#!/bin/busybox ash
# Install busybox's applets as symlinks
/bin/busybox --install -s

. /init_functions

msg ":: Loading Initramfs"
/bin/mount -t proc proc /proc
/bin/mount -t sysfs sys /sys

read CMDLINE </proc/cmdline
export CMDLINE

export root=""
export init=""
echo "/sbin/modprobe" > /proc/sys/kernel/modprobe

# if available, start udevd at this stage
if [ -x /sbin/udevd ]; then
    msg ":: Starting udevd..."
    echo > /proc/sys/kernel/hotplug
    /sbin/udevd --daemon
    msg "done."
fi

for cmd in ${CMDLINE}; do
    case "${cmd}" in
        \#*) break ;; # ignore everything after a # in the commandline
        # The kernel passes those to the kernel on its own
        [0123456Ss]) ;;
        [0-9]*) ;;
        single) ;;
        # only export stuff that does work with ash :)
        *=*) rhs="$(echo "${cmd}" | cut -d= -f2-)"
             cmd="$(echo "${cmd}" | cut -d= -f1 | sed 's|\.|_|g')"
             cmd="$(echo "${cmd}" | sed 's|-|_|g')=${rhs}"
             (echo "${cmd}" | grep -qe '^[0-9]') || export "${cmd}"
             ;;
        *)   cmd="$(echo "${cmd}" | sed 's|\.|_|g')"
             cmd="$(echo "${cmd}" | sed 's|-|_|g')"
             (echo "${cmd}" | grep -qe '^[0-9]') || export "${cmd}=y"
             ;;
    esac
done

if [ -n "${disablehooks}" ]; then
    for d in $(echo "${disablehooks}" | sed 's|,| |g'); do
        export "hook_${d}=disabled"
    done
fi

if [ -n "${disablemodules}" ]; then
    for d in $(echo "${disablemodules}" | sed 's|,| |g'); do
        export "mod_${d}=disabled"
    done
fi

if [ -n "${earlymodules}" ]; then
    for m in $(echo "${earlymodules}" | sed 's|,| |g'); do
        /sbin/modprobe -q ${m} > /dev/null 2>&1
    done
fi

. /config

for m in ${MODULES}; do
    TST=""
    eval "TST=\$mod_${m}"
    if [ "${TST}" != "disabled" ]; then
        /sbin/modprobe -q ${m} > /dev/null 2>&1
    fi
done

# If rootdelay is empty or not a non-negative integer, set it to 10
if [ -z "${rootdelay}" ] || ! [ "${rootdelay}" -ge 0 ]; then
    export rootdelay=10
fi

if [ -e "/hooks" ]; then
    for h in ${HOOKS}; do
        TST=""
        eval "TST=\$hook_${h}"
        if [ "${TST}" != "disabled" ]; then
            run_hook () { msg "${h}: no run function defined"; }
            if [ -e "/hooks/${h}" ]; then
               . /hooks/${h}
               msg ":: Running Hook [${h}]"
               run_hook
            fi
        fi
    done
fi

if [ "${break}" = "y" ]; then
    echo ":: Break requested, type 'exit' to resume operation"
    launch_interactive_shell
fi

if [ -f "/message" ]; then
    msg "$(cat /message)"
fi

#Special handling if udev is running
udevpid=$(/bin/pidof udevd)
if [ -n "${udevpid}" ]; then
    # Settle pending uevents, then kill udev
    /sbin/udevadm settle
    /bin/kill -9 ${udevpid} > /dev/null 2>&1
    /bin/sleep 0.01
fi

mkdir -p /new_root
if [ -z "${nfsroot}" -a "${root}" != "/dev/nfs" ]; then
  if [ ${root:0:5} != "/dev/" ] || ! poll_device "${root}" ${rootdelay}; then
    msg "\nRoot device '${root}' doesn't exist. Attempting to create it."
    rootdev=""
    if [ ${root:0:5} = "/dev/" ]; then
      # It might be a block device (/dev/sda)
      if [ -f /sys/block/${root:5}/dev ]; then
        rootdev="$(cat /sys/block/${root:5}/dev | sed 's|:| |')"
      # It might be a partition on any block device (/dev/sda1)
      else
        for dir in /sys/block/*; do
          if [ -f ${dir}/${root:5}/dev ]; then
            rootdev="$(cat /sys/block/${dir}/${root:5}/dev | sed 's|:| |')"
            break
          fi
        done
      fi
    # It might be a major/minor pair (8:1)
    elif echo ${root} | grep -q :; then
      rootdev="$(echo ${root} | sed 's|:| |')"
      root="/dev/root"
    # It might be major/minor encoded as a single hex-number (lilo-style) (801)
    elif [ ${#root} -le 4 -a ${#root} -gt 2 ] && echo "${root}" | grep -qe '^[A-Fa-f0-9]*$'; then
      str_offset=$((${#root}-2))
      major=$(printf "%d" 0x${root:0:${str_offset}})
      minor=$(printf "%d" 0x${root:${str_offset}})
      rootdev="${major} ${minor}"
      root="/dev/root"
    fi
    if [ -n "${rootdev}" ]; then
      msg "Creating root device ${root} with major $(echo "${rootdev}" | cut -d\   -f1) and minor $(echo "${rootdev}" | cut -d\   -f2)."
      mknod ${root} b ${rootdev}
    else
      err "Unable to determine major/minor number of root device '${root}'."
      echo "You are being dropped to a recovery shell"
      echo "    Type 'reboot' to reboot"
      echo "    Type 'exit' to try and continue booting"
      launch_interactive_shell
      msg "Trying to continue (this will most likely fail) ..."
    fi
  fi
  # We didn't build filesystem support into busybox,
  # instead we use util-linux-ng's blkid for best compatibility
  if [ -n "${rootfstype}" ]; then
    fstype="${rootfstype}"
  else
    fstype=$(eval $(/sbin/blkid -o udev -p "${root}"); echo $ID_FS_TYPE)
  fi
  mount ${fstype:+-t ${fstype}} -o ro "${root}" /new_root
else
  # TODO: Actually implement this
  err "Mounting NFS root is not implemented yet."
fi
umount /proc
umount /sys
[ -z "${init}" ] && init="/sbin/init"
exec /sbin/switch_root -c /dev/console /new_root ${init} "$@"