Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!nuchat!steve
From: steve@nuchat.UUCP (Steve Nuchia)
Newsgroups: comp.unix.wizards,comp.unix.questions
Subject: Re: ulimit's (was "Re: Another Annoying Microport Inquiry")
Message-ID: <381@nuchat.UUCP>
Date: Thu, 8-Oct-87 10:22:53 EDT
Article-I.D.: nuchat.381
Posted: Thu Oct  8 10:22:53 1987
Date-Received: Sun, 11-Oct-87 08:36:31 EDT
References: <1408@dasys1.UUCP> <6475@brl-smoke.ARPA> <926@sauron.Columbia.NCR.COM> <1731@killer.UUCP>
Organization: Public Access - Houston, Tx
Lines: 32
Keywords: Microport patch ulimit
Summary: nice idea, but it won't work
Xref: mnetor comp.unix.wizards:4771 comp.unix.questions:4456

In article <1731@killer.UUCP>, jfh@killer.UUCP (The Beach Bum) writes:
> Here is the code (totally untested) for the `execute the arguments after
> the program name' version.  Real hard stuff ...  An entry of the form

You bet it's untested.  Not a chance of it working on a stock Microbug system.

> 01:2:respawn:/etc/setulimit /etc/getty /dev/tty01 9600
> 
> in /etc/inittab should work just fine ...
[Nice, correct, useless little program deleted]

Microport, in their infinite wisdom, has hooked up the kernel, init, and
getty so that the snoop on each other and nothing will run if you substitute
anything else for their getty.

This is supposed to be to enforce the login-limit, which they do in getty.
However, I've been told that even buying the unlimited liscense won't
let you do this.  Looks like I have some disassembly to do, since I
am quite keen on hooking up an autobauding getty.  Actually, I am writing
a replacement for init that will be run from the main console by root
instead of saying init 2.  This is part of a research project, and is
coming along nicely.  (Aside: The sysV message queue mechanism lacks
sender authentication, which I must consider a fatal flaw.)

In the old days the liscense limit was enforced in the tty driver, which
pissed off people who wanted to talk to serial peripherals.  Then some
vendors put it in login, which is a trivial program.  Now microport
has come up with a scheme that actually works.  *sigh*
-- 
Steve Nuchia	    | [...] but the machine would probably be allowed no mercy.
uunet!nuchat!steve  | In other words then, if a machine is expected to be
(713) 334 6720	    | infallible, it cannot be intelligent.  - Alan Turing, 1947