Added sanity checks, updated version number and README file

README

@@ -1,14 +1,16 @@
 check_quake.sh
 
-This is meant to be a Nagios plugin to monitor Quake servers. Currently only
+This is a Nagios plugin to monitor Quake servers. Currently only Quake II 
-Quake II server are supported, but it's easy to to any types of servers that
+servers are supported, but more games will be added in the future.
-are supported by qstat. This plugin uses qstat to do all the queries.
+This plugin uses qstat to do all the queries.
+The plugin complies with the Nagios Plugin Development Guidelines. It has
+some basic sanity checks, uses the default exit codes, follows the standard 
+arguments, has only one line of output etc.
 
-Note that this plugin does NOT yet comply with the Nagios Plugin Development 
-Guidelines (for example missing some sanity checks).
 The plugin is in use by myself to monitor a friends Quake II server and is 
 working nicely.
 
+
 Options:
 -h
    Print detailed help screen
@@ -16,7 +18,7 @@ Options:
    Print version information
 -H 
    Set the host/IP of the server to watch
--P
+-p
    Set the port number of the Quake server to watch
    Default is 27910
 --warning

check_quake.sh

@@ -29,9 +29,12 @@
 #                                                                             #
 ###############################################################################
 
-VERSION="0.1"
+VERSION="0.2"
 AUTHOR="(c) 2012 Jack-Benny Persson (jack-benny@cyberinfo.se)"
 
+# Qstat binary
+QSTAT=/usr/bin/quakestat
+
 # Exit codes
 STATE_OK=0
 STATE_WARNING=1
@@ -43,6 +46,14 @@ PORT=27919
 
 shopt -s extglob
 
+# Sanity checks
+if [[ ! -x "$QSTAT" ]]; then
+	printf "It appears you don't have the qstat package installed in\
+ $QSTAT\n"
+	exit $STATE_UNKNOWN
+fi
+
+
 #### Functions ####
 
 # Print version information
@@ -66,7 +77,7 @@ Options:
    Print version information
 -H 
    Set the host/IP of the server to watch
--P
+-p
    Set the port number of the Quake server to watch
    Default is 27910
 --warning
@@ -106,7 +117,7 @@ while [[ -n "$1" ]]; do
            shift 2
            ;;
 
-       -P)
+       -p)
            if [[ -z "$2" ]]; then
                 printf "\nOption $1 requires an argument\n"
 		print_help