From 2b66ed321efad71e2267028171358a641a6a852d Mon Sep 17 00:00:00 2001
From: Lars Kruse <devel@sumpfralle.de>
Date: Fri, 30 Mar 2018 04:10:14 +0200
Subject: [PATCH] plugin xen_cpu_v2: prevent "divide by zero"

Closes: #475
---
 plugins/xen/xen_cpu_v2 | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/plugins/xen/xen_cpu_v2 b/plugins/xen/xen_cpu_v2
index 75c9a951..aa58184c 100755
--- a/plugins/xen/xen_cpu_v2
+++ b/plugins/xen/xen_cpu_v2
@@ -171,8 +171,12 @@ while (($key, $value) = each %dom)
 	
 	# Calc a percentage based on the _total_ available CPU time
 	$tmp = 0;
-	$tmp = ( $dom{$key}->{'diff'} / $tcpuavail ) * 100;
-	$dom{$key}->{'pc_tcpu'} = sprintf("%.2f", $tmp);
+	if ($tcpuavail != 0) {
+		$tmp = ( $dom{$key}->{'diff'} / $tcpuavail ) * 100;
+		$dom{$key}->{'pc_tcpu'} = sprintf("%.2f", $tmp);
+	} else {
+		$dom{$key}->{'pc_tcpu'} = "U";
+	}
 	
 	if ( $debug )
 	{