update cloudns ddns from plain OpenWRT

cloudns_update

#!/bin/ash

CURRENT_IP=$(wget -q http://whatismyip.akamai.com/ -O -)
CLOUDNS_HANDLE="example.com" # <<<--- YOUR DNS NAME
CLOUDNS_SERVER=109.201.133.194 # DNS SERVER

echo "current IP: $CURRENT_IP"
DNS_IP=$(nslookup $CLOUDNS_HANDLE $CLOUDNS_SERVER | awk '/guest-wan.pw.cloudns.pro/,/Address/' | grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')
echo "DNS IP: $DNS_IP"

case $DNS_IP in
  "$CURRENT_IP")
    exit 0
  ;;
  *)
    URL="XXX" #  <<<--- THIS IS YOU API TOKEN FROM CLOUDNS DASHBOARD
    wget -q http://ipv4.cloudns.net/api/dynamicURL/?q="$URL" -O /dev/null
  ;;
esac