#!/bin/sh
#
# pbs_mom	This script will start and stop the PBS Mom
#
# chkconfig: 345 95 5
# description: TORQUE/PBS is a versatile batch system for SMPs and clusters
#
ulimit -n 32768
# Source the library functions
. /etc/rc.d/init.d/functions

# NOTE: customize these variables as needed
SBIN_PATH=@sbindir@
PBS_DAEMON="$SBIN_PATH/pbs_mom"
PBS_HOME=@PBS_HOME@

if [ -f /etc/sysconfig/pbs_mom ];then
    . /etc/sysconfig/pbs_mom
fi

if [ -z "$previous" ];then
   # being run manually, don't disturb jobs
   args="$args -p"
else
   args="$args -q"
fi

pidof_pbs_mom() {
   pid="-1"
   if [ -f $PBS_HOME/mom_priv/mom.lock ];then
   	pid=`cat $PBS_HOME/mom_priv/mom.lock`
   fi
   echo $pid
}

kill_pbs_mom() {
   pid=`pidof_pbs_mom`

   if [ $pid -le 1 ];then
      return -1;
   fi
   retval=1
   while kill -0 $pid 2>/dev/null;do
      $SBIN_PATH/momctl -s
      retval=$?
      sleep 1
   done
   return $retval
}
	
# how were we called
case "$1" in
	start)
		echo -n "Starting TORQUE Mom: "
		# check if pbs_mom is already running
		status pbs_mom 2>&1 > /dev/null
		RET=$?
		[ $RET -eq 0 ] && echo -n "pbs_mom already running" && success && echo && exit 0

                # ulimit -c unlimited  # Uncomment this to preserve core files
		daemon $PBS_DAEMON $args -d $PBS_HOME
		RET=$?
		touch /var/lock/subsys/pbs_mom
   		echo
		;;
	purge)
		[ -f /var/lock/subsys/pbs_mom ] && $0 stop
		echo -n "Starting TORQUE Mom with purge: "
		daemon $PBS_DAEMON -r
		RET=$?
		[ $RET -eq 0 ] &&  touch /var/lock/subsys/pbs_mom
   		echo
		;;
	stop)
		echo -n "Shutting down TORQUE Mom: "
		# check if pbs_mom is running
		status pbs_mom 2>&1 > /dev/null
		RET=$?
		[ ! $RET -eq 0 ] && echo -n "pbs_mom already stopped" && success && echo && exit 0

		kill_pbs_mom
		RET=$?
		[ $RET -eq 0 ] && success "shutdown" || failure "shutdown"
		echo
		rm -f /var/lock/subsys/pbs_mom
		;;
	status)
		status pbs_mom
		RET=$?
		;;
	restart)
		$0 stop
		sleep 1
		$0 start
		;;
	reload)
	        echo -n "Re-reading TORQUE Mom config file: "
		kill -HUP `pidof_pbs_mom`
		RET=$?
		[ $RET -eq 0 ] && success "HUP" || failure "HUP"
		echo
	        ;;
	*)
		echo "Usage: pbs_mom {start|stop|restart|reload|status|purge}"
		exit 1
esac
exit $RET