#!/bin/sh

OPT=$(getopt -n "$0" -o er -l i-really-mean-it,erase-backups -- "$@")
if [ $? != 0 ]; then
  echo "getopt failed"
  exit 1
fi
eval set -- "$OPT"

ireallymeanit=0
erasebackups=0
while true; do
  case "$1" in
    -r|--i-really-mean-it ) ireallymeanit=1 ;;
    -e|--erase-backups ) erasebackups=1 ;;
    -- ) shift; break ;;
    * ) echo "***Illegal option: $1" >&2; exit 1 ;;
  esac
  shift
done

if [ $ireallymeanit -eq 0 ]; then
  echo
  echo "                       *    *    *"
  echo "THIS PROGRAM WILL WIPE ALL DATA IN THE FLASH PARTITIONS!"
  echo "                       *    *    *"
  echo
  echo -n "Are you sure (y/n)? "
  read yesno
  [ "$yesno" = "y" ] || exit 1
  echo
  ireallymeanit=1
fi

check_mtd()
{
  local a b c d e
  cat /proc/mtd |
  while read a b c d; do
    # convert 'mtdxx:' to 'xx'
    e=${a%:*}
    [ $d = $1 ] && echo "${e#mtd}"
  done
}

leds 0 15 0 15 0 15  # noisy leds as we wipe things

# try to umount what we can
sleep 5
(
lsof | grep /config
) | sed -e 's/^/BUSY: /'
umount -f /config

mtd_no=$(check_mtd '"config"')
device=/dev/mtd$mtd_no
echo "formating '$device' for jffs2 from factory reset cmd"
flash_erase --jffs $device 0 0

leds 0  # done

echo "Rebooting in 10 seconds..."
sleep 10
reboot