SQL & PL/SQL

I know this is not an oracle product but i know alot of people here use this.

I have it/use it/love it thanks Chris Poole!!

Wondered if someone could help me with a problem i am faced with.

We put files on a FTP site that others use to download via FTP. I created a program that basically uses the FTP package to interrogate the directory (ftp.list)
insert the entries into a table and download them to the users site.

This works apart from occasionally people will replace a file. I need to somehow pick up on the file size/date stamp change on the file?

Anyone know how/if I can achieve this.. I can download to temp location if FTP unable to do before hand?

Thanks