#!/bin/busybox sh

rescue_shell() {
    echo "$@"
    echo "Something went wrong. Dropping you to a shell."
# have time to read the message
    /bin/sleep 20 
    /bin/busybox --install -s
    exec /bin/sh
}

# allow the use of UUIDs or filesystem lables
uuidlabel_root() {
    for cmd in $(/bin/cat /proc/cmdline) ; do
        case $cmd in
        root=*)
            type=$(echo $cmd | /bin/cut -d= -f2)
echo $type            
	    echo "Mounting rootfs"
            if [ $type == "LABEL" ] || [ $type == "UUID" ] ; then
                uuid=$(echo $cmd | /bin/cut -d= -f3)
                /bin/mount -o ro $(/bin/findfs "$type"="$uuid") /mnt/root
            else
                /bin/mount -o ro $(echo $cmd | /bin/cut -d= -f2) /mnt/root
            fi
#echo "Root contains"
#ls -l /mnt/root
#/bin/sleep 20
            ;;
        esac
    done
}

check_filesystem() {
    # most of code coming from /etc/init.d/fsck

    local fsck_opts= check_extra= RC_UNAME=$(uname -s)

    # FIXME : get_bootparam forcefsck
    if [ -e /forcefsck ]; then
        fsck_opts="$fsck_opts -f"
        check_extra="(check forced)"
    fi

    echo "Checking local filesystem $check_extra : $1"
#/bin/sleep 20
    if [ "$RC_UNAME" = Linux ]; then
        fsck_opts="$fsck_opts -C0 -T"
    fi

    trap : INT QUIT

    # using our own fsck, not the builtin one from busybox
    /sbin/fsck -p $fsck_opts $1

    ret_val=$?
    case $ret_val in
        0)      return 0;;
        1)      echo "Filesystem repaired"; return 0;;
        2|3)    if [ "$RC_UNAME" = Linux ]; then
                        echo "Filesystem repaired, but reboot needed"
                        reboot -f
                else
                        rescue_shell "Filesystem still have errors; manual fsck required"
                fi;;
        4)      if [ "$RC_UNAME" = Linux ]; then
                        rescue_shell "Fileystem errors left uncorrected, aborting"
                else
                        echo "Filesystem repaired, but reboot needed"
                        reboot -f
                fi;;
        8)      echo "Operational error"; return 0;;
	16)	echo "Use or Syntax Error"; return 16;;
        32)     echo "fsck interrupted";;
	127)	echo "Shared Library Error"; sleep 20; return 0;;
        *)      echo $ret_val; echo "Some random fsck error - continuing anyway"; sleep 20; return 0;;
    esac

# rescue_shell can't find tty so its broken
    rescue_shell
}

# start for real here
# temporarily mount proc and sys

PATH=/sbin:/bin
export PATH

#echo "/bin"
#/bin/ls -l /bin
#echo "/sbin"
#/bin/ls -l /sbin

#/bin/sleep 20


#echo "Mount proc"
/bin/mount -t proc proc /proc
#/bin/busybox sleep 20

#echo "Mount sysfs"
/bin/mount -t sysfs sysfs /sys

#/bin/ls /dev

#/bin/sleep 20

# Don't be silly - /dev is static and its on /
# echo "Mount /dev"
# /bin/busybox mount -t devtmpfs none /dev
# /bin/busybox sleep 20
# /bin/busybox ls /dev
# /bin/busybox sleep 20

# disable kernel messages from popping onto the screen
###echo 0 > /proc/sys/kernel/printk
# clear the screen
###clear

# assemble the raid set(s) - they got renumbered from md1, md5 and md6
#/dev/sda1: UUID="9392926d-6408-6e7a-8663-82834138a597" TYPE="linux_raid_member" PARTUUID="0553caf4-01" 
#/dev/sda2: UUID="b6633d8e-41ef-4485-9bbe-c4c2d69f4e8c" TYPE="swap" PARTUUID="0553caf4-02" 
#/dev/sda5: UUID="5e3cadd4-cfd2-665d-9690-1ac76d8f5a5d" TYPE="linux_raid_member" PARTUUID="0553caf4-05" 
#/dev/sda6: UUID="9657e667-5b60-f6a3-0391-65e6dcf662fa" TYPE="linux_raid_member" PARTUUID="0553caf4-06" 

# not needed on SSD but we may want to maintain it
# spinney /boot
/sbin/mdadm --assemble /dev/md125 --uuid=9392926d-6408-6e7a-8663-82834138a597 
# /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
# don't care if /boot fails to assemble

# not needed on SSD, so don't fail for not assembling spinney root
# /  (root)  I wimped out of root on lvm for this box
/sbin/mdadm --assemble /dev/md126 --uuid=5e3cadd4-cfd2-665d-9690-1ac76d8f5a5d
# /dev/sda5 /dev/sdb5 /dev/sdc5 /dev/sdd5 || rescue_shell "Root Assembly Failed"

# LVM for everything else
# /home and everything portge related
/sbin/mdadm --assemble /dev/md127 --uuid=9657e667-5b60-f6a3-0391-65e6dcf662fa 
#/dev/sda6 /dev/sdb6 /dev/sdc6 /dev/sdd6 || rescue_shell "LVM Assembly Failed"

# and if the LVM space won't assemble there is no /usr or /var so we are really in a mess
# TODO could auto cope with degraded raid operation

# start the vg volume group - /home and everything for portage - need not die here
/sbin/vgchange -ay vg || rescue_shell "lvchange vg failed"

## WARNING Order is important!!! or the /dev/dm-x devices come up in the wrong places.
# if this failed we have no, / /usr or /var
# everything on the SDD
/sbin/vgchange -ay static || rescue_shell "lvchange static failed"

# get here with raid sets assembled and logical volumes available

# mounting rootfs on /mnt/root
uuidlabel_root || rescue_shell "Error with uuidlabel_root"

# space separated list of mountpoints that ...
mountpoints="/usr /var"

# ... we want to find in /etc/fstab ...
/bin/ln -s /mnt/root/etc/fstab /etc/fstab

#/bin/ls -l /etc
#/bin/ls -l /mnt/root 
#/bin/sleep 20

# ... to check filesystems and mount our devices.
for m in $mountpoints ; do

#echo $m
#/bin/sleep 20
    check_filesystem $m

    echo "Mounting $m"
    # mount the device and ...
    /bin/mount $m || rescue_shell "Error while mounting $m"

    # ... move the tree to its final location
    /bin/mount --move $m "/mnt/root"$m || rescue_shell "Error while moving $m"
done

echo "All done. Switching to real root."

# clean up. The init process will remount proc sys and dev later
/bin/umount /proc
/bin/umount /sys

# we don't have a /dev to umount

# switch to the real root and execute init
exec /sbin/switch_root /mnt/root /sbin/init