Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!linus!philabs!cmcl2!seismo!brl-smoke!gwyn
From: gwyn@brl-smoke.ARPA (Doug Gwyn )
Newsgroups: net.unix-wizards
Subject: Re: SYS V unlink() call
Message-ID: <1019@brl-smoke.ARPA>
Date: Mon, 17-Feb-86 19:42:48 EST
Article-I.D.: brl-smok.1019
Posted: Mon Feb 17 19:42:48 1986
Date-Received: Wed, 19-Feb-86 20:29:27 EST
References: <683@dayton.UUCP>
Reply-To: gwyn@brl.ARPA
Organization: /usr/local/lib/news/organization
Lines: 15

> My question is this: In SYSV do you have* to be SU
> to unlink directories?

Yes, insofar as the unlink() system call is concerned.
(Ditto for making links to directories.)  This should
be true for any UNIX that does not supply special
directory system calls.

> Does that mean that to delete *any* directory the program
> must be set uid'ed to root?

No, you can always use something like:
	system( "rm directory-name" );
"rm", or a set-UID subprocess "rmdir" that it might
invoke, has the necessary privilege.