setdnstarget.sh

#!/bin/sh

IPFILE=/tmp/myip.txt
OLDIP=`cat $IPFILE`
MYIP=`/sbin/ifconfig ppp0  | grep inet | sed 's/.*inet addr:\([^ ]*\).*/\1/'`
CLIENT_ID=*****
API_KEY=*****
DOMAIN_ID=*****
RECORD_ID=*****

if [ "$MYIP" != "$OLDIP" ];
then
  echo "IP address changed from $OLDIP to $MYIP"
#  wget -O - -q "https://api.linode.com/?api_key=$API_KEY&api_action=domain.resource.update&domainid=$DOMAIN_ID&resourceid=$RECORD_ID&target=$MYIP"
  wget -O - -q "https://api.digitalocean.com/domains/$DOMAIN_ID/records/$RECORD_ID/edit?data=$MYIP&client_id=$CLIENT_ID&api_key=$API_KEY"
  echo $MYIP > $IPFILE
fi