DOWN || key == '+') {
+ if (choice == max_choice - 1) {
+ if (scroll + choice >= item_count() - 1)
+ continue;
+ /* Scroll list up */
+ if (list_height > 1) {
+ /* De-highlight current last item before scrolling up */
+ item_set(scroll + max_choice - 1);
+ print_item(list,
+ max_choice - 1,
+ FALSE);
+ scrollok(list, TRUE);
+ wscrl(list, 1);
+ scrollok(list, FALSE);
+ }
+ scroll++;
+ item_set(scroll + max_choice - 1);
+ print_item(list, max_choice - 1, TRUE);
+
+ print_arrows(dialog, choice, item_count(),
+ scroll, box_y, box_x + check_x + 5, list_height);
+
+ wnoutrefresh(dialog);
+ wrefresh(list);
+
+ continue; /* wait for another key press */
+ } else
+ i = choice + 1;
+ }
+ if (i != choice) {
+ /* De-highlight current item */
+ item_set(scroll + choice);
+ print_item(list, choice, FALSE);
+ /* Highlight new item */
+ choice = i;
+ item_set(scroll + choice);
+ print_item(list, choice, TRUE);
+ wnoutrefresh(dialog);
+ wrefresh(list);
+ }
+ continue; /* wait for another key press */
+ }
+ switch (key) {
+ case 'H':
+ case 'h':
+ case '?':
+ button = 1;
+ /* fall-through */
+ case 'S':
+ case 's':
+ case ' ':
+ case '\n':
+ item_foreach()
+ item_set_selected(0);
+ item_set(scroll + choice);
+ item_set_selected(1);
+ delwin(list);
+ delwin(dialog);
+ return button;
+ case TAB:
+ case KEY_LEFT:
+ case KEY_RIGHT:
+ button = ((key == KEY_LEFT ? --button : ++button) < 0)
+ ? 1 : (button > 1 ? 0 : button);
+
+ print_buttons(dialog, height, width, button);
+ wrefresh(dialog);
+ break;
+ case 'X':
+ case 'x':
+ key = KEY_ESC;
+ break;
+ case KEY_ESC:
+ key = on_key_esc(dialog);
+ break;
+ case KEY_RESIZE:
+ delwin(list);
+ delwin(dialog);
+ on_key_resize();
+ goto do_resize;
+ }
+
+ /* Now, update everything... */
+ doupdate();
+ }
+ delwin(list);
+ delwin(dialog);
+ return key; /* ESC pressed */
+}
diff --git a/backport/kconf/lxdialog/dialog.h b/backport/kconf/lxdialog/dialog.h
new file mode 100644
index 000000000000..68b565e3c495
--- /dev/null
+++ b/backport/kconf/lxdialog/dialog.h
@@ -0,0 +1,238 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * dialog.h -- common declarations for all dialog modules
+ *
+ * AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
+ */
+
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+#ifdef __sun__
+#define CURS_MACROS
+#endif
+#include <ncurses.h>
+
+/*
+ * Colors in ncurses 1.9.9e do not work properly since foreground and
+ * background colors are OR'd rather than separately masked. This version
+ * of dialog was hacked to work with ncurses 1.9.9e, making it incompatible
+ * with standard curses. The simplest fix (to make this work with standard
+ * curses) uses the wbkgdset() function, not used in the original hack.
+ * Turn it off if we're building with 1.9.9e, since it just confuses things.
+ */
+#if defined(NCURSES_VERSION) && defined(_NEED_WRAP) && !defined(GCC_PRINTFLIKE)
+#define OLD_NCURSES 1
+#undef wbkgdset
+#define wbkgdset(w,p) /*nothing */
+#else
+#define OLD_NCURSES 0
+#endif
+
+#define TR(params) _tracef params
+
+#define KEY_ESC 27
+#define TAB 9
+#define MAX_LEN 2048
+#define BUF_SIZE (10*1024)
+#define MIN(x,y) (x < y ? x : y)
+#define MAX(x,y) (x > y ? x : y)
+
+#ifndef ACS_ULCORNER
+#define ACS_ULCORNER '+'
+#endif
+#ifndef ACS_LLCORNER
+#define ACS_LLCORNER '+'
+#endif
+#ifndef ACS_URCORNER
+#define ACS_URCORNER '+'
+#endif
+#ifndef ACS_LRCORNER
+#define ACS_LRCORNER '+'
+#endif
+#ifndef ACS_HLINE
+#define ACS_HLINE '-'
+#endif
+#ifndef ACS_VLINE
+#define ACS_VLINE '|'
+#endif
+#ifndef ACS_LTEE
+#define ACS_LTEE '+'
+#endif
+#ifndef ACS_RTEE
+#define ACS_RTEE '+'
+#endif
+#ifndef ACS_UARROW
+#define ACS_UARROW '^'
+#endif
+#ifndef ACS_DARROW
+#define ACS_DARROW 'v'
+#endif
+
+/* error return codes */
+#define ERRDISPLAYTOOSMALL (KEY_MAX + 1)
+
+/*
+ * Color definitions
+ */
+struct dialog_color {
+ chtype atr; /* Color attribute */
+ int fg; /* foreground */
+ int bg; /* background */
+ int hl; /* highlight this item */
+};
+
+struct subtitle_list {
+ struct subtitle_list *next;
+ const char *text;
+};
+
+struct dialog_info {
+ const char *backtitle;
+ struct subtitle_list *subtitles;
+ struct dialog_color screen;
+ struct dialog_color shadow;
+ struct dialog_color dialog;
+ struct dialog_color title;
+ struct dialog_color border;
+ struct dialog_color button_active;
+ struct dialog_color button_inactive;
+ struct dialog_color button_key_active;
+ struct dialog_color button_key_inactive;
+ struct dialog_color button_label_active;
+ struct dialog_color button_label_inactive;
+ struct dialog_color inputbox;
+ struct dialog_color inputbox_border;
+ struct dialog_color searchbox;
+ struct dialog_color searchbox_title;
+ struct dialog_color searchbox_border;
+ struct dialog_color position_indicator;
+ struct dialog_color menubox;
+ struct dialog_color menubox_border;
+ struct dialog_color item;
+ struct dialog_color item_selected;
+ struct dialog_color tag;
+ struct dialog_color tag_selected;
+ struct dialog_color tag_key;
+ struct dialog_color tag_key_selected;
+ struct dialog_color check;
+ struct dialog_color check_selected;
+ struct dialog_color uarrow;
+ struct dialog_color darrow;
+};
+
+/*
+ * Global variables
+ */
+extern struct dialog_info dlg;
+extern char dialog_input_result[];
+extern int saved_x, saved_y; /* Needed in signal handler in mconf.c */
+
+/*
+ * Function prototypes
+ */
+
+/* item list as used by checklist and menubox */
+void item_reset(void);
+void item_make(const char *fmt, ...);
+void item_add_str(const char *fmt, ...);
+void item_set_tag(char tag);
+void item_set_data(void *p);
+void item_set_selected(int val);
+int item_activate_selected(void);
+void *item_data(void);
+char item_tag(void);
+
+/* item list manipulation for lxdialog use */
+#define MAXITEMSTR 200
+struct dialog_item {
+ char str[MAXITEMSTR]; /* prompt displayed */
+ char tag;
+ void *data; /* pointer to menu item - used by menubox+checklist */
+ int selected; /* Set to 1 by dialog_*() function if selected. */
+};
+
+/* list of lialog_items */
+struct dialog_list {
+ struct dialog_item node;
+ struct dialog_list *next;
+};
+
+extern struct dialog_list *item_cur;
+extern struct dialog_list item_nil;
+extern struct dialog_list *item_head;
+
+int item_count(void);
+void item_set(int n);
+int item_n(void);
+const char *item_str(void);
+int item_is_selected(void);
+int item_is_tag(char tag);
+#define item_foreach() \
+ for (item_cur = item_head ? item_head: item_cur; \
+ item_cur && (item_cur != &item_nil); item_cur = item_cur->next)
+
+/* generic key handlers */
+int on_key_esc(WINDOW *win);
+int on_key_resize(void);
+
+/* minimum (re)size values */
+#define CHECKLIST_HEIGTH_MIN 6 /* For dialog_checklist() */
+#define CHECKLIST_WIDTH_MIN 6
+#define INPUTBOX_HEIGTH_MIN 2 /* For dialog_inputbox() */
+#define INPUTBOX_WIDTH_MIN 2
+#define MENUBOX_HEIGTH_MIN 15 /* For dialog_menu() */
+#define MENUBOX_WIDTH_MIN 65
+#define TEXTBOX_HEIGTH_MIN 8 /* For dialog_textbox() */
+#define TEXTBOX_WIDTH_MIN 8
+#define YESNO_HEIGTH_MIN 4 /* For dialog_yesno() */
+#define YESNO_WIDTH_MIN 4
+#define WINDOW_HEIGTH_MIN 19 /* For init_dialog() */
+#define WINDOW_WIDTH_MIN 80
+
+int init_dialog(const char *backtitle);
+void set_dialog_backtitle(const char *backtitle);
+void set_dialog_subtitles(struct subtitle_list *subtitles);
+void end_dialog(int x, int y);
+void attr_clear(WINDOW * win, int height, int width, chtype attr);
+void dialog_clear(void);
+void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x);
+void print_button(WINDOW * win, const char *label, int y, int x, int selected);
+void print_title(WINDOW *dialog, const char *title, int width);
+void draw_box(WINDOW * win, int y, int x, int height, int width, chtype box,
+ chtype border);
+void draw_shadow(WINDOW * win, int y, int x, int height, int width);
+
+int first_alpha(const char *string, const char *exempt);
+int dialog_yesno(const char *title, const char *prompt, int height, int width);
+int dialog_msgbox(const char *title, const char *prompt, int height,
+ int width, int pause);
+
+
+typedef void (*update_text_fn)(char *buf, size_t start, size_t end, void
+ *_data);
+int dialog_textbox(const char *title, char *tbuf, int initial_height,
+ int initial_width, int *keys, int *_vscroll, int *_hscroll,
+ update_text_fn update_text, void *data);
+int dialog_menu(const char *title, const char *prompt,
+ const void *selected, int *s_scroll);
+int dialog_checklist(const char *title, const char *prompt, int height,
+ int width, int list_height);
+int dialog_inputbox(const char *title, const char *prompt, int height,
+ int width, const char *init);
+
+/*
+ * This is the base for fictitious keys, which activate
+ * the buttons.
+ *
+ * Mouse-generated keys are the following:
+ * -- the first 32 are used as numbers, in addition to '0'-'9'
+ * -- the lowercase are used to signal mouse-enter events (M_EVENT + 'o')
+ * -- uppercase chars are used to invoke the button (M_EVENT + 'O')
+ */
+#define M_EVENT (KEY_MAX+1)
diff --git a/backport/kconf/lxdialog/inputbox.c b/backport/kconf/lxdialog/inputbox.c
new file mode 100644
index 000000000000..1dcfb288ee63
--- /dev/null
+++ b/backport/kconf/lxdialog/inputbox.c
@@ -0,0 +1,289 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * inputbox.c -- implements the input box
+ *
+ * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
+ * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
+ */
+
+#include "dialog.h"
+
+char dialog_input_result[MAX_LEN + 1];
+
+/*
+ * Print the termination buttons
+ */
+static void print_buttons(WINDOW * dialog, int height, int width, int selected)
+{
+ int x = width / 2 - 11;
+ int y = height - 2;
+
+ print_button(dialog, " Ok ", y, x, selected == 0);
+ print_button(dialog, " Help ", y, x + 14, selected == 1);
+
+ wmove(dialog, y, x + 1 + 14 * selected);
+ wrefresh(dialog);
+}
+
+/*
+ * Display a dialog box for inputing a string
+ */
+int dialog_inputbox(const char *title, const char *prompt, int height, int width,
+ const char *init)
+{
+ int i, x, y, box_y, box_x, box_width;
+ int input_x = 0, key = 0, button = -1;
+ int show_x, len, pos;
+ char *instr = dialog_input_result;
+ WINDOW *dialog;
+
+ if (!init)
+ instr[0] = '\0';
+ else
+ strcpy(instr, init);
+
+do_resize:
+ if (getmaxy(stdscr) <= (height - INPUTBOX_HEIGTH_MIN))
+ return -ERRDISPLAYTOOSMALL;
+ if (getmaxx(stdscr) <= (width - INPUTBOX_WIDTH_MIN))
+ return -ERRDISPLAYTOOSMALL;
+
+ /* center dialog box on screen */
+ x = (getmaxx(stdscr) - width) / 2;
+ y = (getmaxy(stdscr) - height) / 2;
+
+ draw_shadow(stdscr, y, x, height, width);
+
+ dialog = newwin(height, width, y, x);
+ keypad(dialog, TRUE);
+
+ draw_box(dialog, 0, 0, height, width,
+ dlg.dialog.atr, dlg.border.atr);
+ wattrset(dialog, dlg.border.atr);
+ mvwaddch(dialog, height - 3, 0, ACS_LTEE);
+ for (i = 0; i < width - 2; i++)
+ waddch(dialog, ACS_HLINE);
+ wattrset(dialog, dlg.dialog.atr);
+ waddch(dialog, ACS_RTEE);
+
+ print_title(dialog, title, width);
+
+ wattrset(dialog, dlg.dialog.atr);
+ print_autowrap(dialog, prompt, width - 2, 1, 3);
+
+ /* Draw the input field box */
+ box_width = width - 6;
+ getyx(dialog, y, x);
+ box_y = y + 2;
+ box_x = (width - box_width) / 2;
+ draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2,
+ dlg.dialog.atr, dlg.border.atr);
+
+ print_buttons(dialog, height, width, 0);
+
+ /* Set up the initial value */
+ wmove(dialog, box_y, box_x);
+ wattrset(dialog, dlg.inputbox.atr);
+
+ len = strlen(instr);
+ pos = len;
+
+ if (len >= box_width) {
+ show_x = len - box_width + 1;
+ input_x = box_width - 1;
+ for (i = 0; i < box_width - 1; i++)
+ waddch(dialog, instr[show_x + i]);
+ } else {
+ show_x = 0;
+ input_x = len;
+ waddstr(dialog, instr);
+ }
+
+ wmove(dialog, box_y, box_x + input_x);
+
+ wrefresh(dialog);
+
+ while (key != KEY_ESC) {
+ key = wgetch(dialog);
+
+ if (button == -1) { /* Input box selected */
+ switch (key) {
+ case TAB:
+ case KEY_UP:
+ case KEY_DOWN:
+ break;
+ case KEY_BACKSPACE:
+ case 8: /* ^H */
+ case 127: /* ^? */
+ if (pos) {
+ wattrset(dialog, dlg.inputbox.atr);
+ if (input_x == 0) {
+ show_x--;
+ } else
+ input_x--;
+
+ if (pos < len) {
+ for (i = pos - 1; i < len; i++) {
+ instr[i] = instr[i+1];
+ }
+ }
+
+ pos--;
+ len--;
+ instr[len] = '\0';
+ wmove(dialog, box_y, box_x);
+ for (i = 0; i < box_width; i++) {
+ if (!instr[show_x + i]) {
+ waddch(dialog, ' ');
+ break;
+ }
+ waddch(dialog, instr[show_x + i]);
+ }
+ wmove(dialog, box_y, input_x + box_x);
+ wrefresh(dialog);
+ }
+ continue;
+ case KEY_LEFT:
+ if (pos > 0) {
+ if (input_x > 0) {
+ wmove(dialog, box_y, --input_x + box_x);
+ } else if (input_x == 0) {
+ show_x--;
+ wmove(dialog, box_y, box_x);
+ for (i = 0; i < box_width; i++) {
+ if (!instr[show_x + i]) {
+ waddch(dialog, ' ');
+ break;
+ }
+ waddch(dialog, instr[show_x + i]);
+ }
+ wmove(dialog, box_y, box_x);
+ }
+ pos--;
+ }
+ continue;
+ case KEY_RIGHT:
+ if (pos < len) {
+ if (input_x < box_width - 1) {
+ wmove(dialog, box_y, ++input_x + box_x);
+ } else if (input_x == box_width - 1) {
+ show_x++;
+ wmove(dialog, box_y, box_x);
+ for (i = 0; i < box_width; i++) {
+ if (!instr[show_x + i]) {
+ waddch(dialog, ' ');
+ break;
+ }
+ waddch(dialog, instr[show_x + i]);
+ }
+ wmove(dialog, box_y, input_x + box_x);
+ }
+ pos++;
+ }
+ continue;
+ default:
+ if (key < 0x100 && isprint(key)) {
+ if (len < MAX_LEN) {
+ wattrset(dialog, dlg.inputbox.atr);
+ if (pos < len) {
+ for (i = len; i > pos; i--)
+ instr[i] = instr[i-1];
+ instr[pos] = key;
+ } else {
+ instr[len] = key;
+ }
+ pos++;
+ len++;
+ instr[len] = '\0';
+
+ if (input_x == box_width - 1) {
+ show_x++;
+ } else {
+ input_x++;
+ }
+
+ wmove(dialog, box_y, box_x);
+ for (i = 0; i < box_width; i++) {
+ if (!instr[show_x + i]) {
+ waddch(dialog, ' ');
+ break;
+ }
+ waddch(dialog, instr[show_x + i]);
+ }
+ wmove(dialog, box_y, input_x + box_x);
+ wrefresh(dialog);
+ } else
+ flash(); /* Alarm user about overflow */
+ continue;
+ }
+ }
+ }
+ switch (key) {
+ case 'O':
+ case 'o':
+ delwin(dialog);
+ return 0;
+ case 'H':
+ case 'h':
+ delwin(dialog);
+ return 1;
+ case KEY_UP:
+ case KEY_LEFT:
+ switch (button) {
+ case -1:
+ button = 1; /* Indicates "Help" button is selected */
+ print_buttons(dialog, height, width, 1);
+ break;
+ case 0:
+ button = -1; /* Indicates input box is selected */
+ print_buttons(dialog, height, width, 0);
+ wmove(dialog, box_y, box_x + input_x);
+ wrefresh(dialog);
+ break;
+ case 1:
+ button = 0; /* Indicates "OK" button is selected */
+ print_buttons(dialog, height, width, 0);
+ break;
+ }
+ break;
+ case TAB:
+ case KEY_DOWN:
+ case KEY_RIGHT:
+ switch (button) {
+ case -1:
+ button = 0; /* Indicates "OK" button is selected */
+ print_buttons(dialog, height, width, 0);
+ break;
+ case 0:
+ button = 1; /* Indicates "Help" button is selected */
+ print_buttons(dialog, height, width, 1);
+ break;
+ case 1:
+ button = -1; /* Indicates input box is selected */
+ print_buttons(dialog, height, width, 0);
+ wmove(dialog, box_y, box_x + input_x);
+ wrefresh(dialog);
+ break;
+ }
+ break;
+ case ' ':
+ case '\n':
+ delwin(dialog);
+ return (button == -1 ? 0 : button);
+ case 'X':
+ case 'x':
+ key = KEY_ESC;
+ break;
+ case KEY_ESC:
+ key = on_key_esc(dialog);
+ break;
+ case KEY_RESIZE:
+ delwin(dialog);
+ on_key_resize();
+ goto do_resize;
+ }
+ }
+
+ delwin(dialog);
+ return KEY_ESC; /* ESC pressed */
+}
--git a/backport/kconf/lxdialog/menubox.c b/backport/kconf/lxdialog/menubox.c
new file mode 100644
index 000000000000..58c2f8afe59b
--- /dev/null
+++ b/backport/kconf/lxdialog/menubox.c
@@ -0,0 +1,424 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * menubox.c -- implements the menu box
+ *
+ * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
+ * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcapw@cfw.com)
+ */
+
+/*
+ * Changes by Clifford Wolf (god@clifford.at)
+ *
+ * [ 1998-06-13 ]
+ *
+ * *) A bugfix for the Page-Down problem
+ *
+ * *) Formerly when I used Page Down and Page Up, the cursor would be set
+ * to the first position in the menu box. Now lxdialog is a bit
+ * smarter and works more like other menu systems (just have a look at
+ * it).
+ *
+ * *) Formerly if I selected something my scrolling would be broken because
+ * lxdialog is re-invoked by the Menuconfig shell script, can't
+ * remember the last scrolling position, and just sets it so that the
+ * cursor is at the bottom of the box. Now it writes the temporary file
+ * lxdialog.scrltmp which contains this information. The file is
+ * deleted by lxdialog if the user leaves a submenu or enters a new
+ * one, but it would be nice if Menuconfig could make another "rm -f"
+ * just to be sure. Just try it out - you will recognise a difference!
+ *
+ * [ 1998-06-14 ]
+ *
+ * *) Now lxdialog is crash-safe against broken "lxdialog.scrltmp" files
+ * and menus change their size on the fly.
+ *
+ * *) If for some reason the last scrolling position is not saved by
+ * lxdialog, it sets the scrolling so that the selected item is in the
+ * middle of the menu box, not at the bottom.
+ *
+ * 02 January 1999, Michael Elizabeth Chastain (mec@shout.net)
+ * Reset 'scroll' to 0 if the value from lxdialog.scrltmp is bogus.
+ * This fixes a bug in Menuconfig where using ' ' to descend into menus
+ * would leave mis-synchronized lxdialog.scrltmp files lying around,
+ * fscanf would read in 'scroll', and eventually that value would get used.
+ */
+
+#include "dialog.h"
+
+static int menu_width, item_x;
+
+/*
+ * Print menu item
+ */
+static void do_print_item(WINDOW * win, const char *item, int line_y,
+ int selected, int hotkey)
+{
+ int j;
+ char *menu_item = malloc(menu_width + 1);
+
+ strncpy(menu_item, item, menu_width - item_x);
+ menu_item[menu_width - item_x] = '\0';
+ j = first_alpha(menu_item, "YyNnMmHh");
+
+ /* Clear 'residue' of last item */
+ wattrset(win, dlg.menubox.atr);
+ wmove(win, line_y, 0);
+#if OLD_NCURSES
+ {
+ int i;
+ for (i = 0; i < menu_width; i++)
+ waddch(win, ' ');
+ }
+#else
+ wclrtoeol(win);
+#endif
+ wattrset(win, selected ? dlg.item_selected.atr : dlg.item.atr);
+ mvwaddstr(win, line_y, item_x, menu_item);
+ if (hotkey) {
+ wattrset(win, selected ? dlg.tag_key_selected.atr
+ : dlg.tag_key.atr);
+ mvwaddch(win, line_y, item_x + j, menu_item[j]);
+ }
+ if (selected) {
+ wmove(win, line_y, item_x + 1);
+ }
+ free(menu_item);
+ wrefresh(win);
+}
+
+#define print_item(index, choice, selected) \
+do { \
+ item_set(index); \
+ do_print_item(menu, item_str(), choice, selected, !item_is_tag(':')); \
+} while (0)
+
+/*
+ * Print the scroll indicators.
+ */
+static void print_arrows(WINDOW * win, int item_no, int scroll, int y, int x,
+ int height)
+{
+ int cur_y, cur_x;
+
+ getyx(win, cur_y, cur_x);
+
+ wmove(win, y, x);
+
+ if (scroll > 0) {
+ wattrset(win, dlg.uarrow.atr);
+ waddch(win, ACS_UARROW);
+ waddstr(win, "(-)");
+ } else {
+ wattrset(win, dlg.menubox.atr);
+ waddch(win, ACS_HLINE);
+ waddch(win, ACS_HLINE);
+ waddch(win, ACS_HLINE);
+ waddch(win, ACS_HLINE);
+ }
+
+ y = y + height + 1;
+ wmove(win, y, x);
+ wrefresh(win);
+
+ if ((height < item_no) && (scroll + height < item_no)) {
+ wattrset(win, dlg.darrow.atr);
+ waddch(win, ACS_DARROW);
+ waddstr(win, "(+)");
+ } else {
+ wattrset(win, dlg.menubox_border.atr);
+ waddch(win, ACS_HLINE);
+ waddch(win, ACS_HLINE);
+ waddch(win, ACS_HLINE);
+ waddch(win, ACS_HLINE);
+ }
+
+ wmove(win, cur_y, cur_x);
+ wrefresh(win);
+}
+
+/*
+ * Display the termination buttons.
+ */
+static void print_buttons(WINDOW * win, int height, int width, int selected)
+{
+ int x = width / 2 - 28;
+ int y = height - 2;
+
+ print_button(win, "Select", y, x, selected == 0);
+ print_button(win, " Exit ", y, x + 12, selected == 1);
+ print_button(win, " Help ", y, x + 24, selected == 2);
+ print_button(win, " Save ", y, x + 36, selected == 3);
+ print_button(win, " Load ", y, x + 48, selected == 4);
+
+ wmove(win, y, x + 1 + 12 * selected);
+ wrefresh(win);
+}
+
+/* scroll up n lines (n may be negative) */
+static void do_scroll(WINDOW *win, int *scroll, int n)
+{
+ /* Scroll menu up */
+ scrollok(win, TRUE);
+ wscrl(win, n);
+ scrollok(win, FALSE);
+ *scroll = *scroll + n;
+ wrefresh(win);
+}
+
+/*
+ * Display a menu for choosing among a number of options
+ */
+int dialog_menu(const char *title, const char *prompt,
+ const void *selected, int *s_scroll)
+{
+ int i, j, x, y, box_x, box_y;
+ int height, width, menu_height;
+ int key = 0, button = 0, scroll = 0, choice = 0;
+ int first_item = 0, max_choice;
+ WINDOW *dialog, *menu;
+
+do_resize:
+ height = getmaxy(stdscr);
+ width = getmaxx(stdscr);
+ if (height < MENUBOX_HEIGTH_MIN || width < MENUBOX_WIDTH_MIN)
+ return -ERRDISPLAYTOOSMALL;
+
+ height -= 4;
+ width -= 5;
+ menu_height = height - 10;
+
+ max_choice = MIN(menu_height, item_count());
+
+ /* center dialog box on screen */
+ x = (getmaxx(stdscr) - width) / 2;
+ y = (getmaxy(stdscr) - height) / 2;
+
+ draw_shadow(stdscr, y, x, height, width);
+
+ dialog = newwin(height, width, y, x);
+ keypad(dialog, TRUE);
+
+ draw_box(dialog, 0, 0, height, width,
+ dlg.dialog.atr, dlg.border.atr);
+ wattrset(dialog, dlg.border.atr);
+ mvwaddch(dialog, height - 3, 0, ACS_LTEE);
+ for (i = 0; i < width - 2; i++)
+ waddch(dialog, ACS_HLINE);
+ wattrset(dialog, dlg.dialog.atr);
+ wbkgdset(dialog, dlg.dialog.atr & A_COLOR);
+ waddch(dialog, ACS_RTEE);
+
+ print_title(dialog, title, width);
+
+ wattrset(dialog, dlg.dialog.atr);
+ print_autowrap(dialog, prompt, width - 2, 1, 3);
+
+ menu_width = width - 6;
+ box_y = height - menu_height - 5;
+ box_x = (width - menu_width) / 2 - 1;
+
+ /* create new window for the menu */
+ menu = subwin(dialog, menu_height, menu_width,
+ y + box_y + 1, x + box_x + 1);
+ keypad(menu, TRUE);
+
+ /* draw a box around the menu items */
+ draw_box(dialog, box_y, box_x, menu_height + 2, menu_width + 2,
+ dlg.menubox_border.atr, dlg.menubox.atr);
+
+ if (menu_width >= 80)
+ item_x = (menu_width - 70) / 2;
+ else
+ item_x = 4;
+
+ /* Set choice to default item */
+ item_foreach()
+ if (selected && (selected == item_data()))
+ choice = item_n();
+ /* get the saved scroll info */
+ scroll = *s_scroll;
+ if ((scroll <= choice) && (scroll + max_choice > choice) &&
+ (scroll >= 0) && (scroll + max_choice <= item_count())) {
+ first_item = scroll;
+ choice = choice - scroll;
+ } else {
+ scroll = 0;
+ }
+ if ((choice >= max_choice)) {
+ if (choice >= item_count() - max_choice / 2)
+ scroll = first_item = item_count() - max_choice;
+ else
+ scroll = first_item = choice - max_choice / 2;
+ choice = choice - scroll;
+ }
+
+ /* Print the menu */
+ for (i = 0; i < max_choice; i++) {
+ print_item(first_item + i, i, i == choice);
+ }
+
+ wnoutrefresh(menu);
+
+ print_arrows(dialog, item_count(), scroll,
+ box_y, box_x + item_x + 1, menu_height);
+
+ print_buttons(dialog, height, width, 0);
+ wmove(menu, choice, item_x + 1);
+ wrefresh(menu);
+
+ while (key != KEY_ESC) {
+ key = wgetch(menu);
+
+ if (key < 256 && isalpha(key))
+ key = tolower(key);
+
+ if (strchr("ynmh", key))
+ i = max_choice;
+ else {
+ for (i = choice + 1; i < max_choice; i++) {
+ item_set(scroll + i);
+ j = first_alpha(item_str(), "YyNnMmHh");
+ if (key == tolower(item_str()[j]))
+ break;
+ }
+ if (i == max_choice)
+ for (i = 0; i < max_choice; i++) {
+ item_set(scroll + i);
+ j = first_alpha(item_str(), "YyNnMmHh");
+ if (key == tolower(item_str()[j]))
+ break;
+ }
+ }
+
+ if (item_count() != 0 &&
+ (i < max_choice ||
+ key == KEY_UP || key == KEY_DOWN ||
+ key == '-' || key == '+' ||
+ key == KEY_PPAGE || key == KEY_NPAGE)) {
+ /* Remove highligt of current item */
+ print_item(scroll + choice, choice, FALSE);
+
+ if (key == KEY_UP || key == '-') {
+ if (choice < 2 && scroll) {
+ /* Scroll menu down */
+ do_scroll(menu, &scroll, -1);
+
+ print_item(scroll, 0, FALSE);
+ } else
+ choice = MAX(choice - 1, 0);
+
+ } else if (key == KEY_DOWN || key == '+') {
+ print_item(scroll+choice, choice, FALSE);
+
+ if ((choice > max_choice - 3) &&
+ (scroll + max_choice < item_count())) {
+ /* Scroll menu up */
+ do_scroll(menu, &scroll, 1);
+
+ print_item(scroll+max_choice - 1,
+ max_choice - 1, FALSE);
+ } else
+ choice = MIN(choice + 1, max_choice - 1);
+
+ } else if (key == KEY_PPAGE) {
+ scrollok(menu, TRUE);
+ for (i = 0; (i < max_choice); i++) {
+ if (scroll > 0) {
+ do_scroll(menu, &scroll, -1);
+ print_item(scroll, 0, FALSE);
+ } else {
+ if (choice > 0)
+ choice--;
+ }
+ }
+
+ } else if (key == KEY_NPAGE) {
+ for (i = 0; (i < max_choice); i++) {
+ if (scroll + max_choice < item_count()) {
+ do_scroll(menu, &scroll, 1);
+ print_item(scroll+max_choice-1,
+ max_choice - 1, FALSE);
+ } else {
+ if (choice + 1 < max_choice)
+ choice++;
+ }
+ }
+ } else
+ choice = i;
+
+ print_item(scroll + choice, choice, TRUE);
+
+ print_arrows(dialog, item_count(), scroll,
+ box_y, box_x + item_x + 1, menu_height);
+
+ wnoutrefresh(dialog);
+ wrefresh(menu);
+
+ continue; /* wait for another key press */
+ }
+
+ switch (key) {
+ case KEY_LEFT:
+ case TAB:
+ case KEY_RIGHT:
+ button = ((key == KEY_LEFT ? --button : ++button) < 0)
+ ? 4 : (button > 4 ? 0 : button);
+
+ print_buttons(dialog, height, width, button);
+ wrefresh(menu);
+ break;
+ case ' ':
+ case 's':
+ case 'y':
+ case 'n':
+ case 'm':
+ case '/':
+ case 'h':
+ case '?':
+ case 'z':
+ case '\n':
+ /* save scroll info */
+ *s_scroll = scroll;
+ delwin(menu);
+ delwin(dialog);
+ item_set(scroll + choice);
+ item_set_selected(1);
+ switch (key) {
+ case 'h':
+ case '?':
+ return 2;
+ case 's':
+ case 'y':
+ return 5;
+ case 'n':
+ return 6;
+ case 'm':
+ return 7;
+ case ' ':
+ return 8;
+ case '/':
+ return 9;
+ case 'z':
+ return 10;
+ case '\n':
+ return button;
+ }
+ return 0;
+ case 'e':
+ case 'x':
+ key = KEY_ESC;
+ break;
+ case KEY_ESC:
+ key = on_key_esc(menu);
+ break;
+ case KEY_RESIZE:
+ on_key_resize();
+ delwin(menu);
+ delwin(dialog);
+ goto do_resize;
+ }
+ }
+ delwin(menu);
+ delwin(dialog);
+ return key; /* ESC pressed */
+}
diff --git a/backport/kconf/lxdialog/textbox.c b/backport/kconf/lxdialog/textbox.c
new file mode 100644
index 000000000000..4e339b12664e
--- /dev/null
+++ b/backport/kconf/lxdialog/textbox.c
@@ -0,0 +1,395 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * textbox.c -- implements the text box
+ *
+ * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
+ * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
+ */
+
+#include "dialog.h"
+
+static void back_lines(int n);
+static void print_page(WINDOW *win, int height, int width, update_text_fn
+ update_text, void *data);
+static void print_line(WINDOW *win, int row, int width);
+static char *get_line(void);
+static void print_position(WINDOW * win);
+
+static int hscroll;
+static int begin_reached, end_reached, page_length;
+static char *buf;
+static char *page;
+
+/*
+ * refresh window content
+ */
+static void refresh_text_box(WINDOW *dialog, WINDOW *box, int boxh, int boxw,
+ int cur_y, int cur_x, update_text_fn update_text,
+ void *data)
+{
+ print_page(box, boxh, boxw, update_text, data);
+ print_position(dialog);
+ wmove(dialog, cur_y, cur_x); /* Restore cursor position */
+ wrefresh(dialog);
+}
+
+
+/*
+ * Display text from a file in a dialog box.
