Nagios NRPE plugin: Check the number of seconds since a file or directory was last modified

check_pathmtime.sh

#!/usr/bin/env bash

##
# @author Jay Taylor [@jtaylor]
#
# @date 2012-10-30
#
# @description Nagios NRPE plugin: Check the number of seconds since a file
# or directory was last modified.
#

DEFAULT_WARN_SECONDS=60
DEFAULT_CRIT_SECONDS=120


while getopts  'hp:c:w:' option; do
    case $option in
        h) help=1;;
        p) path=$OPTARG;;
        c) crit=$OPTARG;;
        w) warn=$OPTARG;;
    esac
done

if [ -n "$help" ] || [ -z "$path" ]; then
    echo "usage: $0 -p [path (required)] -w [warning threshhold seconds] -c [critical threshhold seconds]" 1>&2
    exit 4
elif ! [ -e "$path" ]; then
    echo "fatal: invalid or unreadable file path provided: $path" 1>&2
    exit 3
fi

if [ -z "$warn" ]; then
    warn=$DEFAULT_WARN_SECONDS
fi
if [ -z "$crit" ]; then
    crit=$DEFAULT_CRIT_SECONDS
fi

seconds=$(($(date +'%s') - $(stat --format='%Y' $path)))

if [ $seconds -gt $crit ]; then
    echo "CRITICAL: $path was last modified $seconds seconds ago"
    exit 1
elif [ $seconds -gt $warn ]; then
    echo "WARNING: $path was last modified $seconds seconds ago"
    exit 2
else
    echo "OK: $path was last modified $seconds seconds ago"
    exit 0
fi

Found this useful, thanks! But I think the exit codes for CRITICAL and WARNING are the wrong way around - it should be "exit 2" for CRITICAL and "exit 1" for WARNING: http://nagios-plugins.org/doc/guidelines.html#AEN78