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Path: utzoo!mnetor!seismo!rutgers!princeton!allegra!ulysses!sfmag!sfsup!mpl
From: mpl@sfsup.UUCP
Newsgroups: comp.os.minix
Subject: Re: super_user in fs
Message-ID: <1589@sfsup.UUCP>
Date: Thu, 2-Jul-87 14:38:41 EDT
Article-I.D.: sfsup.1589
Posted: Thu Jul  2 14:38:41 1987
Date-Received: Sat, 4-Jul-87 08:40:43 EDT
References: <462@csm9a.UUCP>
Organization: AT&T-IS, Summit N.J. USA
Lines: 17
Summary: use the set-uid bit!

In article <462@csm9a.UUCP>, japplega@csm9a.UUCP writes:
> Contrary to my previous posting commenting out the super_user check in
> open.c (fs) did not solve my problem... only root can link or unlink
> directories.... I finally have resolved myself to logging in as root
> 
> I also discovered that when the system is recompiled only root can
> sucessfully issue a su?
> 

The solution is as follows:
"mkdir" should be set-user-id and owned by root.
do a "chown root mkdir" and a "chmod 4711 mkdir"

"mv" calls a program called "mv_dir" to actually move directories.
"mv_dir" should also be mode 4711, owned by root.

Finally, "su" should have the same mode and owner.