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Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxj!houxm!whuxlm!akgua!mcnc!decvax!cwruecmp!atvax!ncoast!bsa
From: bsa@ncoast.UUCP (Brandon Allbery (the tame hacker on the North Coast))
Newsgroups: net.unix
Subject: Re:  Problem with patch and infinit directories
Message-ID: <563@ncoast.UUCP>
Date: Thu, 24-Jan-85 10:03:01 EST
Article-I.D.: ncoast.563
Posted: Thu Jan 24 10:03:01 1985
Date-Received: Sun, 27-Jan-85 07:46:25 EST
References: <7464@brl-tgr.ARPA> <2547@umcp-cs.UUCP>
Reply-To: bsa@ncoast.UUCP (Brandon Allbery (the tame hacker on the North Coast))
Organization: The North Coast Xenix System, Cleveland
Lines: 22
Summary: 

> Article <2547@umcp-cs.UUCP>, from chris@umcp-cs.UUCP (Chris Torek)
+----------------
| > The restriction about linking directories is built into
| > the link program.
| 
| Not in 4.2BSD it's not!  I think it was in the 4.1 kernel as well.
| (I haven't seen any other kernel sources, so I wouldn't know about
| V6/V7/Sn.)

V7 allows it; it's how /bin/mkdir works.  In fact, I just had to write
a custom mkdir because /bin/mkdir was using the wrong uid to compute
access permissions.  I can see why 4.2's mkdir system call would be useful.

Also:  Plexus P/35 (System III) has /etc/link which links directories
and is billed to be /bin/ln without error checking (for root only).

--bsa
-- 
   Brandon Allbery @ decvax!cwruecmp!ncoast!bsa (..ncoast!tdi1!bsa business)
6504 Chestnut Road, Independence, Ohio 44131  +1 216 524 1416 (or what have you)
     Who said you had to be (a) a poor programmer or (b) a security hazard
			       to be a hacker?