diff -r 000000000000 -r 3387351ebb0e check_release.pl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/check_release.pl	Wed Jul 28 16:24:58 2010 +0200
@@ -0,0 +1,114 @@
+#!/usr/bin/perl -w
+
+use strict;
+use File::Basename;
+use Getopt::Long;
+use LWP::Simple;
+
+use lib "/usr/lib/nagios/plugins";
+use utils qw (%ERRORS &print_revision &support);
+
+my $ME      = basename $0;
+my $VERSION = "1.1";
+my $USAGE   = <<EOF;
+Usage: $ME [-u | --url]
+       $ME [-s | --search]
+	   $ME [-f | --file]
+       $ME [-h | --help]
+       $ME [-V | --version]
+EOF
+
+my $opt_url    = "http://www.debian.org/releases/stable/index.html";
+my $opt_search = "<p>Debian GNU/Linux";
+my $opt_file   = "/etc/debian_version";
+my ($found, $current_release, $current_majornr,  $stable_release, $stable_majornr, @website);
+
+sub check_status();
+sub print_help();
+sub print_usage();
+
+MAIN: {
+    Getopt::Long::Configure('bundling');
+    GetOptions(
+        "u|url"    => \$opt_url,
+        "s|search" => \$opt_search,
+		"f|file"   => \$opt_file,
+        "h|help"   => sub { print_help(); exit $ERRORS{OK}; },
+        "V|version" =>
+          sub { print_revision( $ME, $VERSION ); exit $ERRORS{OK}; },
+    );
+
+	# get current release number
+	unless ( -r $opt_file ) {
+		print "RELEASE CRITICAL: $opt_file not exists or not read permission is granted\n";
+		exit $ERRORS{"CRITICAL"};
+	}
+
+	open(CR, "<$opt_file");
+	while(<CR>) {
+		chomp;
+		$current_release = $_;
+		$current_release =~ /^(\d)+.*/;
+		$current_majornr = $1;
+	}
+	close(CR);
+
+	# download the website
+	push @website, split("\n", get($opt_url));
+
+	foreach (@website) {
+		unless ($found) {
+			/$opt_search/ or next;
+			$found = $_;
+			next;
+		}
+	}
+
+	# get stable release number
+	if ($found =~ /$opt_search\s+([\d\.]+).*/) {
+		$stable_release = $1;
+		$stable_release =~ /^(\d)+.*/;
+		$stable_majornr = $1;
+	}
+
+	check_status();
+
+}
+
+sub check_status() {
+	if ($stable_release eq $current_release) {
+		print "RELEASE OK: current release number $current_release\n";
+		exit $ERRORS{"OK"};
+	} elsif ($current_majornr < $stable_majornr) {
+		print "RELEASE CRITICAL: current release number $current_release / stable release number $stable_release\n";
+		exit $ERRORS{"CRITICAL"};
+	} else {
+		print "RELEASE WARNING: current release number $current_release / stable release number $stable_release\n";
+		exit $ERRORS{"WARNING"};
+	}
+}
+
+
+sub print_usage() { print $USAGE }
+
+sub print_help() {
+    print_revision( $ME, $VERSION );
+    print <<EOF;
+Copyright (c) 2010 Christian Arnold
+
+This plugin checks the current debian release number.
+
+$USAGE
+    -u, --url
+        URL where to search for the search string (default: http://www.debian.org/releases/stable/index.html)
+    -s, --search
+        search string on the url (default: '<p>Debian GNU/Linux')
+    -f, --file
+        file with current release informations (default: /etc/debian_version)
+    -h, --help
+        print detailed help screen
+    -V, --version
+        print version information
+EOF
+    support();
+}