POSIX Shell Script to Update ovh dyndns.

dyndns.ovh

#!/bin/sh

error () {
  echo "error: $1"
  usage
}

usage () {
 echo "usage: $0 -u <username> -p <password> -d <domain> -i <seconds> <subdomain>";
 exit 1
}

INTERVAL=0

while [ $# -gt 0 ]; do
  key="$1"

  case $key in
    -u|--user)
      USERNAME="$2"
      shift
      shift
      ;;
    -p|--password)
      PASSWORD="$2"
      shift
      shift
      ;;
    -d|--domain)
      DOMAIN="$2"
      shift
      shift
      ;;
    -i|--interval)
      INTERVAL="$2"
      shift
      shift
      ;;
    -h|--help)
      usage
      ;;
    *)
      SUBDOMAIN="$1"
      shift
      ;;
  esac
done

[ -z "${USERNAME}" ] && error "username required"
[ -z "${PASSWORD}" ] && error "password required"
[ -z "${DOMAIN}" ] && error "domain required"
[ -z "${SUBDOMAIN}" ] && error "subdomain required"
[ "$INTERVAL" -eq "$INTERVAL" ] || error "invalid interval $INTERVAL"

while true; do
wget -nv -O - --user "$DOMAIN-$USERNAME" --password "$PASSWORD" "https://www.ovh.com/nic/update?system=dyndns&hostname=${SUBDOMAIN}.$DOMAIN"
[ "$INTERVAL" -eq "0" ] && break
sleep "$INTERVAL"
done