#!/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.
#

# Load any extra environment variables for Nagios and its plugins
if test -f /etc/sysconfig/nagios; then
    . /etc/sysconfig/nagios
fi

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
exec_prefix=/usr
NagiosBin=/usr/bin/nagios
NagiosCfgFile=/etc/nagios/nagios.cfg
NagiosStatusFile=/var/log/nagios/status.dat
NagiosRetentionFile=/var/log/nagios/retention.dat
NagiosCommandFile=/var/log/nagios/rw/nagios.cmd
NagiosVarDir=/var/log/nagios
#NagiosRunFile=/var/log/nagios/nagios.pid
NagiosRunFile=/var/log/nagios/nagios.pid
NagiosLockDir=/var/lock/subsys
NagiosLockFile=nagios
NagiosCGIDir=/usr/lib/nagios/cgi
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
            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

        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