#!/bin/sh
# initrd generated by:
# $Revision: 12530 $ $Date:: 2012-03-30 14:41:13 +0000 #$

[ -f /proc/cmdline ] || mount -t proc none /proc
# builtin defaults from geninitrd
ROOT=/dev/datavg/rootlv
ROOTFS=reiserfs
read CMDLINE < /proc/cmdline

for arg in $CMDLINE; do
if [ "${arg}" = "debuginitrd" ]; then
DEBUGINITRD=yes
fi
if [ "${arg##debuginitrd=}" != "${arg}" ]; then
DEBUGINITRD=${arg##debuginitrd=}
fi
if [ "${arg##root=}" != "${arg}" ]; then
ROOT=${arg##root=}
fi
if [ "${arg##rootfsflags=}" != "${arg}" ]; then
ROOTFSFLAGS=${arg##rootfsflags=}
fi
if [ "${arg##init=}" != "${arg}" ]; then
INIT=${arg##init=}
fi
done

# make debugshell() invoke subshell if $DEBUGINITRD=sh
if [ "$DEBUGINITRD" = "sh" ]; then
debugshell() {
echo "debug shell disabled by /etc/sysconfig/system: RUN_SULOGIN_ON_ERR setting"
}
else
debugshell() {
:
}
fi

if [ "$DEBUGINITRD" ]; then
set -x
fi
insmod /lib/modules/3.3.2-1/kernel/drivers/scsi/scsi_mod.ko scan=sync
insmod /lib/modules/3.3.2-1/kernel/drivers/ata/libata.ko
insmod /lib/modules/3.3.2-1/kernel/drivers/ata/libahci.ko
insmod /lib/modules/3.3.2-1/kernel/drivers/ata/ahci.ko
insmod /lib/modules/3.3.2-1/kernel/drivers/md/dm-mod.ko
insmod /lib/modules/3.3.2-1/kernel/drivers/md/md-mod.ko
insmod /lib/modules/3.3.2-1/kernel/drivers/md/raid1.ko
insmod /lib/modules/3.3.2-1/kernel/lib/crc-t10dif.ko
insmod /lib/modules/3.3.2-1/kernel/drivers/scsi/sd_mod.ko
insmod /lib/modules/3.3.2-1/kernel/fs/reiserfs/reiserfs.ko
insmod /lib/modules/3.3.2-1/kernel/fs/mbcache.ko
insmod /lib/modules/3.3.2-1/kernel/fs/jbd/jbd.ko
insmod /lib/modules/3.3.2-1/kernel/fs/ext3/ext3.ko
insmod /lib/modules/3.3.2-1/kernel/drivers/scsi/scsi_wait_scan.ko
rmmod scsi_wait_scan
: 'Creating /dev'
if ! mount -t devtmpfs -o mode=0755,nosuid devtmpfs /dev > /dev/null 2>&1; then
mount -o mode=0755,nosuid -t tmpfs tmpfs /dev
mknod /dev/console c 5 1
mknod /dev/null c 1 3
mknod /dev/zero c 1 5
mknod /dev/random c 1 8
mknod /dev/snapshot c 10 231
mknod /dev/urandom c 1 9
mknod /dev/ptmx c 5 2
mknod /dev/kmsg c 1 11
fi
mkdir /dev/pts
mkdir /dev/shm
mount -t sysfs none /sys
mount -t tmpfs run /run
: 'Starting udev'
mkdir /run/udev
/sbin/udevd --daemon
/sbin/udevadm trigger --type=subsystems --action=add
/sbin/udevadm trigger --type=devices --action=add
/sbin/udevadm settle
: 'Making device nodes'
cat /proc/partitions | (
# ignore first two lines: header, empty line
read b; read b

while read major minor blocks dev rest; do
node=/dev/$dev
mkdir -p ${node%/*}
[ -e $node ] || mknod $node b $major $minor
done
)
# if built with blkid change ROOT=LABEL=something into ROOT=/dev/somethingelse -
# parsed by blkid
if [ "${ROOT##LABEL=}" != "${ROOT}" -o "${ROOT##UUID=}" != "${ROOT}" ]; then
ROOT="$(/bin/blkid -t $ROOT -o device -l)"
fi
mdassemble

if [ "" ]; then
[ -e /proc/mdstat ] && echo "/proc/mdstat contents:" && cat /proc/mdstat
fi
cat /etc/lvm.conf > /tmp/lvm.conf
ROOTDEV=/dev/datavg/rootlv
LVM_ROOTVG="datavg"
LVM_SUSPENDVG=""
# parse rootdev from kernel commandline if it begins with /
case "$ROOT" in
/*)

# rewrite:
        # /dev/mapper/sys-rootfs -> /dev/sys/rootfs
# /dev/mapper/blodnatt-blah--bleh -> /dev/blodnatt/blah-bleh
# /dev/mapper/vg--meaw-root -> /dev/vg-meaw/root
case "$ROOT" in
/dev/mapper/*-*)
# change "--" to / (as "/" is impossible in LV name)
local dev=$(awk -vdev="${ROOT#/dev/mapper/}" 'BEGIN{gsub(/--/, "/", dev); print dev}')
local VG=$(awk -vdev="$dev" 'BEGIN{split(dev, v, "-"); gsub("/", "-", v[1]); print v[1]}')
local LV=$(awk -vdev="$dev" 'BEGIN{split(dev, v, "-"); gsub("/", "-", v[2]); print v[2]}')
ROOT=/dev/$VG/$LV
;;
esac

if [ "$ROOT" != "$ROOTDEV" ]; then
ROOTDEV=$ROOT

echo "LVM: Using 'root=$ROOTDEV' from kernel commandline"
local tmp=${ROOTDEV#/dev/}
if [ "$tmp" != "$ROOTDEV" ]; then
LVM_ROOTVG=${tmp%/*}
echo "LVM: Using Volume Group '$LVM_ROOTVG' for rootfs"
fi
fi
;;
esac

