initd_oomscored

#!/bin/bash
#
# Start/Stop the OOM Score Daemon
#
# oomscored	OOM Score Daemon
# chkconfig:	- 14 86
# description:	Service to automatically set oom_score_adj for processes on a system
#
# processname: oomscored
# pidfile: /var/run/oomscored.pid
#
### BEGIN INIT INFO
# Provides:		oomscored
# Required-Start:	$local_fs $remote_fs $syslog
# Required-Stop:	$local_fs $remote_fs $syslog
# Should-Start:		
# Should-Stop:		
# Default-Start:	2 3 5
# Default-Stop:		0 1 6
# Short-Description:	start and stop the oom score daemon
# Description:		Service to automatically set oom_score_adj for processes on a system
### END INIT INFO

#FIXME: This is pretty ugly. How do we want to locate the script?
prefix=/usr;exec_prefix=/usr;sbindir=/usr/sbin
OOMSCORED_BIN=$sbindir/oomscoreadj.py
OOMSCORED_CONF=/etc/oomrules.conf

# Sanity checks
[ -x $OOMSCORED_BIN ] || exit 1

. /lib/lsb/init-functions

# Read in configuration options.
LOG_FILE=""
if [ -f "/etc/sysconfig/oomscored" ] ; then
	. /etc/sysconfig/oomscored
	OPTIONS="$OOMSCORED_OPTIONS"
else
	OPTIONS=""
fi

# For convenience
processname=oomscoreadj.py
servicename=oomscored
pidfile=/var/run/oomscored.pid

start()
{
	if [ -f "$pidfile" ]; then
		pid=$(pgrep -f -F $pidfile 'python.*'"$OOMSCORED_BIN")
		if [ $? -ne 1 ]; then
			log_warning_msg "Removing stale lock file $pidfile"
			rm -f "$pidfile"
		else
			log_failure_msg "$servicename is already running with PID `cat ${pidfile}`"
			return 1
		fi
	fi

	startproc -l $LOG_FILE -p $pidfile /usr/bin/python $OOMSCORED_BIN $OPTIONS
	retval=$?
	if [ $retval -ne 0 ]; then
		return 7
	fi

	pid=$(pgrep -f 'python.*'"$OOMSCORED_BIN")
	echo $pid > $pidfile
	return 0
}

stop()
{
	if [ ! -f $pidfile ]; then
		log_success_msg
		return 0
	fi
	pkill -TERM -f -F $pidfile 'python.*'"$OOMSCORED_BIN"
	retval=$?
	if [ $retval -ne 0 ]; then
		return 1
	fi
	rm -f "$pidfile"
	return 0
}

RETVAL=0

# See how we are called
case "$1" in
	start)
		echo -n "Starting OOM Score Daemon"
		start
		RETVAL=$?
		rc_status -v
		;;
	stop)
		echo -n "Stopping OOM Score Daemon"
		stop
		RETVAL=$?
		rc_status -v
		;;
	status)
		echo -n "Checking for OOM Score Daemon"
		RETVAL=1
		if [ -f "$pidfile" ]; then
		    pid=$(pgrep -f -F $pidfile 'python.*'"$OOMSCORED_BIN")
		    RETVAL=$?
		fi
		if [ $RETVAL -ne 0 ] ; then
			rc_failed 3
			RETVAL=3
		fi
		rc_status -v
		;;
	restart)
		stop
		start
		RETVAL=$?
		rc_status
		;;
	condrestart)
		if [ -f "$pidfile" ]; then
			stop
			start
			RETVAL=$?
		fi
		rc_status
		;;
	reload|flash)
		if [ -f "$pidfile" ]; then
			echo -n "Reloading rules configuration..."
			pkill -SIGUSR1 -f -F $pidfile 'python.*'"$OOMSCORED_BIN"
		else
			echo "$servicename is not running."
			rc_failed 7
		fi
		rc_status -v
		;;
	*)
		echo $"Usage: $0 {start|stop|status|restart|condrestart|reload}"
		RETVAL=2
		;;
esac

exit $RETVAL