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From: gwyn%brl-vld@sri-unix.UUCP
Newsgroups: net.unix-wizards
Subject: Re:  Access rights for suid programs. - (nf)
Message-ID: <14917@sri-arpa.UUCP>
Date: Fri, 23-Dec-83 04:09:45 EST
Article-I.D.: sri-arpa.14917
Posted: Fri Dec 23 04:09:45 1983
Date-Received: Mon, 26-Dec-83 04:12:09 EST
Lines: 12

From:      Doug Gwyn (VLD/VMB) <gwyn@brl-vld>

UNIX System V SCCS utilities rely on the UID rules you described to
permit a set-UID-to-archive-owner access interface program to allow
controlled access to SCCS archives.  Without the ability to change
effective UID back to the original set-UID value, z.* lock files cannot
be removed from the archive directory since at that point the process
has the real UID for its effective UID (to create extracted sources with
appropriate ownership).

I discovered this the hard way and am trying to figure out how to work
around the problem on the non-USG systems I have access to.