OpenDNS updater

opendns.sh

#!/bin/sh

# Author: bluej774
# http://ubuntuforums.org/showthread.php?t=693788

UNAME=USERNAME		# username
PWORD=PASSWORD		# password (plaintext, sorry!)
TEMP=`mktemp`		# temporary file
ERROR=5			# times to retry
 
trap cleanup 1 2 3 6
cleanup()
{
   rm $TEMP
   exit 1
}
 
update()
{
	wget --quiet -O $TEMP 'https://'$UNAME':'$PWORD'@updates.dnsomatic.com/nic/update?'
 
	if [ `cat $TEMP | grep -c good` = 1 ] || [ `cat $TEMP | grep -c nochg` = 1 ]
	then
		logger OpenDNS updated successfully
	else
		while [ $ERROR -gt 0 ]; do
			ERROR=$(($ERROR-1))
			sleep 10s
			update
		done
		logger OpenDNS update failed
	fi
}
 
update
rm $TEMP
exit 0