#!/usr/bin/bash
#
# NFS stale mounts monitor plugin for Nagios
# Written by Thomas Sluyter (nagios@kilala.nl)
# By request of KPN-IS, i-Provide, the Netherlands
# Last Modified: 13-07-2006
# 
# Usage: ./check_nfs_stale
#
# Description:
# This script couldn't be simpler than it is. It just checks to see
# whether there are any stale NFS mounts present on the system. 
#
# Limitations:
#   This script should work properly on all implementations of Linux, Solaris
# and Mac OS X.
#
# Output:
# If there are stale NFS mounts, a CRIT is issued.
#

# You may have to change this, depending on where you installed your
# Nagios plugins
PROGNAME="check_nfs_stale"
PATH="/usr/bin:/usr/sbin:/bin:/sbin"
LIBEXEC="/usr/local/nagios/libexec"
. $LIBEXEC/utils.sh


### REQUISITE NAGIOS COMMAND LINE STUFF ###

print_usage() {
	echo "Usage: $PROGNAME"
	echo "Usage: $PROGNAME --help"
}

print_help() {
	echo ""
	print_usage
	echo ""
	echo "NFS stale mounts monitor plugin for Nagios"
	echo ""
	echo "This plugin not developped by the Nagios Plugin group."
	echo "Please do not e-mail them for support on this plugin, since"
	echo "they won't know what you're talking about :P"
	echo ""
	echo "For contact info, read the plugin itself..."
}

while test -n "$1" 
do
	case "$1" in
	  --help) print_help; exit $STATE_OK;;
	  -h) print_help; exit $STATE_OK;;
	  *) print_usage; exit $STATE_UNKNOWN;;
	esac
done

[ `df -k | grep "Stale NFS file handle" | wc -l` -gt 0 ] && (echo "NOK - Stale NFS mounts."; exit $STATE_CRITICAL)

# Nothing caused us to exit early, so we're okay.
echo "OK - No stale NFS mounts."
exit $STATE_OK