Crude script to update an AWS Route53 entry from cron

update_aws_route53_ddns

#!/usr/bin/php
<?php
# crude script to update an AWS Route53 entry from cron

$hostname = "homer";
$domain = "simpsons.org";

$ip = chop(`curl -s http://www.telize.com/ip`);
$r53ip = chop(`cli53 rrlist $domain | grep $hostname | awk '{print $5}'`);

if ($ip != $r53ip) {
        $r = `cli53 rrdelete $domain $hostname A --wait`;
        $r = `cli53 rrcreate $domain $hostname A $ip --ttl 600`;

        if (!preg_match('/INFO\s+Success/', $r)) {
                print "Error updating DDNS: ".$r."\n";
        } # silent on success for cron
} 

exit(0);