From c96e173c287dcbce1813420940e79900f030c467 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 3 Mar 2007 22:32:13 +0000
Subject: [PATCH] add failsafe support for x86-2.6 and fix mdev support for
 platforms using /etc/preinit

SVN-Revision: 6481
---
 package/base-files/Makefile                   |  1 -
 package/base-files/files/etc/preinit          |  3 +-
 package/base-files/files/sbin/mount_root      | 33 ++++++++++++-------
 .../base-files/default/etc/preinit.arch       |  2 ++
 target/linux/x86-2.6/image/grub/menu.lst      |  4 +++
 5 files changed, 30 insertions(+), 13 deletions(-)
 create mode 100644 target/linux/x86-2.6/base-files/default/etc/preinit.arch

diff --git a/package/base-files/Makefile b/package/base-files/Makefile
index f02f1c9aa3..30e90453ee 100644
--- a/package/base-files/Makefile
+++ b/package/base-files/Makefile
@@ -19,7 +19,6 @@ REV:=$(shell LANG=C svn info | awk '/^Revision:/ { print$$2 }' )
 ifeq ($(REV),)
   REV:=0
 endif
-
 include $(INCLUDE_DIR)/package.mk
 
 ifneq ($(DUMP),1)
diff --git a/package/base-files/files/etc/preinit b/package/base-files/files/etc/preinit
index 74d4e88892..c60a0f850f 100755
--- a/package/base-files/files/etc/preinit
+++ b/package/base-files/files/etc/preinit
@@ -1,5 +1,6 @@
 #!/bin/sh
 # Copyright (C) 2006 OpenWrt.org
 export PATH=/bin:/sbin:/usr/bin:/usr/sbin
-mount_root
+[ -e /etc/preinit.arch ] && . /etc/preinit.arch
+mount_root ${FAILSAFE:+failsafe}
 exec /sbin/init
diff --git a/package/base-files/files/sbin/mount_root b/package/base-files/files/sbin/mount_root
index 607877c643..4fa048f43a 100755
--- a/package/base-files/files/sbin/mount_root
+++ b/package/base-files/files/sbin/mount_root
@@ -5,17 +5,28 @@
 mount none /proc -t proc
 size=$(awk '/Mem:/ {l=5242880;print((s=$2/2)<l)?$2-l:s}' /proc/meminfo)
 mount none /tmp -t tmpfs -o size=$size,nosuid,nodev,mode=1777
-
-grep rootfs /proc/mtd >/dev/null 2>/dev/null && {
-	mtd unlock rootfs
-	grep rootfs_data /proc/mtd >/dev/null 2>/dev/null && {
-		. /bin/firstboot
-		echo "switching to jffs2"
-		mount "$(find_mtd_part rootfs_data)" /jffs -t jffs2
-		fopivot /jffs /rom
-	}
-} || mount -o remount,rw /dev/root /
-
+if grep devfs /proc/filesystems > /dev/null; then
+	mount none /dev -t devfs
+else
+	mount -t sysfs none /sys
+	mount -t tmpfs tmpfs /dev -o size=512K
+	mknod /dev/console c 5 1
+	mkdir /dev/shm
+	/sbin/mdev -s
+fi
 mkdir -p /dev/pts
 mount none /dev/pts -t devpts
+
+[ failsafe != "$1" ] && {
+	grep rootfs /proc/mtd >/dev/null 2>/dev/null && {
+		mtd unlock rootfs
+		grep rootfs_data /proc/mtd >/dev/null 2>/dev/null && {
+			. /bin/firstboot
+			echo "switching to jffs2"
+			mount "$(find_mtd_part rootfs_data)" /jffs -t jffs2
+			fopivot /jffs /rom
+		}
+	} || mount -o remount,rw /dev/root /
+}
+
 grep sysfs /proc/filesystems >/dev/null && mount -t sysfs none /sys 2>&-
diff --git a/target/linux/x86-2.6/base-files/default/etc/preinit.arch b/target/linux/x86-2.6/base-files/default/etc/preinit.arch
new file mode 100644
index 0000000000..f29f0d448b
--- /dev/null
+++ b/target/linux/x86-2.6/base-files/default/etc/preinit.arch
@@ -0,0 +1,2 @@
+mount -t proc none /proc
+grep 'failsafe=' /proc/cmdline && export FAILSAFE=true
diff --git a/target/linux/x86-2.6/image/grub/menu.lst b/target/linux/x86-2.6/image/grub/menu.lst
index 590a7d5e3a..f9d28438f8 100644
--- a/target/linux/x86-2.6/image/grub/menu.lst
+++ b/target/linux/x86-2.6/image/grub/menu.lst
@@ -9,3 +9,7 @@ root    (hd0,0)
 kernel  /boot/vmlinuz @CMDLINE@ noinitrd console=ttyS0,@BAUDRATE@n8 reboot=bios
 boot
 
+title	OpenWrt (failsafe)
+root	(hd0,0)
+kernel  /boot/vmlinuz failsafe=true @CMDLINE@ noinitrd console=ttyS0,@BAUDRATE@n8 reboot=bios
+boot