[PATCH 5/5] mkfs: generate mkfs config file in man page

["Darrick J. Wong" <darrick.wong@oracle.com>]

From: Darrick J. Wong <darrick.wong@oracle.com>

Generate the default mkfs config file in the man page.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 Makefile               |    1 +
 man/man8/Makefile      |   13 ++++++++++---
 man/man8/mkfs.xfs.8.in |   35 +----------------------------------
 mkfs/mkconfig.c        |   22 ++++++++++++++++------
 4 files changed, 28 insertions(+), 43 deletions(-)


diff --git a/Makefile b/Makefile
index 7ddfa316..947eaaf5 100644
--- a/Makefile
+++ b/Makefile
@@ -92,6 +92,7 @@ copy: libxlog
 mkfs: libxcmd
 spaceman: libxcmd
 scrub: libhandle libxcmd
+man: mkfs
 
 ifeq ($(HAVE_BUILDDEFS), yes)
 include $(BUILDRULES)
diff --git a/man/man8/Makefile b/man/man8/Makefile
index 08e5e0d7..67a67cd2 100644
--- a/man/man8/Makefile
+++ b/man/man8/Makefile
@@ -13,13 +13,20 @@ LSRCFILES	= $(MAN_PAGES)
 
 default : $(MAN_PAGES)
 
-LDIRT		= mkfs.xfs.8
+LDIRT		= mkfs.xfs.8 cfg.8
 
 include $(BUILDRULES)
 
-mkfs.xfs.8: mkfs.xfs.8.in
+cfg.8: ../../mkfs/mkconfig
+	@echo "    [GENERATE] $@"
+	$(Q) ../../mkfs/mkconfig -m > $@
+
+mkfs.xfs.8: mkfs.xfs.8.in cfg.8
 	@echo "    [SED]    $@"
-	$(Q)$(SED) -e "s|@sysconfdir@|$(PKG_ETC_DIR)|g" < $< > $@
+	$(Q) $(SED) -e "s|@sysconfdir@|$(PKG_ETC_DIR)|g" \
+		   -e "/@default_mkfs_cfg@/r cfg.8" \
+		   -e "s/@default_mkfs_cfg@//g" \
+		   < $< > $@
 
 install : default
 	$(INSTALL) -m 755 -d $(MAN_DEST)
diff --git a/man/man8/mkfs.xfs.8.in b/man/man8/mkfs.xfs.8.in
index cf4bdf82..4a557910 100644
--- a/man/man8/mkfs.xfs.8.in
+++ b/man/man8/mkfs.xfs.8.in
@@ -970,40 +970,7 @@ Currently all default parameters can only be either enabled or disabled,
 with a value of 1 to enable or 0 to disable.
 See below for a list of all supported configuration parameters and their
 current built-in default settings.
-.PP
-.BI [data]
-.br
-.BI noalign=0
-.PP
-.BI [inode]
-.br
-.BI align=1
-.br
-.BI projid32bit=1
-.br
-.BI sparse=0
-.PP
-.BI [log]
-.br
-.BI lazy-count=1
-.PP
-.BI [metadata]
-.br
-.BI crc=1
-.br
-.BI finobt=1
-.br
-.BI rmapbt=0
-.br
-.BI reflink=0
-.PP
-.BI [naming]
-.br
-.BI ftype=1
-.PP
-.BI [rtdev]
-.br
-.BI noalign=0
+@default_mkfs_cfg@
 .PP
 .SH SEE ALSO
 .BR xfs (5),
diff --git a/mkfs/mkconfig.c b/mkfs/mkconfig.c
index 3826b0bf..ef00f6d9 100644
--- a/mkfs/mkconfig.c
+++ b/mkfs/mkconfig.c
@@ -124,9 +124,13 @@ main(
 	struct subopt_map	*submap;
 	int			c;
 	unsigned int		i, j;
+	bool			manpage = false;
 
-	while ((c = getopt(argc, argv, "")) != EOF) {
+	while ((c = getopt(argc, argv, "m")) != EOF) {
 		switch (c) {
+		case 'm':
+			manpage = true;
+			break;
 		case '?':
 			fprintf(stderr, "Unknown option %c.\n", optopt);
 			return 1;
@@ -137,19 +141,25 @@ main(
 		return 1;
 	}
 
-	printf("# mkfs.xfs configuration file to collect settings.\n");
-	printf("# See the mkfs.xfs(8) manpage for details.\n");
-	printf("# Copy this file to %s/%s to override the built-in defaults.\n",
-			MKFS_XFS_CONF_DIR, MKFS_XFS_DEFAULT_CONFIG);
+	if (!manpage) {
+		printf("# mkfs.xfs configuration file to collect settings.\n");
+		printf("# See the mkfs.xfs(8) manpage for details.\n");
+		printf("# Copy this file to %s/%s to override the built-in defaults.\n",
+				MKFS_XFS_CONF_DIR, MKFS_XFS_DEFAULT_CONFIG);
+	}
 
 	for (i = 0; i < ARRAY_SIZE(confopts_tab); i++, opts++) {
-		if (i > 0)
+		if (manpage)
+			printf(".PP\n.B ");
+		else if (i > 0)
 			printf("\n");
 		printf("[%s]\n", opts->name);
 		submap = opts->subopts;
 		for (j = 0;
 		     j < ARRAY_SIZE(opts->subopts) && submap->suboptname;
 		     j++, submap++) {
+			if (manpage)
+				printf(".br\n.B ");
 			printf("%s = ", submap->suboptname);
 			switch (submap->type) {
 			case FV_BOOL: