Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!pollux.usc.edu!kjh
From: kjh@pollux.usc.edu (Kenneth J. Hendrickson)
Newsgroups: comp.os.minix
Subject: group permissions
Message-ID: <26267@usc.edu>
Date: 31 Jul 90 07:04:32 GMT
Sender: news@usc.edu
Organization: EE-Systems, USC, Los Angeles
Lines: 26
Nntp-Posting-Host: pollux.usc.edu

Somebody please educate me about groups and permissions.  I can't seem
to get it working under Minix.  I have the following /etc/group:

... [some stuff deleted]
ham:*:51:
user:*:60:kjh

and the following /etc/passwd:

... [some stuff deleted]
ast:[encrypted_passwd]:10:60:Andy Tanenbaum:/usr/user/ast:
kjh:[encrypted_passwd]:11:51:Kenneth J. Hendrickson:/usr/user/kjh:

So I thought that ast belonged to the group user, and kjh belongs to the
group ham, but kjh also has priviledges in the group user.

I created the file /usr/user/ast/tmp with permissions of -rw-r-----.
The file is owned by ast, and has a group of user (chown and chgrp).
Ast's directory has permissions of -rwxr-xr-x.  Kjh can ls ast's
directory, as expected, but cannot read the file tmp.  Cat says it
cannot open the file, while more says that permission is denied.

I want to use groups for the adventure program, and to permit access to
the printer on a selective basis.  How do I do it?

Ken Hendrickson N8DGN/6       kjh@usc.edu      ...!uunet!usc!pollux!kjh