From owner-freebsd-hackers  Sat Aug 22 11:03:34 1998
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id LAA24160
          for freebsd-hackers-outgoing; Sat, 22 Aug 1998 11:03:34 -0700 (PDT)
          (envelope-from owner-freebsd-hackers@FreeBSD.ORG)
Received: from whistle.com (s205m131.whistle.com [207.76.205.131])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id LAA24155
          for <hackers@FreeBSD.ORG>; Sat, 22 Aug 1998 11:03:33 -0700 (PDT)
          (envelope-from archie@whistle.com)
Received: (from smap@localhost) by whistle.com (8.7.5/8.6.12) id LAA20151; Sat, 22 Aug 1998 11:02:50 -0700 (PDT)
Received: from bubba.whistle.com(207.76.205.7) by whistle.com via smap (V1.3)
	id sma020149; Sat Aug 22 11:02:27 1998
Received: (from archie@localhost) by bubba.whistle.com (8.8.7/8.6.12) id LAA18964; Sat, 22 Aug 1998 11:02:27 -0700 (PDT)
From: Archie Cobbs <archie@whistle.com>
Message-Id: <199808221802.LAA18964@bubba.whistle.com>
Subject: Re: I want to break binary compatibility.
In-Reply-To: <199808220009.CAA05667@ocean.campus.luth.se> from Mikael Karpberg at "Aug 22, 98 02:09:03 am"
To: karpen@ocean.campus.luth.se (Mikael Karpberg)
Date: Sat, 22 Aug 1998 11:02:27 -0700 (PDT)
Cc: rabtter@aye.net, hackers@FreeBSD.ORG
X-Mailer: ELM [version 2.4ME+ PL38 (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

Mikael Karpberg writes:
> > What I want to do, if possible is build a uniq system such that binaries
> > from other systems will not run on it and vice versa. Is this possible?
> 
> One simple way could be to just change the "magic number" on the binaries,
> maybe, and disable all linux compat, etc?

And if you do this, set all executables to have mode --x--x--x so they
can't determine what the new magic number is.

-Archie

___________________________________________________________________________
Archie Cobbs   *   Whistle Communications, Inc.  *   http://www.whistle.com

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message