#!/bin/bash
# check-cdrom -- udev helper script for QiLinux
# Copyright (C) 2005 Davide Madrisan <davide.madrisan@qilinux.it>
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License version 2 as published by the
# Free Software Foundation.  There is NO warranty; not even for MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE.
#
# Report bugs to <davide.madrisan@qilinux.it>

# NOTE : not enough info in /sys/block/<dev>, so we use /proc
[ -e /proc/sys/dev/cdrom/info ] || exit 1

dev=$1
what=$2

unset vcdrom vwhat

# NOTE: example of /proc/sys/dev/cdrom/info
#   CD-ROM information, Id: cdrom.c 3.20 2003/12/17
#   drive name:             hdd     hdc
#   drive speed:            52      32
#   ...
#   Can play audio:         1       1
#   Can write CD-R:         0       1
#   Can write CD-RW:        0       1
#   Can read DVD:           0       1
#   Can write DVD-R:        0       1
#   Can write DVD-RAM:      0       0
#   ...

/bin/cat /proc/sys/dev/cdrom/info | {
while read line; do
   case "$line" in
   drive\ name:*)
      set ${line##*:}
      vcdrom=($@)

      let "found_dev = 0"
      for cdrom in ${vcdrom[@]}; do
         [ "$cdrom" = "$dev" ] &&
          { let "found_dev = 1"; break; }
      done
      [ "$found_dev" = 1 ] || exit 1
   ;;
   *\ $what:*)
      set ${line##*:}
      for cdrom in ${vcdrom[@]}; do
         [ "$cdrom" = "$dev" -a "$1" = 1 ] && exit 0
         shift
      done
   ;;
   esac
done

exit 1
}