Rewrote most of the code, added help text, arguments, switches etc

check_quake.sh

@@ -1,12 +1,172 @@
 #!/bin/bash
-HOST=$1
-PORT=$2
-STATE=`quakestat -u -default q2s ${HOST}:${PORT} | grep "${HOST}"`
-if [[ $? == 0 ]]; then
-printf "${PORT} - OK\n"
-exit 0
-elif [[ $? == 1 ]]; then
-printf "${PORT} - DOWN\n"
-exit 2
+
+################################################################################
+#                                                                              #
+#  Copyright (C) 2012 Jack-Benny Persson <jack-benny@cyberinfo.se>             #
+#                                                                              #
+#   This program is free software; you can redistribute it and/or modify       #
+#   it under the terms of the GNU General Public License as published by       #
+#   the Free Software Foundation; either version 2 of the License, or          #
+#   (at your option) any later version.                                        #
+#                                                                              #
+#   This program is distributed in the hope that it will be useful,            #
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of             #
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              #
+#   GNU General Public License for more details.                               #
+#                                                                              #
+#   You should have received a copy of the GNU General Public License          #
+#   along with this program; if not, write to the Free Software                #
+#   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA  #
+#                                                                              #
+################################################################################
+
+###############################################################################
+#                                                                             # 
+# Nagios plugin to monitor a Quake II server.                                 #
+# The plugin exit with a CRICITAL error code if the server is down.           #
+# This behavior can be changed with the --warning argument.                   # 
+# Written in Bash (and uses standard tools such as grep and awk).             #
+#                                                                             #
+###############################################################################
+
+VERSION="0.1"
+AUTHOR="(c) 2012 Jack-Benny Persson (jack-benny@cyberinfo.se)"
+
+# Exit codes
+STATE_OK=0
+STATE_WARNING=1
+STATE_CRITICAL=2
+STATE_UNKNOWN=3
+
+# Some default values
+PORT=27919
+
+shopt -s extglob
+
+#### Functions ####
+
+# Print version information
+print_version()
+{
+	printf "\n\n$0 - $VERSION\n"
+}
+
+#Print help information
+print_help()
+{
+	print_version
+	printf "$AUTHOR\n"
+	printf "Monitor a Quake II server\n"
+/bin/cat <<EOT
+
+Options:
+-h
+   Print detailed help screen
+-V
+   Print version information
+-H 
+   Set the host/IP of the server to watch
+-P
+   Set the port number of the Quake server to watch
+   Default is 27910
+--warning
+   Issue a warning state instead of a critical state 
+   Default is critical
+
+EOT
+}
+
+
+# Parse command line options
+while [[ -n "$1" ]]; do 
+   case "$1" in
+
+       -h | --help)
+           print_help
+           exit $STATE_OK
+           ;;
+
+       -V | --version)
+           print_version
+           exit $STATE_OK
+           ;;
+
+       -\?)
+	   print_help
+           exit $STATE_OK
+           ;;
+
+       -H)
+	   if [[ -z "$2" ]]; then
+		printf "\nOption $1 requires an argument\n"
+		print_help
+		exit $STATE_UNKNOWN
+	   fi
+		HOST=$2
+           shift 2
+           ;;
+
+       -P)
+           if [[ -z "$2" ]]; then
+                printf "\nOption $1 requires an argument\n"
+		print_help
+                exit $STATE_UNKNOWN
+           fi
+                PORT=$2
+           shift 2
+           ;;
+
+       --warning)
+           warning="yes"
+	   shift 1
+	   ;;
+
+	*)
+           printf "\nInvalid option $1"
+           print_help
+           exit $STATE_UNKNOWN
+           ;;
+
+
+   esac
+done
+
+### Check if we provided a host and a port number ###
+
+if [[ -z "$HOST" ]]; then
+	# No host specfied
+	printf "\nNo host specified"
+	print_help
+	exit $STATE_UNKNOWN
 fi
 
+if [[ -z "$PORT" ]]; then
+	# No port specified
+	printf "\nNo port number specified"
+	print_help
+	exit $STATE_UNKNOWN
+fi
+
+
+### MAIN ###
+
+#Test if the server is up and running
+QSTAT_TEST=`quakestat -u -default q2s ${HOST}:${PORT} | grep "${HOST}"`
+
+#Let's see if the above command was succesful or not
+if [[ $? == 0 ]]; then
+	printf "Q2 on port $PORT - OK\n" 
+	exit $STATE_OK
+
+#See if we wanted a warning instead of a critical
+elif [[ "$warning" == "yes" ]]; then
+		printf "Q2 on port $PORT - WARNING\n"
+		exit $STATE_WARNING
+#Critical
+else	
+
+  printf "Q2 on port $PORT - CRITICAL\n"
+  exit $STATE_CRITICAL
+fi
+
+exit 3