[PATCH] make partition active

[phcoder <phcoder@gmail.com>]

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Here's the patch to add a replacement for old "makeactive" command
New syntax is
activate PARTITION
E.g.
activate hd0,1

Regards
Vladimir 'phcoder' Serbinenko

[-- Attachment #2: activate.patch --]
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Index: ChangeLog
===================================================================
--- ChangeLog	(revision 1989)
+++ ChangeLog	(working copy)
@@ -1,3 +1,11 @@
+2009-02-11  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	New command: "activate" replacement for makeactive of grub1
+	
+	* commands/i386/pc/activate.c: new file
+	* conf/i386-pc.rmk: new module activate.mod
+	add commands/i386/pc/activate.c to grub-emu sources
+
 2009-02-11  Robert Millan  <rmh@aybabtu.com>
 
 	* util/grub.d/00_header.in: Update old reference to `font' command.
Index: conf/i386-pc.rmk
===================================================================
--- conf/i386-pc.rmk	(revision 1989)
+++ conf/i386-pc.rmk	(working copy)
@@ -145,4 +145,4 @@
 	\
 	disk/raid.c disk/raid5_recover.c disk/raid6_recover.c		\
 	disk/mdraid_linux.c disk/dmraid_nvidia.c disk/lvm.c		\
-	grub_emu_init.c
+	grub_emu_init.c  commands/i386/pc/activate.c

 grub_emu_LDFLAGS = $(LIBCURSES) 
 
 ifeq ($(enable_grub_emu_usb), yes)
@@ -171,3 +170,3 @@
 	vbe.mod vbetest.mod vbeinfo.mod play.mod serial.mod	\
 	ata.mod vga.mod memdisk.mod pci.mod lspci.mod \
 	aout.mod _bsd.mod bsd.mod pxe.mod pxecmd.mod datetime.mod date.mod \
	datehook.mod lsmmap.mod \
-	usb.mod uhci.mod ohci.mod usbtest.mod usbms.mod
+	usb.mod uhci.mod ohci.mod usbtest.mod usbms.mod activate.mod
 
+# For activate.mod.
+activate_mod_SOURCES = commands/i386/pc/activate.c
+activate_mod_CFLAGS = $(COMMON_CFLAGS)
+activate_mod_LDFLAGS = $(COMMON_LDFLAGS)
+
 # For biosdisk.mod.
 biosdisk_mod_SOURCES = disk/i386/pc/biosdisk.c
 biosdisk_mod_CFLAGS = $(COMMON_CFLAGS)
Index: commands/i386/pc/activate.c
===================================================================
--- commands/i386/pc/activate.c	(revision 0)
+++ commands/i386/pc/activate.c	(revision 0)
@@ -0,0 +1,114 @@
+/* activate.c - activate pc partition */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2003  Free Software Foundation, Inc.
+ *  Copyright (C) 2003  NIIBE Yutaka <gniibe@m17n.org>
+ *
+ *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/normal.h>
+#include <grub/pc_partition.h>
+#include <grub/device.h>
+#include <grub/disk.h>
+#include <grub/partition.h>
+
+static grub_err_t
+grub_cmd_activate (struct grub_arg_list *state __attribute__ ((unused)),
+		int argc, char **args)
+{
+
+  grub_device_t dev;
+  struct grub_pc_partition_mbr mbr;
+  grub_partition_t part;
+  
+  int i, index;
+
+  if (argc > 1)
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, "too many arguments");
+
+  if (!argc)
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, "too few arguments");
+
+  dev = grub_device_open (args[0]); 
+
+  if (!dev)
+    return grub_errno;
+
+  if (!dev->disk)
+    {
+      grub_device_close (dev);
+      return grub_error (GRUB_ERR_BAD_ARGUMENT, "not a disk");
+    }
+
+  if (!dev->disk->partition)
+    {
+      grub_device_close (dev);
+      return grub_error (GRUB_ERR_BAD_ARGUMENT, "not a partition");
+    }
+
+  if (grub_strcmp (dev->disk->partition->partmap->name, "pc_partition_map"))
+    {
+      grub_device_close (dev);
+      return grub_error (GRUB_ERR_BAD_ARGUMENT, "not a pc partition");
+    }
+
+  if (dev->disk->partition->offset)
+    {
+      grub_device_close (dev);
+      return grub_error (GRUB_ERR_BAD_ARGUMENT, "not a primary partition");
+    }
+
+  index = dev->disk->partition->index;
+  part = dev->disk->partition;
+  dev->disk->partition = 0;
+
+  /* Read the MBR.  */
+  if (grub_disk_read (dev->disk, 0, 0, sizeof (mbr), (char *) &mbr))
+    {
+      dev->disk->partition = part;
+      grub_device_close (dev);
+      return grub_errno;
+    }
+
+  for (i = 0; i < 4; i++)
+    mbr.entries[i].flag = 0x0;
+
+  mbr.entries[index].flag = 0x80;  
+
+   /* Write the MBR.  */
+  grub_disk_write (dev->disk, 0, 0, sizeof (mbr), (char *) &mbr);
+  dev->disk->partition = part;
+  grub_device_close (dev);
+  return grub_errno;
+  
+}
+
+GRUB_MOD_INIT(activate)
+{
+  (void)mod;			/* To stop warning. */
+  grub_register_command ("activate", grub_cmd_activate, GRUB_COMMAND_FLAG_BOTH,
+			 "activate PARTITION", "set active flag to PARTITION", 0);
+}
+
+GRUB_MOD_FINI(activate)
+{
+  grub_unregister_command ("activate");
+}