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#!/bin/sh
# 
# chkconfig: 345 99 01
# description: Nagios network monitor
#
# File : nagios
#
# Author : Jorge Sanchez Aymar (jsanchez@lanchile.cl)
# 
# Changelog :
#
# 1999-07-09 Karl DeBisschop <kdebisschop@infoplease.com>
#  - setup for autoconf
#  - add reload function
# 1999-08-06 Ethan Galstad <egalstad@nagios.org>
#  - Added configuration info for use with RedHat's chkconfig tool
#    per Fran Boon's suggestion
# 1999-08-13 Jim Popovitch <jimpop@rocketship.com>
#  - added variable for nagios/var directory
#  - cd into nagios/var directory before creating tmp files on startup
# 1999-08-16 Ethan Galstad <egalstad@nagios.org>
#  - Added test for rc.d directory as suggested by Karl DeBisschop
# 2000-07-23 Karl DeBisschop <kdebisschop@users.sourceforge.net>
#  - Clean out redhat macros and other dependencies
# 2003-01-11 Ethan Galstad <egalstad@nagios.org>
#  - Updated su syntax (Gary Miller)
#
# Description: Starts and stops the Nagios monitor
#              used to provide network services status.
#
### BEGIN INIT INFO
# Provides:             nagios
# Required-Start:       $local_fs $syslog $network +ndo2db
# Default-Start:
# Default-Stop:
# Short-Description:    start and stop nagios daemon
# Description:          nagios
### END INIT INFO  
status_nagios ()
{

	if test -x $NagiosCGI/daemonchk.cgi; then
		if $NagiosCGI/daemonchk.cgi -l $NagiosRunFile; then
		        return 0
		else
			return 1
		fi
	else
		if ps -p $NagiosPID > /dev/null 2>&1; then
		        return 0
		else
			return 1
		fi
	fi

	return 1
}


printstatus_nagios()
{

	if status_nagios $1 $2; then
		echo "nagios (pid $NagiosPID) is running..."
	else
		echo "nagios is not running"
	fi
}


killproc_nagios ()
{
echo $2
	kill $2 $NagiosPID

}


pid_nagios ()
{

	if test ! -f $NagiosRunFile; then
		echo "No lock file found in $NagiosRunFile"
		exit 1
	fi

	NagiosPID=`head -n 1 $NagiosRunFile`
}


# Source function library
# Solaris doesn't have an rc.d directory, so do a test first
if [ -f /etc/rc.d/init.d/functions ]; then
	. /etc/rc.d/init.d/functions
elif [ -f /etc/init.d/functions ]; then
	. /etc/init.d/functions
fi

prefix=/usr/local/nagios
exec_prefix=${prefix}
NagiosBin=${exec_prefix}/bin/nagios
NagiosCfgFile=${prefix}/etc/nagios.cfg
NagiosStatusFile=${prefix}/var/status.dat
NagiosRetentionFile=${prefix}/var/retention.dat
NagiosCommandFile=${prefix}/var/rw/nagios.cmd
NagiosVarDir=${prefix}/var
NagiosRunFile=${prefix}/var/nagios.lock
#NagiosLockDir=/var/lock/subsys
NagiosLockDir=/usr/local/nagiosxi/var/subsys
NagiosLockFile=nagios
NagiosCGIDir=${exec_prefix}/sbin
NagiosUser=nagios
NagiosGroup=nagios
          

# Check that nagios exists.
if [ ! -f $NagiosBin ]; then
    echo "Executable file $NagiosBin not found.  Exiting."
    exit 1
fi

# Check that nagios.cfg exists.
if [ ! -f $NagiosCfgFile ]; then
    echo "Configuration file $NagiosCfgFile not found.  Exiting."
    exit 1
fi
          
