#!/bin/sh
registered="0.0.0.0"

max_days=10 # max number of days to go without forcing an update
last_update=`date +%s`

max_seconds=`expr $max_days*24*60*60`

while :; do
        current=$(wget -O - http://checkip.dyndns.org|sed s/[^0-9.]//g)

        if [ $(($last_update+$max_seconds)) -lt `date +%s` ]
        then
                # set old_ip to be different, forcing an update
                registered="0.0.0.0"
        fi
        if [ "$current" != "$registered" ]
        then
                updatedd ovh -- --ipv4 $current user:psw public_URL
                registered=$current
                last_update=`date +%s`
        fi
        sleep 300
done