From 81ae39dfc0533508694119e19568906911ca8901 Mon Sep 17 00:00:00 2001
From: Stig Sandbeck Mathisen <ssm@fnord.no>
Date: Wed, 23 Jan 2013 10:31:30 +0100
Subject: [PATCH] Test for values of $warning and $critical before try emitting
 them

---
 plugins/network/ping/ping | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/plugins/network/ping/ping b/plugins/network/ping/ping
index 1742a91c..858fb6d3 100755
--- a/plugins/network/ping/ping
+++ b/plugins/network/ping/ping
@@ -166,8 +166,10 @@ for (my $host_i = 0; $host_i < @host_addrs; ++$host_i) {
 			print "$h_norm_name.min 0\n$h_norm_name.label $h_cur_name\n$h_norm_name.draw LINE2\n";
                         my ( $warning, $critical ) =
                             get_thresholds($h_norm_name);
-                        printf "%s.warning %s\n",  $h_norm_name, $warning;
-                        printf "%s.critical %s\n", $h_norm_name, $critical;
+                        printf "%s.warning %s\n", $h_norm_name, $warning
+                            if $warning;
+                        printf "%s.critical %s\n", $h_norm_name, $critical
+                            if $critical;
 		} else {
 			my $pid = $fork ? fork() : -1;
 			if ($pid <= 0) {