#!/bin/sh

#
# Check_Service Rel. 1.00
#
# Copyleft 2004 IBCL
#
# Author: Christoph Lechleitner <lech@ibcl.at>
#
# Please call 
#   check_service --help 
# for usage information
#

# reading parameters
SERVICENAME="$1"
shift
OPTIONS="$*"

if [ $(echo " $SERVICENAME $OPTIONS " |egrep -i -- " (-v|--version) ") ]
then
  echo "check_service 1.00 by Christoph Lechleitner <lech@ibcl.at>"

  exit 0
fi
if [ $(echo " $SERVICENAME $OPTIONS " |egrep -i -- " (-h|--help) ") ]
then
  echo '
Service check plugin for Nagios 1.x, Release 1.00, Copyleft 2004 by IBCL.at

Usage: check_service servicename [--tryrestart]
       check_service -h|--help
       check_service -v|--version

Options:
servicename
    Name of script in /etc/init.d
-h, --help
    Prints this help text
--tryrestart
    Tries to restart a dead service.
-v, --version
    Prints the version information

Checks, if a service runs and optionally tries to restart it.
Requirements:
/etc/init.d/<servicename> status must return 0 if and only if service is ok 
/etc/init.d/<servicename> restart must try to (stop and) start the service

If you have comments or suggestions, feel free to contact the
Author: Christoph Lechleitner <lech@ibcl.at>
'
  exit 0
fi

if [ "$SERVICENAME" == "" ]
then
  echo "Service UNKNOWN No servicename given."
  echo "Usage: check_service servicename [--tryrestart] [--help] [--version]"
  exit 3
fi  

if [ ! -x /etc/init.d/$SERVICENAME ]
then
  echo "Service UNKNOWN $SERVICENAME not found in /etc/init.d"
  exit 3
fi

STATUSMSG=$(/etc/init.d/$SERVICENAME status)
RC=$?
if [ $RC == 0 ]
then
  echo "Service OK $SERVICENAME $STATUSMSG"
  exit 0
else
  if [ $(echo " $OPTIONS " |grep -i -- " --tryrestart ") ]
  then 
    RESTARTMSG=$(/etc/init.d/$SERVICENAME restart)
    STATUS2MSG=$(/etc/init.d/$SERVICENAME status)
    RC2=$?
    if [ $RC2 == 0 ]
    then
      echo "Service WARNING Had to restart $SERVICENAME"
      exit 1
    else
      echo "Service CRITICAL Failed to restart $SERVICENAME $STATUS2MSG"
      exit 2
    fi
  else
    echo "Service CRITICAL $SERVICENAME $STATUSMSG"
    exit 2
  fi
fi