From 94ddb039ec694926c2867099e8dc38efc8ae3f8a Mon Sep 17 00:00:00 2001
From: Imanol-Mikel Barba Sabariego <imanol@imanolbarba.net>
Date: Mon, 13 Jun 2016 10:37:28 +0200
Subject: [PATCH] Fixed memfree linux

---
 check_memfree/check_memfree.cpp | 49 +++++++++++++++++++++++++++++++++++++------------
 check_memfree/check_memfree.h   |  9 ++++++++-
 2 files changed, 45 insertions(+), 13 deletions(-)

diff --git a/check_memfree/check_memfree.cpp b/check_memfree/check_memfree.cpp
index b505220..569970a 100755
--- a/check_memfree/check_memfree.cpp
+++ b/check_memfree/check_memfree.cpp
@@ -4,6 +4,36 @@ using namespace std;
 
 char *servicename = (char*)"MEMORY";
 
+void getMem(ifstream *file, MEMINFO *meminfo)
+{
+	meminfo->freeMem = 0;
+	meminfo->totalMem = 0;
+	string line, field, value;
+	getline(*file,line);
+	do
+	{
+		field = line.substr(0,line.find_first_of(':'));
+		value = line.substr(line.find_first_of(' '),line.find_last_of(' '));
+		if(field == "MemTotal")
+		{
+			meminfo->totalMem = str2int(value);
+		}
+		else if(field == "MemFree")
+		{
+			meminfo->freeMem += str2int(value);
+		}
+		else if(field == "Buffers")
+		{
+			meminfo->freeMem += str2int(value);
+		}
+		else if(field == "Cached")
+		{
+			meminfo->freeMem += str2int(value);
+		}
+		getline(*file,line);
+	}while(!file->eof());
+}
+
 int getNum(ifstream *file)
 {
 	string numStr = "";
@@ -104,21 +134,15 @@ int main(int argc, char **argv)
 		return 3;
 	}
 
-	double freeMem = 0;
-	double totalMem = 0;
-
-	ifstream meminfo(MEMINFO);
+	MEMINFO meminfo;
+	ifstream meminfo_file(MEMINFO_FILE);
 
-	totalMem = getNum(&meminfo);
-	freeMem += getNum(&meminfo);
-	getNum(&meminfo);
-	freeMem += getNum(&meminfo);
-    freeMem += getNum(&meminfo);
+	getMem(&meminfo_file,&meminfo);
 
-	meminfo.close();
+	meminfo_file.close();
 
-	int freeMemMB = freeMem / 1024;
-	int totalMemMB = totalMem / 1024;
+	int freeMemMB = meminfo.freeMem / 1024;
+	int totalMemMB = meminfo.totalMem / 1024;
 	int percFree = ((double)freeMemMB/(double)totalMemMB)*100;
 
 	range warningLimit, criticalLimit;
@@ -156,3 +180,4 @@ int main(int argc, char **argv)
 	cout << " - " << percFree << "% free (" << freeMemMB << " MB out of " << totalMemMB << " MB) |memory=" << freeMemMB << "MB;" << warningLimit.max << ";" << criticalLimit.max << ";" << "0;" << totalMemMB << endl;
 	return returnCode;
 }
+
diff --git a/check_memfree/check_memfree.h b/check_memfree/check_memfree.h
index 60091d6..e4c46e4 100755
--- a/check_memfree/check_memfree.h
+++ b/check_memfree/check_memfree.h
@@ -16,11 +16,18 @@
 #include "range.h"
 #include "auxiliar.h"
 
-#define MEMINFO "/proc/meminfo"
+#define MEMINFO_FILE "/proc/meminfo"
 #define VERSION "1.0"
 
+struct meminfo {
+	ssize_t totalMem;
+	ssize_t freeMem;
+};
+typedef struct meminfo MEMINFO;
+
 int getNum(ifstream *file);
 void printVersion();
 void printHelp(bool longVersion);
 
 #endif
+
--
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