#!/bin/bash
#
# Based on the original distribution script modified for Slackware
#
# 08-Nov-2012  Michiel Broek <mbse @ mbse.eu>


prefix=/usr/share/nagios
exec_prefix=${prefix}
NagiosBin=/usr/bin/nagios
NagiosCfgFile=/etc/nagios/nagios.cfg
NagiosStatusFile=/var/nagios/status.dat
NagiosRetentionFile=/var/nagios/retention.dat
NagiosCommandFile=/var/nagios/rw/nagios.cmd
NagiosVarDir=/var/nagios
NagiosRunFile=/var/nagios/nagios.lock
NagiosLockDir=/var/lock/subsys
NagiosLockFile=nagios
NagiosCGIDir=${exec_prefix}/sbin
NagiosUser=nagios
NagiosGroup=nagios
NagiosStopTime=180


status_nagios()
{
    if ps -p $NagiosPID > /dev/null 2>&1; then
	return 0
    else
	return 1
    fi
    return 1
}



pid_nagios()
{
    if test ! -f $NagiosRunFile; then
	echo "No lock file found in $NagiosRunFile"
	exit 1
    fi
    NagiosPID=`head -n 1 $NagiosRunFile`
}



case "$1" in
  start)
    echo -n "Starting Nagios "
    $NagiosBin -v $NagiosCfgFile > /dev/null 2>&1;
    if [ $? -eq 0 ]; then
	touch $NagiosVarDir/nagios.log $NagiosRetentionFile
	chown $NagiosUser:$NagiosGroup $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."
    else
	echo "CONFIG ERROR! Check your Nagios configuration."
    fi
    ;;
  stop)
    echo -n "Stopping Nagios "
    pid_nagios
    kill $NagiosPID

    # 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
    i=0
    while [ $i -lt $NagiosStopTime ]; do
	if status_nagios > /dev/null; then
	    echo -n "."
	    sleep 1
	    i=$(($i+1))
	else
	    break
	fi
    done
    if status_nagios > /dev/null; then
	echo " Warning - nagios did not exit in a timely manner"
	kill -9 $NagiosPID
    else
	echo " done"
    fi
    rm -f $NagiosStatusFile $NagiosRunFile $NagiosLockDir/$NagiosLockFile $NagiosCommandFile
    ;;
  restart)
    $0 stop
    sleep 1
    $0 start
    ;;
  reload|force-reload)
    echo -n "Nagios reload "
    $NagiosBin -v $NagiosCfgFile > /dev/null 2>&1;
    if [ $? -eq 0 ]; then
	pid_nagios
	if status_nagios > /dev/null; then
	    kill -HUP $NagiosPID
	    echo "done."
	else
	    echo "failed."
	fi
    fi
    ;;
  status)
    pid_nagios
    if status_nagios > /dev/null; then
	echo "nagios (pid $NagiosPID) is running..."
    else
	echo "nagios is not running"
    fi
    ;;
  *)
    echo "usage: $0 {start|stop|restart|reload|force-reload|status}"  
esac