Path: utzoo!attcan!uunet!clyde.concordia.ca!mcgill-vision!quiche!quiche.cs.mcgill.ca
From: mikey@quiche.cs.mcgill.ca (Michael GALLOP)
Newsgroups: comp.unix.questions
Subject: Re: UID ownership of cooperating tty
Keywords: file ownership, SUID root
Message-ID: <5124@quiche.cs.mcgill.ca>
Date: 2 Oct 90 16:07:08 GMT
References: <154@rhlab.UUCP>
Sender: mikey@quiche.cs.mcgill.ca
Organization: SOCS - Mcgill University, Montreal, Canada
Lines: 25


In article <154@rhlab.UUCP>, kuhn@rhlab.UUCP (Mike Kuhn) writes:
> 
> I need to know the best/safest/only way to assign ownership of a
> cooperating tty to UID of the users login terminal. I basically feel that
> the solution I have (using the SUID and root) seems inappropriate for a
> SIMPLE application.
> 
I would be interested to know what kind of system you are on.

From my experience both the SUN4 (running SunOS 4.0.3 and 4.1) and the DG AViiON
running DG/UX automatically change the owner of the /dev/tty entry to the UID 
on login. Otherwise mesg would have to be setuid, in order to make the terminal
non-writeable. Then each editor would have to call it in order to lock the 
terminal to prevent writes (As VI does....) to screen.





--
| mikey@quiche.cs.mcgill.ca |  Mike Gallop     				   |
|"Stealing from one author is plagarism....Stealing from many is research" |
I shall walk through the valley of Death and I shall fear no evil.......
..Except, perhaps, a sadistics assignment