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List:       linux-kernel
Subject:    Re: [RFC][PATCH] scripts with stdin replaced
From:       Richard Guenther <zxmpm11 () student ! uni-tuebingen ! de>
Date:       1999-07-06 8:30:10
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On Mon, 5 Jul 1999, Jamie Lokier wrote:

> No, /proc/self/fd/3 is not an ordinary symlink although it looks like
> one to `ls'.  It always reopens the correct file.  Programs do not have
> to be changed, and it doesn't have the same race condition as passing
> the filename.

Ok, if it is that simple, why do we pass the filename rather than
/proc/fd/something in binfmt_script? I can't see that it would break
anything, apart from some user not careing about procfs-support
(which could be wrapped by an #ifdef though).
Expect a patch for this tomorrow. Btw. is this file-passing really
race-free? I.e. could we safely enable suid-bits for scripts with
/proc/fd passing?

Richard.

--
Richard Guenther <richard.guenther@student.uni-tuebingen.de>
PGP: 2E829319 - 2F 83 FC 93 E9 E4 19 E2 93 7A 32 42 45 37 23 57
WWW: http://www.anatom.uni-tuebingen.de/~richi/


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