Try Expect.  It is a tcl based language that is meant for automating interactive 
programs (amongst other things) like cvs, telnet, ssh, etc...

> Thank you.  That gave me an idea to use the length of the string of
> differences and if >0,  then it does stuff.
> 
> Now, part two.
> Can someone please tell me how to pass a password to cvs for logging
> into a pserver?

>>>Hello all. I was wondering if anyone knew how to do an if statement in
>>>bash to see if results were returned?  I want to write a bash script to
>>>run hourly that will grep my mailbox for a certain text if the results
>>>are different than the contents of another, previous output, then runn
>>>another command.  Somethinng like:
>>>
>>>cat file|grep Text>/tmp/NewText.grep
>>>diff /tmp/NewText.grep /tmp/Text.grep
>>>if( diff returned anything ) ./runme
>>>mv /tmp/NewText.grep /tmp/Text.grep
>>>
>>>I just don't know what if switches are available (to use) in bash.
>>>Thank you.
>>>
>>
>>Here's a sample bash script I wrote:
>>
>>SIZE=`ls -l $HOME | grep tvguide.all.html | awk '{ print $5 }'`
>>GT=`expr $SIZE \> $MINSIZE`
>>if [ "$GT" -eq 1 ]
>>then
>>   mv -f ./tvguide.all.html $DEST/tvguide.all.html
>>fi