Re: if file exist

[Stefan Skoglund <stetson@ebox.tninet.se>]

Mark Biggar wrote:
> No, from a computer security point of view, this is exactly what is
> wanted.  A user should see absolutely no difference between "file does
> not exist" and "you don't have permission to see the file".  Otherwise,
> you have introduced a covert information channel.

Hrmm, rather flimsy security in that case.
Security-by-obscurity doesn't work.

In that case a simple 'ls filename' on unix
will give a not enough permissions message
'ls `dirname filename`' will tell if we are having
a directory permissions problem.