+ *
+ * keys is a null-terminated array
+ * update_text() may not add or remove any '\n' or '\0' in tbuf
+ */
+int dialog_textbox(const char *title, char *tbuf, int initial_height,
+ int initial_width, int *keys, int *_vscroll, int *_hscroll,
+ update_text_fn update_text, void *data)
+{
+ int i, x, y, cur_x, cur_y, key = 0;
+ int height, width, boxh, boxw;
+ WINDOW *dialog, *box;
+ bool done = false;
+
+ begin_reached = 1;
+ end_reached = 0;
+ page_length = 0;
+ hscroll = 0;
+ buf = tbuf;
+ page = buf; /* page is pointer to start of page to be displayed */
+
+ if (_vscroll && *_vscroll) {
+ begin_reached = 0;
+
+ for (i = 0; i < *_vscroll; i++)
+ get_line();
+ }
+ if (_hscroll)
+ hscroll = *_hscroll;
+
+do_resize:
+ getmaxyx(stdscr, height, width);
+ if (height < TEXTBOX_HEIGTH_MIN || width < TEXTBOX_WIDTH_MIN)
+ return -ERRDISPLAYTOOSMALL;
+ if (initial_height != 0)
+ height = initial_height;
+ else
+ if (height > 4)
+ height -= 4;
+ else
+ height = 0;
+ if (initial_width != 0)
+ width = initial_width;
+ else
+ if (width > 5)
+ width -= 5;
+ else
+ width = 0;
+
+ /* center dialog box on screen */
+ x = (getmaxx(stdscr) - width) / 2;
+ y = (getmaxy(stdscr) - height) / 2;
+
+ draw_shadow(stdscr, y, x, height, width);
+
+ dialog = newwin(height, width, y, x);
+ keypad(dialog, TRUE);
+
+ /* Create window for box region, used for scrolling text */
+ boxh = height - 4;
+ boxw = width - 2;
+ box = subwin(dialog, boxh, boxw, y + 1, x + 1);
+ wattrset(box, dlg.dialog.atr);
+ wbkgdset(box, dlg.dialog.atr & A_COLOR);
+
+ keypad(box, TRUE);
+
+ /* register the new window, along with its borders */
+ draw_box(dialog, 0, 0, height, width,
+ dlg.dialog.atr, dlg.border.atr);
+
+ wattrset(dialog, dlg.border.atr);
+ mvwaddch(dialog, height - 3, 0, ACS_LTEE);
+ for (i = 0; i < width - 2; i++)
+ waddch(dialog, ACS_HLINE);
+ wattrset(dialog, dlg.dialog.atr);
+ wbkgdset(dialog, dlg.dialog.atr & A_COLOR);
+ waddch(dialog, ACS_RTEE);
+
+ print_title(dialog, title, width);
+
+ print_button(dialog, " Exit ", height - 2, width / 2 - 4, TRUE);
+ wnoutrefresh(dialog);
+ getyx(dialog, cur_y, cur_x); /* Save cursor position */
+
+ /* Print first page of text */
+ attr_clear(box, boxh, boxw, dlg.dialog.atr);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y, cur_x, update_text,
+ data);
+
+ while (!done) {
+ key = wgetch(dialog);
+ switch (key) {
+ case 'E': /* Exit */
+ case 'e':
+ case 'X':
+ case 'x':
+ case 'q':
+ case '\n':
+ done = true;
+ break;
+ case 'g': /* First page */
+ case KEY_HOME:
+ if (!begin_reached) {
+ begin_reached = 1;
+ page = buf;
+ refresh_text_box(dialog, box, boxh, boxw,
+ cur_y, cur_x, update_text,
+ data);
+ }
+ break;
+ case 'G': /* Last page */
+ case KEY_END:
+
+ end_reached = 1;
+ /* point to last char in buf */
+ page = buf + strlen(buf);
+ back_lines(boxh);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
+ break;
+ case 'K': /* Previous line */
+ case 'k':
+ case KEY_UP:
+ if (begin_reached)
+ break;
+
+ back_lines(page_length + 1);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
+ break;
+ case 'B': /* Previous page */
+ case 'b':
+ case 'u':
+ case KEY_PPAGE:
+ if (begin_reached)
+ break;
+ back_lines(page_length + boxh);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
+ break;
+ case 'J': /* Next line */
+ case 'j':
+ case KEY_DOWN:
+ if (end_reached)
+ break;
+
+ back_lines(page_length - 1);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
+ break;
+ case KEY_NPAGE: /* Next page */
+ case ' ':
+ case 'd':
+ if (end_reached)
+ break;
+
+ begin_reached = 0;
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
+ break;
+ case '0': /* Beginning of line */
+ case 'H': /* Scroll left */
+ case 'h':
+ case KEY_LEFT:
+ if (hscroll <= 0)
+ break;
+
+ if (key == '0')
+ hscroll = 0;
+ else
+ hscroll--;
+ /* Reprint current page to scroll horizontally */
+ back_lines(page_length);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
+ break;
+ case 'L': /* Scroll right */
+ case 'l':
+ case KEY_RIGHT:
+ if (hscroll >= MAX_LEN)
+ break;
+ hscroll++;
+ /* Reprint current page to scroll horizontally */
+ back_lines(page_length);
+ refresh_text_box(dialog, box, boxh, boxw, cur_y,
+ cur_x, update_text, data);
+ break;
+ case KEY_ESC:
+ if (on_key_esc(dialog) == KEY_ESC)
+ done = true;
+ break;
+ case KEY_RESIZE:
+ back_lines(height);
+ delwin(box);
+ delwin(dialog);
+ on_key_resize();
+ goto do_resize;
+ default:
+ for (i = 0; keys[i]; i++) {
+ if (key == keys[i]) {
+ done = true;
+ break;
+ }
+ }
+ }
+ }
+ delwin(box);
+ delwin(dialog);
+ if (_vscroll) {
+ const char *s;
+
+ s = buf;
+ *_vscroll = 0;
+ back_lines(page_length);
+ while (s < page && (s = strchr(s, '\n'))) {
+ (*_vscroll)++;
+ s++;
+ }
+ }
+ if (_hscroll)
+ *_hscroll = hscroll;
+ return key;
+}
+
+/*
+ * Go back 'n' lines in text. Called by dialog_textbox().
+ * 'page' will be updated to point to the desired line in 'buf'.
+ */
+static void back_lines(int n)
+{
+ int i;
+
+ begin_reached = 0;
+ /* Go back 'n' lines */
+ for (i = 0; i < n; i++) {
+ if (*page == '\0') {
+ if (end_reached) {
+ end_reached = 0;
+ continue;
+ }
+ }
+ if (page == buf) {
+ begin_reached = 1;
+ return;
+ }
+ page--;
+ do {
+ if (page == buf) {
+ begin_reached = 1;
+ return;
+ }
+ page--;
+ } while (*page != '\n');
+ page++;
+ }
+}
+
+/*
+ * Print a new page of text.
+ */
+static void print_page(WINDOW *win, int height, int width, update_text_fn
+ update_text, void *data)
+{
+ int i, passed_end = 0;
+
+ if (update_text) {
+ char *end;
+
+ for (i = 0; i < height; i++)
+ get_line();
+ end = page;
+ back_lines(height);
+ update_text(buf, page - buf, end - buf, data);
+ }
+
+ page_length = 0;
+ for (i = 0; i < height; i++) {
+ print_line(win, i, width);
+ if (!passed_end)
+ page_length++;
+ if (end_reached && !passed_end)
+ passed_end = 1;
+ }
+ wnoutrefresh(win);
+}
+
+/*
+ * Print a new line of text.
+ */
+static void print_line(WINDOW * win, int row, int width)
+{
+ char *line;
+
+ line = get_line();
+ line += MIN(strlen(line), hscroll); /* Scroll horizontally */
+ wmove(win, row, 0); /* move cursor to correct line */
+ waddch(win, ' ');
+ waddnstr(win, line, MIN(strlen(line), width - 2));
+
+ /* Clear 'residue' of previous line */
+#if OLD_NCURSES
+ {
+ int x = getcurx(win);
+ int i;
+ for (i = 0; i < width - x; i++)
+ waddch(win, ' ');
+ }
+#else
+ wclrtoeol(win);
+#endif
+}
+
+/*
+ * Return current line of text. Called by dialog_textbox() and print_line().
+ * 'page' should point to start of current line before calling, and will be
+ * updated to point to start of next line.
+ */
+static char *get_line(void)
+{
+ int i = 0;
+ static char line[MAX_LEN + 1];
+
+ end_reached = 0;
+ while (*page != '\n') {
+ if (*page == '\0') {
+ end_reached = 1;
+ break;
+ } else if (i < MAX_LEN)
+ line[i++] = *(page++);
+ else {
+ /* Truncate lines longer than MAX_LEN characters */
+ if (i == MAX_LEN)
+ line[i++] = '\0';
+ page++;
+ }
+ }
+ if (i <= MAX_LEN)
+ line[i] = '\0';
+ if (!end_reached)
+ page++; /* move past '\n' */
+
+ return line;
+}
+
+/*
+ * Print current position
+ */
+static void print_position(WINDOW * win)
+{
+ int percent;
+
+ wattrset(win, dlg.position_indicator.atr);
+ wbkgdset(win, dlg.position_indicator.atr & A_COLOR);
+ percent = (page - buf) * 100 / strlen(buf);
+ wmove(win, getmaxy(win) - 3, getmaxx(win) - 9);
+ wprintw(win, "(%3d%%)", percent);
+}
diff --git a/backport/kconf/lxdialog/util.c b/backport/kconf/lxdialog/util.c
new file mode 100644
index 000000000000..3f78fb265136
--- /dev/null
+++ b/backport/kconf/lxdialog/util.c
@@ -0,0 +1,700 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * util.c
+ *
+ * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
+ * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
+ */
+
+#include <stdarg.h>
+
+#include "dialog.h"
+
+/* Needed in signal handler in mconf.c */
+int saved_x, saved_y;
+
+struct dialog_info dlg;
+
+static void set_mono_theme(void)
+{
+ dlg.screen.atr = A_NORMAL;
+ dlg.shadow.atr = A_NORMAL;
+ dlg.dialog.atr = A_NORMAL;
+ dlg.title.atr = A_BOLD;
+ dlg.border.atr = A_NORMAL;
+ dlg.button_active.atr = A_REVERSE;
+ dlg.button_inactive.atr = A_DIM;
+ dlg.button_key_active.atr = A_REVERSE;
+ dlg.button_key_inactive.atr = A_BOLD;
+ dlg.button_label_active.atr = A_REVERSE;
+ dlg.button_label_inactive.atr = A_NORMAL;
+ dlg.inputbox.atr = A_NORMAL;
+ dlg.inputbox_border.atr = A_NORMAL;
+ dlg.searchbox.atr = A_NORMAL;
+ dlg.searchbox_title.atr = A_BOLD;
+ dlg.searchbox_border.atr = A_NORMAL;
+ dlg.position_indicator.atr = A_BOLD;
+ dlg.menubox.atr = A_NORMAL;
+ dlg.menubox_border.atr = A_NORMAL;
+ dlg.item.atr = A_NORMAL;
+ dlg.item_selected.atr = A_REVERSE;
+ dlg.tag.atr = A_BOLD;
+ dlg.tag_selected.atr = A_REVERSE;
+ dlg.tag_key.atr = A_BOLD;
+ dlg.tag_key_selected.atr = A_REVERSE;
+ dlg.check.atr = A_BOLD;
+ dlg.check_selected.atr = A_REVERSE;
+ dlg.uarrow.atr = A_BOLD;
+ dlg.darrow.atr = A_BOLD;
+}
+
+#define DLG_COLOR(dialog, f, b, h) \
+do { \
+ dlg.dialog.fg = (f); \
+ dlg.dialog.bg = (b); \
+ dlg.dialog.hl = (h); \
+} while (0)
+
+static void set_classic_theme(void)
+{
+ DLG_COLOR(screen, COLOR_CYAN, COLOR_BLUE, true);
+ DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, true);
+ DLG_COLOR(dialog, COLOR_BLACK, COLOR_WHITE, false);
+ DLG_COLOR(title, COLOR_YELLOW, COLOR_WHITE, true);
+ DLG_COLOR(border, COLOR_WHITE, COLOR_WHITE, true);
+ DLG_COLOR(button_active, COLOR_WHITE, COLOR_BLUE, true);
+ DLG_COLOR(button_inactive, COLOR_BLACK, COLOR_WHITE, false);
+ DLG_COLOR(button_key_active, COLOR_WHITE, COLOR_BLUE, true);
+ DLG_COLOR(button_key_inactive, COLOR_RED, COLOR_WHITE, false);
+ DLG_COLOR(button_label_active, COLOR_YELLOW, COLOR_BLUE, true);
+ DLG_COLOR(button_label_inactive, COLOR_BLACK, COLOR_WHITE, true);
+ DLG_COLOR(inputbox, COLOR_BLACK, COLOR_WHITE, false);
+ DLG_COLOR(inputbox_border, COLOR_BLACK, COLOR_WHITE, false);
+ DLG_COLOR(searchbox, COLOR_BLACK, COLOR_WHITE, false);
+ DLG_COLOR(searchbox_title, COLOR_YELLOW, COLOR_WHITE, true);
+ DLG_COLOR(searchbox_border, COLOR_WHITE, COLOR_WHITE, true);
+ DLG_COLOR(position_indicator, COLOR_YELLOW, COLOR_WHITE, true);
+ DLG_COLOR(menubox, COLOR_BLACK, COLOR_WHITE, false);
+ DLG_COLOR(menubox_border, COLOR_WHITE, COLOR_WHITE, true);
+ DLG_COLOR(item, COLOR_BLACK, COLOR_WHITE, false);
+ DLG_COLOR(item_selected, COLOR_WHITE, COLOR_BLUE, true);
+ DLG_COLOR(tag, COLOR_YELLOW, COLOR_WHITE, true);
+ DLG_COLOR(tag_selected, COLOR_YELLOW, COLOR_BLUE, true);
+ DLG_COLOR(tag_key, COLOR_YELLOW, COLOR_WHITE, true);
+ DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_BLUE, true);
+ DLG_COLOR(check, COLOR_BLACK, COLOR_WHITE, false);
+ DLG_COLOR(check_selected, COLOR_WHITE, COLOR_BLUE, true);
+ DLG_COLOR(uarrow, COLOR_GREEN, COLOR_WHITE, true);
+ DLG_COLOR(darrow, COLOR_GREEN, COLOR_WHITE, true);
+}
+
+static void set_blackbg_theme(void)
+{
+ DLG_COLOR(screen, COLOR_RED, COLOR_BLACK, true);
+ DLG_COLOR(shadow, COLOR_BLACK, COLOR_BLACK, false);
+ DLG_COLOR(dialog, COLOR_WHITE, COLOR_BLACK, false);
+ DLG_COLOR(title, COLOR_RED, COLOR_BLACK, false);
+ DLG_COLOR(border, COLOR_BLACK, COLOR_BLACK, true);
+
+ DLG_COLOR(button_active, COLOR_YELLOW, COLOR_RED, false);
+ DLG_COLOR(button_inactive, COLOR_YELLOW, COLOR_BLACK, false);
+ DLG_COLOR(button_key_active, COLOR_YELLOW, COLOR_RED, true);
+ DLG_COLOR(button_key_inactive, COLOR_RED, COLOR_BLACK, false);
+ DLG_COLOR(button_label_active, COLOR_WHITE, COLOR_RED, false);
+ DLG_COLOR(button_label_inactive, COLOR_BLACK, COLOR_BLACK, true);
+
+ DLG_COLOR(inputbox, COLOR_YELLOW, COLOR_BLACK, false);
+ DLG_COLOR(inputbox_border, COLOR_YELLOW, COLOR_BLACK, false);
+
+ DLG_COLOR(searchbox, COLOR_YELLOW, COLOR_BLACK, false);
+ DLG_COLOR(searchbox_title, COLOR_YELLOW, COLOR_BLACK, true);
+ DLG_COLOR(searchbox_border, COLOR_BLACK, COLOR_BLACK, true);
+
+ DLG_COLOR(position_indicator, COLOR_RED, COLOR_BLACK, false);
+
+ DLG_COLOR(menubox, COLOR_YELLOW, COLOR_BLACK, false);
+ DLG_COLOR(menubox_border, COLOR_BLACK, COLOR_BLACK, true);
+
+ DLG_COLOR(item, COLOR_WHITE, COLOR_BLACK, false);
+ DLG_COLOR(item_selected, COLOR_WHITE, COLOR_RED, false);
+
+ DLG_COLOR(tag, COLOR_RED, COLOR_BLACK, false);
+ DLG_COLOR(tag_selected, COLOR_YELLOW, COLOR_RED, true);
+ DLG_COLOR(tag_key, COLOR_RED, COLOR_BLACK, false);
+ DLG_COLOR(tag_key_selected, COLOR_YELLOW, COLOR_RED, true);
+
+ DLG_COLOR(check, COLOR_YELLOW, COLOR_BLACK, false);
+ DLG_COLOR(check_selected, COLOR_YELLOW, COLOR_RED, true);
+
+ DLG_COLOR(uarrow, COLOR_RED, COLOR_BLACK, false);
+ DLG_COLOR(darrow, COLOR_RED, COLOR_BLACK, false);
+}
+
+static void set_bluetitle_theme(void)
+{
+ set_classic_theme();
+ DLG_COLOR(title, COLOR_BLUE, COLOR_WHITE, true);
+ DLG_COLOR(button_key_active, COLOR_YELLOW, COLOR_BLUE, true);
+ DLG_COLOR(button_label_active, COLOR_WHITE, COLOR_BLUE, true);
+ DLG_COLOR(searchbox_title, COLOR_BLUE, COLOR_WHITE, true);
+ DLG_COLOR(position_indicator, COLOR_BLUE, COLOR_WHITE, true);
+ DLG_COLOR(tag, COLOR_BLUE, COLOR_WHITE, true);
+ DLG_COLOR(tag_key, COLOR_BLUE, COLOR_WHITE, true);
+
+}
+
+/*
+ * Select color theme
+ */
+static int set_theme(const char *theme)
+{
+ int use_color = 1;
+ if (!theme)
+ set_bluetitle_theme();
+ else if (strcmp(theme, "classic") == 0)
+ set_classic_theme();
+ else if (strcmp(theme, "bluetitle") == 0)
+ set_bluetitle_theme();
+ else if (strcmp(theme, "blackbg") == 0)
+ set_blackbg_theme();
+ else if (strcmp(theme, "mono") == 0)
+ use_color = 0;
+
+ return use_color;
+}
+
+static void init_one_color(struct dialog_color *color)
+{
+ static int pair = 0;
+
+ pair++;
+ init_pair(pair, color->fg, color->bg);
+ if (color->hl)
+ color->atr = A_BOLD | COLOR_PAIR(pair);
+ else
+ color->atr = COLOR_PAIR(pair);
+}
+
+static void init_dialog_colors(void)
+{
+ init_one_color(&dlg.screen);
+ init_one_color(&dlg.shadow);
+ init_one_color(&dlg.dialog);
+ init_one_color(&dlg.title);
+ init_one_color(&dlg.border);
+ init_one_color(&dlg.button_active);
+ init_one_color(&dlg.button_inactive);
+ init_one_color(&dlg.button_key_active);
+ init_one_color(&dlg.button_key_inactive);
+ init_one_color(&dlg.button_label_active);
+ init_one_color(&dlg.button_label_inactive);
+ init_one_color(&dlg.inputbox);
+ init_one_color(&dlg.inputbox_border);
+ init_one_color(&dlg.searchbox);
+ init_one_color(&dlg.searchbox_title);
+ init_one_color(&dlg.searchbox_border);
+ init_one_color(&dlg.position_indicator);
+ init_one_color(&dlg.menubox);
+ init_one_color(&dlg.menubox_border);
+ init_one_color(&dlg.item);
+ init_one_color(&dlg.item_selected);
+ init_one_color(&dlg.tag);
+ init_one_color(&dlg.tag_selected);
+ init_one_color(&dlg.tag_key);
+ init_one_color(&dlg.tag_key_selected);
+ init_one_color(&dlg.check);
+ init_one_color(&dlg.check_selected);
+ init_one_color(&dlg.uarrow);
+ init_one_color(&dlg.darrow);
+}
+
+/*
+ * Setup for color display
+ */
+static void color_setup(const char *theme)
+{
+ int use_color;
+
+ use_color = set_theme(theme);
+ if (use_color && has_colors()) {
+ start_color();
+ init_dialog_colors();
+ } else
+ set_mono_theme();
+}
+
+/*
+ * Set window to attribute 'attr'
+ */
+void attr_clear(WINDOW * win, int height, int width, chtype attr)
+{
+ int i, j;
+
+ wattrset(win, attr);
+ for (i = 0; i < height; i++) {
+ wmove(win, i, 0);
+ for (j = 0; j < width; j++)
+ waddch(win, ' ');
+ }
+ touchwin(win);
+}
+
+void dialog_clear(void)
+{
+ int lines, columns;
+
+ lines = getmaxy(stdscr);
+ columns = getmaxx(stdscr);
+
+ attr_clear(stdscr, lines, columns, dlg.screen.atr);
+ /* Display background title if it exists ... - SLH */
+ if (dlg.backtitle != NULL) {
+ int i, len = 0, skip = 0;
+ struct subtitle_list *pos;
+
+ wattrset(stdscr, dlg.screen.atr);
+ mvwaddstr(stdscr, 0, 1, (char *)dlg.backtitle);
+
+ for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
+ /* 3 is for the arrow and spaces */
+ len += strlen(pos->text) + 3;
+ }
+
+ wmove(stdscr, 1, 1);
+ if (len > columns - 2) {
+ const char *ellipsis = "[...] ";
+ waddstr(stdscr, ellipsis);
+ skip = len - (columns - 2 - strlen(ellipsis));
+ }
+
+ for (pos = dlg.subtitles; pos != NULL; pos = pos->next) {
+ if (skip == 0)
+ waddch(stdscr, ACS_RARROW);
+ else
+ skip--;
+
+ if (skip == 0)
+ waddch(stdscr, ' ');
+ else
+ skip--;
+
+ if (skip < strlen(pos->text)) {
+ waddstr(stdscr, pos->text + skip);
+ skip = 0;
+ } else
+ skip -= strlen(pos->text);
+
+ if (skip == 0)
+ waddch(stdscr, ' ');
+ else
+ skip--;
+ }
+
+ for (i = len + 1; i < columns - 1; i++)
+ waddch(stdscr, ACS_HLINE);
+ }
+ wnoutrefresh(stdscr);
+}
+
+/*
+ * Do some initialization for dialog
+ */
+int init_dialog(const char *backtitle)
+{
+ int height, width;
+
+ initscr(); /* Init curses */
+
+ /* Get current cursor position for signal handler in mconf.c */
+ getyx(stdscr, saved_y, saved_x);
+
+ getmaxyx(stdscr, height, width);
+ if (height < WINDOW_HEIGTH_MIN || width < WINDOW_WIDTH_MIN) {
+ endwin();
+ return -ERRDISPLAYTOOSMALL;
+ }
+
+ dlg.backtitle = backtitle;
+ color_setup(getenv("MENUCONFIG_COLOR"));
+
+ keypad(stdscr, TRUE);
+ cbreak();
+ noecho();
+ dialog_clear();
+
+ return 0;
+}
+
+void set_dialog_backtitle(const char *backtitle)
+{
+ dlg.backtitle = backtitle;
+}
+
+void set_dialog_subtitles(struct subtitle_list *subtitles)
+{
+ dlg.subtitles = subtitles;
+}
+
+/*
+ * End using dialog functions.
+ */
+void end_dialog(int x, int y)
+{
+ /* move cursor back to original position */
+ move(y, x);
+ refresh();
+ endwin();
+}
+
+/* Print the title of the dialog. Center the title and truncate
+ * tile if wider than dialog (- 2 chars).
+ **/
+void print_title(WINDOW *dialog, const char *title, int width)
+{
+ if (title) {
+ int tlen = MIN(width - 2, strlen(title));
+ wattrset(dialog, dlg.title.atr);
+ mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');
+ mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);
+ waddch(dialog, ' ');
+ }
+}
+
+/*
+ * Print a string of text in a window, automatically wrap around to the
+ * next line if the string is too long to fit on one line. Newline
+ * characters '\n' are properly processed. We start on a new line
+ * if there is no room for at least 4 nonblanks following a double-space.
+ */
+void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x)
+{
+ int newl, cur_x, cur_y;
+ int prompt_len, room, wlen;
+ char tempstr[MAX_LEN + 1], *word, *sp, *sp2, *newline_separator = 0;
+
+ strcpy(tempstr, prompt);
+
+ prompt_len = strlen(tempstr);
+
+ if (prompt_len <= width - x * 2) { /* If prompt is short */
+ wmove(win, y, (width - prompt_len) / 2);
+ waddstr(win, tempstr);
+ } else {
+ cur_x = x;
+ cur_y = y;
+ newl = 1;
+ word = tempstr;
+ while (word && *word) {
+ sp = strpbrk(word, "\n ");
+ if (sp && *sp == '\n')
+ newline_separator = sp;
+
+ if (sp)
+ *sp++ = 0;
+
+ /* Wrap to next line if either the word does not fit,
+ or it is the first word of a new sentence, and it is
+ short, and the next word does not fit. */
+ room = width - cur_x;
+ wlen = strlen(word);
+ if (wlen > room ||
+ (newl && wlen < 4 && sp
+ && wlen + 1 + strlen(sp) > room
+ && (!(sp2 = strpbrk(sp, "\n "))
+ || wlen + 1 + (sp2 - sp) > room))) {
+ cur_y++;
+ cur_x = x;
+ }
+ wmove(win, cur_y, cur_x);
+ waddstr(win, word);
+ getyx(win, cur_y, cur_x);
+
+ /* Move to the next line if the word separator was a newline */
+ if (newline_separator) {
+ cur_y++;
+ cur_x = x;
+ newline_separator = 0;
+ } else
+ cur_x++;
+
+ if (sp && *sp == ' ') {
+ cur_x++; /* double space */
+ while (*++sp == ' ') ;
+ newl = 1;
+ } else
+ newl = 0;
+ word = sp;
+ }
+ }
+}
+
+/*
+ * Print a button
+ */
+void print_button(WINDOW * win, const char *label, int y, int x, int selected)
+{
+ int i, temp;
+
+ wmove(win, y, x);
+ wattrset(win, selected ? dlg.button_active.atr
+ : dlg.button_inactive.atr);
+ waddstr(win, "<");
+ temp = strspn(label, " ");
+ label += temp;
+ wattrset(win, selected ? dlg.button_label_active.atr
+ : dlg.button_label_inactive.atr);
+ for (i = 0; i < temp; i++)
+ waddch(win, ' ');
+ wattrset(win, selected ? dlg.button_key_active.atr
+ : dlg.button_key_inactive.atr);
+ waddch(win, label[0]);
+ wattrset(win, selected ? dlg.button_label_active.atr
+ : dlg.button_label_inactive.atr);
+ waddstr(win, (char *)label + 1);
+ wattrset(win, selected ? dlg.button_active.atr
+ : dlg.button_inactive.atr);
+ waddstr(win, ">");
+ wmove(win, y, x + temp + 1);
+}
+
+/*
+ * Draw a rectangular box with line drawing characters
+ */
+void
+draw_box(WINDOW * win, int y, int x, int height, int width,
+ chtype box, chtype border)
+{
+ int i, j;
+
+ wattrset(win, 0);
+ for (i = 0; i < height; i++) {
+ wmove(win, y + i, x);
+ for (j = 0; j < width; j++)
+ if (!i && !j)
+ waddch(win, border | ACS_ULCORNER);
+ else if (i == height - 1 && !j)
+ waddch(win, border | ACS_LLCORNER);
+ else if (!i && j == width - 1)
+ waddch(win, box | ACS_URCORNER);
+ else if (i == height - 1 && j == width - 1)
+ waddch(win, box | ACS_LRCORNER);
+ else if (!i)
+ waddch(win, border | ACS_HLINE);
+ else if (i == height - 1)
+ waddch(win, box | ACS_HLINE);
+ else if (!j)
+ waddch(win, border | ACS_VLINE);
+ else if (j == width - 1)
+ waddch(win, box | ACS_VLINE);
+ else
+ waddch(win, box | ' ');
+ }
+}
+
+/*
+ * Draw shadows along the right and bottom edge to give a more 3D look
+ * to the boxes
+ */
+void draw_shadow(WINDOW * win, int y, int x, int height, int width)
+{
+ int i;
+
+ if (has_colors()) { /* Whether terminal supports color? */
+ wattrset(win, dlg.shadow.atr);
+ wmove(win, y + height, x + 2);
+ for (i = 0; i < width; i++)
+ waddch(win, winch(win) & A_CHARTEXT);
+ for (i = y + 1; i < y + height + 1; i++) {
+ wmove(win, i, x + width);
+ waddch(win, winch(win) & A_CHARTEXT);
+ waddch(win, winch(win) & A_CHARTEXT);
+ }
+ wnoutrefresh(win);
+ }
+}
+
+/*
+ * Return the position of the first alphabetic character in a string.
+ */
+int first_alpha(const char *string, const char *exempt)
+{
+ int i, in_paren = 0, c;
+
+ for (i = 0; i < strlen(string); i++) {
+ c = tolower(string[i]);
+
+ if (strchr("<[(", c))
+ ++in_paren;
+ if (strchr(">])", c) && in_paren > 0)
+ --in_paren;
+
+ if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)
+ return i;
+ }
+
+ return 0;
+}
+
+/*
+ * ncurses uses ESC to detect escaped char sequences. This resutl in
+ * a small timeout before ESC is actually delivered to the application.
+ * lxdialog suggest <ESC> <ESC> which is correctly translated to two
+ * times esc. But then we need to ignore the second esc to avoid stepping
+ * out one menu too much. Filter away all escaped key sequences since
+ * keypad(FALSE) turn off ncurses support for escape sequences - and that's
+ * needed to make notimeout() do as expected.
+ */
+int on_key_esc(WINDOW *win)
+{
+ int key;
+ int key2;
+ int key3;
+
+ nodelay(win, TRUE);
+ keypad(win, FALSE);
+ key = wgetch(win);
+ key2 = wgetch(win);
+ do {
+ key3 = wgetch(win);
+ } while (key3 != ERR);
+ nodelay(win, FALSE);
+ keypad(win, TRUE);
+ if (key == KEY_ESC && key2 == ERR)
+ return KEY_ESC;
+ else if (key != ERR && key != KEY_ESC && key2 == ERR)
+ ungetch(key);
+
+ return -1;
+}
+
+/* redraw screen in new size */
+int on_key_resize(void)
+{
+ dialog_clear();
+ return KEY_RESIZE;
+}
+
+struct dialog_list *item_cur;
+struct dialog_list item_nil;
+struct dialog_list *item_head;
+
+void item_reset(void)
+{
+ struct dialog_list *p, *next;
+
+ for (p = item_head; p; p = next) {
+ next = p->next;
+ free(p);
+ }
+ item_head = NULL;
+ item_cur = &item_nil;
+}
+
+void item_make(const char *fmt, ...)
+{
+ va_list ap;
+ struct dialog_list *p = malloc(sizeof(*p));
+
+ if (item_head)
+ item_cur->next = p;
+ else
+ item_head = p;
+ item_cur = p;
+ memset(p, 0, sizeof(*p));
+
+ va_start(ap, fmt);
+ vsnprintf(item_cur->node.str, sizeof(item_cur->node.str), fmt, ap);
+ va_end(ap);
+}
+
+void item_add_str(const char *fmt, ...)
+{
+ va_list ap;
+ size_t avail;
+
+ avail = sizeof(item_cur->node.str) - strlen(item_cur->node.str);
+
+ va_start(ap, fmt);
+ vsnprintf(item_cur->node.str + strlen(item_cur->node.str),
+ avail, fmt, ap);
+ item_cur->node.str[sizeof(item_cur->node.str) - 1] = '\0';
+ va_end(ap);
+}
+
+void item_set_tag(char tag)
+{
+ item_cur->node.tag = tag;
+}
+void item_set_data(void *ptr)
+{
+ item_cur->node.data = ptr;
+}
+
+void item_set_selected(int val)
+{
+ item_cur->node.selected = val;
+}
+
+int item_activate_selected(void)
+{
+ item_foreach()
+ if (item_is_selected())
+ return 1;
+ return 0;
+}
+
+void *item_data(void)
+{
+ return item_cur->node.data;
+}
+
+char item_tag(void)
+{
+ return item_cur->node.tag;
+}
+
+int item_count(void)
+{
+ int n = 0;
+ struct dialog_list *p;
+
+ for (p = item_head; p; p = p->next)
+ n++;
+ return n;
+}
+
+void item_set(int n)
+{
+ int i = 0;
+ item_foreach()
+ if (i++ == n)
+ return;
+}
+
+int item_n(void)
+{
+ int n = 0;
+ struct dialog_list *p;
+
+ for (p = item_head; p; p = p->next) {
+ if (p == item_cur)
+ return n;
+ n++;
+ }
+ return 0;
+}
+
+const char *item_str(void)
+{
+ return item_cur->node.str;
+}
+
+int item_is_selected(void)
+{
+ return (item_cur->node.selected != 0);
+}
+
+int item_is_tag(char tag)
+{
+ return (item_cur->node.tag == tag);
+}
diff --git a/backport/kconf/lxdialog/yesno.c b/backport/kconf/lxdialog/yesno.c
new file mode 100644
index 000000000000..bcaac9b7bab2
--- /dev/null
+++ b/backport/kconf/lxdialog/yesno.c
@@ -0,0 +1,101 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * yesno.c -- implements the yes/no box
+ *
+ * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
+ * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
+ */
+
+#include "dialog.h"
+
+/*
+ * Display termination buttons
+ */
+static void print_buttons(WINDOW * dialog, int height, int width, int selected)
+{
+ int x = width / 2 - 10;
+ int y = height - 2;
+
+ print_button(dialog, " Yes ", y, x, selected == 0);
+ print_button(dialog, " No ", y, x + 13, selected == 1);
+
+ wmove(dialog, y, x + 1 + 13 * selected);
+ wrefresh(dialog);
+}
+
+/*
+ * Display a dialog box with two buttons - Yes and No
+ */
+int dialog_yesno(const char *title, const char *prompt, int height, int width)
+{
+ int i, x, y, key = 0, button = 0;
+ WINDOW *dialog;
+
+do_resize:
+ if (getmaxy(stdscr) < (height + YESNO_HEIGTH_MIN))
+ return -ERRDISPLAYTOOSMALL;
+ if (getmaxx(stdscr) < (width + YESNO_WIDTH_MIN))
+ return -ERRDISPLAYTOOSMALL;
+
+ /* center dialog box on screen */
+ x = (getmaxx(stdscr) - width) / 2;
+ y = (getmaxy(stdscr) - height) / 2;
+
+ draw_shadow(stdscr, y, x, height, width);
+
+ dialog = newwin(height, width, y, x);
+ keypad(dialog, TRUE);
+
+ draw_box(dialog, 0, 0, height, width,
+ dlg.dialog.atr, dlg.border.atr);
+ wattrset(dialog, dlg.border.atr);
+ mvwaddch(dialog, height - 3, 0, ACS_LTEE);
+ for (i = 0; i < width - 2; i++)
+ waddch(dialog, ACS_HLINE);
+ wattrset(dialog, dlg.dialog.atr);
+ waddch(dialog, ACS_RTEE);
+
+ print_title(dialog, title, width);
+
+ wattrset(dialog, dlg.dialog.atr);
+ print_autowrap(dialog, prompt, width - 2, 1, 3);
+
+ print_buttons(dialog, height, width, 0);
+
+ while (key != KEY_ESC) {
+ key = wgetch(dialog);
+ switch (key) {
+ case 'Y':
+ case 'y':
+ delwin(dialog);
+ return 0;
+ case 'N':
+ case 'n':
+ delwin(dialog);
+ return 1;
+
+ case TAB:
+ case KEY_LEFT:
+ case KEY_RIGHT:
+ button = ((key == KEY_LEFT ? --button : ++button) < 0) ? 1 : (button > 1 ? 0 : button);
+
+ print_buttons(dialog, height, width, button);
+ wrefresh(dialog);
+ break;
+ case ' ':
+ case '\n':
+ delwin(dialog);
+ return button;
+ case KEY_ESC:
+ key = on_key_esc(dialog);
+ break;
+ case KEY_RESIZE:
+ delwin(dialog);
+ on_key_resize();
+ goto do_resize;
+ }
+ }
+
+ delwin(dialog);
+ return key; /* ESC pressed */
+}
diff --git a/backport/kconf/mconf-cfg.sh b/backport/kconf/mconf-cfg.sh
new file mode 100755
index 000000000000..b520e407a8eb
--- /dev/null
+++ b/backport/kconf/mconf-cfg.sh
@@ -0,0 +1,52 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+PKG="ncursesw"
+PKG2="ncurses"
+
+if [ -n "$(command -v pkg-config)" ]; then
+ if pkg-config --exists $PKG; then
+ echo cflags=\"$(pkg-config --cflags $PKG)\"
+ echo libs=\"$(pkg-config --libs $PKG)\"
+ exit 0
+ fi
+
+ if pkg-config --exists $PKG2; then
+ echo cflags=\"$(pkg-config --cflags $PKG2)\"
+ echo libs=\"$(pkg-config --libs $PKG2)\"
+ exit 0
+ fi
+fi
+
+# Check the default paths in case pkg-config is not installed.
+# (Even if it is installed, some distributions such as openSUSE cannot
+# find ncurses by pkg-config.)
