Re: What's in a group?

[Thomas Schwinge]

On Sun, Mar 19, 2006 at 11:17:48PM +0100, Marcus Brinkmann wrote:
> But what corresponds to the Unix group concept?  I have identified two
> semantic uses for a "group":
> 
> 1) Sharing information and authorization.  Ie, allow communication
>    among users of the same group.
> 
> 2) Provide durable storage that is not associated with any particular
>    member of the group.

3) Hindrance of the above.

#v+
$ groups
users foo
$ ls -l /tmp/not-for-fooers
-rw----rw- 1 thomas foo 0 Mar 19 23:45 /tmp/not-for-fooers
$ cat /tmp/not-for-fooers
cat: /tmp/not-for-fooers: Permission denied
#v-

(Obviously, this works only as long as you're not allowed to drop group
memberships.)

I don't know if there's a real-world example of this facility being used,
though.


Regards,
 Thomas