#!/bin/bash
#
# 
# chkconfig: 2345 99 01
# description: iscsi-ha watchdog script
# processname: iscsi-ha-watchdog

# Function library
. /etc/init.d/functions

VERSION="2.1"
WATCH_INTERVAL="5"
PROCESS_NAME="iscsi-ha"
PROC_NAME=${PROCESS_NAME}-watchdog
PID_FILE=/var/run/${PROC_NAME}.pid
LOCK_FILE=/var/lock/subsys/${PROC_NAME}
GLOBAL_CONF=/etc/iscsi-ha/iscsi-ha.load
OVERIDE_CONF=/etc/iscsi-ha/iscsi-ha.conf
LIB_FUNCTIONS=/etc/iscsi-ha/iscsi-ha.func

check () {
	source ${LIB_FUNCTIONS}
	source ${GLOBAL_CONF}
	source ${OVERIDE_CONF}


	while :
	do
		sleep $WATCH_INTERVAL
		status $PROCESS_NAME &> /dev/null 
		RETVAL=$?
		case $RETVAL in
		
		0)
			log "$PROCESS_NAME Watchdog: $PROCESS_NAME running - OK "
			;;
		1)	
			log "$PROCESS_NAME Watchdog: $PROCESS_NAME is dead but pid file exists, starting $PROCESS_NAME"
			/etc/init.d/$PROCESS_NAME start #service $PROCESS_NAME start 
	                ;;
		2)
			log "$PROCESS_NAME Watchdog: $PROCESS_NAME is dead but subsys locked, starting $PROCESS_NAME"
	                /etc/init.d/$PROCESS_NAME start #service $PROCESS_NAME start
	                ;;
		3)
			log "$PROCESS_NAME Watchdog: $PROCESS_NAME is stopped, starting $PROCESS_NAME"
	                /etc/init.d/$PROCESS_NAME start #service $PROCESS_NAME start
	                ;;
		esac
	done
}

start() {
        if  [ -e $PID_FILE ]
        then
                for i in `/bin/cat $PID_FILE` # This can be an array
                do
			kill -0 $i 2> /dev/null
			RETVAL=$?
                        if [ $RETVAL -eq 0 ]
			then
				failure $"$PROC_NAME already running: $CURRENT_PID startup failed"
				echo $"$PROC_NAME already running: $CURRENT_PID startup failed"
				exit 1
			fi
                done
        fi

        check &
        if [ $? = 0 ]
        then
                /bin/touch $LOCK_FILE 
                /bin/touch $PID_FILE
                echo `pidof -x $PROC_NAME` > $PID_FILE
                echo -n $"Starting $PROC_NAME: "
                success
        else
                failure $"$PROC_NAME startup"
                echo $"Failed to start $PROC_NAME"
                killproc $PROC_NAME 2>/dev/null
                rm -f $LOCK_FILE 
                rm -f $PIDFILE
                exit 1
        fi
        echo
}

stop() {
        echo -n $"Stopping $PROC_NAME: "
	killproc $PROC_NAME 2>/dev/null
	RETVAL=$?
	if [ $RETVAL = 0 ]
	then
		success $"$PROC_NAME stop"
		rm -f $LOCK_FILE 
		rm -f $PID_FILE
	else
		warning $"$PROC_NAME stop"
        	echo $"Error stopping $PROC_NAME"
		exit 1
	fi
	echo
}

this_status () {
	if  [ -e $PID_FILE ]
	then
		for i in `/bin/cat $PID_FILE` # This can be an array
		do
			kill -0 $i 2> /dev/null
			RETVAL=$?
			if [ $RETVAL -eq 0 ]
			then
				success $"$PROC_NAME running: $i"
				echo $"$PROC_NAME running: $i"
				exit 0
			fi
		done

		warning $"$PROC_NAME is dead and /var/run pid file exists"
		echo "$PROC_NAME is dead and /var/run pid file exists"
		exit 1
	elif [ -e $LOCK_FILE ]
	then
		warning $"$PROC_NAME is dead and /var/lock lock file exists"
		echo "$PROC_NAME is dead and /var/lock lock file exists"
		exit 2
	else
		failure $"$PROC_NAME is not running"
		echo "$PROC_NAME is not running"
		exit 3
	fi

} #End status


case "$1" in
	start)
        	start
        	;;
	stop)
        	stop
        	;;
	status)
		this_status
        	;;
	restart)
		stop
		start
		;;
	 *)
        	echo $"Usage: $0 {start|stop|restart|status}"
        	exit 1
		;;
esac
exit 0