#!/bin/sh
#
# Startup script for zebra
# This runs subscripts (eg for bgpd), 
# so don't need to start dependant demons separately
#
# processname: zebra
# pidfile: /var/run/zebra.pid
# config: /etc/zebra/zebra.conf
# chkconfig: 35 21 79
# description: Start and stop zebra

# Global definitions
DEMON=zebra
PID_FILE="/var/run/${DEMON}.pid"

#-----------------------------------
#check that we can detect zebra by its name
COUNT=`grep -c ^zebra /etc/services`
if [ "$COUNT" = "0" ]
then
	"$0 needs zebra 2601/tcp and zebrasrv 2600/tcp entries in /etc/services, exiting"
	exit 1
fi

zebra_start()
{
	#you can start multiple copies of zebra 
	#even though only the first will bind to the port
	#
	#test to see if already running
	COUNT=`netstat -an | grep -c /tmp/.${DEMON}$`
	if [ "$COUNT" = "0" ]
	then
		echo -n "$DEMON "
		/usr/sbin/$DEMON &
	else
		echo "$0: $DEMON already running, no action taken"
	fi
	#/etc/rc.d/rc.bgpd start
	#/etc/rc.d/rc.ospfd start
	/etc/rc.d/rc.ripd start
}

zebra_stop()
{
	#echo -n "Shutting down $DEMON: "
	#have to shutdown bgpd first
	/etc/rc.d/rc.ripd stop
	#/etc/rc.d/rc.ospfd stop
	#/etc/rc.d/rc.bgpd stop

	if [ -f $PID_FILE ]
	then
		kill `cat $PID_FILE`
		rm -rf $PID_FILE
		#if things have got out of step,
		#then the PID_FILE #doesn't neccessarily have the PID of $DEMON,
		#and the above command will try to kill a process that doesn't exist.
		#did we kill a process that existed
		if [ "$?" = "0" ]
		then
			true
		else
			killall $DEMON
			rm -rf $PID_FILE
		fi
		logger -p local0.notice "$DEMON: stop"
	else
		#no PID file found
		COUNT=`netstat -an | grep -c /tmp/.${DEMON}$`
		if [ "$COUNT" = "0" ]
		then
			logger "$0: no $DEMON to kill"
		else
			killall $DEMON
			rm -rf $PID_FILE
			logger -p local0.notice "$DEMON: stop"
		fi
	fi 
	#if by mistake, you had started a zebra by hand, 
	#after having started one with this script,
	#you would still have a zebra running.
	COUNT=`netstat -an | grep -c /tmp/.$DEMON$`
	if [ "$COUNT" != "0" ]
	then
		echo "$0: $DEMON still running, rerunning zebra_stop"
		zebra_stop
	fi
}

# See how we were called.
case "$1" in
  start)
	zebra_start
	;;
  stop)
	zebra_stop
	;;
  restart)
	zebra_stop
	#don't know if this is neccessary, but just in case
	sleep 1
	zebra_start
	;;
  reload)
	/etc/rc.d/rc.ripd reload
	#/etc/rc.d/rc.bgpd reload
	#/etc/rc.d/rc.ospfd reload
	#echo -n "Reloading $DEMON config: "
	kill -HUP `cat $PID_FILE`
	if [ "$?" != "0" ]
	then
		echo "$0; reload failed, executing restart"
		$0 restart
	fi	
	;;
  *)
	echo "Usage: $0 {start|stop|restart|reload}"
	exit 1
esac

exit 0