check_wp_update

#!/bin/bash
# Version 1.9.13 (Please check against: https://github.com/fredbradley/nagios-wordpress-updates-checker/blob/master/check_wp_update )
#
# The Nagios Check that works with https://github.com/fredbradley/nagios-wordpress-updates-checker/
#
# Please read the README.md at https://github.com/fredbradley/nagios-wordpress-updates-checker/
#
# Credit Nods: Inspired by check_wp_version by @hteske. Original here: http://exchange.nagios.org/directory/Plugins/CMS-and-Blog-Software/Wordpress/check_wp_version/details



CURL=`which curl`
CURL_OPTS='--user-agent check-wp-updates-nagios-plugin --insecure -L'
BASENAME=`which basename`
PROGNAME=`$BASENAME $0`

# Exit codes
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3

function jsonValue
{
	KEY=$1
	num=$2
	awk -F"[,:}]" '{for(i=1;i<=NF;i++){if($i~/'$KEY'\042/){print $(i+1)}}}' | tr -d '"' | sed -n ${num}p
}

function print_usage
{
	echo "Usage: $PROGNAME <URL>"
}

if [ ! $1 ]; then
	print_usage
	exit $STATE_CRITICAL
fi

# Check that we're getting a 200 OK message for the file file on the remote host.
response=`$CURL $CURL_OPTS -I $1`
if [[ $response != *"200 OK"* ]]; then
        echo 'CRITICAL - Checker Script not installed on remote host'
        exit $STATE_CRITICAL
fi

# Find out if we are getting a JSON response or the legacy text (html) response
if [[ $response == *"Content-Type: application/json"* ]]; then
	RESPONSE_TYPE="JSON"
else
	RESPONSE_TYPE="TEXT"
fi

# Save CURL output to $result variable
result=`$CURL $CURL_OPTS -s -X GET $1`

# If there's no result, then perhaps CURL isn't installed?
if [ $? != 0 ]; then
	echo 'CRITICAL - Check plugin does not work. Maybe you need to install curl.'
	exit $STATE_CRITICAL
else
	# Depending on the response type, then we get the content in a different way
	case "$RESPONSE_TYPE" in
		JSON)
			status=`echo ${result[$x]} | jsonValue status 1`
			text=`echo ${result[$x]} | jsonValue text 1`
		;;
		TEXT)
			status=`echo $result | cut -d\# -f1`
			text=`echo $result | cut -d\# -f2`
		;;
	esac

	# Echo out the output
	case $status in 
		CRITICAL|WARNING|OK)
			echo "$status - $text"
			;;
		*)
			echo "INVALID OUTPUT"
			;;
		esac

	# Finish in a Nagios friendly way!
	case "$status" in
		CRITICAL)
			exit $STATE_CRITICAL
			;;
		WARNING)
			exit $STATE_WARNING
			;;
		OK)
			exit $STATE_OK
			;;
		*)
			exit $STATE_CRITICAL
			;;
	esac
fi