Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!genrad!decvax!cwruecmp!medman!rab From: rab@medman.UUCP Newsgroups: net.unix-wizards Subject: Re: Tioccdtr (bug|feature) Message-ID: <1018@medman.UUCP> Date: Fri, 24-Jun-83 09:59:14 EDT Article-I.D.: medman.1018 Posted: Fri Jun 24 09:59:14 1983 Date-Received: Wed, 29-Jun-83 14:15:29 EDT Lines: 10 Use of the execute bit on a tty device to indicate write permission was implemented back in the dark ages at Harvard. In fact, the people there (specifically at the Science Center) are forced by the ingenuity of their students to be so security conscious that they have had to implement "escape filters" in just about every program that writes characters to a terminal. (Imagine a user putting something nasty in his .plan...) The people at the Harvard Science Center have had lots of experience with protection of their UN*X systems from "hostile" student users. I'd suggest that you contact them for details (at least, as much as they're willing to say).