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From: Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: standards and 'setgid' function
Date: Wed, 02 Jan 2002 22:56:39 -0700
Organization: Systematic Software
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On 2 Jan 2002 15:11:11 GMT, Hans-Bernhard Broeker
<broeker AT physik DOT rwth-aachen DOT de> wrote:

>HARY <Hary AT address DOT is DOT invalid> wrote:
>> Hi,
>
>> While looking in docs for 'setgid' description i found that linux man
>> says: "CONFORMING TO: SVr4, SVID", but djgpp info states: "Portability:
>> not ANSI, POSIX"
>
>> These don't match, so who is right here? And what "SVID" is?
>
>They're both right.  setgid is specified by POSIX, but Linux only
>follows the exact details of that specification if you explicitly ask
>for that (see the text of their man page).  By default, it follows
>"System V" semantics.
>
>DJGPP implements POSIX behaviour (but usually fails the call, as if
>you were on a system were only one group was defined at all).
>
>SVID is "System V Interface Definition" or something equivalent, IIRC.

DJGPP only returns and accepts 42 for uid or gid -- so only
setuid(getuid()) and setgid(getgid()) are valid! 

Thanks. Take care, Brian Inglis 	Calgary, Alberta, Canada
-- 
Brian DOT Inglis AT CSi DOT com 	(Brian dot Inglis at SystematicSw dot ab dot ca)
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