How about a SetUID-root program that calls setgroups(). It probably should
check the GID of the caller to ensure it is a member of a student group.
You would run it at login.

On Mon, 5 Mar 2001, Rakhesh Sasidharan wrote:
> Suppose I have three groups 'btech96", "btech97", and "btech98" each of 50
> students each in /etc/group.  Now, I want to make a new group called
> "Students" which should include all the members of the above 3 btech
> groups.
>
> If I were to simply add "students:*:1005:btech96,btech97,btech98" to that
> file, I don't think it would work (I tried that, and even the manpage says
> that group members must be users).  What then is the general proceedure to
> do something like this ?
>
> ... simply cut and paste all the members of the three btech groups into
> students, AND make sure I always add any new member to students also, or
> is there anything else (hopefully) ?  (BTW, in case the only way is to cut
> and paste, is there any limit on the maximum nr of users in a particular
> group ?).

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Claude Marinier, Information Technology Group    claude.marinier@dreo.dnd.ca
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