# See how we were called.
case "$1" in

	start)
		echo -n "Starting nagios:"
		$NagiosBin -v $NagiosCfgFile > /dev/null 2>&1;
		if [ $? -eq 0 ]; then
# THESE TWO LINES WERE ADDED TO WORK WITH SUDO
		        touch $NagiosVarDir/nagios.log $NagiosRetentionFile
			chown $NagiosUser $NagiosVarDir/nagios.log $NagiosRetentionFile
#			su - $NagiosUser -c "touch $NagiosVarDir/nagios.log $NagiosRetentionFile"
			rm -f $NagiosCommandFile
			touch $NagiosRunFile
			chown $NagiosUser:$NagiosGroup $NagiosRunFile
			$NagiosBin -d $NagiosCfgFile
			if [ -d $NagiosLockDir ]; then 
			    touch $NagiosLockDir/$NagiosLockFile; 
			    chown $NagiosUser:$NagiosGroup $NagiosLockDir/$NagiosLockFile;
			fi
			echo " done."
			exit 0
		else
			echo "CONFIG ERROR!  Start aborted.  Check your Nagios configuration."
			exit 1
		fi
		;;

	stop)
		echo -n "Stopping nagios: "

		pid_nagios
		killproc_nagios nagios

 		# now we have to wait for nagios to exit and remove its
 		# own NagiosRunFile, otherwise a following "start" could
 		# happen, and then the exiting nagios will remove the
 		# new NagiosRunFile, allowing multiple nagios daemons
 		# to (sooner or later) run - John Sellens
		#echo -n 'Waiting for nagios to exit .'
 		for i in 1 2 3 4 5 6 7 8 9 10; do
 		    if status_nagios > /dev/null; then
 			echo -n '.'
 			sleep 1
 		    else
 			break
 		    fi
 		done
		
 		if status_nagios > /dev/null; then
 		    echo ''
 		    echo 'Warning - nagios did not exit in a timely manner'
 		else

		    # Forcefully kill all other nagios processes that might be running, so we don't end up with a wierd setup

                    # Get a list of PIDs for all running Nagios daemons
		    plist=`ps axuw | grep "/usr/local/nagios/bin/nagios -d"  | awk '{print $2}'`
		    #echo "PIDS"
		    #echo $plist
		    for pid in $plist; do
			#echo "KILL $pid"
			kill -9 $pid > /dev/null 2>&1
		    done
		
 		    echo 'done.'
 		fi

		rm -f $NagiosStatusFile $NagiosRunFile $NagiosLockDir/$NagiosLockFile $NagiosCommandFile
		;;

	status)
		pid_nagios
		printstatus_nagios nagios
		;;

	checkconfig)
		printf "Running configuration check..."
		$NagiosBin -v $NagiosCfgFile > /dev/null 2>&1;
		if [ $? -eq 0 ]; then
			echo " OK."
		else
			echo " CONFIG ERROR!  Check your Nagios configuration."
			exit 1
		fi
		;;

	restart)
		printf "Running configuration check..."
		$NagiosBin -v $NagiosCfgFile > /dev/null 2>&1;
		if [ $? -eq 0 ]; then
			echo "done."
			$0 stop
			$0 start
		else
			echo " CONFIG ERROR!  Restart aborted.  Check your Nagios configuration."
			exit 1
		fi
		;;

	reload|force-reload)
		printf "Running configuration check..."
		$NagiosBin -v $NagiosCfgFile > /dev/null 2>&1;
		if [ $? -eq 0 ]; then
			echo "done."
			if test ! -f $NagiosRunFile; then
				$0 start
			else
				pid_nagios
				if status_nagios > /dev/null; then
					printf "Reloading nagios configuration..."
					killproc_nagios nagios -HUP
					echo "done"
				else
					$0 stop
					$0 start
				fi
			fi
		else
			echo " CONFIG ERROR!  Reload aborted.  Check your Nagios configuration."
			exit 1
		fi
		;;

	*)
		echo "Usage: nagios {start|stop|restart|reload|force-reload|status|checkconfig}"
		exit 1
		;;

esac
  
# End of this script