+if [ -f /usr/include/ncursesw/ncurses.h ]; then
+ echo cflags=\"-D_GNU_SOURCE -I/usr/include/ncursesw\"
+ echo libs=\"-lncursesw\"
+ exit 0
+fi
+
+if [ -f /usr/include/ncurses/ncurses.h ]; then
+ echo cflags=\"-D_GNU_SOURCE -I/usr/include/ncurses\"
+ echo libs=\"-lncurses\"
+ exit 0
+fi
+
+# As a final fallback before giving up, check if $HOSTCC knows of a default
+# ncurses installation (e.g. from a vendor-specific sysroot).
+if echo '#include <ncurses.h>' | ${HOSTCC} -E - >/dev/null 2>&1; then
+ echo cflags=\"-D_GNU_SOURCE\"
+ echo libs=\"-lncurses\"
+ exit 0
+fi
+
+echo >&2 "*"
+echo >&2 "* Unable to find the ncurses package."
+echo >&2 "* Install ncurses (ncurses-devel or libncurses-dev"
+echo >&2 "* depending on your distribution)."
+echo >&2 "*"
+echo >&2 "* You may also need to install pkg-config to find the"
+echo >&2 "* ncurses installed in a non-default location."
+echo >&2 "*"
+exit 1
diff --git a/backport/kconf/mconf.c b/backport/kconf/mconf.c
new file mode 100644
index 000000000000..9d3cf510562f
--- /dev/null
+++ b/backport/kconf/mconf.c
@@ -0,0 +1,1037 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ *
+ * Introduced single menu mode (show all sub-menus in one large tree).
+ * 2002-11-06 Petr Baudis <pasky@ucw.cz>
+ *
+ * i18n, 2005, Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <signal.h>
+#include <unistd.h>
+
+#include "lkc.h"
+#include "lxdialog/dialog.h"
+
+#define JUMP_NB 9
+
+static const char mconf_readme[] =
+"Overview\n"
+"--------\n"
+"This interface lets you select features and parameters for the build.\n"
+"Features can either be built-in, modularized, or ignored. Parameters\n"
+"must be entered in as decimal or hexadecimal numbers or text.\n"
+"\n"
+"Menu items beginning with following braces represent features that\n"
+" [ ] can be built in or removed\n"
+" < > can be built in, modularized or removed\n"
+" { } can be built in or modularized (selected by other feature)\n"
+" - - are selected by other feature,\n"
+"while *, M or whitespace inside braces means to build in, build as\n"
+"a module or to exclude the feature respectively.\n"
+"\n"
+"To change any of these features, highlight it with the cursor\n"
+"keys and press <Y> to build it in, <M> to make it a module or\n"
+"<N> to remove it. You may also press the <Space Bar> to cycle\n"
+"through the available options (i.e. Y->N->M->Y).\n"
+"\n"
+"Some additional keyboard hints:\n"
+"\n"
+"Menus\n"
+"----------\n"
+"o Use the Up/Down arrow keys (cursor keys) to highlight the item you\n"
+" wish to change or the submenu you wish to select and press <Enter>.\n"
+" Submenus are designated by \"--->\", empty ones by \"----\".\n"
+"\n"
+" Shortcut: Press the option's highlighted letter (hotkey).\n"
+" Pressing a hotkey more than once will sequence\n"
+" through all visible items which use that hotkey.\n"
+"\n"
+" You may also use the <PAGE UP> and <PAGE DOWN> keys to scroll\n"
+" unseen options into view.\n"
+"\n"
+"o To exit a menu use the cursor keys to highlight the <Exit> button\n"
+" and press <ENTER>.\n"
+"\n"
+" Shortcut: Press <ESC><ESC> or <E> or <X> if there is no hotkey\n"
+" using those letters. You may press a single <ESC>, but\n"
+" there is a delayed response which you may find annoying.\n"
+"\n"
+" Also, the <TAB> and cursor keys will cycle between <Select>,\n"
+" <Exit>, <Help>, <Save>, and <Load>.\n"
+"\n"
+"o To get help with an item, use the cursor keys to highlight <Help>\n"
+" and press <ENTER>.\n"
+"\n"
+" Shortcut: Press <H> or <?>.\n"
+"\n"
+"o To toggle the display of hidden options, press <Z>.\n"
+"\n"
+"\n"
+"Radiolists (Choice lists)\n"
+"-----------\n"
+"o Use the cursor keys to select the option you wish to set and press\n"
+" <S> or the <SPACE BAR>.\n"
+"\n"
+" Shortcut: Press the first letter of the option you wish to set then\n"
+" press <S> or <SPACE BAR>.\n"
+"\n"
+"o To see available help for the item, use the cursor keys to highlight\n"
+" <Help> and Press <ENTER>.\n"
+"\n"
+" Shortcut: Press <H> or <?>.\n"
+"\n"
+" Also, the <TAB> and cursor keys will cycle between <Select> and\n"
+" <Help>\n"
+"\n"
+"\n"
+"Data Entry\n"
+"-----------\n"
+"o Enter the requested information and press <ENTER>\n"
+" If you are entering hexadecimal values, it is not necessary to\n"
+" add the '0x' prefix to the entry.\n"
+"\n"
+"o For help, use the <TAB> or cursor keys to highlight the help option\n"
+" and press <ENTER>. You can try <TAB><H> as well.\n"
+"\n"
+"\n"
+"Text Box (Help Window)\n"
+"--------\n"
+"o Use the cursor keys to scroll up/down/left/right. The VI editor\n"
+" keys h,j,k,l function here as do <u>, <d>, <SPACE BAR> and <B> for\n"
+" those who are familiar with less and lynx.\n"
+"\n"
+"o Press <E>, <X>, <q>, <Enter> or <Esc><Esc> to exit.\n"
+"\n"
+"\n"
+"Alternate Configuration Files\n"
+"-----------------------------\n"
+"Menuconfig supports the use of alternate configuration files for\n"
+"those who, for various reasons, find it necessary to switch\n"
+"between different configurations.\n"
+"\n"
+"The <Save> button will let you save the current configuration to\n"
+"a file of your choosing. Use the <Load> button to load a previously\n"
+"saved alternate configuration.\n"
+"\n"
+"Even if you don't use alternate configuration files, but you find\n"
+"during a Menuconfig session that you have completely messed up your\n"
+"settings, you may use the <Load> button to restore your previously\n"
+"saved settings from \".config\" without restarting Menuconfig.\n"
+"\n"
+"Other information\n"
+"-----------------\n"
+"If you use Menuconfig in an XTERM window, make sure you have your\n"
+"$TERM variable set to point to an xterm definition which supports\n"
+"color. Otherwise, Menuconfig will look rather bad. Menuconfig will\n"
+"not display correctly in an RXVT window because rxvt displays only one\n"
+"intensity of color, bright.\n"
+"\n"
+"Menuconfig will display larger menus on screens or xterms which are\n"
+"set to display more than the standard 25 row by 80 column geometry.\n"
+"In order for this to work, the \"stty size\" command must be able to\n"
+"display the screen's current row and column geometry. I STRONGLY\n"
+"RECOMMEND that you make sure you do NOT have the shell variables\n"
+"LINES and COLUMNS exported into your environment. Some distributions\n"
+"export those variables via /etc/profile. Some ncurses programs can\n"
+"become confused when those variables (LINES & COLUMNS) don't reflect\n"
+"the true screen size.\n"
+"\n"
+"Optional personality available\n"
+"------------------------------\n"
+"If you prefer to have all of the options listed in a single menu,\n"
+"rather than the default multimenu hierarchy, run the menuconfig with\n"
+"MENUCONFIG_MODE environment variable set to single_menu. Example:\n"
+"\n"
+"make MENUCONFIG_MODE=single_menu menuconfig\n"
+"\n"
+"<Enter> will then unroll the appropriate category, or enfold it if it\n"
+"is already unrolled.\n"
+"\n"
+"Note that this mode can eventually be a little more CPU expensive\n"
+"(especially with a larger number of unrolled categories) than the\n"
+"default mode.\n"
+"\n"
+"Different color themes available\n"
+"--------------------------------\n"
+"It is possible to select different color themes using the variable\n"
+"MENUCONFIG_COLOR. To select a theme use:\n"
+"\n"
+"make MENUCONFIG_COLOR=<theme> menuconfig\n"
+"\n"
+"Available themes are\n"
+" mono => selects colors suitable for monochrome displays\n"
+" blackbg => selects a color scheme with black background\n"
+" classic => theme with blue background. The classic look\n"
+" bluetitle => an LCD friendly version of classic. (default)\n"
+"\n",
+menu_instructions[] =
+ "Arrow keys navigate the menu. "
+ "<Enter> selects submenus ---> (or empty submenus ----). "
+ "Highlighted letters are hotkeys. "
+ "Pressing <Y> includes, <N> excludes, <M> modularizes features. "
+ "Press <Esc><Esc> to exit, <?> for Help, </> for Search. "
+ "Legend: [*] built-in [ ] excluded <M> module < > module capable",
+radiolist_instructions[] =
+ "Use the arrow keys to navigate this window or "
+ "press the hotkey of the item you wish to select "
+ "followed by the <SPACE BAR>. "
+ "Press <?> for additional information about this option.",
+inputbox_instructions_int[] =
+ "Please enter a decimal value. "
+ "Fractions will not be accepted. "
+ "Use the <TAB> key to move from the input field to the buttons below it.",
+inputbox_instructions_hex[] =
+ "Please enter a hexadecimal value. "
+ "Use the <TAB> key to move from the input field to the buttons below it.",
+inputbox_instructions_string[] =
+ "Please enter a string value. "
+ "Use the <TAB> key to move from the input field to the buttons below it.",
+setmod_text[] =
+ "This feature depends on another which has been configured as a module.\n"
+ "As a result, this feature will be built as a module.",
+load_config_text[] =
+ "Enter the name of the configuration file you wish to load. "
+ "Accept the name shown to restore the configuration you "
+ "last retrieved. Leave blank to abort.",
+load_config_help[] =
+ "\n"
+ "For various reasons, one may wish to keep several different\n"
+ "configurations available on a single machine.\n"
+ "\n"
+ "If you have saved a previous configuration in a file other than the\n"
+ "default one, entering its name here will allow you to modify that\n"
+ "configuration.\n"
+ "\n"
+ "If you are uncertain, then you have probably never used alternate\n"
+ "configuration files. You should therefore leave this blank to abort.\n",
+save_config_text[] =
+ "Enter a filename to which this configuration should be saved "
+ "as an alternate. Leave blank to abort.",
+save_config_help[] =
+ "\n"
+ "For various reasons, one may wish to keep different configurations\n"
+ "available on a single machine.\n"
+ "\n"
+ "Entering a file name here will allow you to later retrieve, modify\n"
+ "and use the current configuration as an alternate to whatever\n"
+ "configuration options you have selected at that time.\n"
+ "\n"
+ "If you are uncertain what all this means then you should probably\n"
+ "leave this blank.\n",
+search_help[] =
+ "\n"
+ "Search for symbols and display their relations.\n"
+ "Regular expressions are allowed.\n"
+ "Example: search for \"^FOO\"\n"
+ "Result:\n"
+ "-----------------------------------------------------------------\n"
+ "Symbol: FOO [=m]\n"
+ "Type : tristate\n"
+ "Prompt: Foo bus is used to drive the bar HW\n"
+ " Location:\n"
+ " -> Bus options (PCI, PCMCIA, EISA, ISA)\n"
+ " -> PCI support (PCI [=y])\n"
+ "(1) -> PCI access mode (<choice> [=y])\n"
+ " Defined at drivers/pci/Kconfig:47\n"
+ " Depends on: X86_LOCAL_APIC && X86_IO_APIC || IA64\n"
+ " Selects: LIBCRC32\n"
+ " Selected by: BAR [=n]\n"
+ "-----------------------------------------------------------------\n"
+ "o The line 'Type:' shows the type of the configuration option for\n"
+ " this symbol (bool, tristate, string, ...)\n"
+ "o The line 'Prompt:' shows the text used in the menu structure for\n"
+ " this symbol\n"
+ "o The 'Defined at' line tells at what file / line number the symbol\n"
+ " is defined\n"
+ "o The 'Depends on:' line tells what symbols need to be defined for\n"
+ " this symbol to be visible in the menu (selectable)\n"
+ "o The 'Location:' lines tells where in the menu structure this symbol\n"
+ " is located\n"
+ " A location followed by a [=y] indicates that this is a\n"
+ " selectable menu item - and the current value is displayed inside\n"
+ " brackets.\n"
+ " Press the key in the (#) prefix to jump directly to that\n"
+ " location. You will be returned to the current search results\n"
+ " after exiting this new menu.\n"
+ "o The 'Selects:' line tells what symbols will be automatically\n"
+ " selected if this symbol is selected (y or m)\n"
+ "o The 'Selected by' line tells what symbol has selected this symbol\n"
+ "\n"
+ "Only relevant lines are shown.\n"
+ "\n\n"
+ "Search examples:\n"
+ "Examples: USB => find all symbols containing USB\n"
+ " ^USB => find all symbols starting with USB\n"
+ " USB$ => find all symbols ending with USB\n"
+ "\n";
+
+static int indent;
+static struct menu *current_menu;
+static int child_count;
+static int single_menu_mode;
+static int show_all_options;
+static int save_and_exit;
+static int silent;
+
+static void conf(struct menu *menu, struct menu *active_menu);
+static void conf_choice(struct menu *menu);
+static void conf_string(struct menu *menu);
+static void conf_load(void);
+static void conf_save(void);
+static int show_textbox_ext(const char *title, char *text, int r, int c,
+ int *keys, int *vscroll, int *hscroll,
+ update_text_fn update_text, void *data);
+static void show_textbox(const char *title, const char *text, int r, int c);
+static void show_helptext(const char *title, const char *text);
+static void show_help(struct menu *menu);
+
+static char filename[PATH_MAX+1];
+static void set_config_filename(const char *config_filename)
+{
+ static char menu_backtitle[PATH_MAX+128];
+
+ snprintf(menu_backtitle, sizeof(menu_backtitle), "%s - %s",
+ config_filename, rootmenu.prompt->text);
+ set_dialog_backtitle(menu_backtitle);
+
+ snprintf(filename, sizeof(filename), "%s", config_filename);
+}
+
+struct subtitle_part {
+ struct list_head entries;
+ const char *text;
+};
+static LIST_HEAD(trail);
+
+static struct subtitle_list *subtitles;
+static void set_subtitle(void)
+{
+ struct subtitle_part *sp;
+ struct subtitle_list *pos, *tmp;
+
+ for (pos = subtitles; pos != NULL; pos = tmp) {
+ tmp = pos->next;
+ free(pos);
+ }
+
+ subtitles = NULL;
+ list_for_each_entry(sp, &trail, entries) {
+ if (sp->text) {
+ if (pos) {
+ pos->next = xcalloc(1, sizeof(*pos));
+ pos = pos->next;
+ } else {
+ subtitles = pos = xcalloc(1, sizeof(*pos));
+ }
+ pos->text = sp->text;
+ }
+ }
+
+ set_dialog_subtitles(subtitles);
+}
+
+static void reset_subtitle(void)
+{
+ struct subtitle_list *pos, *tmp;
+
+ for (pos = subtitles; pos != NULL; pos = tmp) {
+ tmp = pos->next;
+ free(pos);
+ }
+ subtitles = NULL;
+ set_dialog_subtitles(subtitles);
+}
+
+struct search_data {
+ struct list_head *head;
+ struct menu **targets;
+ int *keys;
+};
+
+static void update_text(char *buf, size_t start, size_t end, void *_data)
+{
+ struct search_data *data = _data;
+ struct jump_key *pos;
+ int k = 0;
+
+ list_for_each_entry(pos, data->head, entries) {
+ if (pos->offset >= start && pos->offset < end) {
+ char header[4];
+
+ if (k < JUMP_NB) {
+ int key = '0' + (pos->index % JUMP_NB) + 1;
+
+ sprintf(header, "(%c)", key);
+ data->keys[k] = key;
+ data->targets[k] = pos->target;
+ k++;
+ } else {
+ sprintf(header, " ");
+ }
+
+ memcpy(buf + pos->offset, header, sizeof(header) - 1);
+ }
+ }
+ data->keys[k] = 0;
+}
+
+static void search_conf(void)
+{
+ struct symbol **sym_arr;
+ struct gstr res;
+ struct gstr title;
+ char *dialog_input;
+ int dres, vscroll = 0, hscroll = 0;
+ bool again;
+ struct gstr sttext;
+ struct subtitle_part stpart;
+
+ title = str_new();
+ str_printf( &title, "Enter (sub)string or regexp to search for "
+ "(with or without \"%s\")", CONFIG_);
+
+again:
+ dialog_clear();
+ dres = dialog_inputbox("Search Configuration Parameter",
+ str_get(&title),
+ 10, 75, "");
+ switch (dres) {
+ case 0:
+ break;
+ case 1:
+ show_helptext("Search Configuration", search_help);
+ goto again;
+ default:
+ str_free(&title);
+ return;
+ }
+
+ /* strip the prefix if necessary */
+ dialog_input = dialog_input_result;
+ if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
+ dialog_input += strlen(CONFIG_);
+
+ sttext = str_new();
+ str_printf(&sttext, "Search (%s)", dialog_input_result);
+ stpart.text = str_get(&sttext);
+ list_add_tail(&stpart.entries, &trail);
+
+ sym_arr = sym_re_search(dialog_input);
+ do {
+ LIST_HEAD(head);
+ struct menu *targets[JUMP_NB];
+ int keys[JUMP_NB + 1], i;
+ struct search_data data = {
+ .head = &head,
+ .targets = targets,
+ .keys = keys,
+ };
+ struct jump_key *pos, *tmp;
+
+ res = get_relations_str(sym_arr, &head);
+ set_subtitle();
+ dres = show_textbox_ext("Search Results", (char *)
+ str_get(&res), 0, 0, keys, &vscroll,
+ &hscroll, &update_text, (void *)
+ &data);
+ again = false;
+ for (i = 0; i < JUMP_NB && keys[i]; i++)
+ if (dres == keys[i]) {
+ conf(targets[i]->parent, targets[i]);
+ again = true;
+ }
+ str_free(&res);
+ list_for_each_entry_safe(pos, tmp, &head, entries)
+ free(pos);
+ } while (again);
+ free(sym_arr);
+ str_free(&title);
+ list_del(trail.prev);
+ str_free(&sttext);
+}
+
+static void build_conf(struct menu *menu)
+{
+ struct symbol *sym;
+ struct property *prop;
+ struct menu *child;
+ int type, tmp, doint = 2;
+ tristate val;
+ char ch;
+ bool visible;
+
+ /*
+ * note: menu_is_visible() has side effect that it will
+ * recalc the value of the symbol.
+ */
+ visible = menu_is_visible(menu);
+ if (show_all_options && !menu_has_prompt(menu))
+ return;
+ else if (!show_all_options && !visible)
+ return;
+
+ sym = menu->sym;
+ prop = menu->prompt;
+ if (!sym) {
+ if (prop && menu != current_menu) {
+ const char *prompt = menu_get_prompt(menu);
+ switch (prop->type) {
+ case P_MENU:
+ child_count++;
+ if (single_menu_mode) {
+ item_make("%s%*c%s",
+ menu->data ? "-->" : "++>",
+ indent + 1, ' ', prompt);
+ } else
+ item_make(" %*c%s %s",
+ indent + 1, ' ', prompt,
+ menu_is_empty(menu) ? "----" : "--->");
+ item_set_tag('m');
+ item_set_data(menu);
+ if (single_menu_mode && menu->data)
+ goto conf_childs;
+ return;
+ case P_COMMENT:
+ if (prompt) {
+ child_count++;
+ item_make(" %*c*** %s ***", indent + 1, ' ', prompt);
+ item_set_tag(':');
+ item_set_data(menu);
+ }
+ break;
+ default:
+ if (prompt) {
+ child_count++;
+ item_make("---%*c%s", indent + 1, ' ', prompt);
+ item_set_tag(':');
+ item_set_data(menu);
+ }
+ }
+ } else
+ doint = 0;
+ goto conf_childs;
+ }
+
+ type = sym_get_type(sym);
+ if (sym_is_choice(sym)) {
+ struct symbol *def_sym = sym_get_choice_value(sym);
+ struct menu *def_menu = NULL;
+
+ child_count++;
+ for (child = menu->list; child; child = child->next) {
+ if (menu_is_visible(child) && child->sym == def_sym)
+ def_menu = child;
+ }
+
+ val = sym_get_tristate_value(sym);
+ if (sym_is_changeable(sym)) {
+ switch (type) {
+ case S_BOOLEAN:
+ item_make("[%c]", val == no ? ' ' : '*');
+ break;
+ case S_TRISTATE:
+ switch (val) {
+ case yes: ch = '*'; break;
+ case mod: ch = 'M'; break;
+ default: ch = ' '; break;
+ }
+ item_make("<%c>", ch);
+ break;
+ }
+ item_set_tag('t');
+ item_set_data(menu);
+ } else {
+ item_make(" ");
+ item_set_tag(def_menu ? 't' : ':');
+ item_set_data(menu);
+ }
+
+ item_add_str("%*c%s", indent + 1, ' ', menu_get_prompt(menu));
+ if (val == yes) {
+ if (def_menu) {
+ item_add_str(" (%s)", menu_get_prompt(def_menu));
+ item_add_str(" --->");
+ if (def_menu->list) {
+ indent += 2;
+ build_conf(def_menu);
+ indent -= 2;
+ }
+ }
+ return;
+ }
+ } else {
+ if (menu == current_menu) {
+ item_make("---%*c%s", indent + 1, ' ', menu_get_prompt(menu));
+ item_set_tag(':');
+ item_set_data(menu);
+ goto conf_childs;
+ }
+ child_count++;
+ val = sym_get_tristate_value(sym);
+ if (sym_is_choice_value(sym) && val == yes) {
+ item_make(" ");
+ item_set_tag(':');
+ item_set_data(menu);
+ } else {
+ switch (type) {
+ case S_BOOLEAN:
+ if (sym_is_changeable(sym))
+ item_make("[%c]", val == no ? ' ' : '*');
+ else
+ item_make("-%c-", val == no ? ' ' : '*');
+ item_set_tag('t');
+ item_set_data(menu);
+ break;
+ case S_TRISTATE:
+ switch (val) {
+ case yes: ch = '*'; break;
+ case mod: ch = 'M'; break;
+ default: ch = ' '; break;
+ }
+ if (sym_is_changeable(sym)) {
+ if (sym->rev_dep.tri == mod)
+ item_make("{%c}", ch);
+ else
+ item_make("<%c>", ch);
+ } else
+ item_make("-%c-", ch);
+ item_set_tag('t');
+ item_set_data(menu);
+ break;
+ default:
+ tmp = 2 + strlen(sym_get_string_value(sym)); /* () = 2 */
+ item_make("(%s)", sym_get_string_value(sym));
+ tmp = indent - tmp + 4;
+ if (tmp < 0)
+ tmp = 0;
+ item_add_str("%*c%s%s", tmp, ' ', menu_get_prompt(menu),
+ (sym_has_value(sym) || !sym_is_changeable(sym)) ?
+ "" : " (NEW)");
+ item_set_tag('s');
+ item_set_data(menu);
+ goto conf_childs;
+ }
+ }
+ item_add_str("%*c%s%s", indent + 1, ' ', menu_get_prompt(menu),
+ (sym_has_value(sym) || !sym_is_changeable(sym)) ?
+ "" : " (NEW)");
+ if (menu->prompt->type == P_MENU) {
+ item_add_str(" %s", menu_is_empty(menu) ? "----" : "--->");
+ return;
+ }
+ }
+
+conf_childs:
+ indent += doint;
+ for (child = menu->list; child; child = child->next)
+ build_conf(child);
+ indent -= doint;
+}
+
+static void conf(struct menu *menu, struct menu *active_menu)
+{
+ struct menu *submenu;
+ const char *prompt = menu_get_prompt(menu);
+ struct subtitle_part stpart;
+ struct symbol *sym;
+ int res;
+ int s_scroll = 0;
+
+ if (menu != &rootmenu)
+ stpart.text = menu_get_prompt(menu);
+ else
+ stpart.text = NULL;
+ list_add_tail(&stpart.entries, &trail);
+
+ while (1) {
+ item_reset();
+ current_menu = menu;
+ build_conf(menu);
+ if (!child_count)
+ break;
+ set_subtitle();
+ dialog_clear();
+ res = dialog_menu(prompt ? prompt : "Main Menu",
+ menu_instructions,
+ active_menu, &s_scroll);
+ if (res == 1 || res == KEY_ESC || res == -ERRDISPLAYTOOSMALL)
+ break;
+ if (item_count() != 0) {
+ if (!item_activate_selected())
+ continue;
+ if (!item_tag())
+ continue;
+ }
+ submenu = item_data();
+ active_menu = item_data();
+ if (submenu)
+ sym = submenu->sym;
+ else
+ sym = NULL;
+
+ switch (res) {
+ case 0:
+ switch (item_tag()) {
+ case 'm':
+ if (single_menu_mode)
+ submenu->data = (void *) (long) !submenu->data;
+ else
+ conf(submenu, NULL);
+ break;
+ case 't':
+ if (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)
+ conf_choice(submenu);
+ else if (submenu->prompt->type == P_MENU)
+ conf(submenu, NULL);
+ break;
+ case 's':
+ conf_string(submenu);
+ break;
+ }
+ break;
+ case 2:
+ if (sym)
+ show_help(submenu);
+ else {
+ reset_subtitle();
+ show_helptext("README", mconf_readme);
+ }
+ break;
+ case 3:
+ reset_subtitle();
+ conf_save();
+ break;
+ case 4:
+ reset_subtitle();
+ conf_load();
+ break;
+ case 5:
+ if (item_is_tag('t')) {
+ if (sym_set_tristate_value(sym, yes))
+ break;
+ if (sym_set_tristate_value(sym, mod))
+ show_textbox(NULL, setmod_text, 6, 74);
+ }
+ break;
+ case 6:
+ if (item_is_tag('t'))
+ sym_set_tristate_value(sym, no);
+ break;
+ case 7:
+ if (item_is_tag('t'))
+ sym_set_tristate_value(sym, mod);
+ break;
+ case 8:
+ if (item_is_tag('t'))
+ sym_toggle_tristate_value(sym);
+ else if (item_is_tag('m'))
+ conf(submenu, NULL);
+ break;
+ case 9:
+ search_conf();
+ break;
+ case 10:
+ show_all_options = !show_all_options;
+ break;
+ }
+ }
+
+ list_del(trail.prev);
+}
+
+static int show_textbox_ext(const char *title, char *text, int r, int c, int
+ *keys, int *vscroll, int *hscroll, update_text_fn
+ update_text, void *data)
+{
+ dialog_clear();
+ return dialog_textbox(title, text, r, c, keys, vscroll, hscroll,
+ update_text, data);
+}
+
+static void show_textbox(const char *title, const char *text, int r, int c)
+{
+ show_textbox_ext(title, (char *) text, r, c, (int []) {0}, NULL, NULL,
+ NULL, NULL);
+}
+
+static void show_helptext(const char *title, const char *text)
+{
+ show_textbox(title, text, 0, 0);
+}
+
+static void conf_message_callback(const char *s)
+{
+ if (save_and_exit) {
+ if (!silent)
+ printf("%s", s);
+ } else {
+ show_textbox(NULL, s, 6, 60);
+ }
+}
+
+static void show_help(struct menu *menu)
+{
+ struct gstr help = str_new();
+
+ help.max_width = getmaxx(stdscr) - 10;
+ menu_get_ext_help(menu, &help);
+
+ show_helptext(menu_get_prompt(menu), str_get(&help));
+ str_free(&help);
+}
+
+static void conf_choice(struct menu *menu)
+{
+ const char *prompt = menu_get_prompt(menu);
+ struct menu *child;
+ struct symbol *active;
+
+ active = sym_get_choice_value(menu->sym);
+ while (1) {
+ int res;
+ int selected;
+ item_reset();
+
+ current_menu = menu;
+ for (child = menu->list; child; child = child->next) {
+ if (!menu_is_visible(child))
+ continue;
+ if (child->sym)
+ item_make("%s", menu_get_prompt(child));
+ else {
+ item_make("*** %s ***", menu_get_prompt(child));
+ item_set_tag(':');
+ }
+ item_set_data(child);
+ if (child->sym == active)
+ item_set_selected(1);
+ if (child->sym == sym_get_choice_value(menu->sym))
+ item_set_tag('X');
+ }
+ dialog_clear();
+ res = dialog_checklist(prompt ? prompt : "Main Menu",
+ radiolist_instructions,
+ MENUBOX_HEIGTH_MIN,
+ MENUBOX_WIDTH_MIN,
+ CHECKLIST_HEIGTH_MIN);
+ selected = item_activate_selected();
+ switch (res) {
+ case 0:
+ if (selected) {
+ child = item_data();
+ if (!child->sym)
+ break;
+
+ sym_set_tristate_value(child->sym, yes);
+ }
+ return;
+ case 1:
+ if (selected) {
+ child = item_data();
+ show_help(child);
+ active = child->sym;
+ } else
+ show_help(menu);
+ break;
+ case KEY_ESC:
+ return;
+ case -ERRDISPLAYTOOSMALL:
+ return;
+ }
+ }
+}
+
+static void conf_string(struct menu *menu)
+{
+ const char *prompt = menu_get_prompt(menu);
+
+ while (1) {
+ int res;
+ const char *heading;
+
+ switch (sym_get_type(menu->sym)) {
+ case S_INT:
+ heading = inputbox_instructions_int;
+ break;
+ case S_HEX:
+ heading = inputbox_instructions_hex;
+ break;
+ case S_STRING:
+ heading = inputbox_instructions_string;
+ break;
+ default:
+ heading = "Internal mconf error!";
+ }
+ dialog_clear();
+ res = dialog_inputbox(prompt ? prompt : "Main Menu",
+ heading, 10, 75,
+ sym_get_string_value(menu->sym));
+ switch (res) {
+ case 0:
+ if (sym_set_string_value(menu->sym, dialog_input_result))
+ return;
+ show_textbox(NULL, "You have made an invalid entry.", 5, 43);
+ break;
+ case 1:
+ show_help(menu);
+ break;
+ case KEY_ESC:
+ return;
+ }
+ }
+}
+
+static void conf_load(void)
+{
+
+ while (1) {
+ int res;
+ dialog_clear();
+ res = dialog_inputbox(NULL, load_config_text,
+ 11, 55, filename);
+ switch(res) {
+ case 0:
+ if (!dialog_input_result[0])
+ return;
+ if (!conf_read(dialog_input_result)) {
+ set_config_filename(dialog_input_result);
+ conf_set_changed(true);
+ return;
+ }
+ show_textbox(NULL, "File does not exist!", 5, 38);
+ break;
+ case 1:
+ show_helptext("Load Alternate Configuration", load_config_help);
+ break;
+ case KEY_ESC:
+ return;
+ }
+ }
+}
+
+static void conf_save(void)
+{
+ while (1) {
+ int res;
+ dialog_clear();
+ res = dialog_inputbox(NULL, save_config_text,
+ 11, 55, filename);
+ switch(res) {
+ case 0:
+ if (!dialog_input_result[0])
+ return;
+ if (!conf_write(dialog_input_result)) {
+ set_config_filename(dialog_input_result);
+ return;
+ }
+ show_textbox(NULL, "Can't create file!", 5, 60);
+ break;
+ case 1:
+ show_helptext("Save Alternate Configuration", save_config_help);
+ break;
+ case KEY_ESC:
+ return;
+ }
+ }
+}
+
+static int handle_exit(void)
+{
+ int res;
+
+ save_and_exit = 1;
+ reset_subtitle();
+ dialog_clear();
+ if (conf_get_changed())
+ res = dialog_yesno(NULL,
+ "Do you wish to save your new configuration?\n"
+ "(Press <ESC><ESC> to continue kernel configuration.)",
+ 6, 60);
+ else
+ res = -1;
+
+ end_dialog(saved_x, saved_y);
+
+ switch (res) {
+ case 0:
+ if (conf_write(filename)) {
+ fprintf(stderr, "\n\n"
+ "Error while writing of the configuration.\n"
+ "Your configuration changes were NOT saved."
+ "\n\n");
+ return 1;
+ }
+ conf_write_autoconf(0);
+ /* fall through */
+ case -1:
+ if (!silent)
+ printf("\n\n"
+ "*** End of the configuration.\n"
+ "*** Execute 'make' to start the build or try 'make help'."
+ "\n\n");
+ res = 0;
+ break;
+ default:
+ if (!silent)
+ fprintf(stderr, "\n\n"
+ "Your configuration changes were NOT saved."
+ "\n\n");
+ if (res != KEY_ESC)
+ res = 0;
+ }
+
+ return res;
+}
+
+static void sig_handler(int signo)
+{
+ exit(handle_exit());
+}
+
+int main(int ac, char **av)
+{
+ char *mode;
+ int res;
+
+ signal(SIGINT, sig_handler);
+
+ if (ac > 1 && strcmp(av[1], "-s") == 0) {
+ silent = 1;
+ /* Silence conf_read() until the real callback is set up */
+ conf_set_message_callback(NULL);
+ av++;
+ }
+ conf_parse(av[1]);
+ conf_read(NULL);
+
+ mode = getenv("MENUCONFIG_MODE");
+ if (mode) {
+ if (!strcasecmp(mode, "single_menu"))
+ single_menu_mode = 1;
+ }
+
+ if (init_dialog(NULL)) {
+ fprintf(stderr, "Your display is too small to run Menuconfig!\n");
+ fprintf(stderr, "It must be at least 19 lines by 80 columns.\n");
+ return 1;
+ }
+
+ set_config_filename(conf_get_configname());
+ conf_set_message_callback(conf_message_callback);
+ do {
+ conf(&rootmenu, NULL);
+ res = handle_exit();
+ } while (res == KEY_ESC);
+
+ return res;
+}
--git a/backport/kconf/menu.c b/backport/kconf/menu.c
new file mode 100644
index 000000000000..3d6f7cba8846
--- /dev/null
+++ b/backport/kconf/menu.c
@@ -0,0 +1,881 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ */
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lkc.h"
+#include "internal.h"
+
+static const char nohelp_text[] = "There is no help available for this option.";
+
+struct menu rootmenu;
+static struct menu **last_entry_ptr;
+
+struct file *file_list;
+struct file *current_file;
+
+void menu_warn(struct menu *menu, const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ fprintf(stderr, "%s:%d:warning: ", menu->file->name, menu->lineno);
+ vfprintf(stderr, fmt, ap);
+ fprintf(stderr, "\n");
+ va_end(ap);
+}
+
+static void prop_warn(struct property *prop, const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ fprintf(stderr, "%s:%d:warning: ", prop->file->name, prop->lineno);
+ vfprintf(stderr, fmt, ap);
+ fprintf(stderr, "\n");
+ va_end(ap);
+}
+
+void _menu_init(void)
+{
+ current_entry = current_menu = &rootmenu;
+ last_entry_ptr = &rootmenu.list;
+}
+
+void menu_add_entry(struct symbol *sym)
+{
+ struct menu *menu;
+
+ menu = xmalloc(sizeof(*menu));
+ memset(menu, 0, sizeof(*menu));
+ menu->sym = sym;
+ menu->parent = current_menu;
+ menu->file = current_file;
+ menu->lineno = zconf_lineno();
+
+ *last_entry_ptr = menu;
+ last_entry_ptr = &menu->next;
+ current_entry = menu;
+ if (sym)
+ menu_add_symbol(P_SYMBOL, sym, NULL);
+}
+
+struct menu *menu_add_menu(void)
+{
+ last_entry_ptr = ¤t_entry->list;
+ current_menu = current_entry;
+ return current_menu;
+}
+
+void menu_end_menu(void)
+{
+ last_entry_ptr = ¤t_menu->next;
+ current_menu = current_menu->parent;
+}
+
+/*
+ * Rewrites 'm' to 'm' && MODULES, so that it evaluates to 'n' when running
+ * without modules
+ */
+static struct expr *rewrite_m(struct expr *e)
+{
+ if (!e)
+ return e;
+
+ switch (e->type) {
+ case E_NOT:
+ e->left.expr = rewrite_m(e->left.expr);
+ break;
+ case E_OR:
+ case E_AND:
+ e->left.expr = rewrite_m(e->left.expr);
+ e->right.expr = rewrite_m(e->right.expr);
+ break;
+ case E_SYMBOL:
+ /* change 'm' into 'm' && MODULES */
+ if (e->left.sym == &symbol_mod)
+ return expr_alloc_and(e, expr_alloc_symbol(modules_sym));
+ break;
+ default:
+ break;
+ }
+ return e;
+}
+
+void menu_add_dep(struct expr *dep)
+{
+ current_entry->dep = expr_alloc_and(current_entry->dep, dep);
+}
+
+void menu_set_type(int type)
+{
+ struct symbol *sym = current_entry->sym;
+
+ if (sym->type == type)
+ return;
+ if (sym->type == S_UNKNOWN) {
+ sym->type = type;
+ return;
+ }
+ menu_warn(current_entry,
+ "ignoring type redefinition of '%s' from '%s' to '%s'",
+ sym->name ? sym->name : "<choice>",
+ sym_type_name(sym->type), sym_type_name(type));
+}
+
+static struct property *menu_add_prop(enum prop_type type, struct expr *expr,
+ struct expr *dep)
+{
+ struct property *prop;
+
+ prop = xmalloc(sizeof(*prop));
+ memset(prop, 0, sizeof(*prop));
+ prop->type = type;
+ prop->file = current_file;
+ prop->lineno = zconf_lineno();
+ prop->menu = current_entry;
+ prop->expr = expr;
+ prop->visible.expr = dep;
+
+ /* append property to the prop list of symbol */
+ if (current_entry->sym) {
+ struct property **propp;
+
+ for (propp = ¤t_entry->sym->prop;
+ *propp;
+ propp = &(*propp)->next)
+ ;
+ *propp = prop;
+ }
+
+ return prop;
+}
+
+struct property *menu_add_prompt(enum prop_type type, char *prompt,
+ struct expr *dep)
+{
+ struct property *prop = menu_add_prop(type, NULL, dep);
+
+ if (isspace(*prompt)) {
+ prop_warn(prop, "leading whitespace ignored");
+ while (isspace(*prompt))
+ prompt++;
+ }
+ if (current_entry->prompt)
+ prop_warn(prop, "prompt redefined");
+
+ /* Apply all upper menus' visibilities to actual prompts. */
+ if (type == P_PROMPT) {
+ struct menu *menu = current_entry;
+
+ while ((menu = menu->parent) != NULL) {
+ struct expr *dup_expr;
+
+ if (!menu->visibility)
+ continue;
+ /*
+ * Do not add a reference to the menu's visibility
+ * expression but use a copy of it. Otherwise the
+ * expression reduction functions will modify
+ * expressions that have multiple references which
+ * can cause unwanted side effects.
