Path: utzoo!attcan!uunet!cs.utexas.edu!tut.cis.ohio-state.edu!unmvax!gatech!hubcap
From: hubcap@hubcap.clemson.edu (Mike Marshall)
Newsgroups: comp.unix.wizards
Subject: Re: What kinds of things would you want in the GNU OS?
Message-ID: <5620@hubcap.clemson.edu>
Date: 26 May 89 15:24:02 GMT
References: <14020063@hpisod2.HP.COM>
Organization: Clemson University, Clemson, SC
Lines: 20


 * * * There's already an ioctl that'll do this. I like to refer to it as the
 * * * "make me root" ioctl call.
 * * *
 * * No, this ioctl() reassigns the associatd process group of a terminal
 * * device.  It does not change the controlling terminal of any process.
 * *
 *  
 *  If you're thinking of TIOCSPGRP, this ioctl() reassigns the associated
 *  process group of a terminal device.  It does not change the controlling
 *  terminal of any process.  And anyway, most Real Systems(tm) have closed
 *  this ridiculous security hole.
 *  

You have to read between the lines of the tty(4) man page, but there is 
an easy way to "essentially" change the controlling terminal of a 
process (at least, you can still do it with ULTRIX 3.0) and it is 
quite a security hole.

-Mike Marshall