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From: root@conexch.UUCP (Larry Dighera)
Newsgroups: comp.unix.questions
Subject: Re: File Write Permission Rules
Summary: It is rumored that release 4 will support the suid bit on directories
Keywords: file write permission rules
Message-ID: <23095@conexch.UUCP>
Date: 15 Feb 89 19:42:23 GMT
References: <306@wubios.wustl.edu> <249@ibd.BRL.MIL> <1995@lindy.Stanford.EDU> <630@jonlab.UUCP>
Reply-To: root@conexch.UUCP (Larry Dighera)
Organization: The Consultants' Exchange, Orange County, CA.  (714) 842-6348
Lines: 27

In article <630@jonlab.UUCP> jon@jonlab.UUCP (Jon H. LaBadie) writes:
<This is a future direction of UNIX question.
<
<I stumbled upon a system with /tmp directory permissions as follows:
<
<	drwsrwxrwx ......
<
<Note the "s". 
<[...] namely a meaning for the set user id bit on directories.
<The meaning?  Anyone could create files in the directory,
<but only the owner of the directory, OR the owner of the individual
<files could remove them.
<So, the questions:
<	1. Anyone know of the future fate of this useful tweak?

At a presentation to the Orange County Unix Users Group last month the
AT&T speaker mentioned that Release 4 will support use of the suid bit
on directories.  He didn't elaberate on its use, but I'll bet this is it.

Larry Dighera


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