+ */
+ dup_expr = expr_copy(menu->visibility);
+
+ prop->visible.expr = expr_alloc_and(prop->visible.expr,
+ dup_expr);
+ }
+ }
+
+ current_entry->prompt = prop;
+ prop->text = prompt;
+
+ return prop;
+}
+
+void menu_add_visibility(struct expr *expr)
+{
+ current_entry->visibility = expr_alloc_and(current_entry->visibility,
+ expr);
+}
+
+void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
+{
+ menu_add_prop(type, expr, dep);
+}
+
+void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
+{
+ menu_add_prop(type, expr_alloc_symbol(sym), dep);
+}
+
+static int menu_validate_number(struct symbol *sym, struct symbol *sym2)
+{
+ return sym2->type == S_INT || sym2->type == S_HEX ||
+ (sym2->type == S_UNKNOWN && sym_string_valid(sym, sym2->name));
+}
+
+static void sym_check_prop(struct symbol *sym)
+{
+ struct property *prop;
+ struct symbol *sym2;
+ char *use;
+
+ for (prop = sym->prop; prop; prop = prop->next) {
+ switch (prop->type) {
+ case P_DEFAULT:
+ if ((sym->type == S_STRING || sym->type == S_INT || sym->type == S_HEX) &&
+ prop->expr->type != E_SYMBOL)
+ prop_warn(prop,
+ "default for config symbol '%s'"
+ " must be a single symbol", sym->name);
+ if (prop->expr->type != E_SYMBOL)
+ break;
+ sym2 = prop_get_symbol(prop);
+ if (sym->type == S_HEX || sym->type == S_INT) {
+ if (!menu_validate_number(sym, sym2))
+ prop_warn(prop,
+ "'%s': number is invalid",
+ sym->name);
+ }
+ if (sym_is_choice(sym)) {
+ struct property *choice_prop =
+ sym_get_choice_prop(sym2);
+
+ if (!choice_prop ||
+ prop_get_symbol(choice_prop) != sym)
+ prop_warn(prop,
+ "choice default symbol '%s' is not contained in the choice",
+ sym2->name);
+ }
+ break;
+ case P_SELECT:
+ case P_IMPLY:
+ use = prop->type == P_SELECT ? "select" : "imply";
+ sym2 = prop_get_symbol(prop);
+ if (sym->type != S_BOOLEAN && sym->type != S_TRISTATE)
+ prop_warn(prop,
+ "config symbol '%s' uses %s, but is "
+ "not bool or tristate", sym->name, use);
+ else if (sym2->type != S_UNKNOWN &&
+ sym2->type != S_BOOLEAN &&
+ sym2->type != S_TRISTATE)
+ prop_warn(prop,
+ "'%s' has wrong type. '%s' only "
+ "accept arguments of bool and "
+ "tristate type", sym2->name, use);
+ break;
+ case P_RANGE:
+ if (sym->type != S_INT && sym->type != S_HEX)
+ prop_warn(prop, "range is only allowed "
+ "for int or hex symbols");
+ if (!menu_validate_number(sym, prop->expr->left.sym) ||
+ !menu_validate_number(sym, prop->expr->right.sym))
+ prop_warn(prop, "range is invalid");
+ break;
+ default:
+ ;
+ }
+ }
+}
+
+void menu_finalize(struct menu *parent)
+{
+ struct menu *menu, *last_menu;
+ struct symbol *sym;
+ struct property *prop;
+ struct expr *parentdep, *basedep, *dep, *dep2, **ep;
+
+ sym = parent->sym;
+ if (parent->list) {
+ /*
+ * This menu node has children. We (recursively) process them
+ * and propagate parent dependencies before moving on.
+ */
+
+ if (sym && sym_is_choice(sym)) {
+ if (sym->type == S_UNKNOWN) {
+ /* find the first choice value to find out choice type */
+ current_entry = parent;
+ for (menu = parent->list; menu; menu = menu->next) {
+ if (menu->sym && menu->sym->type != S_UNKNOWN) {
+ menu_set_type(menu->sym->type);
+ break;
+ }
+ }
+ }
+ /* set the type of the remaining choice values */
+ for (menu = parent->list; menu; menu = menu->next) {
+ current_entry = menu;
+ if (menu->sym && menu->sym->type == S_UNKNOWN)
+ menu_set_type(sym->type);
+ }
+
+ /*
+ * Use the choice itself as the parent dependency of
+ * the contained items. This turns the mode of the
+ * choice into an upper bound on the visibility of the
+ * choice value symbols.
+ */
+ parentdep = expr_alloc_symbol(sym);
+ } else {
+ /* Menu node for 'menu', 'if' */
+ parentdep = parent->dep;
+ }
+
+ /* For each child menu node... */
+ for (menu = parent->list; menu; menu = menu->next) {
+ /*
+ * Propagate parent dependencies to the child menu
+ * node, also rewriting and simplifying expressions
+ */
+ basedep = rewrite_m(menu->dep);
+ basedep = expr_transform(basedep);
+ basedep = expr_alloc_and(expr_copy(parentdep), basedep);
+ basedep = expr_eliminate_dups(basedep);
+ menu->dep = basedep;
+
+ if (menu->sym)
+ /*
+ * Note: For symbols, all prompts are included
+ * too in the symbol's own property list
+ */
+ prop = menu->sym->prop;
+ else
+ /*
+ * For non-symbol menu nodes, we just need to
+ * handle the prompt
+ */
+ prop = menu->prompt;
+
+ /* For each property... */
+ for (; prop; prop = prop->next) {
+ if (prop->menu != menu)
+ /*
+ * Two possibilities:
+ *
+ * 1. The property lacks dependencies
+ * and so isn't location-specific,
+ * e.g. an 'option'
+ *
+ * 2. The property belongs to a symbol
+ * defined in multiple locations and
+ * is from some other location. It
+ * will be handled there in that
+ * case.
+ *
+ * Skip the property.
+ */
+ continue;
+
+ /*
+ * Propagate parent dependencies to the
+ * property's condition, rewriting and
+ * simplifying expressions at the same time
+ */
+ dep = rewrite_m(prop->visible.expr);
+ dep = expr_transform(dep);
+ dep = expr_alloc_and(expr_copy(basedep), dep);
+ dep = expr_eliminate_dups(dep);
+ if (menu->sym && menu->sym->type != S_TRISTATE)
+ dep = expr_trans_bool(dep);
+ prop->visible.expr = dep;
+
+ /*
+ * Handle selects and implies, which modify the
+ * dependencies of the selected/implied symbol
+ */
+ if (prop->type == P_SELECT) {
+ struct symbol *es = prop_get_symbol(prop);
+ es->rev_dep.expr = expr_alloc_or(es->rev_dep.expr,
+ expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
+ } else if (prop->type == P_IMPLY) {
+ struct symbol *es = prop_get_symbol(prop);
+ es->implied.expr = expr_alloc_or(es->implied.expr,
+ expr_alloc_and(expr_alloc_symbol(menu->sym), expr_copy(dep)));
+ }
+ }
+ }
+
+ if (sym && sym_is_choice(sym))
+ expr_free(parentdep);
+
+ /*
+ * Recursively process children in the same fashion before
+ * moving on
+ */
+ for (menu = parent->list; menu; menu = menu->next)
+ menu_finalize(menu);
+ } else if (sym) {
+ /*
+ * Automatic submenu creation. If sym is a symbol and A, B, C,
+ * ... are consecutive items (symbols, menus, ifs, etc.) that
+ * all depend on sym, then the following menu structure is
+ * created:
+ *
+ * sym
+ * +-A
+ * +-B
+ * +-C
+ * ...
+ *
+ * This also works recursively, giving the following structure
+ * if A is a symbol and B depends on A:
+ *
+ * sym
+ * +-A
+ * | +-B
+ * +-C
+ * ...
+ */
+
+ basedep = parent->prompt ? parent->prompt->visible.expr : NULL;
+ basedep = expr_trans_compare(basedep, E_UNEQUAL, &symbol_no);
+ basedep = expr_eliminate_dups(expr_transform(basedep));
+
+ /* Examine consecutive elements after sym */
+ last_menu = NULL;
+ for (menu = parent->next; menu; menu = menu->next) {
+ dep = menu->prompt ? menu->prompt->visible.expr : menu->dep;
+ if (!expr_contains_symbol(dep, sym))
+ /* No dependency, quit */
+ break;
+ if (expr_depends_symbol(dep, sym))
+ /* Absolute dependency, put in submenu */
+ goto next;
+
+ /*
+ * Also consider it a dependency on sym if our
+ * dependencies contain sym and are a "superset" of
+ * sym's dependencies, e.g. '(sym || Q) && R' when sym
+ * depends on R.
+ *
+ * Note that 'R' might be from an enclosing menu or if,
+ * making this a more common case than it might seem.
+ */
+ dep = expr_trans_compare(dep, E_UNEQUAL, &symbol_no);
+ dep = expr_eliminate_dups(expr_transform(dep));
+ dep2 = expr_copy(basedep);
+ expr_eliminate_eq(&dep, &dep2);
+ expr_free(dep);
+ if (!expr_is_yes(dep2)) {
+ /* Not superset, quit */
+ expr_free(dep2);
+ break;
+ }
+ /* Superset, put in submenu */
+ expr_free(dep2);
+ next:
+ menu_finalize(menu);
+ menu->parent = parent;
+ last_menu = menu;
+ }
+ expr_free(basedep);
+ if (last_menu) {
+ parent->list = parent->next;
+ parent->next = last_menu->next;
+ last_menu->next = NULL;
+ }
+
+ sym->dir_dep.expr = expr_alloc_or(sym->dir_dep.expr, parent->dep);
+ }
+ for (menu = parent->list; menu; menu = menu->next) {
+ if (sym && sym_is_choice(sym) &&
+ menu->sym && !sym_is_choice_value(menu->sym)) {
+ current_entry = menu;
+ menu->sym->flags |= SYMBOL_CHOICEVAL;
+ if (!menu->prompt)
+ menu_warn(menu, "choice value must have a prompt");
+ for (prop = menu->sym->prop; prop; prop = prop->next) {
+ if (prop->type == P_DEFAULT)
+ prop_warn(prop, "defaults for choice "
+ "values not supported");
+ if (prop->menu == menu)
+ continue;
+ if (prop->type == P_PROMPT &&
+ prop->menu->parent->sym != sym)
+ prop_warn(prop, "choice value used outside its choice group");
+ }
+ /* Non-tristate choice values of tristate choices must
+ * depend on the choice being set to Y. The choice
+ * values' dependencies were propagated to their
+ * properties above, so the change here must be re-
+ * propagated.
+ */
+ if (sym->type == S_TRISTATE && menu->sym->type != S_TRISTATE) {
+ basedep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
+ menu->dep = expr_alloc_and(basedep, menu->dep);
+ for (prop = menu->sym->prop; prop; prop = prop->next) {
+ if (prop->menu != menu)
+ continue;
+ prop->visible.expr = expr_alloc_and(expr_copy(basedep),
+ prop->visible.expr);
+ }
+ }
+ menu_add_symbol(P_CHOICE, sym, NULL);
+ prop = sym_get_choice_prop(sym);
+ for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)
+ ;
+ *ep = expr_alloc_one(E_LIST, NULL);
+ (*ep)->right.sym = menu->sym;
+ }
+
+ /*
+ * This code serves two purposes:
+ *
+ * (1) Flattening 'if' blocks, which do not specify a submenu
+ * and only add dependencies.
+ *
+ * (Automatic submenu creation might still create a submenu
+ * from an 'if' before this code runs.)
+ *
+ * (2) "Undoing" any automatic submenus created earlier below
+ * promptless symbols.
+ *
+ * Before:
+ *
+ * A
+ * if ... (or promptless symbol)
+ * +-B
+ * +-C
+ * D
+ *
+ * After:
+ *
+ * A
+ * if ... (or promptless symbol)
+ * B
+ * C
+ * D
+ */
+ if (menu->list && (!menu->prompt || !menu->prompt->text)) {
+ for (last_menu = menu->list; ; last_menu = last_menu->next) {
+ last_menu->parent = parent;
+ if (!last_menu->next)
+ break;
+ }
+ last_menu->next = menu->next;
+ menu->next = menu->list;
+ menu->list = NULL;
+ }
+ }
+
+ if (sym && !(sym->flags & SYMBOL_WARNED)) {
+ if (sym->type == S_UNKNOWN)
+ menu_warn(parent, "config symbol defined without type");
+
+ if (sym_is_choice(sym) && !parent->prompt)
+ menu_warn(parent, "choice must have a prompt");
+
+ /* Check properties connected to this symbol */
+ sym_check_prop(sym);
+ sym->flags |= SYMBOL_WARNED;
+ }
+
+ /*
+ * For non-optional choices, add a reverse dependency (corresponding to
+ * a select) of '<visibility> && m'. This prevents the user from
+ * setting the choice mode to 'n' when the choice is visible.
+ *
+ * This would also work for non-choice symbols, but only non-optional
+ * choices clear SYMBOL_OPTIONAL as of writing. Choices are implemented
+ * as a type of symbol.
+ */
+ if (sym && !sym_is_optional(sym) && parent->prompt) {
+ sym->rev_dep.expr = expr_alloc_or(sym->rev_dep.expr,
+ expr_alloc_and(parent->prompt->visible.expr,
+ expr_alloc_symbol(&symbol_mod)));
+ }
+}
+
+bool menu_has_prompt(struct menu *menu)
+{
+ if (!menu->prompt)
+ return false;
+ return true;
+}
+
+/*
+ * Determine if a menu is empty.
+ * A menu is considered empty if it contains no or only
+ * invisible entries.
+ */
+bool menu_is_empty(struct menu *menu)
+{
+ struct menu *child;
+
+ for (child = menu->list; child; child = child->next) {
+ if (menu_is_visible(child))
+ return(false);
+ }
+ return(true);
+}
+
+bool menu_is_visible(struct menu *menu)
+{
+ struct menu *child;
+ struct symbol *sym;
+ tristate visible;
+
+ if (!menu->prompt)
+ return false;
+
+ if (menu->visibility) {
+ if (expr_calc_value(menu->visibility) == no)
+ return false;
+ }
+
+ sym = menu->sym;
+ if (sym) {
+ sym_calc_value(sym);
+ visible = menu->prompt->visible.tri;
+ } else
+ visible = menu->prompt->visible.tri = expr_calc_value(menu->prompt->visible.expr);
+
+ if (visible != no)
+ return true;
+
+ if (!sym || sym_get_tristate_value(menu->sym) == no)
+ return false;
+
+ for (child = menu->list; child; child = child->next) {
+ if (menu_is_visible(child)) {
+ if (sym)
+ sym->flags |= SYMBOL_DEF_USER;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+const char *menu_get_prompt(struct menu *menu)
+{
+ if (menu->prompt)
+ return menu->prompt->text;
+ else if (menu->sym)
+ return menu->sym->name;
+ return NULL;
+}
+
+struct menu *menu_get_root_menu(struct menu *menu)
+{
+ return &rootmenu;
+}
+
+struct menu *menu_get_parent_menu(struct menu *menu)
+{
+ enum prop_type type;
+
+ for (; menu != &rootmenu; menu = menu->parent) {
+ type = menu->prompt ? menu->prompt->type : 0;
+ if (type == P_MENU)
+ break;
+ }
+ return menu;
+}
+
+bool menu_has_help(struct menu *menu)
+{
+ return menu->help != NULL;
+}
+
+const char *menu_get_help(struct menu *menu)
+{
+ if (menu->help)
+ return menu->help;
+ else
+ return "";
+}
+
+static void get_def_str(struct gstr *r, struct menu *menu)
+{
+ str_printf(r, "Defined at %s:%d\n",
+ menu->file->name, menu->lineno);
+}
+
+static void get_dep_str(struct gstr *r, struct expr *expr, const char *prefix)
+{
+ if (!expr_is_yes(expr)) {
+ str_append(r, prefix);
+ expr_gstr_print(expr, r);
+ str_append(r, "\n");
+ }
+}
+
+static void get_prompt_str(struct gstr *r, struct property *prop,
+ struct list_head *head)
+{
+ int i, j;
+ struct menu *submenu[8], *menu, *location = NULL;
+ struct jump_key *jump = NULL;
+
+ str_printf(r, " Prompt: %s\n", prop->text);
+
+ get_dep_str(r, prop->menu->dep, " Depends on: ");
+ /*
+ * Most prompts in Linux have visibility that exactly matches their
+ * dependencies. For these, we print only the dependencies to improve
+ * readability. However, prompts with inline "if" expressions and
+ * prompts with a parent that has a "visible if" expression have
+ * differing dependencies and visibility. In these rare cases, we
+ * print both.
+ */
+ if (!expr_eq(prop->menu->dep, prop->visible.expr))
+ get_dep_str(r, prop->visible.expr, " Visible if: ");
+
+ menu = prop->menu->parent;
+ for (i = 0; menu && i < 8; menu = menu->parent) {
+ bool accessible = menu_is_visible(menu);
+
+ submenu[i++] = menu;
+ if (location == NULL && accessible)
+ location = menu;
+ }
+ if (head && location) {
+ jump = xmalloc(sizeof(struct jump_key));
+
+ if (menu_is_visible(prop->menu)) {
+ /*
+ * There is not enough room to put the hint at the
+ * beginning of the "Prompt" line. Put the hint on the
+ * last "Location" line even when it would belong on
+ * the former.
+ */
+ jump->target = prop->menu;
+ } else
+ jump->target = location;
+
+ if (list_empty(head))
+ jump->index = 0;
+ else
+ jump->index = list_entry(head->prev, struct jump_key,
+ entries)->index + 1;
+
+ list_add_tail(&jump->entries, head);
+ }
+
+ str_printf(r, " Location:\n");
+ for (j = 4; --i >= 0; j += 2) {
+ menu = submenu[i];
+ if (jump && menu == location)
+ jump->offset = strlen(r->s);
+
+ if (menu == &rootmenu)
+ /* The real rootmenu prompt is ugly */
+ str_printf(r, "%*cMain menu", j, ' ');
+ else
+ str_printf(r, "%*c-> %s", j, ' ', menu_get_prompt(menu));
+
+ if (menu->sym) {
+ str_printf(r, " (%s [=%s])", menu->sym->name ?
+ menu->sym->name : "<choice>",
+ sym_get_string_value(menu->sym));
+ }
+ str_append(r, "\n");
+ }
+}
+
+static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
+ enum prop_type tok, const char *prefix)
+{
+ bool hit = false;
+ struct property *prop;
+
+ for_all_properties(sym, prop, tok) {
+ if (!hit) {
+ str_append(r, prefix);
+ hit = true;
+ } else
+ str_printf(r, " && ");
+ expr_gstr_print(prop->expr, r);
+ }
+ if (hit)
+ str_append(r, "\n");
+}
+
+/*
+ * head is optional and may be NULL
+ */
+static void get_symbol_str(struct gstr *r, struct symbol *sym,
+ struct list_head *head)
+{
+ struct property *prop;
+
+ if (sym && sym->name) {
+ str_printf(r, "Symbol: %s [=%s]\n", sym->name,
+ sym_get_string_value(sym));
+ str_printf(r, "Type : %s\n", sym_type_name(sym->type));
+ if (sym->type == S_INT || sym->type == S_HEX) {
+ prop = sym_get_range_prop(sym);
+ if (prop) {
+ str_printf(r, "Range : ");
+ expr_gstr_print(prop->expr, r);
+ str_append(r, "\n");
+ }
+ }
+ }
+
+ /* Print the definitions with prompts before the ones without */
+ for_all_properties(sym, prop, P_SYMBOL) {
+ if (prop->menu->prompt) {
+ get_def_str(r, prop->menu);
+ get_prompt_str(r, prop->menu->prompt, head);
+ }
+ }
+
+ for_all_properties(sym, prop, P_SYMBOL) {
+ if (!prop->menu->prompt) {
+ get_def_str(r, prop->menu);
+ get_dep_str(r, prop->menu->dep, " Depends on: ");
+ }
+ }
+
+ get_symbol_props_str(r, sym, P_SELECT, "Selects: ");
+ if (sym->rev_dep.expr) {
+ expr_gstr_print_revdep(sym->rev_dep.expr, r, yes, "Selected by [y]:\n");
+ expr_gstr_print_revdep(sym->rev_dep.expr, r, mod, "Selected by [m]:\n");
+ expr_gstr_print_revdep(sym->rev_dep.expr, r, no, "Selected by [n]:\n");
+ }
+
+ get_symbol_props_str(r, sym, P_IMPLY, "Implies: ");
+ if (sym->implied.expr) {
+ expr_gstr_print_revdep(sym->implied.expr, r, yes, "Implied by [y]:\n");
+ expr_gstr_print_revdep(sym->implied.expr, r, mod, "Implied by [m]:\n");
+ expr_gstr_print_revdep(sym->implied.expr, r, no, "Implied by [n]:\n");
+ }
+
+ str_append(r, "\n\n");
+}
+
+struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head)
+{
+ struct symbol *sym;
+ struct gstr res = str_new();
+ int i;
+
+ for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
+ get_symbol_str(&res, sym, head);
+ if (!i)
+ str_append(&res, "No matches found.\n");
+ return res;
+}
+
+
+void menu_get_ext_help(struct menu *menu, struct gstr *help)
+{
+ struct symbol *sym = menu->sym;
+ const char *help_text = nohelp_text;
+
+ if (menu_has_help(menu)) {
+ if (sym->name)
+ str_printf(help, "%s%s:\n\n", CONFIG_, sym->name);
+ help_text = menu_get_help(menu);
+ }
+ str_printf(help, "%s\n", help_text);
+ if (sym)
+ get_symbol_str(help, sym, NULL);
+}
diff --git a/backport/kconf/nconf-cfg.sh b/backport/kconf/nconf-cfg.sh
new file mode 100755
index 000000000000..c212255070c0
--- /dev/null
+++ b/backport/kconf/nconf-cfg.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+PKG="ncursesw menuw panelw"
+PKG2="ncurses menu panel"
+
+if [ -n "$(command -v pkg-config)" ]; then
+ if pkg-config --exists $PKG; then
+ echo cflags=\"$(pkg-config --cflags $PKG)\"
+ echo libs=\"$(pkg-config --libs $PKG)\"
+ exit 0
+ fi
+
+ if pkg-config --exists $PKG2; then
+ echo cflags=\"$(pkg-config --cflags $PKG2)\"
+ echo libs=\"$(pkg-config --libs $PKG2)\"
+ exit 0
+ fi
+fi
+
+# Check the default paths in case pkg-config is not installed.
+# (Even if it is installed, some distributions such as openSUSE cannot
+# find ncurses by pkg-config.)
+if [ -f /usr/include/ncursesw/ncurses.h ]; then
+ echo cflags=\"-D_GNU_SOURCE -I/usr/include/ncursesw\"
+ echo libs=\"-lncursesw -lmenuw -lpanelw\"
+ exit 0
+fi
+
+if [ -f /usr/include/ncurses/ncurses.h ]; then
+ echo cflags=\"-D_GNU_SOURCE -I/usr/include/ncurses\"
+ echo libs=\"-lncurses -lmenu -lpanel\"
+ exit 0
+fi
+
+if [ -f /usr/include/ncurses.h ]; then
+ echo cflags=\"-D_GNU_SOURCE\"
+ echo libs=\"-lncurses -lmenu -lpanel\"
+ exit 0
+fi
+
+echo >&2 "*"
+echo >&2 "* Unable to find the ncurses package."
+echo >&2 "* Install ncurses (ncurses-devel or libncurses-dev"
+echo >&2 "* depending on your distribution)."
+echo >&2 "*"
+echo >&2 "* You may also need to install pkg-config to find the"
+echo >&2 "* ncurses installed in a non-default location."
+echo >&2 "*"
+exit 1
diff --git a/backport/kconf/nconf.c b/backport/kconf/nconf.c
new file mode 100644
index 000000000000..7b371bd7fb36
--- /dev/null
+++ b/backport/kconf/nconf.c
@@ -0,0 +1,1549 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2008 Nir Tzachar <nir.tzachar@gmail.com>
+ *
+ * Derived from menuconfig.
