From owner-freebsd-questions@FreeBSD.ORG  Sat Jul 26 16:20:19 2003
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id BF42B37B401
	for <freebsd-questions@freebsd.org>;
	Sat, 26 Jul 2003 16:20:19 -0700 (PDT)
Received: from clunix.cl.msu.edu (clunix.cl.msu.edu [35.9.2.10])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 0375B43F75
	for <freebsd-questions@freebsd.org>;
	Sat, 26 Jul 2003 16:20:19 -0700 (PDT)
	(envelope-from jerrymc@clunix.cl.msu.edu)
Received: from clunix.cl.msu.edu (localhost [127.0.0.1])
	by clunix.cl.msu.edu (8.12.9/8.12.9) with ESMTP id h6QNJZOg010946;
	Sat, 26 Jul 2003 19:19:35 -0400 (EDT)
Received: (from jerrymc@localhost)
	by clunix.cl.msu.edu (8.12.9/8.12.9/Submit) id h6QNJZSG010945;
	Sat, 26 Jul 2003 19:19:35 -0400 (EDT)
From: Jerry McAllister <jerrymc@clunix.cl.msu.edu>
Message-Id: <200307262319.h6QNJZSG010945@clunix.cl.msu.edu>
To: admin@asarian-host.net (Mark)
Date: Sat, 26 Jul 2003 19:19:35 -0400 (EDT)
In-Reply-To: <200307262149.H6QLN203081893@asarian-host.net> from "Mark" at Jul
	26, 2003 09:49:02 PM
X-Mailer: ELM [version 2.5 PL2]
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
cc: freebsd-questions@freebsd.org
Subject: Re: Unable to open /dev/io
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 26 Jul 2003 23:20:20 -0000

> 
> Earlier, I had asked a question on how to write a byte to the parallel port.
> And Daan Vreeken was kind enough to point me to a litle c-source that uses
> /dev/io.
> 
> Unfortunately, as I just found out, when I raise kern.securelevel to 2
> (FreeBSD 4.7R), I can no longer open /dev/io for writing. :( That means I
> can no longer use this method; because there is no way I will allow my
> production server to run at kern.securelevel lower than 2. Which means I am
> back to square one. :(
> 
> Sigh. Is there then no way to write a simple 0 or 1 to the parallel port,
> without compromizing the security of the server at large?

Do you really need to set the secure level to 2?   What for?

////jerry

> 
> Thanks,
> 
> - Mark
>