From: Michael Insel <michael@insel.email>
Date: Fri, 8 Feb 2019 15:57:19 +0000 (+0100)
Subject: Fix check_swap percentage calculation
X-Git-Tag: v2.10.3~30
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=df68e65f0553f9ad314249930a08fb35cb065774;p=icinga2

Fix check_swap percentage calculation

This fixes the check_swap percentage calculation. When the pagefile is
turned off the available swap and total swap are 0 which leads to a
wrong calculation and misformated output.

refs #6913

(cherry picked from commit 4961e9ba62eebcfc1cf22e1840b289e4eab067d2)
---

diff --git a/plugins/check_swap.cpp b/plugins/check_swap.cpp
index 302f20b46..7579073b7 100644
--- a/plugins/check_swap.cpp
+++ b/plugins/check_swap.cpp
@@ -229,7 +229,10 @@ static int check_swap(printInfoStruct& printInfo)
 		printInfo.aSwap += round(pageFiles.at(i).availableSpwap / pow(1024.0, printInfo.unit));
 	}
 
-	printInfo.percentFree = 100.0 * printInfo.aSwap / printInfo.tSwap;
+	if (printInfo.aSwap > 0 && printInfo.tSwap > 0)
+		printInfo.percentFree = 100.0 * printInfo.aSwap / printInfo.tSwap;
+	else
+		printInfo.percentFree = 0;
 
 	return -1;
 }