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	Sat, 11 Jul 1998 09:26:00 +1000
Date: Sat, 11 Jul 1998 09:26:00 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199807102326.JAA27469@godzilla.zeta.org.au>
To: bde@zeta.org.au, ghelmer@scl.ameslab.gov
Subject: Re: cvs commit: src/usr.bin/msgs msgs.c
Cc: cvs-committers@FreeBSD.ORG, imp@village.org, roberto@keltia.freenix.fr
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>From ghelmer@scl.ameslab.gov  Fri Jul 10 23:54:57 1998
>Return-Path: <ghelmer@scl.ameslab.gov>
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>Date: Fri, 10 Jul 1998 08:54:34 -0500 (CDT)
>From: Guy Helmer <ghelmer@scl.ameslab.gov>
>To: Bruce Evans <bde@zeta.org.au>
>cc: imp@village.org, roberto@keltia.freenix.fr,
>        Guy Helmer <ghelmer@scl.ameslab.gov>, cvs-committers@FreeBSD.ORG
>Subject: Re: cvs commit: src/usr.bin/msgs msgs.c
>In-Reply-To: <199807092153.HAA02835@godzilla.zeta.org.au>
>Message-ID: <Pine.SGI.3.96.980710083740.2987F-100000@demios.scl.ameslab.gov>
>MIME-Version: 1.0
>Content-Type: TEXT/PLAIN; charset=US-ASCII
>Status: RO
>
>On Fri, 10 Jul 1998, Bruce Evans wrote:
>
>> >: We haven't been using POSIX saved uids for more than two years now IIRC...
>> >: 
>> >: kern.saved_ids: 0
>> >
>> >Yes.  That's one of the hazards of importing fixes wholesale from
>> >OpenBSD.  They do have saved ids, and they have needed to fix things
>> >in a posixly correct way.
>> 
>> A POSIXly correct way would handle all possible settings of
>> _POSIX_SAVED_IDS.  Configuration for the case where _POSIX_SAVED_IDS
>> is set is difficult because the configuring entity must read the
>> system documentation to determine what "appropriate privilege" means
>> and generate code to handle any mismatches between the system's
>> idea of appropriate privilege and what the application expects :-).
>
>So, as I understand it now, the change 
>
>        seteuid(uid = getuid());
>        setuid(uid);
>
>should be reverted to the original
>
>        setuid(uid = getuid());
>
>It seemed like an innocuous change. Thanks for catching this and educating
>me. 
>
>Guy Helmer
>
>Guy Helmer, Graduate Student, Iowa State University Dept. of Computer Science 
>Research Assistant, Ames Laboratory       ---         ghelmer@scl.ameslab.gov
>http://www.cs.iastate.edu/~ghelmer
>

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