Xref: utzoo comp.unix.questions:9177 comp.lang.c:12515
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From: maart@cs.vu.nl (Maarten Litmaath)
Newsgroups: comp.unix.questions,comp.lang.c
Subject: Re: General Unix/C question
Keywords: userid Make su segmentation core
Message-ID: <1377@solo7.cs.vu.nl>
Date: 9 Sep 88 18:23:14 GMT
References: <641@jura.tcom.stc.co.uk> <794@philmds.UUCP>
Reply-To: maart@cs.vu.nl (Maarten Litmaath)
Organization: VU Informatica, Amsterdam
Lines: 15

In article <794@philmds.UUCP> leo@philmds.UUCP (Leo de Wit) writes:
\            2) when you start the program the input/output redirection is
\done, perhaps by your shell. This means that these input/output streams
\must be readable/writable by the current uid/gid; when you setuid &
\setgid the process may not be allowed anymore to write these
\descriptors.

That is simply not true: if you have an open file descriptor, you can write
to it (presuming it has been opened for writing).

Concerning the original problem: maybe an example will shed some light upon
the matter?
-- 
    Alles klar,                       |Maarten Litmaath @ Free U Amsterdam:
                   Herr Kommissar?    |maart@cs.vu.nl, mcvax!botter!maart