#! /bin/sh

# Copyright (c) 1995-2001 SuSE GmbH Nuernberg, Germany.

#                    2002 SuSE Linux AG Nuernberg, Germany.

#                    2007 SuSE Linux GmbH Nuernberg, Germany.

#

# Author: Wolfgang Rosenauer, Lars Vogdt

# 

#

# /etc/init.d/nagios

#

#   and symbolic its link

#

# /usr/sbin/rcnagios

#

# System startup script for nagios

#

### BEGIN INIT INFO

# Provides:       nagios

# Required-Start: $local_fs $remote_fs $syslog $network 

# Required-Stop:  $local_fs $remote_fs $syslog $network

# Should-Start:   $time sendmail httpd2 xntpd $named cron ndo2db

# Should-Stop:    sendmail ndo2db

# Default-Start:  3 5

# Default-Stop:   0 1 2 6

# Short-Description: Network monitor Nagios

# Description:    Starts and stops the Nagios monitor

#   used to provide network services status for hosts,

#   services and networks.

### END INIT INFO

​

. /etc/rc.status

​

NAGIOS_BIN=/usr/sbin/nagios

NAGIOS_CFG=/etc/nagios/nagios.cfg

NAGIOS_SYSCONFIG=/etc/sysconfig/nagios

NAGIOS_CFG_ERR_LOG=/var/log/nagios/config.err

​

# Read config and log errors in logfile

function config_check () {

    $NAGIOS_BIN -v $NAGIOS_CFG > /dev/null 2>&1

    if [ $? -eq 0 ]; then

        return 0

    else

        $NAGIOS_BIN -v $NAGIOS_CFG > $NAGIOS_CFG_ERR_LOG 2>&1

        return 1

    fi

}

​

# grab a config option 

function get_var() {

    if [ -n "$2" ]; then

        set -- `grep ^$1 $2 | sed 's@=@ @' | tr -d '[:cntrl:]'`

    else

        set -- `grep ^$1 $NAGIOS_CFG | sed 's@=@ @' | tr -d '[:cntrl:]'`

    fi

    shift # remove first ARG => search-string

    echo $*

}

​

# check some default files and directories

function check_files() {

    # set default access rights for files and directories

    for file in $check_result_path $log_file $state_retention_file $status_file; do

    if [ -e $file ]; then

            touch $file

            chown $nagios_user:$nagios_cmdgrp $file

    fi

    done

    chmod 660 $resource_file

    chown $nagios_user:$nagios_cmdgrp $resource_file

    # remove some perhaps left over files   

    for file in $command_file $lock_file $status_file $temp_file /var/lock/subsys/nagios; do

        test -f $file && rm -f $file

    done

}

​

# Check for missing binaries (stale symlinks should not happen)

# Note: Special treatment of stop for LSB conformance

test -x $NAGIOS_BIN || { echo "$NAGIOS_BIN not installed";

    if [ "$1" = "stop" ]; then exit 0;

    else exit 5; fi; }

​

# Check for existence of needed config file

test -r $NAGIOS_CFG || { echo "$NAGIOS_CFG not existing";

    if [ "$1" = "stop" ]; then exit 0;

    else exit 6; fi; }

​

# Check for existence of sysconfig file and read it

test -r $NAGIOS_SYSCONFIG || { echo "$NAGIOS_SYSCONFIG not existing";

    if [ "$1" = "stop" ]; then exit 0;

    else exit 6; fi; }

​

. $NAGIOS_SYSCONFIG

​

# set values for sysconfig vars

if [ -n "$NAGIOS_NICELEVEL" ]; then

    NICELEVEL="-n $NAGIOS_NICELEVEL"

else

    NICELEVEL="-n 0"

fi

if [ -z "$NAGIOS_TIMEOUT" ]; then

    NAGIOS_TIMEOUT=10

fi

​

#

# get variables from config file

#

nagios_user="$(get_var nagios_user)"

lock_file="$(get_var lock_file)"

status_file="$(get_var status_file)"

log_file="$(get_var log_file)"

temp_file="$(get_var temp_file)"

state_retention_file="$(get_var state_retention_file)"

command_file="$(get_var command_file)"

resource_file="$(get_var resource_file)"

object_cache_file="$(get_var object_cache_file)"

check_result_path="$(get_var check_result_path)"

