Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!think.com!mintaka!spdcc!dirtydog.ima.isc.com!ism.isc.com!ispd-newsserver!garden.ssd.kodak.com!weimer
From: weimer@garden.ssd.kodak.com (Gary Weimer (253-7796))
Newsgroups: comp.unix.questions
Subject: Re: Changing GID inside csh script
Message-ID: <1991May15.142045.16808@ssd.kodak.com>
Date: 15 May 91 14:20:45 GMT
References: <1991May14.182305.13872@lonex.radc.af.mil>
Sender: news@ssd.kodak.com
Reply-To: weimer@ssd.kodak.com
Organization: Eastman Kodak Co.; Rochester, NY
Lines: 33


In article <1991May14.182305.13872@lonex.radc.af.mil>,
ratazzie@lonex.radc.af.mil (E. Paul Ratazzi) writes:
|> I have checked the FAQ and RTFM'ed on this one.  It seems like it should
|> be easy, but I'm having one heck of a time.
|> 
|> OS:  SunOS 4.1.1
|> 
|> Problem:  When a user executes our CAD software, I want all files he
|> creates while in the CAD software to have a group id of 'cad'.
|> Since these users are normally members of 'staff', the group id has to
|> be changed before the CAD software is executed.  I have found that this
|> can be done manually (and painfully) by typing 'newgrp cad' and then
|> starting the CAD software.
|> 
|>    What I would like is this group change to be automatic.  I have tried
|> everything I can think of from putting 'newgrp cad' in the csh script
|> (doesn't work because newgrp *always* gives another csh) to writing a
|> C code front end which calls setregid and then runs the script using
|> execve (doesn't work because the fact that I'm in sunview gets lost
|> somewhere along the line and the CAD software won't run without sunview).

How about doing:

example% chgrp cad <script>
example% chmod g+s <script>

(assuming <script> is the script that is being run)

This will change the group of the script to 'cad' and then set the group
id  on execution.

weimer@ssd.kodak.com ( Gary Weimer )