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Subject: Re: recursing through directories
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> From: Francesco Potorti` <pot@gnu.org>
> CC: emacs-devel@gnu.org
> Organization: 
> Date: Tue, 23 Apr 2002 11:45:16 +0200
> 
>    Not really, unfortunately.  ftw is standard, but it's a portability
>    hassle too.  In practice, there are real problems in running out of
>    file descriptors when descending into deeply nested directories.
> 
> Do you mean that there is an open file descriptor per directory level?

In some implementations, yes, I think so.

It's a tricky area.  If you use an open file descriptor per directory,
you can always get back to where you came from.  If not, then you can
run into other problems.