#!/usr/bin/perl

# Pandora FMS Plugin to get memory information on Linux
# (c) 2014 Sancho Lerena <slerena@artica.es

use POSIX;

my $TOTAL=`vmstat -s | grep "total memory" | awk  '{ print $1 } '`;
my $FREE=`vmstat -s | grep "free memory" | awk  '{ print $1 } '`;
my $FREEP=($FREE/$TOTAL)*100; 
my $STOTAL=`vmstat -s | grep "total swap" | awk  '{ print $1 } '`;
my $SUSED=`vmstat -s | grep "free swap" | awk  '{ print $1 } '`;
my $SFREE=($SUSED/$STOTAL)*100;

$SFREE = floor($SFREE); 
$FREEP = floor($FREEP);

print "<module>\n";
print "<name>FreeMemory</name>\n";
print "<type>generic_data</type>\n";
print "<description>Free memory %</description>\n";
print "<unit>%</unit>\n";
print "<min_critical>0</min_critical>\n";
print "<max_critical>5</max_critical>\n";
print "<data>$FREEP</data>\n";
print "</module>\n";

print "<module>\n";
print "<name>FreeSwap</name>\n";
print "<type>generic_data</type>\n";
print "<description>Free Swapy %</description>\n";
print "<unit>%</unit>\n";
print "<min_critical>0</min_critical>\n";
print "<max_critical>10</max_critical>\n";
print "<data>$SFREE</data>\n";
print "</module>\n";