+ */
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+
+#include "lkc.h"
+#include "nconf.h"
+#include <ctype.h>
+
+static const char nconf_global_help[] =
+"Help windows\n"
+"------------\n"
+"o Global help: Unless in a data entry window, pressing <F1> will give \n"
+" you the global help window, which you are just reading.\n"
+"\n"
+"o A short version of the global help is available by pressing <F3>.\n"
+"\n"
+"o Local help: To get help related to the current menu entry, use any\n"
+" of <?> <h>, or if in a data entry window then press <F1>.\n"
+"\n"
+"\n"
+"Menu entries\n"
+"------------\n"
+"This interface lets you select features and parameters for the kernel\n"
+"build. Kernel features can either be built-in, modularized, or removed.\n"
+"Parameters must be entered as text or decimal or hexadecimal numbers.\n"
+"\n"
+"Menu entries beginning with following braces represent features that\n"
+" [ ] can be built in or removed\n"
+" < > can be built in, modularized or removed\n"
+" { } can be built in or modularized, are selected by another feature\n"
+" - - are selected by another feature\n"
+" XXX cannot be selected. Symbol Info <F2> tells you why.\n"
+"*, M or whitespace inside braces means to build in, build as a module\n"
+"or to exclude the feature respectively.\n"
+"\n"
+"To change any of these features, highlight it with the movement keys\n"
+"listed below and press <y> to build it in, <m> to make it a module or\n"
+"<n> to remove it. You may press the <Space> key to cycle through the\n"
+"available options.\n"
+"\n"
+"A trailing \"--->\" designates a submenu, a trailing \"----\" an\n"
+"empty submenu.\n"
+"\n"
+"Menu navigation keys\n"
+"----------------------------------------------------------------------\n"
+"Linewise up <Up>\n"
+"Linewise down <Down>\n"
+"Pagewise up <Page Up>\n"
+"Pagewise down <Page Down>\n"
+"First entry <Home>\n"
+"Last entry <End>\n"
+"Enter a submenu <Right> <Enter>\n"
+"Go back to parent menu <Left> <Esc> <F5>\n"
+"Close a help window <Enter> <Esc> <F5>\n"
+"Close entry window, apply <Enter>\n"
+"Close entry window, forget <Esc> <F5>\n"
+"Start incremental, case-insensitive search for STRING in menu entries,\n"
+" no regex support, STRING is displayed in upper left corner\n"
+" </>STRING\n"
+" Remove last character <Backspace>\n"
+" Jump to next hit <Down>\n"
+" Jump to previous hit <Up>\n"
+"Exit menu search mode </> <Esc>\n"
+"Search for configuration variables with or without leading CONFIG_\n"
+" <F8>RegExpr<Enter>\n"
+"Verbose search help <F8><F1>\n"
+"----------------------------------------------------------------------\n"
+"\n"
+"Unless in a data entry window, key <1> may be used instead of <F1>,\n"
+"<2> instead of <F2>, etc.\n"
+"\n"
+"\n"
+"Radiolist (Choice list)\n"
+"-----------------------\n"
+"Use the movement keys listed above to select the option you wish to set\n"
+"and press <Space>.\n"
+"\n"
+"\n"
+"Data entry\n"
+"----------\n"
+"Enter the requested information and press <Enter>. Hexadecimal values\n"
+"may be entered without the \"0x\" prefix.\n"
+"\n"
+"\n"
+"Text Box (Help Window)\n"
+"----------------------\n"
+"Use movement keys as listed in table above.\n"
+"\n"
+"Press any of <Enter> <Esc> <q> <F5> <F9> to exit.\n"
+"\n"
+"\n"
+"Alternate configuration files\n"
+"-----------------------------\n"
+"nconfig supports switching between different configurations.\n"
+"Press <F6> to save your current configuration. Press <F7> and enter\n"
+"a file name to load a previously saved configuration.\n"
+"\n"
+"\n"
+"Terminal configuration\n"
+"----------------------\n"
+"If you use nconfig in a xterm window, make sure your TERM environment\n"
+"variable specifies a terminal configuration which supports at least\n"
+"16 colors. Otherwise nconfig will look rather bad.\n"
+"\n"
+"If the \"stty size\" command reports the current terminalsize correctly,\n"
+"nconfig will adapt to sizes larger than the traditional 80x25 \"standard\"\n"
+"and display longer menus properly.\n"
+"\n"
+"\n"
+"Single menu mode\n"
+"----------------\n"
+"If you prefer to have all of the menu entries listed in a single menu,\n"
+"rather than the default multimenu hierarchy, run nconfig with\n"
+"NCONFIG_MODE environment variable set to single_menu. Example:\n"
+"\n"
+"make NCONFIG_MODE=single_menu nconfig\n"
+"\n"
+"<Enter> will then unfold the appropriate category, or fold it if it\n"
+"is already unfolded. Folded menu entries will be designated by a\n"
+"leading \"++>\" and unfolded entries by a leading \"-->\".\n"
+"\n"
+"Note that this mode can eventually be a little more CPU expensive than\n"
+"the default mode, especially with a larger number of unfolded submenus.\n"
+"\n",
+menu_no_f_instructions[] =
+"Legend: [*] built-in [ ] excluded <M> module < > module capable.\n"
+"Submenus are designated by a trailing \"--->\", empty ones by \"----\".\n"
+"\n"
+"Use the following keys to navigate the menus:\n"
+"Move up or down with <Up> and <Down>.\n"
+"Enter a submenu with <Enter> or <Right>.\n"
+"Exit a submenu to its parent menu with <Esc> or <Left>.\n"
+"Pressing <y> includes, <n> excludes, <m> modularizes features.\n"
+"Pressing <Space> cycles through the available options.\n"
+"To search for menu entries press </>.\n"
+"<Esc> always leaves the current window.\n"
+"\n"
+"You do not have function keys support.\n"
+"Press <1> instead of <F1>, <2> instead of <F2>, etc.\n"
+"For verbose global help use key <1>.\n"
+"For help related to the current menu entry press <?> or <h>.\n",
+menu_instructions[] =
+"Legend: [*] built-in [ ] excluded <M> module < > module capable.\n"
+"Submenus are designated by a trailing \"--->\", empty ones by \"----\".\n"
+"\n"
+"Use the following keys to navigate the menus:\n"
+"Move up or down with <Up> or <Down>.\n"
+"Enter a submenu with <Enter> or <Right>.\n"
+"Exit a submenu to its parent menu with <Esc> or <Left>.\n"
+"Pressing <y> includes, <n> excludes, <m> modularizes features.\n"
+"Pressing <Space> cycles through the available options.\n"
+"To search for menu entries press </>.\n"
+"<Esc> always leaves the current window.\n"
+"\n"
+"Pressing <1> may be used instead of <F1>, <2> instead of <F2>, etc.\n"
+"For verbose global help press <F1>.\n"
+"For help related to the current menu entry press <?> or <h>.\n",
+radiolist_instructions[] =
+"Press <Up>, <Down>, <Home> or <End> to navigate a radiolist, select\n"
+"with <Space>.\n"
+"For help related to the current entry press <?> or <h>.\n"
+"For global help press <F1>.\n",
+inputbox_instructions_int[] =
+"Please enter a decimal value.\n"
+"Fractions will not be accepted.\n"
+"Press <Enter> to apply, <Esc> to cancel.",
+inputbox_instructions_hex[] =
+"Please enter a hexadecimal value.\n"
+"Press <Enter> to apply, <Esc> to cancel.",
+inputbox_instructions_string[] =
+"Please enter a string value.\n"
+"Press <Enter> to apply, <Esc> to cancel.",
+setmod_text[] =
+"This feature depends on another feature which has been configured as a\n"
+"module. As a result, the current feature will be built as a module too.",
+load_config_text[] =
+"Enter the name of the configuration file you wish to load.\n"
+"Accept the name shown to restore the configuration you last\n"
+"retrieved. Leave empty to abort.",
+load_config_help[] =
+"For various reasons, one may wish to keep several different\n"
+"configurations available on a single machine.\n"
+"\n"
+"If you have saved a previous configuration in a file other than the\n"
+"default one, entering its name here will allow you to load and modify\n"
+"that configuration.\n"
+"\n"
+"Leave empty to abort.\n",
+save_config_text[] =
+"Enter a filename to which this configuration should be saved\n"
+"as an alternate. Leave empty to abort.",
+save_config_help[] =
+"For various reasons, one may wish to keep several different\n"
+"configurations available on a single machine.\n"
+"\n"
+"Entering a file name here will allow you to later retrieve, modify\n"
+"and use the current configuration as an alternate to whatever\n"
+"configuration options you have selected at that time.\n"
+"\n"
+"Leave empty to abort.\n",
+search_help[] =
+"Search for symbols (configuration variable names CONFIG_*) and display\n"
+"their relations. Regular expressions are supported.\n"
+"Example: Search for \"^FOO\".\n"
+"Result:\n"
+"-----------------------------------------------------------------\n"
+"Symbol: FOO [ = m]\n"
+"Prompt: Foo bus is used to drive the bar HW\n"
+"Defined at drivers/pci/Kconfig:47\n"
+"Depends on: X86_LOCAL_APIC && X86_IO_APIC || IA64\n"
+"Location:\n"
+" -> Bus options (PCI, PCMCIA, EISA, ISA)\n"
+" -> PCI support (PCI [ = y])\n"
+" -> PCI access mode (<choice> [ = y])\n"
+"Selects: LIBCRC32\n"
+"Selected by: BAR\n"
+"-----------------------------------------------------------------\n"
+"o The line 'Prompt:' shows the text displayed for this symbol in\n"
+" the menu hierarchy.\n"
+"o The 'Defined at' line tells at what file / line number the symbol is\n"
+" defined.\n"
+"o The 'Depends on:' line lists symbols that need to be defined for\n"
+" this symbol to be visible and selectable in the menu.\n"
+"o The 'Location:' lines tell, where in the menu structure this symbol\n"
+" is located. A location followed by a [ = y] indicates that this is\n"
+" a selectable menu item, and the current value is displayed inside\n"
+" brackets.\n"
+"o The 'Selects:' line tells, what symbol will be automatically selected\n"
+" if this symbol is selected (y or m).\n"
+"o The 'Selected by' line tells what symbol has selected this symbol.\n"
+"\n"
+"Only relevant lines are shown.\n"
+"\n\n"
+"Search examples:\n"
+"USB => find all symbols containing USB\n"
+"^USB => find all symbols starting with USB\n"
+"USB$ => find all symbols ending with USB\n"
+"\n";
+
+struct mitem {
+ char str[256];
+ char tag;
+ void *usrptr;
+ int is_visible;
+};
+
+#define MAX_MENU_ITEMS 4096
+static int show_all_items;
+static int indent;
+static struct menu *current_menu;
+static int child_count;
+static int single_menu_mode;
+/* the window in which all information appears */
+static WINDOW *main_window;
+/* the largest size of the menu window */
+static int mwin_max_lines;
+static int mwin_max_cols;
+/* the window in which we show option buttons */
+static MENU *curses_menu;
+static ITEM *curses_menu_items[MAX_MENU_ITEMS];
+static struct mitem k_menu_items[MAX_MENU_ITEMS];
+static unsigned int items_num;
+static int global_exit;
+/* the currently selected button */
+static const char *current_instructions = menu_instructions;
+
+static char *dialog_input_result;
+static int dialog_input_result_len;
+
+static void conf(struct menu *menu);
+static void conf_choice(struct menu *menu);
+static void conf_string(struct menu *menu);
+static void conf_load(void);
+static void conf_save(void);
+static void show_help(struct menu *menu);
+static int do_exit(void);
+static void setup_windows(void);
+static void search_conf(void);
+
+typedef void (*function_key_handler_t)(int *key, struct menu *menu);
+static void handle_f1(int *key, struct menu *current_item);
+static void handle_f2(int *key, struct menu *current_item);
+static void handle_f3(int *key, struct menu *current_item);
+static void handle_f4(int *key, struct menu *current_item);
+static void handle_f5(int *key, struct menu *current_item);
+static void handle_f6(int *key, struct menu *current_item);
+static void handle_f7(int *key, struct menu *current_item);
+static void handle_f8(int *key, struct menu *current_item);
+static void handle_f9(int *key, struct menu *current_item);
+
+struct function_keys {
+ const char *key_str;
+ const char *func;
+ function_key key;
+ function_key_handler_t handler;
+};
+
+static const int function_keys_num = 9;
+static struct function_keys function_keys[] = {
+ {
+ .key_str = "F1",
+ .func = "Help",
+ .key = F_HELP,
+ .handler = handle_f1,
+ },
+ {
+ .key_str = "F2",
+ .func = "SymInfo",
+ .key = F_SYMBOL,
+ .handler = handle_f2,
+ },
+ {
+ .key_str = "F3",
+ .func = "Help 2",
+ .key = F_INSTS,
+ .handler = handle_f3,
+ },
+ {
+ .key_str = "F4",
+ .func = "ShowAll",
+ .key = F_CONF,
+ .handler = handle_f4,
+ },
+ {
+ .key_str = "F5",
+ .func = "Back",
+ .key = F_BACK,
+ .handler = handle_f5,
+ },
+ {
+ .key_str = "F6",
+ .func = "Save",
+ .key = F_SAVE,
+ .handler = handle_f6,
+ },
+ {
+ .key_str = "F7",
+ .func = "Load",
+ .key = F_LOAD,
+ .handler = handle_f7,
+ },
+ {
+ .key_str = "F8",
+ .func = "SymSearch",
+ .key = F_SEARCH,
+ .handler = handle_f8,
+ },
+ {
+ .key_str = "F9",
+ .func = "Exit",
+ .key = F_EXIT,
+ .handler = handle_f9,
+ },
+};
+
+static void print_function_line(void)
+{
+ int i;
+ int offset = 1;
+ const int skip = 1;
+ int lines = getmaxy(stdscr);
+
+ for (i = 0; i < function_keys_num; i++) {
+ wattrset(main_window, attr_function_highlight);
+ mvwprintw(main_window, lines-3, offset,
+ "%s",
+ function_keys[i].key_str);
+ wattrset(main_window, attr_function_text);
+ offset += strlen(function_keys[i].key_str);
+ mvwprintw(main_window, lines-3,
+ offset, "%s",
+ function_keys[i].func);
+ offset += strlen(function_keys[i].func) + skip;
+ }
+ wattrset(main_window, attr_normal);
+}
+
+/* help */
+static void handle_f1(int *key, struct menu *current_item)
+{
+ show_scroll_win(main_window,
+ "Global help", nconf_global_help);
+ return;
+}
+
+/* symbole help */
+static void handle_f2(int *key, struct menu *current_item)
+{
+ show_help(current_item);
+ return;
+}
+
+/* instructions */
+static void handle_f3(int *key, struct menu *current_item)
+{
+ show_scroll_win(main_window,
+ "Short help",
+ current_instructions);
+ return;
+}
+
+/* config */
+static void handle_f4(int *key, struct menu *current_item)
+{
+ int res = btn_dialog(main_window,
+ "Show all symbols?",
+ 2,
+ " <Show All> ",
+ "<Don't show all>");
+ if (res == 0)
+ show_all_items = 1;
+ else if (res == 1)
+ show_all_items = 0;
+
+ return;
+}
+
+/* back */
+static void handle_f5(int *key, struct menu *current_item)
+{
+ *key = KEY_LEFT;
+ return;
+}
+
+/* save */
+static void handle_f6(int *key, struct menu *current_item)
+{
+ conf_save();
+ return;
+}
+
+/* load */
+static void handle_f7(int *key, struct menu *current_item)
+{
+ conf_load();
+ return;
+}
+
+/* search */
+static void handle_f8(int *key, struct menu *current_item)
+{
+ search_conf();
+ return;
+}
+
+/* exit */
+static void handle_f9(int *key, struct menu *current_item)
+{
+ do_exit();
+ return;
+}
+
+/* return != 0 to indicate the key was handles */
+static int process_special_keys(int *key, struct menu *menu)
+{
+ int i;
+
+ if (*key == KEY_RESIZE) {
+ setup_windows();
+ return 1;
+ }
+
+ for (i = 0; i < function_keys_num; i++) {
+ if (*key == KEY_F(function_keys[i].key) ||
+ *key == '0' + function_keys[i].key){
+ function_keys[i].handler(key, menu);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static void clean_items(void)
+{
+ int i;
+ for (i = 0; curses_menu_items[i]; i++)
+ free_item(curses_menu_items[i]);
+ bzero(curses_menu_items, sizeof(curses_menu_items));
+ bzero(k_menu_items, sizeof(k_menu_items));
+ items_num = 0;
+}
+
+typedef enum {MATCH_TINKER_PATTERN_UP, MATCH_TINKER_PATTERN_DOWN,
+ FIND_NEXT_MATCH_DOWN, FIND_NEXT_MATCH_UP} match_f;
+
+/* return the index of the matched item, or -1 if no such item exists */
+static int get_mext_match(const char *match_str, match_f flag)
+{
+ int match_start, index;
+
+ /* Do not search if the menu is empty (i.e. items_num == 0) */
+ match_start = item_index(current_item(curses_menu));
+ if (match_start == ERR)
+ return -1;
+
+ if (flag == FIND_NEXT_MATCH_DOWN)
+ ++match_start;
+ else if (flag == FIND_NEXT_MATCH_UP)
+ --match_start;
+
+ match_start = (match_start + items_num) % items_num;
+ index = match_start;
+ while (true) {
+ char *str = k_menu_items[index].str;
+ if (strcasestr(str, match_str) != NULL)
+ return index;
+ if (flag == FIND_NEXT_MATCH_UP ||
+ flag == MATCH_TINKER_PATTERN_UP)
+ --index;
+ else
+ ++index;
+ index = (index + items_num) % items_num;
+ if (index == match_start)
+ return -1;
+ }
+}
+
+/* Make a new item. */
+static void item_make(struct menu *menu, char tag, const char *fmt, ...)
+{
+ va_list ap;
+
+ if (items_num > MAX_MENU_ITEMS-1)
+ return;
+
+ bzero(&k_menu_items[items_num], sizeof(k_menu_items[0]));
+ k_menu_items[items_num].tag = tag;
+ k_menu_items[items_num].usrptr = menu;
+ if (menu != NULL)
+ k_menu_items[items_num].is_visible =
+ menu_is_visible(menu);
+ else
+ k_menu_items[items_num].is_visible = 1;
+
+ va_start(ap, fmt);
+ vsnprintf(k_menu_items[items_num].str,
+ sizeof(k_menu_items[items_num].str),
+ fmt, ap);
+ va_end(ap);
+
+ if (!k_menu_items[items_num].is_visible)
+ memcpy(k_menu_items[items_num].str, "XXX", 3);
+
+ curses_menu_items[items_num] = new_item(
+ k_menu_items[items_num].str,
+ k_menu_items[items_num].str);
+ set_item_userptr(curses_menu_items[items_num],
+ &k_menu_items[items_num]);
+ /*
+ if (!k_menu_items[items_num].is_visible)
+ item_opts_off(curses_menu_items[items_num], O_SELECTABLE);
+ */
+
+ items_num++;
+ curses_menu_items[items_num] = NULL;
+}
+
+/* very hackish. adds a string to the last item added */
+static void item_add_str(const char *fmt, ...)
+{
+ va_list ap;
+ int index = items_num-1;
+ char new_str[256];
+ char tmp_str[256];
+
+ if (index < 0)
+ return;
+
+ va_start(ap, fmt);
+ vsnprintf(new_str, sizeof(new_str), fmt, ap);
+ va_end(ap);
+ snprintf(tmp_str, sizeof(tmp_str), "%s%s",
+ k_menu_items[index].str, new_str);
+ strncpy(k_menu_items[index].str,
+ tmp_str,
+ sizeof(k_menu_items[index].str));
+
+ free_item(curses_menu_items[index]);
+ curses_menu_items[index] = new_item(
+ k_menu_items[index].str,
+ k_menu_items[index].str);
+ set_item_userptr(curses_menu_items[index],
+ &k_menu_items[index]);
+}
+
+/* get the tag of the currently selected item */
+static char item_tag(void)
+{
+ ITEM *cur;
+ struct mitem *mcur;
+
+ cur = current_item(curses_menu);
+ if (cur == NULL)
+ return 0;
+ mcur = (struct mitem *) item_userptr(cur);
+ return mcur->tag;
+}
+
+static int curses_item_index(void)
+{
+ return item_index(current_item(curses_menu));
+}
+
+static void *item_data(void)
+{
+ ITEM *cur;
+ struct mitem *mcur;
+
+ cur = current_item(curses_menu);
+ if (!cur)
+ return NULL;
+ mcur = (struct mitem *) item_userptr(cur);
+ return mcur->usrptr;
+
+}
+
+static int item_is_tag(char tag)
+{
+ return item_tag() == tag;
+}
+
+static char filename[PATH_MAX+1];
+static char menu_backtitle[PATH_MAX+128];
+static void set_config_filename(const char *config_filename)
+{
+ snprintf(menu_backtitle, sizeof(menu_backtitle), "%s - %s",
+ config_filename, rootmenu.prompt->text);
+
+ snprintf(filename, sizeof(filename), "%s", config_filename);
+}
+
+/* return = 0 means we are successful.
+ * -1 means go on doing what you were doing
+ */
+static int do_exit(void)
+{
+ int res;
+ if (!conf_get_changed()) {
+ global_exit = 1;
+ return 0;
+ }
+ res = btn_dialog(main_window,
+ "Do you wish to save your new configuration?\n"
+ "<ESC> to cancel and resume nconfig.",
+ 2,
+ " <save> ",
+ "<don't save>");
+ if (res == KEY_EXIT) {
+ global_exit = 0;
+ return -1;
+ }
+
+ /* if we got here, the user really wants to exit */
+ switch (res) {
+ case 0:
+ res = conf_write(filename);
+ if (res)
+ btn_dialog(
+ main_window,
+ "Error during writing of configuration.\n"
+ "Your configuration changes were NOT saved.",
+ 1,
+ "<OK>");
+ conf_write_autoconf(0);
+ break;
+ default:
+ btn_dialog(
+ main_window,
+ "Your configuration changes were NOT saved.",
+ 1,
+ "<OK>");
+ break;
+ }
+ global_exit = 1;
+ return 0;
+}
+
+
+static void search_conf(void)
+{
+ struct symbol **sym_arr;
+ struct gstr res;
+ struct gstr title;
+ char *dialog_input;
+ int dres;
+
+ title = str_new();
+ str_printf( &title, "Enter (sub)string or regexp to search for "
+ "(with or without \"%s\")", CONFIG_);
+
+again:
+ dres = dialog_inputbox(main_window,
+ "Search Configuration Parameter",
+ str_get(&title),
+ "", &dialog_input_result, &dialog_input_result_len);
+ switch (dres) {
+ case 0:
+ break;
+ case 1:
+ show_scroll_win(main_window,
+ "Search Configuration", search_help);
+ goto again;
+ default:
+ str_free(&title);
+ return;
+ }
+
+ /* strip the prefix if necessary */
+ dialog_input = dialog_input_result;
+ if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
+ dialog_input += strlen(CONFIG_);
+
+ sym_arr = sym_re_search(dialog_input);
+ res = get_relations_str(sym_arr, NULL);
+ free(sym_arr);
+ show_scroll_win(main_window,
+ "Search Results", str_get(&res));
+ str_free(&res);
+ str_free(&title);
+}
+
+
+static void build_conf(struct menu *menu)
+{
+ struct symbol *sym;
+ struct property *prop;
+ struct menu *child;
+ int type, tmp, doint = 2;
+ tristate val;
+ char ch;
+
+ if (!menu || (!show_all_items && !menu_is_visible(menu)))
+ return;
+
+ sym = menu->sym;
+ prop = menu->prompt;
+ if (!sym) {
+ if (prop && menu != current_menu) {
+ const char *prompt = menu_get_prompt(menu);
+ enum prop_type ptype;
+ ptype = menu->prompt ? menu->prompt->type : P_UNKNOWN;
+ switch (ptype) {
+ case P_MENU:
+ child_count++;
+ if (single_menu_mode) {
+ item_make(menu, 'm',
+ "%s%*c%s",
+ menu->data ? "-->" : "++>",
+ indent + 1, ' ', prompt);
+ } else
+ item_make(menu, 'm',
+ " %*c%s %s",
+ indent + 1, ' ', prompt,
+ menu_is_empty(menu) ? "----" : "--->");
+
+ if (single_menu_mode && menu->data)
+ goto conf_childs;
+ return;
+ case P_COMMENT:
+ if (prompt) {
+ child_count++;
+ item_make(menu, ':',
+ " %*c*** %s ***",
+ indent + 1, ' ',
+ prompt);
+ }
+ break;
+ default:
+ if (prompt) {
+ child_count++;
+ item_make(menu, ':', "---%*c%s",
+ indent + 1, ' ',
+ prompt);
+ }
+ }
+ } else
+ doint = 0;
+ goto conf_childs;
+ }
+
+ type = sym_get_type(sym);
+ if (sym_is_choice(sym)) {
+ struct symbol *def_sym = sym_get_choice_value(sym);
+ struct menu *def_menu = NULL;
+
+ child_count++;
+ for (child = menu->list; child; child = child->next) {
+ if (menu_is_visible(child) && child->sym == def_sym)
+ def_menu = child;
+ }
+
+ val = sym_get_tristate_value(sym);
+ if (sym_is_changeable(sym)) {
+ switch (type) {
+ case S_BOOLEAN:
+ item_make(menu, 't', "[%c]",
+ val == no ? ' ' : '*');
+ break;
+ case S_TRISTATE:
+ switch (val) {
+ case yes:
+ ch = '*';
+ break;
+ case mod:
+ ch = 'M';
+ break;
+ default:
+ ch = ' ';
+ break;
+ }
+ item_make(menu, 't', "<%c>", ch);
+ break;
+ }
+ } else {
+ item_make(menu, def_menu ? 't' : ':', " ");
+ }
+
+ item_add_str("%*c%s", indent + 1,
+ ' ', menu_get_prompt(menu));
+ if (val == yes) {
+ if (def_menu) {
+ item_add_str(" (%s)",
+ menu_get_prompt(def_menu));
+ item_add_str(" --->");
+ if (def_menu->list) {
+ indent += 2;
+ build_conf(def_menu);
+ indent -= 2;
+ }
+ }
+ return;
+ }
+ } else {
+ if (menu == current_menu) {
+ item_make(menu, ':',
+ "---%*c%s", indent + 1,
+ ' ', menu_get_prompt(menu));
+ goto conf_childs;
+ }
+ child_count++;
+ val = sym_get_tristate_value(sym);
+ if (sym_is_choice_value(sym) && val == yes) {
+ item_make(menu, ':', " ");
+ } else {
+ switch (type) {
+ case S_BOOLEAN:
+ if (sym_is_changeable(sym))
+ item_make(menu, 't', "[%c]",
+ val == no ? ' ' : '*');
+ else
+ item_make(menu, 't', "-%c-",
+ val == no ? ' ' : '*');
+ break;
+ case S_TRISTATE:
+ switch (val) {
+ case yes:
+ ch = '*';
+ break;
+ case mod:
+ ch = 'M';
+ break;
+ default:
+ ch = ' ';
+ break;
+ }
+ if (sym_is_changeable(sym)) {
+ if (sym->rev_dep.tri == mod)
+ item_make(menu,
+ 't', "{%c}", ch);
+ else
+ item_make(menu,
+ 't', "<%c>", ch);
+ } else
+ item_make(menu, 't', "-%c-", ch);
+ break;
+ default:
+ tmp = 2 + strlen(sym_get_string_value(sym));
+ item_make(menu, 's', " (%s)",
+ sym_get_string_value(sym));
+ tmp = indent - tmp + 4;
+ if (tmp < 0)
+ tmp = 0;
+ item_add_str("%*c%s%s", tmp, ' ',
+ menu_get_prompt(menu),
+ (sym_has_value(sym) ||
+ !sym_is_changeable(sym)) ? "" :
+ " (NEW)");
+ goto conf_childs;
+ }
+ }
+ item_add_str("%*c%s%s", indent + 1, ' ',
+ menu_get_prompt(menu),
+ (sym_has_value(sym) || !sym_is_changeable(sym)) ?
+ "" : " (NEW)");
+ if (menu->prompt && menu->prompt->type == P_MENU) {
+ item_add_str(" %s", menu_is_empty(menu) ? "----" : "--->");
+ return;
+ }
+ }
+
+conf_childs:
+ indent += doint;
+ for (child = menu->list; child; child = child->next)
+ build_conf(child);
+ indent -= doint;
+}
+
+static void reset_menu(void)
+{
+ unpost_menu(curses_menu);
+ clean_items();
+}
+
+/* adjust the menu to show this item.
+ * prefer not to scroll the menu if possible*/
+static void center_item(int selected_index, int *last_top_row)
+{
+ int toprow;
+
+ set_top_row(curses_menu, *last_top_row);
+ toprow = top_row(curses_menu);
+ if (selected_index < toprow ||
+ selected_index >= toprow+mwin_max_lines) {
+ toprow = max(selected_index-mwin_max_lines/2, 0);
+ if (toprow >= item_count(curses_menu)-mwin_max_lines)
+ toprow = item_count(curses_menu)-mwin_max_lines;
+ set_top_row(curses_menu, toprow);
+ }
+ set_current_item(curses_menu,
+ curses_menu_items[selected_index]);
+ *last_top_row = toprow;
+ post_menu(curses_menu);
+ refresh_all_windows(main_window);
+}
+
+/* this function assumes reset_menu has been called before */
+static void show_menu(const char *prompt, const char *instructions,
+ int selected_index, int *last_top_row)
+{
+ int maxx, maxy;
+ WINDOW *menu_window;
+
+ current_instructions = instructions;
+
+ clear();
+ print_in_middle(stdscr, 1, getmaxx(stdscr),
+ menu_backtitle,
+ attr_main_heading);
+
+ wattrset(main_window, attr_main_menu_box);
+ box(main_window, 0, 0);
+ wattrset(main_window, attr_main_menu_heading);
+ mvwprintw(main_window, 0, 3, " %s ", prompt);
+ wattrset(main_window, attr_normal);
+
+ set_menu_items(curses_menu, curses_menu_items);
+
+ /* position the menu at the middle of the screen */
+ scale_menu(curses_menu, &maxy, &maxx);
+ maxx = min(maxx, mwin_max_cols-2);
+ maxy = mwin_max_lines;
+ menu_window = derwin(main_window,
+ maxy,
+ maxx,
+ 2,
+ (mwin_max_cols-maxx)/2);
+ keypad(menu_window, TRUE);
+ set_menu_win(curses_menu, menu_window);
+ set_menu_sub(curses_menu, menu_window);
+
+ /* must reassert this after changing items, otherwise returns to a
+ * default of 16
+ */
+ set_menu_format(curses_menu, maxy, 1);
+ center_item(selected_index, last_top_row);
+ set_menu_format(curses_menu, maxy, 1);
+
+ print_function_line();
+
+ /* Post the menu */
+ post_menu(curses_menu);
+ refresh_all_windows(main_window);
+}
+
+static void adj_match_dir(match_f *match_direction)
+{
+ if (*match_direction == FIND_NEXT_MATCH_DOWN)
+ *match_direction =
+ MATCH_TINKER_PATTERN_DOWN;
+ else if (*match_direction == FIND_NEXT_MATCH_UP)
+ *match_direction =
+ MATCH_TINKER_PATTERN_UP;
+ /* else, do no change.. */
+}
+
+struct match_state
+{
+ int in_search;
+ match_f match_direction;
+ char pattern[256];
+};
+
+/* Return 0 means I have handled the key. In such a case, ans should hold the
+ * item to center, or -1 otherwise.
+ * Else return -1 .
+ */
+static int do_match(int key, struct match_state *state, int *ans)
+{
+ char c = (char) key;
+ int terminate_search = 0;
+ *ans = -1;
+ if (key == '/' || (state->in_search && key == 27)) {
+ move(0, 0);
+ refresh();
+ clrtoeol();
+ state->in_search = 1-state->in_search;
+ bzero(state->pattern, sizeof(state->pattern));
+ state->match_direction = MATCH_TINKER_PATTERN_DOWN;
+ return 0;
+ } else if (!state->in_search)
+ return 1;
+
+ if (isalnum(c) || isgraph(c) || c == ' ') {
+ state->pattern[strlen(state->pattern)] = c;
+ state->pattern[strlen(state->pattern)] = '\0';
+ adj_match_dir(&state->match_direction);
+ *ans = get_mext_match(state->pattern,
+ state->match_direction);
+ } else if (key == KEY_DOWN) {
+ state->match_direction = FIND_NEXT_MATCH_DOWN;
+ *ans = get_mext_match(state->pattern,
+ state->match_direction);
+ } else if (key == KEY_UP) {
+ state->match_direction = FIND_NEXT_MATCH_UP;
+ *ans = get_mext_match(state->pattern,
+ state->match_direction);
+ } else if (key == KEY_BACKSPACE || key == 8 || key == 127) {
+ state->pattern[strlen(state->pattern)-1] = '\0';
+ adj_match_dir(&state->match_direction);
+ } else
+ terminate_search = 1;
+
+ if (terminate_search) {
+ state->in_search = 0;
+ bzero(state->pattern, sizeof(state->pattern));
+ move(0, 0);
+ refresh();
+ clrtoeol();
+ return -1;
+ }
+ return 0;
+}
+
+static void conf(struct menu *menu)
+{
+ struct menu *submenu = NULL;
+ struct symbol *sym;
+ int res;
+ int current_index = 0;
+ int last_top_row = 0;
+ struct match_state match_state = {
+ .in_search = 0,
+ .match_direction = MATCH_TINKER_PATTERN_DOWN,
+ .pattern = "",
+ };
+
+ while (!global_exit) {
+ reset_menu();
+ current_menu = menu;
+ build_conf(menu);
+ if (!child_count)
+ break;
+
+ show_menu(menu_get_prompt(menu), menu_instructions,
+ current_index, &last_top_row);
+ keypad((menu_win(curses_menu)), TRUE);
+ while (!global_exit) {
+ if (match_state.in_search) {
+ mvprintw(0, 0,
+ "searching: %s", match_state.pattern);
+ clrtoeol();
+ }
+ refresh_all_windows(main_window);
+ res = wgetch(menu_win(curses_menu));
+ if (!res)
+ break;
+ if (do_match(res, &match_state, ¤t_index) == 0) {
+ if (current_index != -1)
+ center_item(current_index,
+ &last_top_row);
+ continue;
+ }
+ if (process_special_keys(&res,
+ (struct menu *) item_data()))
+ break;
+ switch (res) {
+ case KEY_DOWN:
+ menu_driver(curses_menu, REQ_DOWN_ITEM);
+ break;
+ case KEY_UP:
+ menu_driver(curses_menu, REQ_UP_ITEM);
+ break;
+ case KEY_NPAGE:
+ menu_driver(curses_menu, REQ_SCR_DPAGE);
+ break;
+ case KEY_PPAGE:
+ menu_driver(curses_menu, REQ_SCR_UPAGE);
+ break;
+ case KEY_HOME:
+ menu_driver(curses_menu, REQ_FIRST_ITEM);
+ break;
+ case KEY_END:
+ menu_driver(curses_menu, REQ_LAST_ITEM);
+ break;
+ case 'h':
+ case '?':
+ show_help((struct menu *) item_data());
+ break;
+ }
+ if (res == 10 || res == 27 ||
+ res == 32 || res == 'n' || res == 'y' ||
+ res == KEY_LEFT || res == KEY_RIGHT ||
+ res == 'm')
+ break;
+ refresh_all_windows(main_window);
+ }
+
+ refresh_all_windows(main_window);
+ /* if ESC or left*/
+ if (res == 27 || (menu != &rootmenu && res == KEY_LEFT))
+ break;
+
+ /* remember location in the menu */
+ last_top_row = top_row(curses_menu);
+ current_index = curses_item_index();
+
+ if (!item_tag())
+ continue;
+
+ submenu = (struct menu *) item_data();
+ if (!submenu || !menu_is_visible(submenu))
+ continue;
+ sym = submenu->sym;
+
+ switch (res) {
+ case ' ':
+ if (item_is_tag('t'))
+ sym_toggle_tristate_value(sym);
+ else if (item_is_tag('m'))
+ conf(submenu);
+ break;
+ case KEY_RIGHT:
+ case 10: /* ENTER WAS PRESSED */
+ switch (item_tag()) {
+ case 'm':
+ if (single_menu_mode)
+ submenu->data =
+ (void *) (long) !submenu->data;
+ else
+ conf(submenu);
+ break;
+ case 't':
+ if (sym_is_choice(sym) &&
+ sym_get_tristate_value(sym) == yes)
+ conf_choice(submenu);
+ else if (submenu->prompt &&
+ submenu->prompt->type == P_MENU)
+ conf(submenu);
+ else if (res == 10)
+ sym_toggle_tristate_value(sym);
+ break;
+ case 's':
+ conf_string(submenu);
+ break;
+ }
+ break;
+ case 'y':
+ if (item_is_tag('t')) {
+ if (sym_set_tristate_value(sym, yes))
+ break;
+ if (sym_set_tristate_value(sym, mod))
+ btn_dialog(main_window, setmod_text, 0);
+ }
+ break;
+ case 'n':
+ if (item_is_tag('t'))
+ sym_set_tristate_value(sym, no);
+ break;
+ case 'm':
+ if (item_is_tag('t'))
+ sym_set_tristate_value(sym, mod);
+ break;
+ }
+ }
+}
+
+static void conf_message_callback(const char *s)
+{
+ btn_dialog(main_window, s, 1, "<OK>");
+}
+
+static void show_help(struct menu *menu)
+{
+ struct gstr help;
+
+ if (!menu)
+ return;
+
+ help = str_new();
+ menu_get_ext_help(menu, &help);
+ show_scroll_win(main_window, menu_get_prompt(menu), str_get(&help));
+ str_free(&help);
+}
+
+static void conf_choice(struct menu *menu)
+{
+ const char *prompt = menu_get_prompt(menu);
+ struct menu *child = NULL;
+ struct symbol *active;
+ int selected_index = 0;
+ int last_top_row = 0;
+ int res, i = 0;
+ struct match_state match_state = {
+ .in_search = 0,
+ .match_direction = MATCH_TINKER_PATTERN_DOWN,
+ .pattern = "",
+ };
+
+ active = sym_get_choice_value(menu->sym);
+ /* this is mostly duplicated from the conf() function. */
+ while (!global_exit) {
+ reset_menu();
+
+ for (i = 0, child = menu->list; child; child = child->next) {
+ if (!show_all_items && !menu_is_visible(child))
+ continue;
+
+ if (child->sym == sym_get_choice_value(menu->sym))
+ item_make(child, ':', "<X> %s",
+ menu_get_prompt(child));
+ else if (child->sym)
+ item_make(child, ':', " %s",
+ menu_get_prompt(child));
+ else
+ item_make(child, ':', "*** %s ***",
+ menu_get_prompt(child));
+
+ if (child->sym == active){
+ last_top_row = top_row(curses_menu);
+ selected_index = i;
+ }
+ i++;
+ }
+ show_menu(prompt ? prompt : "Choice Menu",
+ radiolist_instructions,
+ selected_index,
+ &last_top_row);
+ while (!global_exit) {
+ if (match_state.in_search) {
+ mvprintw(0, 0, "searching: %s",
+ match_state.pattern);
+ clrtoeol();
+ }
+ refresh_all_windows(main_window);
+ res = wgetch(menu_win(curses_menu));
+ if (!res)
+ break;
+ if (do_match(res, &match_state, &selected_index) == 0) {
+ if (selected_index != -1)
+ center_item(selected_index,
+ &last_top_row);
+ continue;
+ }
+ if (process_special_keys(
+ &res,
+ (struct menu *) item_data()))
+ break;
+ switch (res) {
+ case KEY_DOWN:
+ menu_driver(curses_menu, REQ_DOWN_ITEM);
+ break;
+ case KEY_UP:
+ menu_driver(curses_menu, REQ_UP_ITEM);
+ break;
+ case KEY_NPAGE:
+ menu_driver(curses_menu, REQ_SCR_DPAGE);
+ break;
+ case KEY_PPAGE:
+ menu_driver(curses_menu, REQ_SCR_UPAGE);
+ break;
+ case KEY_HOME:
+ menu_driver(curses_menu, REQ_FIRST_ITEM);
+ break;
+ case KEY_END:
+ menu_driver(curses_menu, REQ_LAST_ITEM);
+ break;
+ case 'h':
+ case '?':
+ show_help((struct menu *) item_data());
+ break;
+ }
+ if (res == 10 || res == 27 || res == ' ' ||
+ res == KEY_LEFT){
+ break;
+ }
+ refresh_all_windows(main_window);
+ }
+ /* if ESC or left */
+ if (res == 27 || res == KEY_LEFT)
+ break;
+
+ child = item_data();
+ if (!child || !menu_is_visible(child) || !child->sym)
+ continue;
+ switch (res) {
+ case ' ':
+ case 10:
+ case KEY_RIGHT:
+ sym_set_tristate_value(child->sym, yes);
+ return;
+ case 'h':
+ case '?':
+ show_help(child);
+ active = child->sym;
+ break;
+ case KEY_EXIT:
+ return;
+ }
+ }
+}
+
+static void conf_string(struct menu *menu)
+{
+ const char *prompt = menu_get_prompt(menu);
+
+ while (1) {
+ int res;
+ const char *heading;
+
+ switch (sym_get_type(menu->sym)) {
+ case S_INT:
+ heading = inputbox_instructions_int;
+ break;
+ case S_HEX:
+ heading = inputbox_instructions_hex;
+ break;
+ case S_STRING:
+ heading = inputbox_instructions_string;
+ break;
+ default:
+ heading = "Internal nconf error!";
+ }
+ res = dialog_inputbox(main_window,
+ prompt ? prompt : "Main Menu",
+ heading,
+ sym_get_string_value(menu->sym),
+ &dialog_input_result,
+ &dialog_input_result_len);
+ switch (res) {
+ case 0:
+ if (sym_set_string_value(menu->sym,
+ dialog_input_result))
+ return;
+ btn_dialog(main_window,
+ "You have made an invalid entry.", 0);
+ break;
+ case 1:
+ show_help(menu);
+ break;
+ case KEY_EXIT:
+ return;
+ }
+ }
+}
+
+static void conf_load(void)
+{
+ while (1) {
+ int res;
+ res = dialog_inputbox(main_window,
+ NULL, load_config_text,
+ filename,
+ &dialog_input_result,
+ &dialog_input_result_len);
+ switch (res) {
+ case 0:
+ if (!dialog_input_result[0])
+ return;
+ if (!conf_read(dialog_input_result)) {
+ set_config_filename(dialog_input_result);
+ conf_set_changed(true);
+ return;
+ }
+ btn_dialog(main_window, "File does not exist!", 0);
+ break;
+ case 1:
+ show_scroll_win(main_window,
+ "Load Alternate Configuration",
+ load_config_help);
+ break;
+ case KEY_EXIT:
+ return;
+ }
+ }
+}
+
+static void conf_save(void)
+{
+ while (1) {
+ int res;
+ res = dialog_inputbox(main_window,
+ NULL, save_config_text,
+ filename,
+ &dialog_input_result,
+ &dialog_input_result_len);
+ switch (res) {
+ case 0:
+ if (!dialog_input_result[0])
+ return;
+ res = conf_write(dialog_input_result);
+ if (!res) {
+ set_config_filename(dialog_input_result);
+ return;
+ }
+ btn_dialog(main_window, "Can't create file!",
+ 1, "<OK>");
+ break;
+ case 1:
+ show_scroll_win(main_window,
+ "Save Alternate Configuration",
+ save_config_help);
+ break;
+ case KEY_EXIT:
+ return;
+ }
+ }
+}
+
+static void setup_windows(void)
+{
+ int lines, columns;
+
+ getmaxyx(stdscr, lines, columns);
+
+ if (main_window != NULL)
+ delwin(main_window);
+
+ /* set up the menu and menu window */
+ main_window = newwin(lines-2, columns-2, 2, 1);
+ keypad(main_window, TRUE);
+ mwin_max_lines = lines-7;
+ mwin_max_cols = columns-6;
+
+ /* panels order is from bottom to top */
+ new_panel(main_window);
+}
+
+int main(int ac, char **av)
+{
+ int lines, columns;
+ char *mode;
+
+ if (ac > 1 && strcmp(av[1], "-s") == 0) {
+ /* Silence conf_read() until the real callback is set up */
+ conf_set_message_callback(NULL);
+ av++;
+ }
+ conf_parse(av[1]);
+ conf_read(NULL);
+
+ mode = getenv("NCONFIG_MODE");
+ if (mode) {
+ if (!strcasecmp(mode, "single_menu"))
+ single_menu_mode = 1;
+ }
+
+ /* Initialize curses */
+ initscr();
+ /* set color theme */
+ set_colors();
+
+ cbreak();
+ noecho();
+ keypad(stdscr, TRUE);
+ curs_set(0);
+
+ getmaxyx(stdscr, lines, columns);
+ if (columns < 75 || lines < 20) {
+ endwin();
+ printf("Your terminal should have at "
+ "least 20 lines and 75 columns\n");
+ return 1;
+ }
+
+ notimeout(stdscr, FALSE);
+#if NCURSES_REENTRANT
+ set_escdelay(1);
+#else
+ ESCDELAY = 1;
+#endif
+
+ /* set btns menu */
+ curses_menu = new_menu(curses_menu_items);
+ menu_opts_off(curses_menu, O_SHOWDESC);
+ menu_opts_on(curses_menu, O_SHOWMATCH);
+ menu_opts_on(curses_menu, O_ONEVALUE);
+ menu_opts_on(curses_menu, O_NONCYCLIC);
+ menu_opts_on(curses_menu, O_IGNORECASE);
+ set_menu_mark(curses_menu, " ");
+ set_menu_fore(curses_menu, attr_main_menu_fore);
+ set_menu_back(curses_menu, attr_main_menu_back);
+ set_menu_grey(curses_menu, attr_main_menu_grey);
+
+ set_config_filename(conf_get_configname());
+ setup_windows();
+
+ /* check for KEY_FUNC(1) */
+ if (has_key(KEY_F(1)) == FALSE) {
+ show_scroll_win(main_window,
+ "Instructions",
+ menu_no_f_instructions);
+ }
+
+ conf_set_message_callback(conf_message_callback);
+ /* do the work */
+ while (!global_exit) {
+ conf(&rootmenu);
+ if (!global_exit && do_exit() == 0)
+ break;
+ }
+ /* ok, we are done */
+ unpost_menu(curses_menu);
+ free_menu(curses_menu);
+ delwin(main_window);
+ clear();
+ refresh();
+ endwin();
+ return 0;
+}
diff --git a/backport/kconf/nconf.gui.c b/backport/kconf/nconf.gui.c
new file mode 100644
index 000000000000..9aedf40f1dc0
--- /dev/null
+++ b/backport/kconf/nconf.gui.c
@@ -0,0 +1,614 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2008 Nir Tzachar <nir.tzachar@gmail.com>
+ *
+ * Derived from menuconfig.
