#!/bin/sh
#
# cgred		CGroups Rules Engine Daemon
# chkconfig:	- 14 86
# description:	This is a daemon for automatically classifying processes \
#		into cgroups based on UID/GID.
#
# processname:	cgrulesengd
# pidfile:	/var/run/cgred.pid
#

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

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"
		return 6
	fi
	if ! grep -qs "^cgroup" /proc/mounts ; then
		nls "Cannot find cgroups, is cgconfig service running?"
		return 1
	fi
	msg_staring "CGroup Rules Engine Daemon"
	# Read in configuration options.
	OPTIONS=""
	if [ -f "/etc/sysconfig/cgred.conf" ] ; then
		. /etc/sysconfig/cgred.conf

		OPTIONS="$NODAEMON $LOG"
		[ -n "$LOG_FILE" ] && OPTIONS="$OPTIONS --logfile=$LOG_FILE"
		[ -n "$SOCKET_USER" ] && OPTIONS="$OPTIONS -u $SOCKET_USER"
		[ -n "$SOCKET_GROUP" ] && OPTIONS="$OPTIONS -g $SOCKET_GROUP"
	fi

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

stop() {
	if [ -f /var/lock/subsys/cgred ]; then
		msg_stopping "CGroup Rules Engine Daemon"
		killproc -p /var/run/cgred.pid cgrulesengd -TERM
		RETVAL=$?
		if [ $RETVAL -eq 0 ] ; then
			rm -f /var/lock/subsys/cgred
			rm -f /var/run/cgred.pid
		fi
	else
		msg_not_running "CGroup Rules Engine Daemon"
	fi
}

RETVAL=0
# See how we are called
case "$1" in
  start)
	start
	RETVAL=$?
	;;
  stop)
	stop
	RETVAL=$?
	;;
  status)
	status -p /var/run/cgred.pid cgred
	RETVAL=$?
	;;
  restart)
	stop
	start
	;;
  condrestart)
	if [ -f /var/lock/subsys/cgred ] ; then
		stop
		start
	fi
	;;
  reload|flash)
	if [ -f /var/lock/subsys/cgred ] ; then
		show "Reloading rules configuration..."
		# SIGUSR2
		kill -s 12 `cat ${pidfile}`
		RETVAL=$?
		if [ $RETVAL -eq 0 ] ; then
			fail
		else
			ok
		fi
	else
		msg_not_running "cgred"
	fi
	;;
  *)
	msg_usage "$0 {start|stop|status|restart|condrestart|reload}"
	exit 3
	;;
esac

exit $RETVAL