#!/bin/sh
#
# cgred		CGroups Rules Engine Daemon
# chkconfig:	2345 02 98
# description:	This is a daemon for automatically classifying processes \
#		into cgroups based on UID/GID.
#
# processname:	cgrulesengd
# pidfile:	/var/run/cgrulesengd.pid
#

# Source function library
. /etc/rc.d/init.d/functions

# Read in configuration options.
[ -f /etc/sysconfig/cgred ] && . /etc/sysconfig/cgred

start() {
	if [ -f /var/lock/subsys/cgred ]; then
		msg_already_running "CGroup Rules Engine Daemon"
		return
	fi

	if [ ! -s /etc/cgrules.conf ]; then
		nls "CGroup Rules Engine Daemon not configured"
		RETVAL=6
		return
	fi
	if ! grep -qs "^cgroup" /proc/mounts; then
		nls "Cannot find cgroups, is cgconfig service running?"
		RETVAL=1
		return
	fi

	msg_starting "CGroup Rules Engine Daemon"

	daemon --pidfile /var/run/cgrulesengd.pid /sbin/cgrulesengd $OPTIONS
	RETVAL=$?
	if [ $RETVAL -ne 0 ]; then
		return 7
	fi
	touch /var/lock/subsys/cgred
	pidof cgrulesengd > /var/run/cgrulesengd.pid
}

stop() {
	if [ ! -f /var/lock/subsys/cgred ]; then
		msg_not_running "CGroup Rules Engine Daemon"
		return
	fi

	msg_stopping "CGroup Rules Engine Daemon"
	killproc --pidfile /var/run/cgrulesengd.pid cgrulesengd -TERM
	RETVAL=$?
	rm -f /var/lock/subsys/cgred /var/run/cgrulesengd.pid
}

reload() {
	if [ ! -f /var/lock/subsys/cgred ] ; then
		msg_not_running "CGroup Rules Engine Daemon"
		return
	fi

	show "Reloading rules configuration..."
	# SIGUSR2
	kill -s 12 $(cat ${pidfile})
	RETVAL=$?
	if [ $RETVAL -eq 0 ]; then
		fail
	else
		ok
	fi
}

condrestart() {
	if [ ! -f /var/lock/subsys/cgred ]; then
		msg_not_running "CGroup Rules Engine Daemon"
		RETVAL=$1
		return
	fi

	stop
	start
}

RETVAL=0
# See how we are called
case "$1" in
  start)
	start
	;;
  stop)
	stop
	;;
  restart)
	stop
	start
	;;
  reload)
  	reload
	;;
  try-restart)
	condrestart 0
	;;
  force-reload)
	condrestart 7
	;;
  status)
	status --pidfile /var/run/cgrulesengd.pid cgrulesengd
	RETVAL=$?
	;;
  *)
	msg_usage "$0 {start|stop|restart|try-restart|reload|force-reload|status}"
	exit 3
	;;
esac

exit $RETVAL