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Re: rm: avoiding a race condition on non-glibc systems


From: Andreas Schwab
Subject: Re: rm: avoiding a race condition on non-glibc systems
Date: Fri, 13 May 2005 14:28:05 +0200
User-agent: Gnus/5.110003 (No Gnus v0.3) Emacs/22.0.50 (gnu/linux)

Jim Meyering <address@hidden> writes:

> In reviewing parts of remove.c I noted (again) the race condition on
> systems with an unlink that may remove directories, so added this comment:
>
> +/* If anyone knows of another system for which unlink can never
> +   remove a directory, please report it to address@hidden
> +   The code below is slightly more efficient if it *knows* that
> +   unlink(2) cannot possibly unlink a directory.  */
>
> On non-glibc systems that race condition means that there's a window
> via which a privileged rm user might be tricked into unlinking a
> nonempty directory.

Why do you think that has anything to do with glibc?

Andreas.

-- 
Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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