check_linux_openFiles

#!/bin/bash

Syntax()
{
   echo " "
   echo "  Command Syntax: check_linux_openFiles [-H host] [-c val] [-w val]"
   echo " "
   exit 3;
}

if [[ $# -ne 6 ]]
then
  Syntax
fi

valw=0
valc=0
host=""

while [[ $# > 0 ]]
do
   par=$1
   case $par in
     -c) shift
         valc=$1;;
     -w) shift
         valw=$1;;
     -H) shift
         host=$1;;
     -h) shift
         Syntax
         exit;;
      *) shift;;
   esac
done

maxHandles=$(ssh nagios@$host "cat /proc/sys/fs/file-max")
if [[ -z $maxHandles ]]
then
	echo "SSH Error"
	exit 3
fi

usedHandles=$(ssh nagios@$host "cat /proc/sys/fs/file-nr | cut -d$'\t' -f 1")
if [[ -z $usedHandles ]]
then
	echo "SSH Error"
	exit 3
fi

percentageUsed=$(echo "$usedHandles $maxHandles" | awk '{printf "%.2f", (($1 / $2) * 100)}')

exitCode=0
status="OK"

if (( $(echo "$percentageUsed > $valw" | bc -l) ))
then
	exitCode=1
	status="WARNING"
fi

if (( $(echo "$percentageUsed > $valc" | bc -l) ))
then
	exitCode=2
	status="CRITICAL"
fi

echo "OpenFiles $status :: Percentage of file handles used:  $percentageUsed% | OpenFiles=$percentageUsed%"