#!/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.
#

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 ()
{

       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
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
                       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; fi
                       su - $NagiosUser -c "/usr/local/nagios/bin/ndo2db-3x -c /usr/local/nagios/etc/ndo2db.cfg"
                       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
                   echo 'done.'
               fi
               killall ndo2db-3x

               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
                       killall ndo2db-3x
                       su -  $NagiosUser -c "/usr/local/nagios/bin/ndo2db-3x -c  /usr/local/nagios/etc/ndo2db.cfg"
               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