108 lines
2.6 KiB
Bash
Executable File
108 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# 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
|
|
bash < /dev/console
|
|
}
|
|
|
|
getarg() {
|
|
local o;
|
|
for o in $(< /proc/cmdline); do
|
|
[[ $o == $1 ]] && { echo $o; break; }
|
|
done
|
|
return 1
|
|
}
|
|
|
|
source_all() {
|
|
local f
|
|
[[ $1 && -d /$1 ]] || return
|
|
for f in "/$1"/*; do [[ -f $f ]] && . "$f"; done
|
|
}
|
|
|
|
echo "Starting initrd..."
|
|
export PATH=/sbin:/bin:/usr/sbin:/usr/bin
|
|
export TERM=linux
|
|
|
|
trap "emergency_shell" 0 2
|
|
# /dev/console comes from the built-in initramfs crud in the kernel
|
|
# someday, we may need to mkdir /dev first here
|
|
exec > /dev/console 2>&1 < /dev/console
|
|
|
|
# mount some important things
|
|
mount -t proc /proc /proc
|
|
mount -t sysfs /sys /sys
|
|
mount -t tmpfs -omode=0755 udev /dev
|
|
|
|
# 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=${root//\//\\x2f}
|
|
root="/dev/disk/by-label/${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"
|
|
[[ -e $root ]] || emergency_shell
|
|
ln -s "$root" /dev/root
|
|
mount -o ro /dev/root $NEWROOT || emergency_shell
|
|
|
|
# now we need to prepare to switchroot
|
|
mount --bind /dev $NEWROOT/dev
|
|
|
|
# FIXME: now for a bunch of boiler-plate mounts. really, we should have
|
|
# some like /etc/fstab.sys that's provided by filesystem/initscripts
|
|
# and then do mount -f /etc/fstab.sys -a
|
|
mount -t proc /proc $NEWROOT/proc
|
|
mount -t sysfs /sys $NEWROOT/sys
|
|
|
|
source_all pre-pivot
|
|
|
|
# kill off udev
|
|
kill $(pidof udevd)
|
|
|
|
# FIXME: nash die die die
|
|
exec switch_root
|
|
# davej doesn't like initrd bugs
|
|
echo "Something went very badly wrong in the initrd. Please "
|
|
echo "file a bug against mkinitrd."
|
|
sleep 100d
|
|
exit 1
|