#!/bin/bash
#
# Bacula interface to growisofs, used to write to DVD+/-R(W)
#
#  $Id$
#
#  If you set in your Device resource
#
#  Write Part Command = "path-to-this-script/dvd-writepart %n %a %v"
#    you will have the following input to this script:
#
#  dvd-writepart "erase"  "device"  "part_filename"
#		    $1	     $2 	  $3
#
#  for example:
#
#  dvd-writepart 0 /dev/hda File-0001

MKISOFS=@MKISOFS@
GROWISOFS=@GROWISOFS@

# GROWARGS="-use-the-force-luke=tty -quiet"
GROWARGS="-quiet"

# Uncomment the following line if you do not want the tray to be reloaded
# when writing ends.
GROWARGS="${GROWARGS} -use-the-force-luke=notray"

#### You should probably not modify anything below this line

# If Linux kernel version >=2.6.8, allow a session to start beyond the
# 4gb boundary.
kver=`uname -r | cut -d. -f1,2`
ksubver=`uname -r | cut -d. -f3 | cut -d- -f1`

if test "a$kver" = "a2.6" ; then
   if test "$ksubver" > 7 ; then
      echo "Kernel version >= 2.6.8, allowing to cross the 4gb boundary."
      GROWARGS="${GROWARGS} -use-the-force-luke=4gms"
   fi
fi

if test $# -ne 3 ; then
  echo "usage: dvd-writepart part_number device part_filename"
  echo "  Wrong number of arguments arguments given (!= 3)."
  exit 1
fi

# Setup arguments
erase=$1
dev=$2
filename=$3

if test $erase = 1 ; then
  arg="-Z"
else
  arg="-M"  
fi

# Starts growisofs
echo Running ${GROWISOFS} ${GROWARGS} $arg $dev -R $filename...
${GROWISOFS} ${GROWARGS} $arg $dev -R $filename &
#bash -c "while [ 1 ]; do echo "G"; sleep 1; done" &
growpid=$!
parentpid=$$

# Starts watchdog : checks if the parent is alive. If not, kill
# growisofs.

bash -c "rtn=0; while [ \$rtn = 0 ]; do sleep 5; ps -p $parentpid; rtn=\$?; echo W\$rtn; done; echo \"Parent dead killing $growpid\"; kill $growpid; sleep 5; kill -9 $growpid" &
watchpid=$!

# Waits for growisofs to stop
wait $growpid
rtn=$?

# Kill the watchdog
kill -9 $watchpid

exit $rtn