+ */
+#include "nconf.h"
+#include "lkc.h"
+
+int attr_normal;
+int attr_main_heading;
+int attr_main_menu_box;
+int attr_main_menu_fore;
+int attr_main_menu_back;
+int attr_main_menu_grey;
+int attr_main_menu_heading;
+int attr_scrollwin_text;
+int attr_scrollwin_heading;
+int attr_scrollwin_box;
+int attr_dialog_text;
+int attr_dialog_menu_fore;
+int attr_dialog_menu_back;
+int attr_dialog_box;
+int attr_input_box;
+int attr_input_heading;
+int attr_input_text;
+int attr_input_field;
+int attr_function_text;
+int attr_function_highlight;
+
+#define COLOR_ATTR(_at, _fg, _bg, _hl) \
+ { .attr = &(_at), .has_color = true, .color_fg = _fg, .color_bg = _bg, .highlight = _hl }
+#define NO_COLOR_ATTR(_at, _hl) \
+ { .attr = &(_at), .has_color = false, .highlight = _hl }
+#define COLOR_DEFAULT -1
+
+struct nconf_attr_param {
+ int *attr;
+ bool has_color;
+ int color_fg;
+ int color_bg;
+ int highlight;
+};
+
+static const struct nconf_attr_param color_theme_params[] = {
+ COLOR_ATTR(attr_normal, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL),
+ COLOR_ATTR(attr_main_heading, COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD | A_UNDERLINE),
+ COLOR_ATTR(attr_main_menu_box, COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL),
+ COLOR_ATTR(attr_main_menu_fore, COLOR_DEFAULT, COLOR_DEFAULT, A_REVERSE),
+ COLOR_ATTR(attr_main_menu_back, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL),
+ COLOR_ATTR(attr_main_menu_grey, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL),
+ COLOR_ATTR(attr_main_menu_heading, COLOR_GREEN, COLOR_DEFAULT, A_BOLD),
+ COLOR_ATTR(attr_scrollwin_text, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL),
+ COLOR_ATTR(attr_scrollwin_heading, COLOR_GREEN, COLOR_DEFAULT, A_BOLD),
+ COLOR_ATTR(attr_scrollwin_box, COLOR_YELLOW, COLOR_DEFAULT, A_BOLD),
+ COLOR_ATTR(attr_dialog_text, COLOR_DEFAULT, COLOR_DEFAULT, A_BOLD),
+ COLOR_ATTR(attr_dialog_menu_fore, COLOR_RED, COLOR_DEFAULT, A_STANDOUT),
+ COLOR_ATTR(attr_dialog_menu_back, COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL),
+ COLOR_ATTR(attr_dialog_box, COLOR_YELLOW, COLOR_DEFAULT, A_BOLD),
+ COLOR_ATTR(attr_input_box, COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL),
+ COLOR_ATTR(attr_input_heading, COLOR_GREEN, COLOR_DEFAULT, A_BOLD),
+ COLOR_ATTR(attr_input_text, COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL),
+ COLOR_ATTR(attr_input_field, COLOR_DEFAULT, COLOR_DEFAULT, A_UNDERLINE),
+ COLOR_ATTR(attr_function_text, COLOR_YELLOW, COLOR_DEFAULT, A_REVERSE),
+ COLOR_ATTR(attr_function_highlight, COLOR_DEFAULT, COLOR_DEFAULT, A_BOLD),
+ { /* sentinel */ }
+};
+
+static const struct nconf_attr_param no_color_theme_params[] = {
+ NO_COLOR_ATTR(attr_normal, A_NORMAL),
+ NO_COLOR_ATTR(attr_main_heading, A_BOLD | A_UNDERLINE),
+ NO_COLOR_ATTR(attr_main_menu_box, A_NORMAL),
+ NO_COLOR_ATTR(attr_main_menu_fore, A_STANDOUT),
+ NO_COLOR_ATTR(attr_main_menu_back, A_NORMAL),
+ NO_COLOR_ATTR(attr_main_menu_grey, A_NORMAL),
+ NO_COLOR_ATTR(attr_main_menu_heading, A_BOLD),
+ NO_COLOR_ATTR(attr_scrollwin_text, A_NORMAL),
+ NO_COLOR_ATTR(attr_scrollwin_heading, A_BOLD),
+ NO_COLOR_ATTR(attr_scrollwin_box, A_BOLD),
+ NO_COLOR_ATTR(attr_dialog_text, A_NORMAL),
+ NO_COLOR_ATTR(attr_dialog_menu_fore, A_STANDOUT),
+ NO_COLOR_ATTR(attr_dialog_menu_back, A_NORMAL),
+ NO_COLOR_ATTR(attr_dialog_box, A_BOLD),
+ NO_COLOR_ATTR(attr_input_box, A_BOLD),
+ NO_COLOR_ATTR(attr_input_heading, A_BOLD),
+ NO_COLOR_ATTR(attr_input_text, A_NORMAL),
+ NO_COLOR_ATTR(attr_input_field, A_UNDERLINE),
+ NO_COLOR_ATTR(attr_function_text, A_REVERSE),
+ NO_COLOR_ATTR(attr_function_highlight, A_BOLD),
+ { /* sentinel */ }
+};
+
+void set_colors(void)
+{
+ const struct nconf_attr_param *p;
+ int pair = 0;
+
+ if (has_colors()) {
+ start_color();
+ use_default_colors();
+ p = color_theme_params;
+ } else {
+ p = no_color_theme_params;
+ }
+
+ for (; p->attr; p++) {
+ int attr = p->highlight;
+
+ if (p->has_color) {
+ pair++;
+ init_pair(pair, p->color_fg, p->color_bg);
+ attr |= COLOR_PAIR(pair);
+ }
+
+ *p->attr = attr;
+ }
+}
+
+/* this changes the windows attributes !!! */
+void print_in_middle(WINDOW *win, int y, int width, const char *str, int attrs)
+{
+ wattrset(win, attrs);
+ mvwprintw(win, y, (width - strlen(str)) / 2, "%s", str);
+}
+
+int get_line_no(const char *text)
+{
+ int i;
+ int total = 1;
+
+ if (!text)
+ return 0;
+
+ for (i = 0; text[i] != '\0'; i++)
+ if (text[i] == '\n')
+ total++;
+ return total;
+}
+
+const char *get_line(const char *text, int line_no)
+{
+ int i;
+ int lines = 0;
+
+ if (!text)
+ return NULL;
+
+ for (i = 0; text[i] != '\0' && lines < line_no; i++)
+ if (text[i] == '\n')
+ lines++;
+ return text+i;
+}
+
+int get_line_length(const char *line)
+{
+ int res = 0;
+ while (*line != '\0' && *line != '\n') {
+ line++;
+ res++;
+ }
+ return res;
+}
+
+/* print all lines to the window. */
+void fill_window(WINDOW *win, const char *text)
+{
+ int x, y;
+ int total_lines = get_line_no(text);
+ int i;
+
+ getmaxyx(win, y, x);
+ /* do not go over end of line */
+ total_lines = min(total_lines, y);
+ for (i = 0; i < total_lines; i++) {
+ char tmp[x+10];
+ const char *line = get_line(text, i);
+ int len = get_line_length(line);
+ strncpy(tmp, line, min(len, x));
+ tmp[len] = '\0';
+ mvwprintw(win, i, 0, "%s", tmp);
+ }
+}
+
+/* get the message, and buttons.
+ * each button must be a char*
+ * return the selected button
+ *
+ * this dialog is used for 2 different things:
+ * 1) show a text box, no buttons.
+ * 2) show a dialog, with horizontal buttons
+ */
+int btn_dialog(WINDOW *main_window, const char *msg, int btn_num, ...)
+{
+ va_list ap;
+ char *btn;
+ int btns_width = 0;
+ int msg_lines = 0;
+ int msg_width = 0;
+ int total_width;
+ int win_rows = 0;
+ WINDOW *win;
+ WINDOW *msg_win;
+ WINDOW *menu_win;
+ MENU *menu;
+ ITEM *btns[btn_num+1];
+ int i, x, y;
+ int res = -1;
+
+
+ va_start(ap, btn_num);
+ for (i = 0; i < btn_num; i++) {
+ btn = va_arg(ap, char *);
+ btns[i] = new_item(btn, "");
+ btns_width += strlen(btn)+1;
+ }
+ va_end(ap);
+ btns[btn_num] = NULL;
+
+ /* find the widest line of msg: */
+ msg_lines = get_line_no(msg);
+ for (i = 0; i < msg_lines; i++) {
+ const char *line = get_line(msg, i);
+ int len = get_line_length(line);
+ if (msg_width < len)
+ msg_width = len;
+ }
+
+ total_width = max(msg_width, btns_width);
+ /* place dialog in middle of screen */
+ y = (getmaxy(stdscr)-(msg_lines+4))/2;
+ x = (getmaxx(stdscr)-(total_width+4))/2;
+
+
+ /* create the windows */
+ if (btn_num > 0)
+ win_rows = msg_lines+4;
+ else
+ win_rows = msg_lines+2;
+
+ win = newwin(win_rows, total_width+4, y, x);
+ keypad(win, TRUE);
+ menu_win = derwin(win, 1, btns_width, win_rows-2,
+ 1+(total_width+2-btns_width)/2);
+ menu = new_menu(btns);
+ msg_win = derwin(win, win_rows-2, msg_width, 1,
+ 1+(total_width+2-msg_width)/2);
+
+ set_menu_fore(menu, attr_dialog_menu_fore);
+ set_menu_back(menu, attr_dialog_menu_back);
+
+ wattrset(win, attr_dialog_box);
+ box(win, 0, 0);
+
+ /* print message */
+ wattrset(msg_win, attr_dialog_text);
+ fill_window(msg_win, msg);
+
+ set_menu_win(menu, win);
+ set_menu_sub(menu, menu_win);
+ set_menu_format(menu, 1, btn_num);
+ menu_opts_off(menu, O_SHOWDESC);
+ menu_opts_off(menu, O_SHOWMATCH);
+ menu_opts_on(menu, O_ONEVALUE);
+ menu_opts_on(menu, O_NONCYCLIC);
+ set_menu_mark(menu, "");
+ post_menu(menu);
+
+
+ touchwin(win);
+ refresh_all_windows(main_window);
+ while ((res = wgetch(win))) {
+ switch (res) {
+ case KEY_LEFT:
+ menu_driver(menu, REQ_LEFT_ITEM);
+ break;
+ case KEY_RIGHT:
+ menu_driver(menu, REQ_RIGHT_ITEM);
+ break;
+ case 10: /* ENTER */
+ case 27: /* ESCAPE */
+ case ' ':
+ case KEY_F(F_BACK):
+ case KEY_F(F_EXIT):
+ break;
+ }
+ touchwin(win);
+ refresh_all_windows(main_window);
+
+ if (res == 10 || res == ' ') {
+ res = item_index(current_item(menu));
+ break;
+ } else if (res == 27 || res == KEY_F(F_BACK) ||
+ res == KEY_F(F_EXIT)) {
+ res = KEY_EXIT;
+ break;
+ }
+ }
+
+ unpost_menu(menu);
+ free_menu(menu);
+ for (i = 0; i < btn_num; i++)
+ free_item(btns[i]);
+
+ delwin(win);
+ return res;
+}
+
+int dialog_inputbox(WINDOW *main_window,
+ const char *title, const char *prompt,
+ const char *init, char **resultp, int *result_len)
+{
+ int prompt_lines = 0;
+ int prompt_width = 0;
+ WINDOW *win;
+ WINDOW *prompt_win;
+ WINDOW *form_win;
+ PANEL *panel;
+ int i, x, y, lines, columns, win_lines, win_cols;
+ int res = -1;
+ int cursor_position = strlen(init);
+ int cursor_form_win;
+ char *result = *resultp;
+
+ getmaxyx(stdscr, lines, columns);
+
+ if (strlen(init)+1 > *result_len) {
+ *result_len = strlen(init)+1;
+ *resultp = result = xrealloc(result, *result_len);
+ }
+
+ /* find the widest line of msg: */
+ prompt_lines = get_line_no(prompt);
+ for (i = 0; i < prompt_lines; i++) {
+ const char *line = get_line(prompt, i);
+ int len = get_line_length(line);
+ prompt_width = max(prompt_width, len);
+ }
+
+ if (title)
+ prompt_width = max(prompt_width, strlen(title));
+
+ win_lines = min(prompt_lines+6, lines-2);
+ win_cols = min(prompt_width+7, columns-2);
+ prompt_lines = max(win_lines-6, 0);
+ prompt_width = max(win_cols-7, 0);
+
+ /* place dialog in middle of screen */
+ y = (lines-win_lines)/2;
+ x = (columns-win_cols)/2;
+
+ strncpy(result, init, *result_len);
+
+ /* create the windows */
+ win = newwin(win_lines, win_cols, y, x);
+ prompt_win = derwin(win, prompt_lines+1, prompt_width, 2, 2);
+ form_win = derwin(win, 1, prompt_width, prompt_lines+3, 2);
+ keypad(form_win, TRUE);
+
+ wattrset(form_win, attr_input_field);
+
+ wattrset(win, attr_input_box);
+ box(win, 0, 0);
+ wattrset(win, attr_input_heading);
+ if (title)
+ mvwprintw(win, 0, 3, "%s", title);
+
+ /* print message */
+ wattrset(prompt_win, attr_input_text);
+ fill_window(prompt_win, prompt);
+
+ mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
+ cursor_form_win = min(cursor_position, prompt_width-1);
+ mvwprintw(form_win, 0, 0, "%s",
+ result + cursor_position-cursor_form_win);
+
+ /* create panels */
+ panel = new_panel(win);
+
+ /* show the cursor */
+ curs_set(1);
+
+ touchwin(win);
+ refresh_all_windows(main_window);
+ while ((res = wgetch(form_win))) {
+ int len = strlen(result);
+ switch (res) {
+ case 10: /* ENTER */
+ case 27: /* ESCAPE */
+ case KEY_F(F_HELP):
+ case KEY_F(F_EXIT):
+ case KEY_F(F_BACK):
+ break;
+ case 8: /* ^H */
+ case 127: /* ^? */
+ case KEY_BACKSPACE:
+ if (cursor_position > 0) {
+ memmove(&result[cursor_position-1],
+ &result[cursor_position],
+ len-cursor_position+1);
+ cursor_position--;
+ cursor_form_win--;
+ len--;
+ }
+ break;
+ case KEY_DC:
+ if (cursor_position >= 0 && cursor_position < len) {
+ memmove(&result[cursor_position],
+ &result[cursor_position+1],
+ len-cursor_position+1);
+ len--;
+ }
+ break;
+ case KEY_UP:
+ case KEY_RIGHT:
+ if (cursor_position < len) {
+ cursor_position++;
+ cursor_form_win++;
+ }
+ break;
+ case KEY_DOWN:
+ case KEY_LEFT:
+ if (cursor_position > 0) {
+ cursor_position--;
+ cursor_form_win--;
+ }
+ break;
+ case KEY_HOME:
+ cursor_position = 0;
+ cursor_form_win = 0;
+ break;
+ case KEY_END:
+ cursor_position = len;
+ cursor_form_win = min(cursor_position, prompt_width-1);
+ break;
+ default:
+ if ((isgraph(res) || isspace(res))) {
+ /* one for new char, one for '\0' */
+ if (len+2 > *result_len) {
+ *result_len = len+2;
+ *resultp = result = realloc(result,
+ *result_len);
+ }
+ /* insert the char at the proper position */
+ memmove(&result[cursor_position+1],
+ &result[cursor_position],
+ len-cursor_position+1);
+ result[cursor_position] = res;
+ cursor_position++;
+ cursor_form_win++;
+ len++;
+ } else {
+ mvprintw(0, 0, "unknown key: %d\n", res);
+ }
+ break;
+ }
+ if (cursor_form_win < 0)
+ cursor_form_win = 0;
+ else if (cursor_form_win > prompt_width-1)
+ cursor_form_win = prompt_width-1;
+
+ wmove(form_win, 0, 0);
+ wclrtoeol(form_win);
+ mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
+ mvwprintw(form_win, 0, 0, "%s",
+ result + cursor_position-cursor_form_win);
+ wmove(form_win, 0, cursor_form_win);
+ touchwin(win);
+ refresh_all_windows(main_window);
+
+ if (res == 10) {
+ res = 0;
+ break;
+ } else if (res == 27 || res == KEY_F(F_BACK) ||
+ res == KEY_F(F_EXIT)) {
+ res = KEY_EXIT;
+ break;
+ } else if (res == KEY_F(F_HELP)) {
+ res = 1;
+ break;
+ }
+ }
+
+ /* hide the cursor */
+ curs_set(0);
+ del_panel(panel);
+ delwin(prompt_win);
+ delwin(form_win);
+ delwin(win);
+ return res;
+}
+
+/* refresh all windows in the correct order */
+void refresh_all_windows(WINDOW *main_window)
+{
+ update_panels();
+ touchwin(main_window);
+ refresh();
+}
+
+/* layman's scrollable window... */
+void show_scroll_win(WINDOW *main_window,
+ const char *title,
+ const char *text)
+{
+ int res;
+ int total_lines = get_line_no(text);
+ int x, y, lines, columns;
+ int start_x = 0, start_y = 0;
+ int text_lines = 0, text_cols = 0;
+ int total_cols = 0;
+ int win_cols = 0;
+ int win_lines = 0;
+ int i = 0;
+ WINDOW *win;
+ WINDOW *pad;
+ PANEL *panel;
+
+ getmaxyx(stdscr, lines, columns);
+
+ /* find the widest line of msg: */
+ total_lines = get_line_no(text);
+ for (i = 0; i < total_lines; i++) {
+ const char *line = get_line(text, i);
+ int len = get_line_length(line);
+ total_cols = max(total_cols, len+2);
+ }
+
+ /* create the pad */
+ pad = newpad(total_lines+10, total_cols+10);
+ wattrset(pad, attr_scrollwin_text);
+ fill_window(pad, text);
+
+ win_lines = min(total_lines+4, lines-2);
+ win_cols = min(total_cols+2, columns-2);
+ text_lines = max(win_lines-4, 0);
+ text_cols = max(win_cols-2, 0);
+
+ /* place window in middle of screen */
+ y = (lines-win_lines)/2;
+ x = (columns-win_cols)/2;
+
+ win = newwin(win_lines, win_cols, y, x);
+ keypad(win, TRUE);
+ /* show the help in the help window, and show the help panel */
+ wattrset(win, attr_scrollwin_box);
+ box(win, 0, 0);
+ wattrset(win, attr_scrollwin_heading);
+ mvwprintw(win, 0, 3, " %s ", title);
+ panel = new_panel(win);
+
+ /* handle scrolling */
+ do {
+
+ copywin(pad, win, start_y, start_x, 2, 2, text_lines,
+ text_cols, 0);
+ print_in_middle(win,
+ text_lines+2,
+ text_cols,
+ "<OK>",
+ attr_dialog_menu_fore);
+ wrefresh(win);
+
+ res = wgetch(win);
+ switch (res) {
+ case KEY_NPAGE:
+ case ' ':
+ case 'd':
+ start_y += text_lines-2;
+ break;
+ case KEY_PPAGE:
+ case 'u':
+ start_y -= text_lines+2;
+ break;
+ case KEY_HOME:
+ start_y = 0;
+ break;
+ case KEY_END:
+ start_y = total_lines-text_lines;
+ break;
+ case KEY_DOWN:
+ case 'j':
+ start_y++;
+ break;
+ case KEY_UP:
+ case 'k':
+ start_y--;
+ break;
+ case KEY_LEFT:
+ case 'h':
+ start_x--;
+ break;
+ case KEY_RIGHT:
+ case 'l':
+ start_x++;
+ break;
+ }
+ if (res == 10 || res == 27 || res == 'q' ||
+ res == KEY_F(F_HELP) || res == KEY_F(F_BACK) ||
+ res == KEY_F(F_EXIT))
+ break;
+ if (start_y < 0)
+ start_y = 0;
+ if (start_y >= total_lines-text_lines)
+ start_y = total_lines-text_lines;
+ if (start_x < 0)
+ start_x = 0;
+ if (start_x >= total_cols-text_cols)
+ start_x = total_cols-text_cols;
+ } while (res);
+
+ del_panel(panel);
+ delwin(win);
+ refresh_all_windows(main_window);
+}
diff --git a/backport/kconf/nconf.h b/backport/kconf/nconf.h
new file mode 100644
index 000000000000..6f925bc74eb3
--- /dev/null
+++ b/backport/kconf/nconf.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2008 Nir Tzachar <nir.tzachar@gmail.com>
+ *
+ * Derived from menuconfig.
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <ncurses.h>
+#include <menu.h>
+#include <panel.h>
+#include <form.h>
+
+#include <stdio.h>
+#include <time.h>
+#include <sys/time.h>
+
+#define max(a, b) ({\
+ typeof(a) _a = a;\
+ typeof(b) _b = b;\
+ _a > _b ? _a : _b; })
+
+#define min(a, b) ({\
+ typeof(a) _a = a;\
+ typeof(b) _b = b;\
+ _a < _b ? _a : _b; })
+
+extern int attr_normal;
+extern int attr_main_heading;
+extern int attr_main_menu_box;
+extern int attr_main_menu_fore;
+extern int attr_main_menu_back;
+extern int attr_main_menu_grey;
+extern int attr_main_menu_heading;
+extern int attr_scrollwin_text;
+extern int attr_scrollwin_heading;
+extern int attr_scrollwin_box;
+extern int attr_dialog_text;
+extern int attr_dialog_menu_fore;
+extern int attr_dialog_menu_back;
+extern int attr_dialog_box;
+extern int attr_input_box;
+extern int attr_input_heading;
+extern int attr_input_text;
+extern int attr_input_field;
+extern int attr_function_text;
+extern int attr_function_highlight;
+
+typedef enum {
+ F_HELP = 1,
+ F_SYMBOL = 2,
+ F_INSTS = 3,
+ F_CONF = 4,
+ F_BACK = 5,
+ F_SAVE = 6,
+ F_LOAD = 7,
+ F_SEARCH = 8,
+ F_EXIT = 9,
+} function_key;
+
+void set_colors(void);
+
+/* this changes the windows attributes !!! */
+void print_in_middle(WINDOW *win, int y, int width, const char *str, int attrs);
+int get_line_length(const char *line);
+int get_line_no(const char *text);
+const char *get_line(const char *text, int line_no);
+void fill_window(WINDOW *win, const char *text);
+int btn_dialog(WINDOW *main_window, const char *msg, int btn_num, ...);
+int dialog_inputbox(WINDOW *main_window,
+ const char *title, const char *prompt,
+ const char *init, char **resultp, int *result_len);
+void refresh_all_windows(WINDOW *main_window);
+void show_scroll_win(WINDOW *main_window,
+ const char *title,
+ const char *text);
diff --git a/backport/kconf/parser.y b/backport/kconf/parser.y
new file mode 100644
index 000000000000..2af7ce4e1531
--- /dev/null
+++ b/backport/kconf/parser.y
@@ -0,0 +1,716 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ */
+%{
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+#include "lkc.h"
+#include "internal.h"
+
+#define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)
+
+#define PRINTD 0x0001
+#define DEBUG_PARSE 0x0002
+
+int cdebug = PRINTD;
+
+static void yyerror(const char *err);
+static void zconfprint(const char *err, ...);
+static void zconf_error(const char *err, ...);
+static bool zconf_endtoken(const char *tokenname,
+ const char *expected_tokenname);
+
+struct symbol *symbol_hash[SYMBOL_HASHSIZE];
+
+struct menu *current_menu, *current_entry;
+
+%}
+
+%union
+{
+ char *string;
+ struct symbol *symbol;
+ struct expr *expr;
+ struct menu *menu;
+ enum symbol_type type;
+ enum variable_flavor flavor;
+}
+
+%token <string> T_HELPTEXT
+%token <string> T_WORD
+%token <string> T_WORD_QUOTE
+%token T_BOOL
+%token T_CHOICE
+%token T_CLOSE_PAREN
+%token T_COLON_EQUAL
+%token T_COMMENT
+%token T_CONFIG
+%token T_DEFAULT
+%token T_DEF_BOOL
+%token T_DEF_TRISTATE
+%token T_DEPENDS
+%token T_ENDCHOICE
+%token T_ENDIF
+%token T_ENDMENU
+%token T_HELP
+%token T_HEX
+%token T_IF
+%token T_IMPLY
+%token T_INT
+%token T_MAINMENU
+%token T_MENU
+%token T_MENUCONFIG
+%token T_MODULES
+%token T_ON
+%token T_OPEN_PAREN
+%token T_OPTIONAL
+%token T_PLUS_EQUAL
+%token T_PROMPT
+%token T_RANGE
+%token T_SELECT
+%token T_SOURCE
+%token T_STRING
+%token T_TRISTATE
+%token T_VISIBLE
+%token T_EOL
+%token <string> T_ASSIGN_VAL
+
+%left T_OR
+%left T_AND
+%left T_EQUAL T_UNEQUAL
+%left T_LESS T_LESS_EQUAL T_GREATER T_GREATER_EQUAL
+%nonassoc T_NOT
+
+%type <symbol> nonconst_symbol
+%type <symbol> symbol
+%type <type> type logic_type default
+%type <expr> expr
+%type <expr> if_expr
+%type <string> end
+%type <menu> if_entry menu_entry choice_entry
+%type <string> word_opt assign_val
+%type <flavor> assign_op
+
+%destructor {
+ fprintf(stderr, "%s:%d: missing end statement for this entry\n",
+ $$->file->name, $$->lineno);
+ if (current_menu == $$)
+ menu_end_menu();
+} if_entry menu_entry choice_entry
+
+%%
+input: mainmenu_stmt stmt_list | stmt_list;
+
+/* mainmenu entry */
+
+mainmenu_stmt: T_MAINMENU T_WORD_QUOTE T_EOL
+{
+ menu_add_prompt(P_MENU, $2, NULL);
+};
+
+stmt_list:
+ /* empty */
+ | stmt_list assignment_stmt
+ | stmt_list choice_stmt
+ | stmt_list comment_stmt
+ | stmt_list config_stmt
+ | stmt_list if_stmt
+ | stmt_list menu_stmt
+ | stmt_list menuconfig_stmt
+ | stmt_list source_stmt
+ | stmt_list T_WORD error T_EOL { zconf_error("unknown statement \"%s\"", $2); }
+ | stmt_list error T_EOL { zconf_error("invalid statement"); }
+;
+
+stmt_list_in_choice:
+ /* empty */
+ | stmt_list_in_choice comment_stmt
+ | stmt_list_in_choice config_stmt
+ | stmt_list_in_choice if_stmt_in_choice
+ | stmt_list_in_choice error T_EOL { zconf_error("invalid statement"); }
+;
+
+/* config/menuconfig entry */
+
+config_entry_start: T_CONFIG nonconst_symbol T_EOL
+{
+ $2->flags |= SYMBOL_OPTIONAL;
+ menu_add_entry($2);
+ printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), $2->name);
+};
+
+config_stmt: config_entry_start config_option_list
+{
+ printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
+};
+
+menuconfig_entry_start: T_MENUCONFIG nonconst_symbol T_EOL
+{
+ $2->flags |= SYMBOL_OPTIONAL;
+ menu_add_entry($2);
+ printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), $2->name);
+};
+
+menuconfig_stmt: menuconfig_entry_start config_option_list
+{
+ if (current_entry->prompt)
+ current_entry->prompt->type = P_MENU;
+ else
+ zconfprint("warning: menuconfig statement without prompt");
+ printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
+};
+
+config_option_list:
+ /* empty */
+ | config_option_list config_option
+ | config_option_list depends
+ | config_option_list help
+;
+
+config_option: type prompt_stmt_opt T_EOL
+{
+ menu_set_type($1);
+ printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
+ zconf_curname(), zconf_lineno(),
+ $1);
+};
+
+config_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL
+{
+ menu_add_prompt(P_PROMPT, $2, $3);
+ printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
+};
+
+config_option: default expr if_expr T_EOL
+{
+ menu_add_expr(P_DEFAULT, $2, $3);
+ if ($1 != S_UNKNOWN)
+ menu_set_type($1);
+ printd(DEBUG_PARSE, "%s:%d:default(%u)\n",
+ zconf_curname(), zconf_lineno(),
+ $1);
+};
+
+config_option: T_SELECT nonconst_symbol if_expr T_EOL
+{
+ menu_add_symbol(P_SELECT, $2, $3);
+ printd(DEBUG_PARSE, "%s:%d:select\n", zconf_curname(), zconf_lineno());
+};
+
+config_option: T_IMPLY nonconst_symbol if_expr T_EOL
+{
+ menu_add_symbol(P_IMPLY, $2, $3);
+ printd(DEBUG_PARSE, "%s:%d:imply\n", zconf_curname(), zconf_lineno());
+};
+
+config_option: T_RANGE symbol symbol if_expr T_EOL
+{
+ menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4);
+ printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
+};
+
+config_option: T_MODULES T_EOL
+{
+ if (modules_sym)
+ zconf_error("symbol '%s' redefines option 'modules' already defined by symbol '%s'",
+ current_entry->sym->name, modules_sym->name);
+ modules_sym = current_entry->sym;
+};
+
+/* choice entry */
+
+choice: T_CHOICE word_opt T_EOL
+{
+ struct symbol *sym = sym_lookup($2, SYMBOL_CHOICE);
+ sym->flags |= SYMBOL_NO_WRITE;
+ menu_add_entry(sym);
+ menu_add_expr(P_CHOICE, NULL, NULL);
+ free($2);
+ printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
+};
+
+choice_entry: choice choice_option_list
+{
+ $$ = menu_add_menu();
+};
+
+choice_end: end
+{
+ if (zconf_endtoken($1, "choice")) {
+ menu_end_menu();
+ printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());
+ }
+};
+
+choice_stmt: choice_entry stmt_list_in_choice choice_end
+;
+
+choice_option_list:
+ /* empty */
+ | choice_option_list choice_option
+ | choice_option_list depends
+ | choice_option_list help
+;
+
+choice_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL
+{
+ menu_add_prompt(P_PROMPT, $2, $3);
+ printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
+};
+
+choice_option: logic_type prompt_stmt_opt T_EOL
+{
+ menu_set_type($1);
+ printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
+ zconf_curname(), zconf_lineno(), $1);
+};
+
+choice_option: T_OPTIONAL T_EOL
+{
+ current_entry->sym->flags |= SYMBOL_OPTIONAL;
+ printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), zconf_lineno());
+};
+
+choice_option: T_DEFAULT nonconst_symbol if_expr T_EOL
+{
+ menu_add_symbol(P_DEFAULT, $2, $3);
+ printd(DEBUG_PARSE, "%s:%d:default\n",
+ zconf_curname(), zconf_lineno());
+};
+
+type:
+ logic_type
+ | T_INT { $$ = S_INT; }
+ | T_HEX { $$ = S_HEX; }
+ | T_STRING { $$ = S_STRING; }
+
+logic_type:
+ T_BOOL { $$ = S_BOOLEAN; }
+ | T_TRISTATE { $$ = S_TRISTATE; }
+
+default:
+ T_DEFAULT { $$ = S_UNKNOWN; }
+ | T_DEF_BOOL { $$ = S_BOOLEAN; }
+ | T_DEF_TRISTATE { $$ = S_TRISTATE; }
+
+/* if entry */
+
+if_entry: T_IF expr T_EOL
+{
+ printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
+ menu_add_entry(NULL);
+ menu_add_dep($2);
+ $$ = menu_add_menu();
+};
+
+if_end: end
+{
+ if (zconf_endtoken($1, "if")) {
+ menu_end_menu();
+ printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());
+ }
+};
+
+if_stmt: if_entry stmt_list if_end
+;
+
+if_stmt_in_choice: if_entry stmt_list_in_choice if_end
+;
+
+/* menu entry */
+
+menu: T_MENU T_WORD_QUOTE T_EOL
+{
+ menu_add_entry(NULL);
+ menu_add_prompt(P_MENU, $2, NULL);
+ printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
+};
+
+menu_entry: menu menu_option_list
+{
+ $$ = menu_add_menu();
+};
+
+menu_end: end
+{
+ if (zconf_endtoken($1, "menu")) {
+ menu_end_menu();
+ printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno());
+ }
+};
+
+menu_stmt: menu_entry stmt_list menu_end
+;
+
+menu_option_list:
+ /* empty */
+ | menu_option_list visible
+ | menu_option_list depends
+;
+
+source_stmt: T_SOURCE T_WORD_QUOTE T_EOL
+{
+ printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
+ zconf_nextfile($2);
+ free($2);
+};
+
+/* comment entry */
+
+comment: T_COMMENT T_WORD_QUOTE T_EOL
+{
+ menu_add_entry(NULL);
+ menu_add_prompt(P_COMMENT, $2, NULL);
+ printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
+};
+
+comment_stmt: comment comment_option_list
+;
+
+comment_option_list:
+ /* empty */
+ | comment_option_list depends
+;
+
+/* help option */
+
+help_start: T_HELP T_EOL
+{
+ printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
+ zconf_starthelp();
+};
+
+help: help_start T_HELPTEXT
+{
+ if (current_entry->help) {
+ free(current_entry->help);
+ zconfprint("warning: '%s' defined with more than one help text -- only the last one will be used",
+ current_entry->sym->name ?: "<choice>");
+ }
+
+ /* Is the help text empty or all whitespace? */
+ if ($2[strspn($2, " \f\n\r\t\v")] == '\0')
+ zconfprint("warning: '%s' defined with blank help text",
+ current_entry->sym->name ?: "<choice>");
+
+ current_entry->help = $2;
+};
+
+/* depends option */
+
+depends: T_DEPENDS T_ON expr T_EOL
+{
+ menu_add_dep($3);
+ printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());
+};
+
+/* visibility option */
+visible: T_VISIBLE if_expr T_EOL
+{
+ menu_add_visibility($2);
+};
+
+/* prompt statement */
+
+prompt_stmt_opt:
+ /* empty */
+ | T_WORD_QUOTE if_expr
+{
+ menu_add_prompt(P_PROMPT, $1, $2);
+};
+
+end: T_ENDMENU T_EOL { $$ = "menu"; }
+ | T_ENDCHOICE T_EOL { $$ = "choice"; }
+ | T_ENDIF T_EOL { $$ = "if"; }
+;
+
+if_expr: /* empty */ { $$ = NULL; }
+ | T_IF expr { $$ = $2; }
+;
+
+expr: symbol { $$ = expr_alloc_symbol($1); }
+ | symbol T_LESS symbol { $$ = expr_alloc_comp(E_LTH, $1, $3); }
+ | symbol T_LESS_EQUAL symbol { $$ = expr_alloc_comp(E_LEQ, $1, $3); }
+ | symbol T_GREATER symbol { $$ = expr_alloc_comp(E_GTH, $1, $3); }
+ | symbol T_GREATER_EQUAL symbol { $$ = expr_alloc_comp(E_GEQ, $1, $3); }
+ | symbol T_EQUAL symbol { $$ = expr_alloc_comp(E_EQUAL, $1, $3); }
+ | symbol T_UNEQUAL symbol { $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); }
+ | T_OPEN_PAREN expr T_CLOSE_PAREN { $$ = $2; }
+ | T_NOT expr { $$ = expr_alloc_one(E_NOT, $2); }
+ | expr T_OR expr { $$ = expr_alloc_two(E_OR, $1, $3); }
+ | expr T_AND expr { $$ = expr_alloc_two(E_AND, $1, $3); }
+;
+
+/* For symbol definitions, selects, etc., where quotes are not accepted */
+nonconst_symbol: T_WORD { $$ = sym_lookup($1, 0); free($1); };
+
+symbol: nonconst_symbol
+ | T_WORD_QUOTE { $$ = sym_lookup($1, SYMBOL_CONST); free($1); }
+;
+
+word_opt: /* empty */ { $$ = NULL; }
+ | T_WORD
+
+/* assignment statement */
+
+assignment_stmt: T_WORD assign_op assign_val T_EOL { variable_add($1, $3, $2); free($1); free($3); }
+
+assign_op:
+ T_EQUAL { $$ = VAR_RECURSIVE; }
+ | T_COLON_EQUAL { $$ = VAR_SIMPLE; }
+ | T_PLUS_EQUAL { $$ = VAR_APPEND; }
+;
+
+assign_val:
+ /* empty */ { $$ = xstrdup(""); };
+ | T_ASSIGN_VAL
+;
+
+%%
+
+void conf_parse(const char *name)
+{
+ struct symbol *sym;
+ int i;
+
+ zconf_initscan(name);
+
+ _menu_init();
+
+ if (getenv("ZCONF_DEBUG"))
+ yydebug = 1;
+ yyparse();
+
+ /* Variables are expanded in the parse phase. We can free them here. */
+ variable_all_del();
+
+ if (yynerrs)
+ exit(1);
+ if (!modules_sym)
+ modules_sym = sym_find( "n" );
+
+ if (!menu_has_prompt(&rootmenu)) {
+ current_entry = &rootmenu;
+ menu_add_prompt(P_MENU, "Main menu", NULL);
+ }
+
+ menu_finalize(&rootmenu);
+ for_all_symbols(i, sym) {
+ if (sym_check_deps(sym))
+ yynerrs++;
+ }
+ if (yynerrs)
+ exit(1);
+ conf_set_changed(true);
+}
+
+static bool zconf_endtoken(const char *tokenname,
+ const char *expected_tokenname)
+{
+ if (strcmp(tokenname, expected_tokenname)) {
+ zconf_error("unexpected '%s' within %s block",
+ tokenname, expected_tokenname);
+ yynerrs++;
+ return false;
+ }
+ if (current_menu->file != current_file) {
+ zconf_error("'%s' in different file than '%s'",
+ tokenname, expected_tokenname);
+ fprintf(stderr, "%s:%d: location of the '%s'\n",
+ current_menu->file->name, current_menu->lineno,
+ expected_tokenname);
+ yynerrs++;
+ return false;
+ }
+ return true;
+}
+
+static void zconfprint(const char *err, ...)
