#!/bin/bash
#
# Copyright (C) 2015 Red Hat, Inc. All rights reserved.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# This file is part of LVM2.
# It 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 LVM poll daemon
#
# For Red-Hat-based distributions such as Fedora, RHEL, CentOS.
#
### BEGIN INIT INFO
# Provides: lvm2-lvmpolld
# Required-Start: $local_fs
# Required-Stop: $local_fs
# Default-Start: 1 2 3 4 5
# Default-Stop: 0 6
# Short-Description: A daemon that is responsible for monitoring in-progress
#		     and possibly longer term operations on logical volumes. 
#		     It helps to reduce the number of spawned processes if same
#                    logical volume is requested to get monitored multiple times.
#                    Also avoids unsolicited termination due to external factors.
### END INIT INFO

. /etc/init.d/functions

DAEMON=lvmpolld

sbindir="/usr/sbin"

LOCK_FILE="/run/lock/lvm/subsys/$DAEMON"
PID_FILE=""

rh_status() {
	status -p "$PID_FILE" "$DAEMON"
}

rh_status_q() {
	rh_status >/dev/null 2>&1
}

start()
{
	ret=0
	action "Starting LVM poll daemon:" "$sbindir/$DAEMON" || ret=$?
	return $ret
}

stop()
{
	ret=0
	action "Signaling LVM poll daemon to exit:" killproc -p "$PID_FILE" "$DAEMON" -TERM || ret=$?
	return "$ret"
}

rtrn=1

# See how we were called.
case "$1" in
  start)
	rh_status_q && exit 0
	start
	rtrn=$?
	[ $rtrn = 0 ] && touch "$LOCK_FILE"
	;;

  stop|force-stop)
	rh_status_q || exit 0
	stop
	rtrn=$?
	[ $rtrn = 0 ] && rm -f "$LOCK_FILE"
	;;

  restart)
	if stop
	then
		start
	fi
	rtrn=$?
	;;

  condrestart|try-restart)
	rh_status_q || exit 0
	if stop
	then
		start
	fi
	rtrn=$?
	;;

  status)
	rh_status
	rtrn=$?
	;;

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

exit $rtrn
