From ad5456f6e5e3bf3850c431a2cc8a1104ba27925c Mon Sep 17 00:00:00 2001
From: Alexander Sulfrian <alexander@sulfrian.net>
Date: Fri, 20 Sep 2013 15:23:38 +0200
Subject: add timeout

---
 check_snmp_switch_traffic.pl | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/check_snmp_switch_traffic.pl b/check_snmp_switch_traffic.pl
index b38dc58..d1e9194 100755
--- a/check_snmp_switch_traffic.pl
+++ b/check_snmp_switch_traffic.pl
@@ -109,17 +109,24 @@ sub nagios_die ($) {
 my $host;
 my $port = 161;
 my $community = 'public';
+my $timeout = 10;
 my $help = 0;
 
 Getopt::Long::Configure ("bundling");
 GetOptions('host|H=s'      => \$host,
            'port|p=i'      => \$port,
            'community|C=s' => \$community,
+           'timeout|t=i'   => \$timeout,
            'help|?'        => \$help)
 or pod2usage(2);
 pod2usage(0) if $help;
 pod2usage(2) unless (defined $host);
 
+$SIG{'ALRM'} = sub {
+    nagios_die('Check timed out');
+};
+alarm($timeout);
+
 my ($session, $err) = Net::SNMP->session(
     -hostname => $host,
     -port => $port,
@@ -154,6 +161,7 @@ check_snmp_swtich_traffic --host|-H HOSTNAME [options]
 
   --port|-p PORT
   --community|-C COMMUNITY
+  --timeout|-t TIMEOUT
   --help|-?
 
 =head1 OPTIONS
@@ -172,6 +180,11 @@ Port to connect to. If not specified it defaults to 161.
 
 SNMPv1 Community string. If not specified it defaults to "public".
 
+=item B<--timeout|-t>
+
+Maximum runtime in seconds of this script before returning UNKNOWN.
+If not specified it defaults to 10.
+
 =item B<--help|-?>
 
 Display a help message about the available options.
-- 
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