+{
+ va_list ap;
+
+ fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
+ va_start(ap, err);
+ vfprintf(stderr, err, ap);
+ va_end(ap);
+ fprintf(stderr, "\n");
+}
+
+static void zconf_error(const char *err, ...)
+{
+ va_list ap;
+
+ yynerrs++;
+ fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
+ va_start(ap, err);
+ vfprintf(stderr, err, ap);
+ va_end(ap);
+ fprintf(stderr, "\n");
+}
+
+static void yyerror(const char *err)
+{
+ fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, err);
+}
+
+static void print_quoted_string(FILE *out, const char *str)
+{
+ const char *p;
+ int len;
+
+ putc('"', out);
+ while ((p = strchr(str, '"'))) {
+ len = p - str;
+ if (len)
+ fprintf(out, "%.*s", len, str);
+ fputs("\\\"", out);
+ str = p + 1;
+ }
+ fputs(str, out);
+ putc('"', out);
+}
+
+static void print_symbol(FILE *out, struct menu *menu)
+{
+ struct symbol *sym = menu->sym;
+ struct property *prop;
+
+ if (sym_is_choice(sym))
+ fprintf(out, "\nchoice\n");
+ else
+ fprintf(out, "\nconfig %s\n", sym->name);
+ switch (sym->type) {
+ case S_BOOLEAN:
+ fputs(" bool\n", out);
+ break;
+ case S_TRISTATE:
+ fputs(" tristate\n", out);
+ break;
+ case S_STRING:
+ fputs(" string\n", out);
+ break;
+ case S_INT:
+ fputs(" integer\n", out);
+ break;
+ case S_HEX:
+ fputs(" hex\n", out);
+ break;
+ default:
+ fputs(" ???\n", out);
+ break;
+ }
+ for (prop = sym->prop; prop; prop = prop->next) {
+ if (prop->menu != menu)
+ continue;
+ switch (prop->type) {
+ case P_PROMPT:
+ fputs(" prompt ", out);
+ print_quoted_string(out, prop->text);
+ if (!expr_is_yes(prop->visible.expr)) {
+ fputs(" if ", out);
+ expr_fprint(prop->visible.expr, out);
+ }
+ fputc('\n', out);
+ break;
+ case P_DEFAULT:
+ fputs( " default ", out);
+ expr_fprint(prop->expr, out);
+ if (!expr_is_yes(prop->visible.expr)) {
+ fputs(" if ", out);
+ expr_fprint(prop->visible.expr, out);
+ }
+ fputc('\n', out);
+ break;
+ case P_CHOICE:
+ fputs(" #choice value\n", out);
+ break;
+ case P_SELECT:
+ fputs( " select ", out);
+ expr_fprint(prop->expr, out);
+ fputc('\n', out);
+ break;
+ case P_IMPLY:
+ fputs( " imply ", out);
+ expr_fprint(prop->expr, out);
+ fputc('\n', out);
+ break;
+ case P_RANGE:
+ fputs( " range ", out);
+ expr_fprint(prop->expr, out);
+ fputc('\n', out);
+ break;
+ case P_MENU:
+ fputs( " menu ", out);
+ print_quoted_string(out, prop->text);
+ fputc('\n', out);
+ break;
+ case P_SYMBOL:
+ fputs( " symbol ", out);
+ fprintf(out, "%s\n", prop->menu->sym->name);
+ break;
+ default:
+ fprintf(out, " unknown prop %d!\n", prop->type);
+ break;
+ }
+ }
+ if (menu->help) {
+ int len = strlen(menu->help);
+ while (menu->help[--len] == '\n')
+ menu->help[len] = 0;
+ fprintf(out, " help\n%s\n", menu->help);
+ }
+}
+
+void zconfdump(FILE *out)
+{
+ struct property *prop;
+ struct symbol *sym;
+ struct menu *menu;
+
+ menu = rootmenu.list;
+ while (menu) {
+ if ((sym = menu->sym))
+ print_symbol(out, menu);
+ else if ((prop = menu->prompt)) {
+ switch (prop->type) {
+ case P_COMMENT:
+ fputs("\ncomment ", out);
+ print_quoted_string(out, prop->text);
+ fputs("\n", out);
+ break;
+ case P_MENU:
+ fputs("\nmenu ", out);
+ print_quoted_string(out, prop->text);
+ fputs("\n", out);
+ break;
+ default:
+ ;
+ }
+ if (!expr_is_yes(prop->visible.expr)) {
+ fputs(" depends ", out);
+ expr_fprint(prop->visible.expr, out);
+ fputc('\n', out);
+ }
+ }
+
+ if (menu->list)
+ menu = menu->list;
+ else if (menu->next)
+ menu = menu->next;
+ else while ((menu = menu->parent)) {
+ if (menu->prompt && menu->prompt->type == P_MENU)
+ fputs("\nendmenu\n", out);
+ if (menu->next) {
+ menu = menu->next;
+ break;
+ }
+ }
+ }
+}
diff --git a/backport/kconf/preprocess.c b/backport/kconf/preprocess.c
new file mode 100644
index 000000000000..0590f86df6e4
--- /dev/null
+++ b/backport/kconf/preprocess.c
@@ -0,0 +1,574 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2018 Masahiro Yamada <yamada.masahiro@socionext.com>
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "list.h"
+#include "lkc.h"
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+static char *expand_string_with_args(const char *in, int argc, char *argv[]);
+static char *expand_string(const char *in);
+
+static void __attribute__((noreturn)) pperror(const char *format, ...)
+{
+ va_list ap;
+
+ fprintf(stderr, "%s:%d: ", current_file->name, yylineno);
+ va_start(ap, format);
+ vfprintf(stderr, format, ap);
+ va_end(ap);
+ fprintf(stderr, "\n");
+
+ exit(1);
+}
+
+/*
+ * Environment variables
+ */
+static LIST_HEAD(env_list);
+
+struct env {
+ char *name;
+ char *value;
+ struct list_head node;
+};
+
+static void env_add(const char *name, const char *value)
+{
+ struct env *e;
+
+ e = xmalloc(sizeof(*e));
+ e->name = xstrdup(name);
+ e->value = xstrdup(value);
+
+ list_add_tail(&e->node, &env_list);
+}
+
+static void env_del(struct env *e)
+{
+ list_del(&e->node);
+ free(e->name);
+ free(e->value);
+ free(e);
+}
+
+/* The returned pointer must be freed when done */
+static char *env_expand(const char *name)
+{
+ struct env *e;
+ const char *value;
+
+ if (!*name)
+ return NULL;
+
+ list_for_each_entry(e, &env_list, node) {
+ if (!strcmp(name, e->name))
+ return xstrdup(e->value);
+ }
+
+ value = getenv(name);
+ if (!value)
+ return NULL;
+
+ /*
+ * We need to remember all referenced environment variables.
+ * They will be written out to include/config/auto.conf.cmd
+ */
+ env_add(name, value);
+
+ return xstrdup(value);
+}
+
+void env_write_dep(FILE *f, const char *autoconfig_name)
+{
+ struct env *e, *tmp;
+
+ list_for_each_entry_safe(e, tmp, &env_list, node) {
+ fprintf(f, "ifneq \"$(%s)\" \"%s\"\n", e->name, e->value);
+ fprintf(f, "%s: FORCE\n", autoconfig_name);
+ fprintf(f, "endif\n");
+ env_del(e);
+ }
+}
+
+/*
+ * Built-in functions
+ */
+struct function {
+ const char *name;
+ unsigned int min_args;
+ unsigned int max_args;
+ char *(*func)(int argc, char *argv[]);
+};
+
+static char *do_error_if(int argc, char *argv[])
+{
+ if (!strcmp(argv[0], "y"))
+ pperror("%s", argv[1]);
+
+ return xstrdup("");
+}
+
+static char *do_filename(int argc, char *argv[])
+{
+ return xstrdup(current_file->name);
+}
+
+static char *do_info(int argc, char *argv[])
+{
+ printf("%s\n", argv[0]);
+
+ return xstrdup("");
+}
+
+static char *do_lineno(int argc, char *argv[])
+{
+ char buf[16];
+
+ sprintf(buf, "%d", yylineno);
+
+ return xstrdup(buf);
+}
+
+static char *do_shell(int argc, char *argv[])
+{
+ FILE *p;
+ char buf[256];
+ char *cmd;
+ size_t nread;
+ int i;
+
+ cmd = argv[0];
+
+ p = popen(cmd, "r");
+ if (!p) {
+ perror(cmd);
+ exit(1);
+ }
+
+ nread = fread(buf, 1, sizeof(buf), p);
+ if (nread == sizeof(buf))
+ nread--;
+
+ /* remove trailing new lines */
+ while (nread > 0 && buf[nread - 1] == '\n')
+ nread--;
+
+ buf[nread] = 0;
+
+ /* replace a new line with a space */
+ for (i = 0; i < nread; i++) {
+ if (buf[i] == '\n')
+ buf[i] = ' ';
+ }
+
+ if (pclose(p) == -1) {
+ perror(cmd);
+ exit(1);
+ }
+
+ return xstrdup(buf);
+}
+
+static char *do_warning_if(int argc, char *argv[])
+{
+ if (!strcmp(argv[0], "y"))
+ fprintf(stderr, "%s:%d: %s\n",
+ current_file->name, yylineno, argv[1]);
+
+ return xstrdup("");
+}
+
+static const struct function function_table[] = {
+ /* Name MIN MAX Function */
+ { "error-if", 2, 2, do_error_if },
+ { "filename", 0, 0, do_filename },
+ { "info", 1, 1, do_info },
+ { "lineno", 0, 0, do_lineno },
+ { "shell", 1, 1, do_shell },
+ { "warning-if", 2, 2, do_warning_if },
+};
+
+#define FUNCTION_MAX_ARGS 16
+
+static char *function_expand(const char *name, int argc, char *argv[])
+{
+ const struct function *f;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(function_table); i++) {
+ f = &function_table[i];
+ if (strcmp(f->name, name))
+ continue;
+
+ if (argc < f->min_args)
+ pperror("too few function arguments passed to '%s'",
+ name);
+
+ if (argc > f->max_args)
+ pperror("too many function arguments passed to '%s'",
+ name);
+
+ return f->func(argc, argv);
+ }
+
+ return NULL;
+}
+
+/*
+ * Variables (and user-defined functions)
+ */
+static LIST_HEAD(variable_list);
+
+struct variable {
+ char *name;
+ char *value;
+ enum variable_flavor flavor;
+ int exp_count;
+ struct list_head node;
+};
+
+static struct variable *variable_lookup(const char *name)
+{
+ struct variable *v;
+
+ list_for_each_entry(v, &variable_list, node) {
+ if (!strcmp(name, v->name))
+ return v;
+ }
+
+ return NULL;
+}
+
+static char *variable_expand(const char *name, int argc, char *argv[])
+{
+ struct variable *v;
+ char *res;
+
+ v = variable_lookup(name);
+ if (!v)
+ return NULL;
+
+ if (argc == 0 && v->exp_count)
+ pperror("Recursive variable '%s' references itself (eventually)",
+ name);
+
+ if (v->exp_count > 1000)
+ pperror("Too deep recursive expansion");
+
+ v->exp_count++;
+
+ if (v->flavor == VAR_RECURSIVE)
+ res = expand_string_with_args(v->value, argc, argv);
+ else
+ res = xstrdup(v->value);
+
+ v->exp_count--;
+
+ return res;
+}
+
+void variable_add(const char *name, const char *value,
+ enum variable_flavor flavor)
+{
+ struct variable *v;
+ char *new_value;
+ bool append = false;
+
+ v = variable_lookup(name);
+ if (v) {
+ /* For defined variables, += inherits the existing flavor */
+ if (flavor == VAR_APPEND) {
+ flavor = v->flavor;
+ append = true;
+ } else {
+ free(v->value);
+ }
+ } else {
+ /* For undefined variables, += assumes the recursive flavor */
+ if (flavor == VAR_APPEND)
+ flavor = VAR_RECURSIVE;
+
+ v = xmalloc(sizeof(*v));
+ v->name = xstrdup(name);
+ v->exp_count = 0;
+ list_add_tail(&v->node, &variable_list);
+ }
+
+ v->flavor = flavor;
+
+ if (flavor == VAR_SIMPLE)
+ new_value = expand_string(value);
+ else
+ new_value = xstrdup(value);
+
+ if (append) {
+ v->value = xrealloc(v->value,
+ strlen(v->value) + strlen(new_value) + 2);
+ strcat(v->value, " ");
+ strcat(v->value, new_value);
+ free(new_value);
+ } else {
+ v->value = new_value;
+ }
+}
+
+static void variable_del(struct variable *v)
+{
+ list_del(&v->node);
+ free(v->name);
+ free(v->value);
+ free(v);
+}
+
+void variable_all_del(void)
+{
+ struct variable *v, *tmp;
+
+ list_for_each_entry_safe(v, tmp, &variable_list, node)
+ variable_del(v);
+}
+
+/*
+ * Evaluate a clause with arguments. argc/argv are arguments from the upper
+ * function call.
+ *
+ * Returned string must be freed when done
+ */
+static char *eval_clause(const char *str, size_t len, int argc, char *argv[])
+{
+ char *tmp, *name, *res, *endptr, *prev, *p;
+ int new_argc = 0;
+ char *new_argv[FUNCTION_MAX_ARGS];
+ int nest = 0;
+ int i;
+ unsigned long n;
+
+ tmp = xstrndup(str, len);
+
+ /*
+ * If variable name is '1', '2', etc. It is generally an argument
+ * from a user-function call (i.e. local-scope variable). If not
+ * available, then look-up global-scope variables.
+ */
+ n = strtoul(tmp, &endptr, 10);
+ if (!*endptr && n > 0 && n <= argc) {
+ res = xstrdup(argv[n - 1]);
+ goto free_tmp;
+ }
+
+ prev = p = tmp;
+
+ /*
+ * Split into tokens
+ * The function name and arguments are separated by a comma.
+ * For example, if the function call is like this:
+ * $(foo,$(x),$(y))
+ *
+ * The input string for this helper should be:
+ * foo,$(x),$(y)
+ *
+ * and split into:
+ * new_argv[0] = 'foo'
+ * new_argv[1] = '$(x)'
+ * new_argv[2] = '$(y)'
+ */
+ while (*p) {
+ if (nest == 0 && *p == ',') {
+ *p = 0;
+ if (new_argc >= FUNCTION_MAX_ARGS)
+ pperror("too many function arguments");
+ new_argv[new_argc++] = prev;
+ prev = p + 1;
+ } else if (*p == '(') {
+ nest++;
+ } else if (*p == ')') {
+ nest--;
+ }
+
+ p++;
+ }
+ new_argv[new_argc++] = prev;
+
+ /*
+ * Shift arguments
+ * new_argv[0] represents a function name or a variable name. Put it
+ * into 'name', then shift the rest of the arguments. This simplifies
+ * 'const' handling.
+ */
+ name = expand_string_with_args(new_argv[0], argc, argv);
+ new_argc--;
+ for (i = 0; i < new_argc; i++)
+ new_argv[i] = expand_string_with_args(new_argv[i + 1],
+ argc, argv);
+
+ /* Search for variables */
+ res = variable_expand(name, new_argc, new_argv);
+ if (res)
+ goto free;
+
+ /* Look for built-in functions */
+ res = function_expand(name, new_argc, new_argv);
+ if (res)
+ goto free;
+
+ /* Last, try environment variable */
+ if (new_argc == 0) {
+ res = env_expand(name);
+ if (res)
+ goto free;
+ }
+
+ res = xstrdup("");
+free:
+ for (i = 0; i < new_argc; i++)
+ free(new_argv[i]);
+ free(name);
+free_tmp:
+ free(tmp);
+
+ return res;
+}
+
+/*
+ * Expand a string that follows '$'
+ *
+ * For example, if the input string is
+ * ($(FOO)$($(BAR)))$(BAZ)
+ * this helper evaluates
+ * $($(FOO)$($(BAR)))
+ * and returns a new string containing the expansion (note that the string is
+ * recursively expanded), also advancing 'str' to point to the next character
+ * after the corresponding closing parenthesis, in this case, *str will be
+ * $(BAR)
+ */
+static char *expand_dollar_with_args(const char **str, int argc, char *argv[])
+{
+ const char *p = *str;
+ const char *q;
+ int nest = 0;
+
+ /*
+ * In Kconfig, variable/function references always start with "$(".
+ * Neither single-letter variables as in $A nor curly braces as in ${CC}
+ * are supported. '$' not followed by '(' loses its special meaning.
+ */
+ if (*p != '(') {
+ *str = p;
+ return xstrdup("$");
+ }
+
+ p++;
+ q = p;
+ while (*q) {
+ if (*q == '(') {
+ nest++;
+ } else if (*q == ')') {
+ if (nest-- == 0)
+ break;
+ }
+ q++;
+ }
+
+ if (!*q)
+ pperror("unterminated reference to '%s': missing ')'", p);
+
+ /* Advance 'str' to after the expanded initial portion of the string */
+ *str = q + 1;
+
+ return eval_clause(p, q - p, argc, argv);
+}
+
+char *expand_dollar(const char **str)
+{
+ return expand_dollar_with_args(str, 0, NULL);
+}
+
+static char *__expand_string(const char **str, bool (*is_end)(char c),
+ int argc, char *argv[])
+{
+ const char *in, *p;
+ char *expansion, *out;
+ size_t in_len, out_len;
+
+ out = xmalloc(1);
+ *out = 0;
+ out_len = 1;
+
+ p = in = *str;
+
+ while (1) {
+ if (*p == '$') {
+ in_len = p - in;
+ p++;
+ expansion = expand_dollar_with_args(&p, argc, argv);
+ out_len += in_len + strlen(expansion);
+ out = xrealloc(out, out_len);
+ strncat(out, in, in_len);
+ strcat(out, expansion);
+ free(expansion);
+ in = p;
+ continue;
+ }
+
+ if (is_end(*p))
+ break;
+
+ p++;
+ }
+
+ in_len = p - in;
+ out_len += in_len;
+ out = xrealloc(out, out_len);
+ strncat(out, in, in_len);
+
+ /* Advance 'str' to the end character */
+ *str = p;
+
+ return out;
+}
+
+static bool is_end_of_str(char c)
+{
+ return !c;
+}
+
+/*
+ * Expand variables and functions in the given string. Undefined variables
+ * expand to an empty string.
+ * The returned string must be freed when done.
+ */
+static char *expand_string_with_args(const char *in, int argc, char *argv[])
+{
+ return __expand_string(&in, is_end_of_str, argc, argv);
+}
+
+static char *expand_string(const char *in)
+{
+ return expand_string_with_args(in, 0, NULL);
+}
+
+static bool is_end_of_token(char c)
+{
+ return !(isalnum(c) || c == '_' || c == '-');
+}
+
+/*
+ * Expand variables in a token. The parsing stops when a token separater
+ * (in most cases, it is a whitespace) is encountered. 'str' is updated to
+ * point to the next character.
+ *
+ * The returned string must be freed when done.
+ */
+char *expand_one_token(const char **str)
+{
+ return __expand_string(str, is_end_of_token, 0, NULL);
+}
diff --git a/backport/kconf/setlocalversion b/backport/kconf/setlocalversion
new file mode 100755
index 000000000000..097b9423bc50
--- /dev/null
+++ b/backport/kconf/setlocalversion
@@ -0,0 +1,118 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2005-2006 Ryan Anderson <ryan@michonline.com>
+# Copyright (c) 2006 Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
+# Copyright (c) 2006 Uwe Zeisberger <zeisberg@informatik.uni-freiburg.de>
+# Copyright (c) 2007 Aron Griffis <aron@hp.com>
+# Copyright (c) 2007 Theodore Ts'o <tytso@mit.edu>
+# Copyright (c) 2008 Bryan Wu <bryan.wu@analog.com>
+# Copyright (c) 2008 Mike Frysinger <vapier@gentoo.org>
+# Copyright (c) 2008 Peter Korsgaard <jacmet@sunsite.dk>
+# Copyright (c) 2008 Sebastian Siewior <lkml@ml.breakpoint.cc>
+# Copyright (c) 2008 Trent Piepho <tpiepho@freescale.com>
+# Copyright (c) 2009 Mike Frysinger <vapier.adi@gmail.com>
+# Copyright (c) 2009 Nico Schottelius <nico-linuxsetlocalversion@schottelius.org>
+# Copyright (c) 2009 Peter Korsgaard <jacmet@sunsite.dk>
+# Copyright (c) 2010 Linus Torvalds <torvalds@linux-foundation.org>
+# Copyright (c) 2010 Michael Prokop <mika@grml.org>
+# Copyright (c) 2010 Michał Górny <gentoo@mgorny.alt.pl>
+# Copyright (c) 2010 Michal Marek <mmarek@suse.cz>
+# Copyright (c) 2010 Milton Miller <miltonm@bga.com>
+# Copyright (c) 2011 Mike Crowe <mcrowe@zipitwireless.com>
+# Copyright (c) 2012 Roland Dreier <roland@purestorage.com>
+# Copyright (c) 2013 Christian Kujau <lists@nerdbynature.de>
+# Copyright (c) 2013 Christophe Leroy <christophe.leroy@c-s.fr>
+# Copyright (c) 2013 Franck Bui-Huu <fbuihuu@gmail.com>
+# Copyright (c) 2015 Luis R. Rodriguez <mcgrof@do-not-panic.com>
+#
+# This file is released under the GPLv2.
+#
+# Taken from the Linux kernel as of v4.2-rc2 with a few modifications
+# described below.
+#
+# This scripts adds local version information from the version
+# control systems. It was taken from the Linux kernel as of v4.2-rc2
+# and simplified for use on Coccinelle by mcgrof. The version info
+# was hard coded to use long version. The svn postfix details were
+# also removed. I also added the option to enable this script to
+# work well for trees that do not use PGP signed tags or annotated
+# tags (git tag -s or git tag -a), git describe by default will only
+# look for these tags. If you do not use these you will want to set
+# the below variable to TAGS="--tags". If you requires --tags, consider
+# to start signing your releases "git tag -s" and use a subkey for that.
+# If you do that, consider also using another PGP subkey for annotating
+# releases as deprecated.
+#
+# Set to emtpy variable if you use properly signed tags. You should do this!
+TAGS="--tags"
+
+srctree=.
+
+scm_version()
+{
+ local short
+ short=false
+
+
+ # Check for git and a git repo.
+ if test -z "$(git rev-parse --show-cdup 2>/dev/null)" &&
+ head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
+
+ # If we are at a tagged commit (like "v2.6.30-rc6"), we ignore
+ # it, because this version is defined in the top level Makefile.
+ if [ -z "`git describe $TAGS --exact-match 2>/dev/null`" ]; then
+
+ # If only the short version is requested, don't bother
+ # running further git commands
+ if $short; then
+ echo "+"
+ return
+ fi
+ # If we are past a tagged commit (like
+ # "v2.6.30-rc5-302-g72357d5"), we pretty print it.
+ if atag="`git describe $TAGS 2>/dev/null`"; then
+ echo "$atag" | awk -F- '{printf("-%05d-%s", $(NF-1),$(NF))}'
+
+ # If we don't have a tag at all we print -g{commitish}.
+ else
+ printf '%s%s' -g $head
+ fi
+ fi
+
+ # Check for uncommitted changes
+ if git diff-index --name-only HEAD | grep -qv "^scripts/package"; then
+ printf '%s' -dirty
+ fi
+
+ # All done with git
+ return
+ fi
+
+ # Check for mercurial and a mercurial repo.
+ if test -d .hg && hgid=`hg id 2>/dev/null`; then
+ # Do we have an tagged version? If so, latesttagdistance == 1
+ if [ "`hg log -r . --template '{latesttagdistance}'`" == "1" ]; then
+ id=`hg log -r . --template '{latesttag}'`
+ printf '%s%s' -hg "$id"
+ else
+ tag=`printf '%s' "$hgid" | cut -d' ' -f2`
+ if [ -z "$tag" -o "$tag" = tip ]; then
+ id=`printf '%s' "$hgid" | sed 's/[+ ].*//'`
+ printf '%s%s' -hg "$id"
+ fi
+ fi
+
+ # Are there uncommitted changes?
+ # These are represented by + after the changeset id.
+ case "$hgid" in
+ *+|*+\ *) printf '%s' -dirty ;;
+ esac
+
+ # All done with mercurial
+ return
+ fi
+}
+
+res="$res$(scm_version)"
+echo "$res"
diff --git a/backport/kconf/symbol.c b/backport/kconf/symbol.c
new file mode 100644
index 000000000000..0572330bf8a7
--- /dev/null
+++ b/backport/kconf/symbol.c
@@ -0,0 +1,1270 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ */
+
+#include <sys/types.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <regex.h>
+
+#include "lkc.h"
+
+struct symbol symbol_yes = {
+ .name = "y",
+ .curr = { "y", yes },
+ .flags = SYMBOL_CONST|SYMBOL_VALID,
+};
+
+struct symbol symbol_mod = {
+ .name = "m",
+ .curr = { "m", mod },
+ .flags = SYMBOL_CONST|SYMBOL_VALID,
+};
+
+struct symbol symbol_no = {
+ .name = "n",
+ .curr = { "n", no },
+ .flags = SYMBOL_CONST|SYMBOL_VALID,
+};
+
+static struct symbol symbol_empty = {
+ .name = "",
+ .curr = { "", no },
+ .flags = SYMBOL_VALID,
+};
+
+struct symbol *modules_sym;
+static tristate modules_val;
+
+enum symbol_type sym_get_type(struct symbol *sym)
+{
+ enum symbol_type type = sym->type;
+
+ if (type == S_TRISTATE) {
+ if (sym_is_choice_value(sym) && sym->visible == yes)
+ type = S_BOOLEAN;
+ else if (modules_val == no)
+ type = S_BOOLEAN;
+ }
+ return type;
+}
+
+const char *sym_type_name(enum symbol_type type)
+{
+ switch (type) {
+ case S_BOOLEAN:
+ return "bool";
+ case S_TRISTATE:
+ return "tristate";
+ case S_INT:
+ return "integer";
+ case S_HEX:
+ return "hex";
+ case S_STRING:
+ return "string";
+ case S_UNKNOWN:
+ return "unknown";
+ }
+ return "???";
+}
+
+struct property *sym_get_choice_prop(struct symbol *sym)
+{
+ struct property *prop;
+
+ for_all_choices(sym, prop)
+ return prop;
+ return NULL;
+}
+
+static struct property *sym_get_default_prop(struct symbol *sym)
+{
+ struct property *prop;
+
+ for_all_defaults(sym, prop) {
+ prop->visible.tri = expr_calc_value(prop->visible.expr);
+ if (prop->visible.tri != no)
+ return prop;
+ }
+ return NULL;
+}
+
+struct property *sym_get_range_prop(struct symbol *sym)
+{
+ struct property *prop;
+
+ for_all_properties(sym, prop, P_RANGE) {
+ prop->visible.tri = expr_calc_value(prop->visible.expr);
+ if (prop->visible.tri != no)
+ return prop;
+ }
+ return NULL;
+}
+
+static long long sym_get_range_val(struct symbol *sym, int base)
+{
+ sym_calc_value(sym);
+ switch (sym->type) {
+ case S_INT:
+ base = 10;
+ break;
+ case S_HEX:
+ base = 16;
+ break;
+ default:
+ break;
+ }
+ return strtoll(sym->curr.val, NULL, base);
+}
+
+static void sym_validate_range(struct symbol *sym)
+{
+ struct property *prop;
+ int base;
+ long long val, val2;
+ char str[64];
+
+ switch (sym->type) {
+ case S_INT:
+ base = 10;
+ break;
+ case S_HEX:
+ base = 16;
+ break;
+ default:
+ return;
+ }
+ prop = sym_get_range_prop(sym);
+ if (!prop)
+ return;
+ val = strtoll(sym->curr.val, NULL, base);
+ val2 = sym_get_range_val(prop->expr->left.sym, base);
+ if (val >= val2) {
+ val2 = sym_get_range_val(prop->expr->right.sym, base);
+ if (val <= val2)
+ return;
+ }
+ if (sym->type == S_INT)
+ sprintf(str, "%lld", val2);
+ else
+ sprintf(str, "0x%llx", val2);
+ sym->curr.val = xstrdup(str);
+}
+
+static void sym_set_changed(struct symbol *sym)
+{
+ struct property *prop;
+
+ sym->flags |= SYMBOL_CHANGED;
+ for (prop = sym->prop; prop; prop = prop->next) {
+ if (prop->menu)
+ prop->menu->flags |= MENU_CHANGED;
+ }
+}
+
+static void sym_set_all_changed(void)
+{
+ struct symbol *sym;
+ int i;
+
+ for_all_symbols(i, sym)
+ sym_set_changed(sym);
+}
+
+static void sym_calc_visibility(struct symbol *sym)
+{
+ struct property *prop;
+ struct symbol *choice_sym = NULL;
+ tristate tri;
+
+ /* any prompt visible? */
+ tri = no;
+
+ if (sym_is_choice_value(sym))
+ choice_sym = prop_get_symbol(sym_get_choice_prop(sym));
+
+ for_all_prompts(sym, prop) {
+ prop->visible.tri = expr_calc_value(prop->visible.expr);
+ /*
+ * Tristate choice_values with visibility 'mod' are
+ * not visible if the corresponding choice's value is
+ * 'yes'.
+ */
+ if (choice_sym && sym->type == S_TRISTATE &&
+ prop->visible.tri == mod && choice_sym->curr.tri == yes)
+ prop->visible.tri = no;
+
+ tri = EXPR_OR(tri, prop->visible.tri);
+ }
+ if (tri == mod && (sym->type != S_TRISTATE || modules_val == no))
+ tri = yes;
+ if (sym->visible != tri) {
+ sym->visible = tri;
+ sym_set_changed(sym);
+ }
+ if (sym_is_choice_value(sym))
+ return;
+ /* defaulting to "yes" if no explicit "depends on" are given */
+ tri = yes;
+ if (sym->dir_dep.expr)
+ tri = expr_calc_value(sym->dir_dep.expr);
+ if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
+ tri = yes;
+ if (sym->dir_dep.tri != tri) {
+ sym->dir_dep.tri = tri;
+ sym_set_changed(sym);
+ }
+ tri = no;
+ if (sym->rev_dep.expr)
+ tri = expr_calc_value(sym->rev_dep.expr);
+ if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
+ tri = yes;
+ if (sym->rev_dep.tri != tri) {
+ sym->rev_dep.tri = tri;
+ sym_set_changed(sym);
+ }
+ tri = no;
+ if (sym->implied.expr)
+ tri = expr_calc_value(sym->implied.expr);
+ if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
+ tri = yes;
+ if (sym->implied.tri != tri) {
+ sym->implied.tri = tri;
+ sym_set_changed(sym);
+ }
+}
+
+/*
+ * Find the default symbol for a choice.