# skip duplicate VG
if [ "$LVM_SUSPENDVG" = "$LVM_ROOTVG" ]; then
LVM_VGVOLUMES="$LVM_ROOTVG"
else
LVM_VGVOLUMES="$LVM_SUSPENDVG $LVM_ROOTVG"
fi

# disable noise from LVM accessing devices that aren't ready.
read printk < /proc/sys/kernel/printk
if [ ! "$DEBUGINITRD" ]; then
echo 0 > /proc/sys/kernel/printk
fi

export LVM_SYSTEM_DIR=/tmp
: 'Scanning for Volume Groups'
lvm.static vgscan --mknodes --ignorelockingfailure 2>/dev/null

: 'Activating Volume Groups'
for vol in $LVM_VGVOLUMES; do
lvm.static vgchange --ignorelockingfailure -a y $vol 2>/dev/null
done

echo "$printk" > /proc/sys/kernel/printk

# Find out major/minor
attrs="$(lvm.static lvdisplay --ignorelockingfailure -c $ROOTDEV 2>/dev/null)"
if [ "$attrs" ]; then
majmin="${attrs#*$ROOTDEV*:*:*:*:*:*:*:*:*:*:*:*}"
if [ "$majmin" != "$attrs" ]; then
major="${majmin%:*}"
minor="${majmin#*:}"
fi
fi

if [ "$major" -a "$minor" ]; then
# Pass it to kernel
echo $((256 * $major + $minor)) > /proc/sys/kernel/real-root-dev
fi

unset LVM_SYSTEM_DIR
if [ "${ROOT##/dev/}" != "${ROOT}" ]; then
rootnr="$(busybox awk -v rootnode="${ROOT##/dev/}" '$4 == rootnode { print 256 * $1 + $2 }' /proc/partitions)"
# fallback to ls
if [ -z "$rootnr" ]; then
rootnr="$(busybox ls -lL ${ROOT} | busybox awk '{if (/^b/) { print 256 * $3 + $4; }}')"
fi
if [ -n "$rootnr" ]; then
echo "$rootnr" > /proc/sys/kernel/real-root-dev
fi
fi
/sbin/udevadm control --exit
/sbin/udevadm info --cleanup-db
ifs=$IFS
IFS="
"
for i in $(export -p); do
i=${i#declare -x } # ksh/bash
i=${i#export } # busybox

case "$i" in
*=*)
: ;;
*)
continue ;;
esac

i=${i%%=*}

[ -z "$i" ] && continue

case "$i" in
ROOT|PATH|HOME|TERM)
:
;;
*)
unset $i
;;
esac
done
IFS=$ifs
device=
eval "$(busybox awk -v c="$ROOT" '
BEGIN {
num_pattern_short = "[0-9a-f][0-9a-f][0-9a-f]";
num_pattern = "[0-9a-f]" num_pattern_short;
dev_pattern = "[hms][a-z][a-z]([0-9])+";
partition = "";
min = -1; maj = -1;

sub("^0x", "", c);
if (c ~ "^" num_pattern_short "$") sub("^", "0", c);
if (c ~ "^" num_pattern  "$") {
maj = sprintf("%d",substr(c,1,2));
min = sprintf("%d",substr(c,3));
}
if (c ~ "^\/dev\/" dev_pattern "$") sub("^/dev/","", c);
if (c ~ "^" dev_pattern "$") partition = c;
}

partition && $4 == partition { maj = $1; min = $2; }
$1 == maj && $2 == min { partition = $4; }

END {
if (maj >= 0 && min >= 0) {
printf("maj=%s; min=%s;\n", maj, min);
}
if (partition) {
printf("device=/dev/%s;\n", partition);
}
}
' /proc/partitions)"

if [ -z "$device" ]; then
device=$ROOT
fi

if [ "$device" -a ! -b $device ]; then
mknod $device b $maj $min
fi

[ -n "$ROOTFSFLAGS" ] && ROOTFSFLAGS="-o $ROOTFSFLAGS"

mount -t $ROOTFS -r $device $ROOTFSFLAGS /newroot || echo "Mount of rootfs failed."
init=$INIT
if [ -z "$init" -o ! -x "/newroot$init" ]; then
init=/sbin/init
fi
: Last shell before umounting all and giving control over to real init.
debugshell
mount --bind /run /newroot/run
umount /run
umount /dev
umount /sys
umount /proc
[ ! -e /newroot/dev/console ] && mknod -m 660 /newroot/dev/console c 5 1
exec switch_root /newroot $init ${1:+"$@"}

echo "Error! initramfs should not reach this place."
echo "It probably means you've got old version of busybox, with broken"
echo "initramfs support. Trying to boot anyway, but won't promise anything."

exec chroot /newroot $init ${1:+"$@"}

echo "Failed to chroot!"
debugshell