​

#

# use default values if above check doesn't work

#

: ${nagios_user:=nagios}

: ${nagios_cmdgrp:=nagcmd}

: ${resource_file:=/etc/nagios/resource.cfg}

# check ownership files

: ${check_result_path:=/var/spool/nagios}

: ${log_file:=/var/log/nagios/nagios.log}

: ${state_retention_file:=/var/log/nagios/retention.dat}

: ${status_file:=/var/log/nagios/status.dat}

# files to remove

: ${command_file:=/var/spool/nagios/nagios.cmd}

: ${lock_file:=/var/run/nagios.pid}

: ${object_cache_file:=/var/lib/nagios/objects.cache}

: ${temp_file:=/var/log/nagios/nagios.tmp}

​

# Reset status of this service

rc_reset

​

case "$1" in

    start)

        echo -n "Starting nagios "

        config_check

        if [ $? -eq 0 ]; then

            # check if nagios is already running

            NAGPID=$(pidof $NAGIOS_BIN)

            if [ -n "$NAGPID" ]; then

                echo "- Error: looks like nagios is still running with PID $NAGPID"

                echo -n "- trying to kill previous nagios process"

                kill -9 $NAGPID

                sleep 2

            fi  

            check_files

            startproc $NICELEVEL -p $lock_file $NAGIOS_BIN -d $NAGIOS_CFG

        else

            echo "- Error in configuration files"

            echo -n "- please read $NAGIOS_CFG_ERR_LOG"

            rc_failed

        fi

        rc_status -v

    ;;

    stop)

        echo -n "Shutting down nagios "

        # we have to wait for nagios to exit and remove its

        # own Lockfile, otherwise a following "start" could

        # happen, and then the exiting nagios will remove the

        # new Lockfile, allowing multiple nagios daemons

        # to (sooner or later) run - John Sellens

​

        if checkproc $NAGIOS_BIN ; then

            killproc -p $lock_file -TERM $NAGIOS_BIN

            sleep 1

            if [ -e $lock_file ]; then

                echo "Warning - nagios did not exit in a timely manner. Waiting..."

                while [ -e $lock_file ] && [ $NAGIOS_TIMEOUT -gt 0 ] ; do

                    sleep 1

                    NAGIOS_TIMEOUT=$[$NAGIOS_TIMEOUT-1]

                    echo -n '.'

                    [ $NAGIOS_TIMEOUT -eq 41 ] && echo

                done

            fi

            if checkproc $NAGIOS_BIN ; then

                killproc -p $lock_file -SIGKILL $NAGIOS_BIN 

                echo -n "Warning: nagios killed"

            fi

        else

            echo -n "nagios not running"

            rc_failed 7

        fi

        check_files

        rc_reset

        rc_status -v

    ;;

    try-restart)

        ## Do a restart only if the service was active before.

        ## Note: try-restart is now part of LSB (as of 1.9).

        ## RH has a similar command named condrestart.

        $0 status

        if test $? = 0; then

            $0 restart

        else

            rc_reset        # Not running is not a failure.

        fi

        # Remember status and be quiet

        rc_status

    ;;

    restart)

        $0 stop

        $0 start

        rc_status

    ;;

    reload|force-reload)

        echo -n "Reload service nagios "

        config_check

        if [ $? -eq 0 ]; then

          echo -n "Passed configuration check - reloading..."

          killproc -HUP -p $lock_file $NAGIOS_BIN

        else

          echo "- Error in configuration files"

          echo -n "- aborting reload - please read $NAGIOS_CFG_ERR_LOG"

          rc_failed

        fi

        rc_status -v

    ;;

    status)

        echo -n "Checking for nagios "

        checkproc -p $lock_file $NAGIOS_BIN

        rc_status -v

    ;;

    check|check_verbose)

        echo "Running configuration check..."

        config_check

        if [ $? -eq 0 ]; then

            echo -n "- Passed configuration check"

            test -f $NAGIOS_CFG_ERR_LOG && rm $NAGIOS_CFG_ERR_LOG

            rc_reset

        else

            echo "- Error in configuration files"

            if [ $1 == "check_verbose" ]; then

                cat $NAGIOS_CFG_ERR_LOG

            else

                echo -n "- please read $NAGIOS_CFG_ERR_LOG"

            fi

            rc_failed

        fi

        rc_status -v

    ;;

    *)

        echo "Usage: $0 {start|stop|status|try-restart|restart|reload|check|check_verbose}"

        exit 1

        ;;

esac

rc_exit

​