Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!think!samsung!cs.utexas.edu!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.unix.wizards
Subject: Re: SUID directories -- security concern?
Message-ID: <2946@auspex.auspex.com>
Date: 18 Feb 90 02:13:02 GMT
References: <14198@s.ms.uky.edu> <12157@smoke.BRL.MIL>
Organization: Auspex Systems, Santa Clara
Lines: 11


 >>I've never seen any code to make use of a SUID directory, ...
 >
 >It can't be set-UID.  Probably if it has a meaning (which I cannot tell
 >without access to your system source) it is "only the owner is permitted
 >to remove entries from this directory".  That sort of thing is a fairly
 >common extension to the standard UNIX file permissions scheme.

The common extension of that flavor with which I'm familiar uses the
"sticky bit" rather than the set-UID bit - at least it does in 4.3BSD
and System V Release 3.2.