#!/bin/bash
#
# This file is required for the proper handling of failures of LVM2 mirror
# devices that were created using the -m option of lvcreate.
#
# chkconfig: 12345 02 99
# description: Starts and stops dmeventd monitoring for lvm2
### BEGIN INIT INFO
# Provides: lvm2-monitor
# Required-Start: $local_fs
# Required-Stop: $local_fs
# Default-Start: 1 2 3 4 5
# Default-Stop: 0 6
# Short-Description: Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progress polling
### END INIT INFO

WITHOUT_RC_COMPAT=1

. /etc/init.d/functions

DAEMON=lvm2-monitor

VGCHANGE=/sbin/vgchange
VGS=/sbin/vgs

LOCKFILE="/var/lock/subsys/$DAEMON"
RETVAL=0
WARN=1

start()
{
	# TODO do we want to separate out already active groups only?
	VGSLIST=`$VGS --noheadings -o name 2> /dev/null`
	for vg in $VGSLIST
	do
	    action "Starting monitoring for VG $vg:" $VGCHANGE --monitor y $vg || RETVAL=$?
	done
	return $RETVAL
}


stop()
{
	# TODO do we want to separate out already active groups only?
	if test "$WARN" = "1"; then
	   echo "Not stopping monitoring, this is a dangerous operation. Please use force-stop to override."
	   return 1
	fi
	VGSLIST=`$VGS --noheadings -o name 2> /dev/null`
	for vg in $VGSLIST
	do
	    action "Stopping monitoring for VG $vg:" $VGCHANGE --monitor n $vg || RETVAL=$?
	done
	return $RETVAL
}

restart()
{
    stop
    start
}

# See how we were called.
case "$1" in
  start)
	start
	RETVAL=$?
	[ $RETVAL = 0 ] && touch $LOCKFILE
	;;
  force-stop)
	WARN=0
	stop
	RETVAL=$?
	[ $RETVAL = 0 ] && rm -f $LOCKFILE
	;;
  stop)
	test "$runlevel" = "0" && WARN=0
	test "$runlevel" = "6" && WARN=0
	stop
	RETVAL=$?
	[ $RETVAL = 0 ] && rm -f $LOCKFILE
	;;
  restart|reload)
	WARN=0
	restart
	;;
  condstop)
    if [ -e "$LOCKFILE" ]; then
		stop
	fi
	;;
  condrestart)
	if [ -e "$LOCKFILE" ]; then
		restart
	fi
	;;
  condreload)
	if [ -e "$LOCKFILE" ]; then
		reload
	fi
	;;
  status)
	# TODO anyone with an idea how to dump monitored volumes?
	;;

  *)
	echo $"Usage: $0 {start|stop|reload|restart|status|force-stop|condstop|condrestart|condreload}"
	;;
esac

exit $RETVAL