#!/bin/sh
PATH=/usr/bin:/usr/sbin
export PATH

problem()
{
   printf "No root-device given!\n\nStarting SETUP.\n\n"
   /usr/sbin/gixsetup 
}

no_device()
{
   printf "The device %s, which is supposed to contain the\n" $1
   printf "root file system, does not exist.\n"
   printf "Please fix this problem and exit this shell.\n\n"
}

no_mount()
{
   printf "Could not mount device %s\n" $1
   printf "Sleeping forever. Please reboot and fix the kernel command line.\n\n"
   printf "Maybe the device is formatted with an unsupported file system?\n\n"
   printf "Or maybe filesystem type autodetection went wrong, in which case\n"
   printf "you should add the rootfstype=... parameter to the kernel command line.\n\n"
   printf "Available partitions:\n"
}

do_mount_root()
{
   mkdir /.root
   [ -n "$rootflags" ] && rootflags="$rootflags,"
   rootflags="$rootflags$ro"

   case "$root" in
      /dev/*    ) device=$root ;;
      UUID=*    ) eval $root; device="/dev/disk/by-uuid/$UUID" ;;
      PARTUUID=*) eval $root; device="/dev/disk/by-partuuid/$PARTUUID" ;;
      LABEL=*   ) eval $root; device="/dev/disk/by-label/$LABEL" ;;
      ""        ) echo "No root device specified." ; problem ;;
   esac

   while [ ! -b "$device" ] ; do
       no_device $device
       problem
   done

   if ! mount -n -t "$rootfstype" -o "$rootflags" "$device" /.root ; then
       no_mount $device
       cat /proc/partitions
       while true ; do sleep 10000 ; done
   else
       ln  $device /dev/root
       echo "Successfully mounted /.root to device $root"
   fi
}

do_try_resume()
{
   case "$resume" in
      UUID=* ) eval $resume; resume="/dev/disk/by-uuid/$UUID"  ;;
      LABEL=*) eval $resume; resume="/dev/disk/by-label/$LABEL" ;;
   esac

   if $noresume || ! [ -b "$resume" ]; then return; fi

   ls -lH "$resume" | ( read x x x x maj min x
       echo -n ${maj%,}:$min > /sys/power/resume )
}

init=/sbin/init
root=
rootdelay=
rootfstype=auto
ro="ro"
rootflags=
device=
resume=
noresume=false



mount -n -t devtmpfs devtmpfs /dev
mount -n -t proc     proc     /proc
mount -n -t sysfs    sysfs    /sys
mount -n -t tmpfs    tmpfs    /run
mount -n -t efivarfs    efivarfs    /sys/firmware/efi/efivars


read -r cmdline < /proc/cmdline

for param in $cmdline ; do
  case $param in
    init=*      ) init=${param#init=}             ;;
    root=*      ) root=${param#root=}             ;;
    rootdelay=* ) rootdelay=${param#rootdelay=}   ;;
    rootfstype=*) rootfstype=${param#rootfstype=} ;;
    rootflags=* ) rootflags=${param#rootflags=}   ;;
    resume=*    ) resume=${param#resume=}         ;;
    noresume    ) noresume=true                   ;;
    ro          ) ro="ro"                         ;;
    rw          ) ro="rw"                         ;;
  esac
done

# udevd location depends on version
if [ -x /sbin/udevd ]; then
  UDEVD=/sbin/udevd
elif [ -x /lib/udev/udevd ]; then
  UDEVD=/lib/udev/udevd
elif [ -x /lib/systemd/systemd-udevd ]; then
  UDEVD=/lib/systemd/systemd-udevd
else
  echo "Cannot find udevd nor systemd-udevd"
  problem
fi

${UDEVD} --daemon --resolve-names=never
udevadm trigger
udevadm settle

echo -n Searching for raid started
sleep 1
echo -n .
sleep 1
echo -n .
sleep 1
echo -n .
sleep 1
echo  .

/sbin/mdadm -E -s > /etc/mdadm.conf
/sbin/mdadm -S -s
/sbin/mdadm -A -s
cat /proc/mdstat
echo -n MDADM started
sleep 1
echo -n .
sleep 1
echo -n .
sleep 1
echo -n .
sleep 1
echo -n .
sleep 1
echo  .
echo Trying to mount root or going to setup
# if [ -f /etc/mdadm.conf ] ; then mdadm -As                       ; fi
# if [ -x /sbin/vgchange  ] ; then /sbin/vgchange -a y > /dev/null ; fi
# if [ -n "$rootdelay"    ] ; then sleep "$rootdelay"              ; fi

do_try_resume # This function will not return if resuming from disk
do_mount_root

killall -w ${UDEVD##*/}

exec switch_root /.root "$init" "$@"