+ * First try the default values for the choice symbol
+ * Next locate the first visible choice value
+ * Return NULL if none was found
+ */
+struct symbol *sym_choice_default(struct symbol *sym)
+{
+ struct symbol *def_sym;
+ struct property *prop;
+ struct expr *e;
+
+ /* any of the defaults visible? */
+ for_all_defaults(sym, prop) {
+ prop->visible.tri = expr_calc_value(prop->visible.expr);
+ if (prop->visible.tri == no)
+ continue;
+ def_sym = prop_get_symbol(prop);
+ if (def_sym->visible != no)
+ return def_sym;
+ }
+
+ /* just get the first visible value */
+ prop = sym_get_choice_prop(sym);
+ expr_list_for_each_sym(prop->expr, e, def_sym)
+ if (def_sym->visible != no)
+ return def_sym;
+
+ /* failed to locate any defaults */
+ return NULL;
+}
+
+static struct symbol *sym_calc_choice(struct symbol *sym)
+{
+ struct symbol *def_sym;
+ struct property *prop;
+ struct expr *e;
+ int flags;
+
+ /* first calculate all choice values' visibilities */
+ flags = sym->flags;
+ prop = sym_get_choice_prop(sym);
+ expr_list_for_each_sym(prop->expr, e, def_sym) {
+ sym_calc_visibility(def_sym);
+ if (def_sym->visible != no)
+ flags &= def_sym->flags;
+ }
+
+ sym->flags &= flags | ~SYMBOL_DEF_USER;
+
+ /* is the user choice visible? */
+ def_sym = sym->def[S_DEF_USER].val;
+ if (def_sym && def_sym->visible != no)
+ return def_sym;
+
+ def_sym = sym_choice_default(sym);
+
+ if (def_sym == NULL)
+ /* no choice? reset tristate value */
+ sym->curr.tri = no;
+
+ return def_sym;
+}
+
+static void sym_warn_unmet_dep(struct symbol *sym)
+{
+ struct gstr gs = str_new();
+
+ str_printf(&gs,
+ "\nWARNING: unmet direct dependencies detected for %s\n",
+ sym->name);
+ str_printf(&gs,
+ " Depends on [%c]: ",
+ sym->dir_dep.tri == mod ? 'm' : 'n');
+ expr_gstr_print(sym->dir_dep.expr, &gs);
+ str_printf(&gs, "\n");
+
+ expr_gstr_print_revdep(sym->rev_dep.expr, &gs, yes,
+ " Selected by [y]:\n");
+ expr_gstr_print_revdep(sym->rev_dep.expr, &gs, mod,
+ " Selected by [m]:\n");
+
+ fputs(str_get(&gs), stderr);
+}
+
+void sym_calc_value(struct symbol *sym)
+{
+ struct symbol_value newval, oldval;
+ struct property *prop;
+ struct expr *e;
+
+ if (!sym)
+ return;
+
+ if (sym->flags & SYMBOL_VALID)
+ return;
+
+ if (sym_is_choice_value(sym) &&
+ sym->flags & SYMBOL_NEED_SET_CHOICE_VALUES) {
+ sym->flags &= ~SYMBOL_NEED_SET_CHOICE_VALUES;
+ prop = sym_get_choice_prop(sym);
+ sym_calc_value(prop_get_symbol(prop));
+ }
+
+ sym->flags |= SYMBOL_VALID;
+
+ oldval = sym->curr;
+
+ switch (sym->type) {
+ case S_INT:
+ case S_HEX:
+ case S_STRING:
+ newval = symbol_empty.curr;
+ break;
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ newval = symbol_no.curr;
+ break;
+ default:
+ sym->curr.val = sym->name;
+ sym->curr.tri = no;
+ return;
+ }
+ sym->flags &= ~SYMBOL_WRITE;
+
+ sym_calc_visibility(sym);
+
+ if (sym->visible != no)
+ sym->flags |= SYMBOL_WRITE;
+
+ /* set default if recursively called */
+ sym->curr = newval;
+
+ switch (sym_get_type(sym)) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ if (sym_is_choice_value(sym) && sym->visible == yes) {
+ prop = sym_get_choice_prop(sym);
+ newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? yes : no;
+ } else {
+ if (sym->visible != no) {
+ /* if the symbol is visible use the user value
+ * if available, otherwise try the default value
+ */
+ if (sym_has_value(sym)) {
+ newval.tri = EXPR_AND(sym->def[S_DEF_USER].tri,
+ sym->visible);
+ goto calc_newval;
+ }
+ }
+ if (sym->rev_dep.tri != no)
+ sym->flags |= SYMBOL_WRITE;
+ if (!sym_is_choice(sym)) {
+ prop = sym_get_default_prop(sym);
+ if (prop) {
+ newval.tri = EXPR_AND(expr_calc_value(prop->expr),
+ prop->visible.tri);
+ if (newval.tri != no)
+ sym->flags |= SYMBOL_WRITE;
+ }
+ if (sym->implied.tri != no) {
+ sym->flags |= SYMBOL_WRITE;
+ newval.tri = EXPR_OR(newval.tri, sym->implied.tri);
+ newval.tri = EXPR_AND(newval.tri,
+ sym->dir_dep.tri);
+ }
+ }
+ calc_newval:
+ if (sym->dir_dep.tri < sym->rev_dep.tri)
+ sym_warn_unmet_dep(sym);
+ newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
+ }
+ if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
+ newval.tri = yes;
+ break;
+ case S_STRING:
+ case S_HEX:
+ case S_INT:
+ if (sym->visible != no && sym_has_value(sym)) {
+ newval.val = sym->def[S_DEF_USER].val;
+ break;
+ }
+ prop = sym_get_default_prop(sym);
+ if (prop) {
+ struct symbol *ds = prop_get_symbol(prop);
+ if (ds) {
+ sym->flags |= SYMBOL_WRITE;
+ sym_calc_value(ds);
+ newval.val = ds->curr.val;
+ }
+ }
+ break;
+ default:
+ ;
+ }
+
+ sym->curr = newval;
+ if (sym_is_choice(sym) && newval.tri == yes)
+ sym->curr.val = sym_calc_choice(sym);
+ sym_validate_range(sym);
+
+ if (memcmp(&oldval, &sym->curr, sizeof(oldval))) {
+ sym_set_changed(sym);
+ if (modules_sym == sym) {
+ sym_set_all_changed();
+ modules_val = modules_sym->curr.tri;
+ }
+ }
+
+ if (sym_is_choice(sym)) {
+ struct symbol *choice_sym;
+
+ prop = sym_get_choice_prop(sym);
+ expr_list_for_each_sym(prop->expr, e, choice_sym) {
+ if ((sym->flags & SYMBOL_WRITE) &&
+ choice_sym->visible != no)
+ choice_sym->flags |= SYMBOL_WRITE;
+ if (sym->flags & SYMBOL_CHANGED)
+ sym_set_changed(choice_sym);
+ }
+ }
+
+ if (sym->flags & SYMBOL_NO_WRITE)
+ sym->flags &= ~SYMBOL_WRITE;
+
+ if (sym->flags & SYMBOL_NEED_SET_CHOICE_VALUES)
+ set_all_choice_values(sym);
+}
+
+void sym_clear_all_valid(void)
+{
+ struct symbol *sym;
+ int i;
+
+ for_all_symbols(i, sym)
+ sym->flags &= ~SYMBOL_VALID;
+ conf_set_changed(true);
+ sym_calc_value(modules_sym);
+}
+
+bool sym_tristate_within_range(struct symbol *sym, tristate val)
+{
+ int type = sym_get_type(sym);
+
+ if (sym->visible == no)
+ return false;
+
+ if (type != S_BOOLEAN && type != S_TRISTATE)
+ return false;
+
+ if (type == S_BOOLEAN && val == mod)
+ return false;
+ if (sym->visible <= sym->rev_dep.tri)
+ return false;
+ if (sym_is_choice_value(sym) && sym->visible == yes)
+ return val == yes;
+ return val >= sym->rev_dep.tri && val <= sym->visible;
+}
+
+bool sym_set_tristate_value(struct symbol *sym, tristate val)
+{
+ tristate oldval = sym_get_tristate_value(sym);
+
+ if (oldval != val && !sym_tristate_within_range(sym, val))
+ return false;
+
+ if (!(sym->flags & SYMBOL_DEF_USER)) {
+ sym->flags |= SYMBOL_DEF_USER;
+ sym_set_changed(sym);
+ }
+ /*
+ * setting a choice value also resets the new flag of the choice
+ * symbol and all other choice values.
+ */
+ if (sym_is_choice_value(sym) && val == yes) {
+ struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
+ struct property *prop;
+ struct expr *e;
+
+ cs->def[S_DEF_USER].val = sym;
+ cs->flags |= SYMBOL_DEF_USER;
+ prop = sym_get_choice_prop(cs);
+ for (e = prop->expr; e; e = e->left.expr) {
+ if (e->right.sym->visible != no)
+ e->right.sym->flags |= SYMBOL_DEF_USER;
+ }
+ }
+
+ sym->def[S_DEF_USER].tri = val;
+ if (oldval != val)
+ sym_clear_all_valid();
+
+ return true;
+}
+
+tristate sym_toggle_tristate_value(struct symbol *sym)
+{
+ tristate oldval, newval;
+
+ oldval = newval = sym_get_tristate_value(sym);
+ do {
+ switch (newval) {
+ case no:
+ newval = mod;
+ break;
+ case mod:
+ newval = yes;
+ break;
+ case yes:
+ newval = no;
+ break;
+ }
+ if (sym_set_tristate_value(sym, newval))
+ break;
+ } while (oldval != newval);
+ return newval;
+}
+
+bool sym_string_valid(struct symbol *sym, const char *str)
+{
+ signed char ch;
+
+ switch (sym->type) {
+ case S_STRING:
+ return true;
+ case S_INT:
+ ch = *str++;
+ if (ch == '-')
+ ch = *str++;
+ if (!isdigit(ch))
+ return false;
+ if (ch == '0' && *str != 0)
+ return false;
+ while ((ch = *str++)) {
+ if (!isdigit(ch))
+ return false;
+ }
+ return true;
+ case S_HEX:
+ if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
+ str += 2;
+ ch = *str++;
+ do {
+ if (!isxdigit(ch))
+ return false;
+ } while ((ch = *str++));
+ return true;
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ switch (str[0]) {
+ case 'y': case 'Y':
+ case 'm': case 'M':
+ case 'n': case 'N':
+ return true;
+ }
+ return false;
+ default:
+ return false;
+ }
+}
+
+bool sym_string_within_range(struct symbol *sym, const char *str)
+{
+ struct property *prop;
+ long long val;
+
+ switch (sym->type) {
+ case S_STRING:
+ return sym_string_valid(sym, str);
+ case S_INT:
+ if (!sym_string_valid(sym, str))
+ return false;
+ prop = sym_get_range_prop(sym);
+ if (!prop)
+ return true;
+ val = strtoll(str, NULL, 10);
+ return val >= sym_get_range_val(prop->expr->left.sym, 10) &&
+ val <= sym_get_range_val(prop->expr->right.sym, 10);
+ case S_HEX:
+ if (!sym_string_valid(sym, str))
+ return false;
+ prop = sym_get_range_prop(sym);
+ if (!prop)
+ return true;
+ val = strtoll(str, NULL, 16);
+ return val >= sym_get_range_val(prop->expr->left.sym, 16) &&
+ val <= sym_get_range_val(prop->expr->right.sym, 16);
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ switch (str[0]) {
+ case 'y': case 'Y':
+ return sym_tristate_within_range(sym, yes);
+ case 'm': case 'M':
+ return sym_tristate_within_range(sym, mod);
+ case 'n': case 'N':
+ return sym_tristate_within_range(sym, no);
+ }
+ return false;
+ default:
+ return false;
+ }
+}
+
+bool sym_set_string_value(struct symbol *sym, const char *newval)
+{
+ const char *oldval;
+ char *val;
+ int size;
+
+ switch (sym->type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ switch (newval[0]) {
+ case 'y': case 'Y':
+ return sym_set_tristate_value(sym, yes);
+ case 'm': case 'M':
+ return sym_set_tristate_value(sym, mod);
+ case 'n': case 'N':
+ return sym_set_tristate_value(sym, no);
+ }
+ return false;
+ default:
+ ;
+ }
+
+ if (!sym_string_within_range(sym, newval))
+ return false;
+
+ if (!(sym->flags & SYMBOL_DEF_USER)) {
+ sym->flags |= SYMBOL_DEF_USER;
+ sym_set_changed(sym);
+ }
+
+ oldval = sym->def[S_DEF_USER].val;
+ size = strlen(newval) + 1;
+ if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && newval[1] != 'X'))) {
+ size += 2;
+ sym->def[S_DEF_USER].val = val = xmalloc(size);
+ *val++ = '0';
+ *val++ = 'x';
+ } else if (!oldval || strcmp(oldval, newval))
+ sym->def[S_DEF_USER].val = val = xmalloc(size);
+ else
+ return true;
+
+ strcpy(val, newval);
+ free((void *)oldval);
+ sym_clear_all_valid();
+
+ return true;
+}
+
+/*
+ * Find the default value associated to a symbol.
+ * For tristate symbol handle the modules=n case
+ * in which case "m" becomes "y".
+ * If the symbol does not have any default then fallback
+ * to the fixed default values.
+ */
+const char *sym_get_string_default(struct symbol *sym)
+{
+ struct property *prop;
+ struct symbol *ds;
+ const char *str;
+ tristate val;
+
+ sym_calc_visibility(sym);
+ sym_calc_value(modules_sym);
+ val = symbol_no.curr.tri;
+ str = symbol_empty.curr.val;
+
+ /* If symbol has a default value look it up */
+ prop = sym_get_default_prop(sym);
+ if (prop != NULL) {
+ switch (sym->type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ /* The visibility may limit the value from yes => mod */
+ val = EXPR_AND(expr_calc_value(prop->expr), prop->visible.tri);
+ break;
+ default:
+ /*
+ * The following fails to handle the situation
+ * where a default value is further limited by
+ * the valid range.
+ */
+ ds = prop_get_symbol(prop);
+ if (ds != NULL) {
+ sym_calc_value(ds);
+ str = (const char *)ds->curr.val;
+ }
+ }
+ }
+
+ /* Handle select statements */
+ val = EXPR_OR(val, sym->rev_dep.tri);
+
+ /* transpose mod to yes if modules are not enabled */
+ if (val == mod)
+ if (!sym_is_choice_value(sym) && modules_sym->curr.tri == no)
+ val = yes;
+
+ /* transpose mod to yes if type is bool */
+ if (sym->type == S_BOOLEAN && val == mod)
+ val = yes;
+
+ /* adjust the default value if this symbol is implied by another */
+ if (val < sym->implied.tri)
+ val = sym->implied.tri;
+
+ switch (sym->type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ switch (val) {
+ case no: return "n";
+ case mod: return "m";
+ case yes: return "y";
+ }
+ case S_INT:
+ case S_HEX:
+ return str;
+ case S_STRING:
+ return str;
+ case S_UNKNOWN:
+ break;
+ }
+ return "";
+}
+
+const char *sym_get_string_value(struct symbol *sym)
+{
+ tristate val;
+
+ switch (sym->type) {
+ case S_BOOLEAN:
+ case S_TRISTATE:
+ val = sym_get_tristate_value(sym);
+ switch (val) {
+ case no:
+ return "n";
+ case mod:
+ sym_calc_value(modules_sym);
+ return (modules_sym->curr.tri == no) ? "n" : "m";
+ case yes:
+ return "y";
+ }
+ break;
+ default:
+ ;
+ }
+ return (const char *)sym->curr.val;
+}
+
+bool sym_is_changeable(struct symbol *sym)
+{
+ return sym->visible > sym->rev_dep.tri;
+}
+
+static unsigned strhash(const char *s)
+{
+ /* fnv32 hash */
+ unsigned hash = 2166136261U;
+ for (; *s; s++)
+ hash = (hash ^ *s) * 0x01000193;
+ return hash;
+}
+
+struct symbol *sym_lookup(const char *name, int flags)
+{
+ struct symbol *symbol;
+ char *new_name;
+ int hash;
+
+ if (name) {
+ if (name[0] && !name[1]) {
+ switch (name[0]) {
+ case 'y': return &symbol_yes;
+ case 'm': return &symbol_mod;
+ case 'n': return &symbol_no;
+ }
+ }
+ hash = strhash(name) % SYMBOL_HASHSIZE;
+
+ for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
+ if (symbol->name &&
+ !strcmp(symbol->name, name) &&
+ (flags ? symbol->flags & flags
+ : !(symbol->flags & (SYMBOL_CONST|SYMBOL_CHOICE))))
+ return symbol;
+ }
+ new_name = xstrdup(name);
+ } else {
+ new_name = NULL;
+ hash = 0;
+ }
+
+ symbol = xmalloc(sizeof(*symbol));
+ memset(symbol, 0, sizeof(*symbol));
+ symbol->name = new_name;
+ symbol->type = S_UNKNOWN;
+ symbol->flags = flags;
+
+ symbol->next = symbol_hash[hash];
+ symbol_hash[hash] = symbol;
+
+ return symbol;
+}
+
+struct symbol *sym_find(const char *name)
+{
+ struct symbol *symbol = NULL;
+ int hash = 0;
+
+ if (!name)
+ return NULL;
+
+ if (name[0] && !name[1]) {
+ switch (name[0]) {
+ case 'y': return &symbol_yes;
+ case 'm': return &symbol_mod;
+ case 'n': return &symbol_no;
+ }
+ }
+ hash = strhash(name) % SYMBOL_HASHSIZE;
+
+ for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
+ if (symbol->name &&
+ !strcmp(symbol->name, name) &&
+ !(symbol->flags & SYMBOL_CONST))
+ break;
+ }
+
+ return symbol;
+}
+
+struct sym_match {
+ struct symbol *sym;
+ off_t so, eo;
+};
+
+/* Compare matched symbols as thus:
+ * - first, symbols that match exactly
+ * - then, alphabetical sort
+ */
+static int sym_rel_comp(const void *sym1, const void *sym2)
+{
+ const struct sym_match *s1 = sym1;
+ const struct sym_match *s2 = sym2;
+ int exact1, exact2;
+
+ /* Exact match:
+ * - if matched length on symbol s1 is the length of that symbol,
+ * then this symbol should come first;
+ * - if matched length on symbol s2 is the length of that symbol,
+ * then this symbol should come first.
+ * Note: since the search can be a regexp, both symbols may match
+ * exactly; if this is the case, we can't decide which comes first,
+ * and we fallback to sorting alphabetically.
+ */
+ exact1 = (s1->eo - s1->so) == strlen(s1->sym->name);
+ exact2 = (s2->eo - s2->so) == strlen(s2->sym->name);
+ if (exact1 && !exact2)
+ return -1;
+ if (!exact1 && exact2)
+ return 1;
+
+ /* As a fallback, sort symbols alphabetically */
+ return strcmp(s1->sym->name, s2->sym->name);
+}
+
+struct symbol **sym_re_search(const char *pattern)
+{
+ struct symbol *sym, **sym_arr = NULL;
+ struct sym_match *sym_match_arr = NULL;
+ int i, cnt, size;
+ regex_t re;
+ regmatch_t match[1];
+
+ cnt = size = 0;
+ /* Skip if empty */
+ if (strlen(pattern) == 0)
+ return NULL;
+ if (regcomp(&re, pattern, REG_EXTENDED|REG_ICASE))
+ return NULL;
+
+ for_all_symbols(i, sym) {
+ if (sym->flags & SYMBOL_CONST || !sym->name)
+ continue;
+ if (regexec(&re, sym->name, 1, match, 0))
+ continue;
+ if (cnt >= size) {
+ void *tmp;
+ size += 16;
+ tmp = realloc(sym_match_arr, size * sizeof(struct sym_match));
+ if (!tmp)
+ goto sym_re_search_free;
+ sym_match_arr = tmp;
+ }
+ sym_calc_value(sym);
+ /* As regexec returned 0, we know we have a match, so
+ * we can use match[0].rm_[se]o without further checks
+ */
+ sym_match_arr[cnt].so = match[0].rm_so;
+ sym_match_arr[cnt].eo = match[0].rm_eo;
+ sym_match_arr[cnt++].sym = sym;
+ }
+ if (sym_match_arr) {
+ qsort(sym_match_arr, cnt, sizeof(struct sym_match), sym_rel_comp);
+ sym_arr = malloc((cnt+1) * sizeof(struct symbol *));
+ if (!sym_arr)
+ goto sym_re_search_free;
+ for (i = 0; i < cnt; i++)
+ sym_arr[i] = sym_match_arr[i].sym;
+ sym_arr[cnt] = NULL;
+ }
+sym_re_search_free:
+ /* sym_match_arr can be NULL if no match, but free(NULL) is OK */
+ free(sym_match_arr);
+ regfree(&re);
+
+ return sym_arr;
+}
+
+/*
+ * When we check for recursive dependencies we use a stack to save
+ * current state so we can print out relevant info to user.
+ * The entries are located on the call stack so no need to free memory.
+ * Note insert() remove() must always match to properly clear the stack.
+ */
+static struct dep_stack {
+ struct dep_stack *prev, *next;
+ struct symbol *sym;
+ struct property *prop;
+ struct expr **expr;
+} *check_top;
+
+static void dep_stack_insert(struct dep_stack *stack, struct symbol *sym)
+{
+ memset(stack, 0, sizeof(*stack));
+ if (check_top)
+ check_top->next = stack;
+ stack->prev = check_top;
+ stack->sym = sym;
+ check_top = stack;
+}
+
+static void dep_stack_remove(void)
+{
+ check_top = check_top->prev;
+ if (check_top)
+ check_top->next = NULL;
+}
+
+/*
+ * Called when we have detected a recursive dependency.
+ * check_top point to the top of the stact so we use
+ * the ->prev pointer to locate the bottom of the stack.
+ */
+static void sym_check_print_recursive(struct symbol *last_sym)
+{
+ struct dep_stack *stack;
+ struct symbol *sym, *next_sym;
+ struct menu *menu = NULL;
+ struct property *prop;
+ struct dep_stack cv_stack;
+
+ if (sym_is_choice_value(last_sym)) {
+ dep_stack_insert(&cv_stack, last_sym);
+ last_sym = prop_get_symbol(sym_get_choice_prop(last_sym));
+ }
+
+ for (stack = check_top; stack != NULL; stack = stack->prev)
+ if (stack->sym == last_sym)
+ break;
+ if (!stack) {
+ fprintf(stderr, "unexpected recursive dependency error\n");
+ return;
+ }
+
+ for (; stack; stack = stack->next) {
+ sym = stack->sym;
+ next_sym = stack->next ? stack->next->sym : last_sym;
+ prop = stack->prop;
+ if (prop == NULL)
+ prop = stack->sym->prop;
+
+ /* for choice values find the menu entry (used below) */
+ if (sym_is_choice(sym) || sym_is_choice_value(sym)) {
+ for (prop = sym->prop; prop; prop = prop->next) {
+ menu = prop->menu;
+ if (prop->menu)
+ break;
+ }
+ }
+ if (stack->sym == last_sym)
+ fprintf(stderr, "%s:%d:error: recursive dependency detected!\n",
+ prop->file->name, prop->lineno);
+
+ if (sym_is_choice(sym)) {
+ fprintf(stderr, "%s:%d:\tchoice %s contains symbol %s\n",
+ menu->file->name, menu->lineno,
+ sym->name ? sym->name : "<choice>",
+ next_sym->name ? next_sym->name : "<choice>");
+ } else if (sym_is_choice_value(sym)) {
+ fprintf(stderr, "%s:%d:\tsymbol %s is part of choice %s\n",
+ menu->file->name, menu->lineno,
+ sym->name ? sym->name : "<choice>",
+ next_sym->name ? next_sym->name : "<choice>");
+ } else if (stack->expr == &sym->dir_dep.expr) {
+ fprintf(stderr, "%s:%d:\tsymbol %s depends on %s\n",
+ prop->file->name, prop->lineno,
+ sym->name ? sym->name : "<choice>",
+ next_sym->name ? next_sym->name : "<choice>");
+ } else if (stack->expr == &sym->rev_dep.expr) {
+ fprintf(stderr, "%s:%d:\tsymbol %s is selected by %s\n",
+ prop->file->name, prop->lineno,
+ sym->name ? sym->name : "<choice>",
+ next_sym->name ? next_sym->name : "<choice>");
+ } else if (stack->expr == &sym->implied.expr) {
+ fprintf(stderr, "%s:%d:\tsymbol %s is implied by %s\n",
+ prop->file->name, prop->lineno,
+ sym->name ? sym->name : "<choice>",
+ next_sym->name ? next_sym->name : "<choice>");
+ } else if (stack->expr) {
+ fprintf(stderr, "%s:%d:\tsymbol %s %s value contains %s\n",
+ prop->file->name, prop->lineno,
+ sym->name ? sym->name : "<choice>",
+ prop_get_type_name(prop->type),
+ next_sym->name ? next_sym->name : "<choice>");
+ } else {
+ fprintf(stderr, "%s:%d:\tsymbol %s %s is visible depending on %s\n",
+ prop->file->name, prop->lineno,
+ sym->name ? sym->name : "<choice>",
+ prop_get_type_name(prop->type),
+ next_sym->name ? next_sym->name : "<choice>");
+ }
+ }
+
+ fprintf(stderr,
+ "For a resolution refer to Documentation/kbuild/kconfig-language.rst\n"
+ "subsection \"Kconfig recursive dependency limitations\"\n"
+ "\n");
+
+ if (check_top == &cv_stack)
+ dep_stack_remove();
+}
+
+static struct symbol *sym_check_expr_deps(struct expr *e)
+{
+ struct symbol *sym;
+
+ if (!e)
+ return NULL;
+ switch (e->type) {
+ case E_OR:
+ case E_AND:
+ sym = sym_check_expr_deps(e->left.expr);
+ if (sym)
+ return sym;
+ return sym_check_expr_deps(e->right.expr);
+ case E_NOT:
+ return sym_check_expr_deps(e->left.expr);
+ case E_EQUAL:
+ case E_GEQ:
+ case E_GTH:
+ case E_LEQ:
+ case E_LTH:
+ case E_UNEQUAL:
+ sym = sym_check_deps(e->left.sym);
+ if (sym)
+ return sym;
+ return sym_check_deps(e->right.sym);
+ case E_SYMBOL:
+ return sym_check_deps(e->left.sym);
+ default:
+ break;
+ }
+ fprintf(stderr, "Oops! How to check %d?\n", e->type);
+ return NULL;
+}
+
+/* return NULL when dependencies are OK */
+static struct symbol *sym_check_sym_deps(struct symbol *sym)
+{
+ struct symbol *sym2;
+ struct property *prop;
+ struct dep_stack stack;
+
+ dep_stack_insert(&stack, sym);
+
+ stack.expr = &sym->dir_dep.expr;
+ sym2 = sym_check_expr_deps(sym->dir_dep.expr);
+ if (sym2)
+ goto out;
+
+ stack.expr = &sym->rev_dep.expr;
+ sym2 = sym_check_expr_deps(sym->rev_dep.expr);
+ if (sym2)
+ goto out;
+
+ stack.expr = &sym->implied.expr;
+ sym2 = sym_check_expr_deps(sym->implied.expr);
+ if (sym2)
+ goto out;
+
+ stack.expr = NULL;
+
+ for (prop = sym->prop; prop; prop = prop->next) {
+ if (prop->type == P_CHOICE || prop->type == P_SELECT ||
+ prop->type == P_IMPLY)
+ continue;
+ stack.prop = prop;
+ sym2 = sym_check_expr_deps(prop->visible.expr);
+ if (sym2)
+ break;
+ if (prop->type != P_DEFAULT || sym_is_choice(sym))
+ continue;
+ stack.expr = &prop->expr;
+ sym2 = sym_check_expr_deps(prop->expr);
+ if (sym2)
+ break;
+ stack.expr = NULL;
+ }
+
+out:
+ dep_stack_remove();
+
+ return sym2;
+}
+
+static struct symbol *sym_check_choice_deps(struct symbol *choice)
+{
+ struct symbol *sym, *sym2;
+ struct property *prop;
+ struct expr *e;
+ struct dep_stack stack;
+
+ dep_stack_insert(&stack, choice);
+
+ prop = sym_get_choice_prop(choice);
+ expr_list_for_each_sym(prop->expr, e, sym)
+ sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
+
+ choice->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
+ sym2 = sym_check_sym_deps(choice);
+ choice->flags &= ~SYMBOL_CHECK;
+ if (sym2)
+ goto out;
+
+ expr_list_for_each_sym(prop->expr, e, sym) {
+ sym2 = sym_check_sym_deps(sym);
+ if (sym2)
+ break;
+ }
+out:
+ expr_list_for_each_sym(prop->expr, e, sym)
+ sym->flags &= ~SYMBOL_CHECK;
+
+ if (sym2 && sym_is_choice_value(sym2) &&
+ prop_get_symbol(sym_get_choice_prop(sym2)) == choice)
+ sym2 = choice;
+
+ dep_stack_remove();
+
+ return sym2;
+}
+
+struct symbol *sym_check_deps(struct symbol *sym)
+{
+ struct symbol *sym2;
+ struct property *prop;
+
+ if (sym->flags & SYMBOL_CHECK) {
+ sym_check_print_recursive(sym);
+ return sym;
+ }
+ if (sym->flags & SYMBOL_CHECKED)
+ return NULL;
+
+ if (sym_is_choice_value(sym)) {
+ struct dep_stack stack;
+
+ /* for choice groups start the check with main choice symbol */
+ dep_stack_insert(&stack, sym);
+ prop = sym_get_choice_prop(sym);
+ sym2 = sym_check_deps(prop_get_symbol(prop));
+ dep_stack_remove();
+ } else if (sym_is_choice(sym)) {
+ sym2 = sym_check_choice_deps(sym);
+ } else {
+ sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
+ sym2 = sym_check_sym_deps(sym);
+ sym->flags &= ~SYMBOL_CHECK;
+ }
+
+ return sym2;
+}
+
+struct symbol *prop_get_symbol(struct property *prop)
+{
+ if (prop->expr && (prop->expr->type == E_SYMBOL ||
+ prop->expr->type == E_LIST))
+ return prop->expr->left.sym;
+ return NULL;
+}
+
+const char *prop_get_type_name(enum prop_type type)
+{
+ switch (type) {
+ case P_PROMPT:
+ return "prompt";
+ case P_COMMENT:
+ return "comment";
+ case P_MENU:
+ return "menu";
+ case P_DEFAULT:
+ return "default";
+ case P_CHOICE:
+ return "choice";
+ case P_SELECT:
+ return "select";
+ case P_IMPLY:
+ return "imply";
+ case P_RANGE:
+ return "range";
+ case P_SYMBOL:
+ return "symbol";
+ case P_UNKNOWN:
+ break;
+ }
+ return "unknown";
+}
diff --git a/backport/kconf/update-upstream-kconfig.sh b/backport/kconf/update-upstream-kconfig.sh
new file mode 100755
index 000000000000..6701919e890d
--- /dev/null
+++ b/backport/kconf/update-upstream-kconfig.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+UPSTREAM="$HOME/linux-next/"
+
+KCONFIG_UPSTREAM="conf.c"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM confdata.c"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM expr.c"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM expr.h"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM list.h"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM lkc.h"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM lkc_proto.h"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM lxdialog"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM mconf.c"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM mconf-cfg.sh"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM menu.c"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM nconf.c"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM nconf-cfg.sh"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM nconf.gui.c"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM nconf.h"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM preprocess.c"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM symbol.c"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM util.c"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM lexer.l"
+KCONFIG_UPSTREAM="$KCONFIG_UPSTREAM parser.y"
+
+for i in $KCONFIG_UPSTREAM; do
+ cp -a $UPSTREAM/scripts/kconfig/$i .
+done
diff --git a/backport/kconf/util.c b/backport/kconf/util.c
new file mode 100644
index 000000000000..29585394df71
--- /dev/null
+++ b/backport/kconf/util.c
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2002-2005 Roman Zippel <zippel@linux-m68k.org>
+ * Copyright (C) 2002-2005 Sam Ravnborg <sam@ravnborg.org>
+ */
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include "lkc.h"
+
+/* file already present in list? If not add it */
+struct file *file_lookup(const char *name)
+{
+ struct file *file;
+
+ for (file = file_list; file; file = file->next) {
+ if (!strcmp(name, file->name)) {
+ return file;
+ }
+ }
+
+ file = xmalloc(sizeof(*file));
+ memset(file, 0, sizeof(*file));
+ file->name = xstrdup(name);
+ file->next = file_list;
+ file_list = file;
+ return file;
+}
+
+/* Allocate initial growable string */
+struct gstr str_new(void)
+{
+ struct gstr gs;
+ gs.s = xmalloc(sizeof(char) * 64);
+ gs.len = 64;
+ gs.max_width = 0;
+ strcpy(gs.s, "\0");
+ return gs;
+}
+
+/* Free storage for growable string */
+void str_free(struct gstr *gs)
+{
+ if (gs->s)
+ free(gs->s);
+ gs->s = NULL;
+ gs->len = 0;
+}
+
+/* Append to growable string */
+void str_append(struct gstr *gs, const char *s)
+{
+ size_t l;
+ if (s) {
+ l = strlen(gs->s) + strlen(s) + 1;
+ if (l > gs->len) {
+ gs->s = xrealloc(gs->s, l);
+ gs->len = l;
+ }
+ strcat(gs->s, s);
+ }
+}
+
+/* Append printf formatted string to growable string */
+void str_printf(struct gstr *gs, const char *fmt, ...)
+{
+ va_list ap;
+ char s[10000]; /* big enough... */
+ va_start(ap, fmt);
+ vsnprintf(s, sizeof(s), fmt, ap);
+ str_append(gs, s);
+ va_end(ap);
+}
+
+/* Retrieve value of growable string */
+const char *str_get(struct gstr *gs)
+{
+ return gs->s;
+}
+
+void *xmalloc(size_t size)
+{
+ void *p = malloc(size);
+ if (p)
+ return p;
+ fprintf(stderr, "Out of memory.\n");
+ exit(1);
+}
+
+void *xcalloc(size_t nmemb, size_t size)
+{
+ void *p = calloc(nmemb, size);
+ if (p)
+ return p;
+ fprintf(stderr, "Out of memory.\n");
+ exit(1);
+}
+
+void *xrealloc(void *p, size_t size)
+{
+ p = realloc(p, size);
+ if (p)
+ return p;
+ fprintf(stderr, "Out of memory.\n");
+ exit(1);
+}
+
+char *xstrdup(const char *s)
+{
+ char *p;
+
+ p = strdup(s);
+ if (p)
+ return p;
+ fprintf(stderr, "Out of memory.\n");
+ exit(1);
+}
+
+char *xstrndup(const char *s, size_t n)
+{
+ char *p;
+
+ p = strndup(s, n);
+ if (p)
+ return p;
+ fprintf(stderr, "Out of memory.\n");
+ exit(1);
+}
--
2.30.2
--
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next prev parent reply other threads:[~2022-05-13 16:06 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-13 16:05 [PATCH v2 00/15] Resurrect Integration Mode v2 Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 01/15] backport/kconf: remove our version of kconfig Thomas Pedersen
2022-05-13 16:05 ` Thomas Pedersen [this message]
2022-05-13 16:05 ` [PATCH v2 03/15] kconfig: fix backport syntax to work with linux-next next-20220204 Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 04/15] Makefile.subtrees: document how to update kconfig Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 05/15] backport: define BACKPORT_DIR for Kconfig.integrate Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 06/15] gentree: update kconfig source var to new kconfig format Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 07/15] gentree: try to make patch operation idempotent in case of --clean Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 08/15] gentree: do not prefix Kernel.local symbols Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 09/15] lib/bpversion: calculate Kconfig.versions for next major version Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 10/15] backport: expose BP_MODULES in package mode only Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 11/15] kconfig: fix select conversion for BPAUTO_ symbols in integration mode Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 12/15] integration-patches: refresh integration patch Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 13/15] integration-patches: make patches per target kernel version Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 14/15] integration-patches: support 5.4 target kernel Thomas Pedersen
2022-05-13 16:05 ` [PATCH v2 15/15] patches: fixup skb list patch Thomas Pedersen
2022-05-13 16:37 ` [PATCH v2 00/15] Resurrect Integration Mode v2 Luis Chamberlain
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