Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!lll-winken!csd4.milw.wisc.edu!marque!lakesys!chad
From: chad@lakesys.UUCP (Chad Gibbons)
Newsgroups: comp.unix.wizards
Subject: Re: Priorty messages in Unix
Message-ID: <539@lakesys.UUCP>
Date: 14 Apr 89 03:06:31 GMT
References: <1857@wpi.wpi.edu> <538@lakesys.UUCP>
Reply-To: chad@lakesys.UUCP (Chad Gibbons)
Organization: Lake Systems - Milwaukee, Wisconsin
Lines: 13

In article <538@lakesys.UUCP> tom@lakesys.UUCP (Tom Baas) writes:
|>Does anyone know if there is a way to tell 4.xBSD Unix to let certain
|>priorty messages through?
|On AT&T UNIX, you can allow group write permissions to the /dev/tty.
|I assume that this also holds for BSD Unix(correct me if I'm wrong.)

	On most BSD-derivative systems no user other than the owner has
access to your tty, nor can you modify your own.  Talk requests and such
are done through a system of daemon processes which control user access
to each other.  This was done in order to remove the ever frustrating
moment when someone does a "cat</etc/hosts>/dev/ttyxx&" to your terminal.
-- 
D. Chadwick Gibbons, chad@lakesys.lakesys.com, ...!uunet!marque!lakesys!chad