update ddns on OVH

ddns-update

#!/bin/sh

###
# Based on 
# https://github.com/RMerl/asuswrt-merlin/wiki/Custom-DDNS#google-domains
# https://github.com/RMerl/asuswrt-merlin/wiki/Custom-DDNS#bind9-ddns-using-nsupdate
###

set -u

U=USER
P=****
IP=$1

# args: username password hostname ip
ovh_dns_update() {
  CMD=$(curl -s -u "$U":"$P" "https://www.ovh.com/nic/update?system=dyndns&hostname=$1&myip=$IP")
  case "$CMD" in
    good*|nochg*) echo "Updated $1 to $IP" ;;
    *) echo "During updating $1 to $IP, error: $CMD" ;;
  esac
}

ovh_dns_update domain.pl

exit 0