>>>>> On Mon, 23 Oct 2006 21:20:41 +0930,
      Brett Lymn <blymn@baesystems.com.au> said:

> At a guess, in your case, it could be the address of the file node in
> memory... it really does not matter as long as it's unique :)

Mm.  How to check the validity of an address which is supplied by
a remote server as part of a filehandle in that case?
If you cannot check it, remote server can easily crash the machine,
or may be able to peak some part of the kernel memory, even.
-- 
soda