From 65381749c8ed7afb60bc75a4e3e28ee534fbc56b Mon Sep 17 00:00:00 2001
From: Harald Hoyer <harald-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Date: Wed, 4 Mar 2009 13:45:21 +0100
Subject: [PATCH] strip "init=" from INIT

---
 init | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100755 init

diff --git a/init b/init
new file mode 100755
index 0000000000..96051410c4
--- /dev/null
+++ b/init
@@ -0,0 +1,112 @@
+#!/bin/sh
+#
+# Licensed under the GPLv2
+#
+# Copyright 2008, Red Hat, Inc.
+# Jeremy Katz <katzj@redhat.com>
+
+emergency_shell()
+{
+    echo ; echo
+    echo "Bug in initramfs /init detected. Dropping to a shell. Good luck!"
+    echo
+    sh -i
+}
+
+getarg() {
+    local o line
+    for o in $CMDLINE; do
+	[ "${o%%=*}" = "$1" ] && { echo $o; return 0; }
+    done
+    return 1
+}
+
+source_all() {
+    local f
+    [ "$1" ] && [  -d "/$1" ] || return
+    for f in "/$1"/*.sh; do [ -f "$f" ] && . "$f"; done
+}
+
+echo "Starting initrd..."
+export PATH=/sbin:/bin:/usr/sbin:/usr/bin
+export TERM=linux
+CONSOLE=/dev/console
+[ -c $CONSOLE ] && exec >$CONSOLE 2>&1 <$CONSOLE
+trap "emergency_shell" 0
+# mount some important things
+mount -t proc /proc /proc
+mount -t sysfs /sys /sys
+mount -t tmpfs -omode=0755 udev /dev
+read CMDLINE </proc/cmdline;
+
+
+# FIXME: what device nodes does plymouth really _need_ ?
+mknod /dev/ptmx c 5 2
+mknod /dev/console c 5 0
+mknod /dev/fb c 29 0
+mkdir /dev/pts
+mount -t devpts -o gid=5,mode=620 /dev/pts /dev/pts
+mknod /dev/tty0 c 4 0
+mknod /dev/tty1 c 4 1
+mknod /dev/null c 1 3
+
+source_all pre-udev
+
+# start up udev and trigger cold plugs
+udevd --daemon
+udevadm trigger >/dev/null 2>&1
+
+# mount the rootfs
+NEWROOT="/sysroot"
+
+# FIXME: there's got to be a better way ...
+# it'd be nice if we had a udev rule that just did all of the bits for
+# figuring out what the specified root is and linking it /dev/root
+root=$(getarg root); root=${root#root=}
+case $root in
+    LABEL=*) root=${root#LABEL=}
+             root="$(echo $root |sed 's,/,\\x2f,g')"
+	     root="/dev/disk/by-label/${root}" ;;
+    UUID=*) root="/dev/disk/by-uuid/${root#UUID=}" ;;
+    '') echo "Warning: no root specified"
+	root="/dev/sda1" ;;
+esac
+
+# should we have a timeout?
+tries=0
+echo "Waiting up to 30 seconds for $root to become available"
+udevadm settle --timeout=30
+source_all pre-mount
+
+echo "Trying to mount rootfs $root"
+if rflags="$(getarg rootflags)"; then
+    rflags="${rflags#rootflags=}"
+    getarg rw >/dev/null && rflags="${rflags},rw" || rflags="${rflags},ro"
+else
+     getarg rw >/dev/null && rflags=rw || rflags=ro
+fi
+[ -e "$root" ] || emergency_shell
+ln -s "$root" /dev/root 
+fstype="$(getarg rootfstype)" && fstype="-t ${fstype#rootfstype=}" 
+mount $fstype -o $rflags /dev/root $NEWROOT || emergency_shell
+
+INIT=$(getarg init); INIT=${INIT#init=}
+[ "$INIT" ] || {
+    for i in /sbin/init /etc/init /init /bin/sh; do
+	[ -x "$NEWROOT$i" ] && { INIT="$i"; break; }
+    done
+    [ "$INIT" ] || {
+	echo "Cannot find init! Please check to make sure you passed"
+	echo "a valid root filesystem!  Dropping to a shell."
+	emergency_shell
+    }
+}
+	    
+source_all pre-pivot
+echo "Switching to real root filesystem $root"
+exec switch_root "$NEWROOT" "$INIT"  $CMDLINE || {
+    # davej doesn't like initrd bugs
+    echo "Something went very badly wrong in the initrd.  Please "
+    echo "file a bug against mkinitrd."
+    emergency_shell
+}