From owner-freebsd-questions  Mon Feb 12 03:01:33 1996
Return-Path: owner-questions
Received: (from root@localhost)
          by freefall.freebsd.org (8.7.3/8.7.3) id DAA14451
          for questions-outgoing; Mon, 12 Feb 1996 03:01:33 -0800 (PST)
Received: from who.cdrom.com (who.cdrom.com [192.216.222.3])
          by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id DAA14446
          for <freebsd-questions@FreeBSD.ORG>; Mon, 12 Feb 1996 03:01:31 -0800 (PST)
Received: from methan.chemie.fu-berlin.de (methan.chemie.fu-berlin.de [130.133.2.81])
          by who.cdrom.com (8.6.12/8.6.11) with SMTP id CAA17773
          for <freebsd-questions@FreeBSD.ORG>; Mon, 12 Feb 1996 02:59:56 -0800
Received: by methan.chemie.fu-berlin.de (Smail3.1.29.1)
	  from hal.in-berlin.de with gsmtp
	  id <m0tlvxH-0009zJC>; Mon, 12 Feb 96 11:57 MET
Received: by hal.in-berlin.de (Smail3.1.29.1 #1)
	id m0tlvvI-000BKfC; Mon, 12 Feb 96 11:55 MET
Message-Id: <m0tlvvI-000BKfC@hal.in-berlin.de>
From: dirk@hal.in-berlin.de (Dirk Froemberg)
Subject: Re: How to disable Ctrl-Alt-Del ?!
To: jdli@linux.csie.nctu.edu.tw (Chien-Ta Lee)
Date: Mon, 12 Feb 1996 11:55:56 +0100 (MET)
Cc: freebsd-questions@FreeBSD.ORG
In-Reply-To: <199602120312.LAA25839@linux.csie.nctu.edu.tw> from "Chien-Ta Lee" at Feb 12, 96 11:12:51 am
X-Mailer: ELM [version 2.4 PL24 ME8b]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-questions@FreeBSD.ORG
Precedence: bulk

Chien-Ta Lee writes:

> 	How can I disable reboot from Ctrl-alt-Del ?!

Hello!

Unfortunaly you didn't mention whether you're using syscons or
pcvt. So I'll assume you're using syscons.

The easiest way would be to prevent the kernel to perform a shutdown
after pressing CTRL-ALT-DEL. However, it would be nice to have an
option in /etc/sysconfig which is passed to the kernel via sysctl.

The attached patch is against version 1.117.4.7 of syscons.c. So
the line numbering might be different from yours. After applying
the patch you have to add "options NOSCSHUTDOWN" to your kernel-
config-file in /sys/i386/conf. Finally, recompile your kernel.

	Best regards Dirk

*** /sys/i386/isa/syscons.c.dist	Fri Feb  9 19:51:05 1996
--- /sys/i386/isa/syscons.c	Mon Feb 12 11:39:40 1996
***************
*** 25,31 ****
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
!  *  $Id: syscons.c,v 1.117.4.7 1996/02/08 06:32:45 pst Exp $
   */
  
  #include "sc.h"
--- 25,31 ----
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
!  *  $Id: syscons.c,v 1.117.4.7.1 1996/02/08 06:32:45 pst Exp $
   */
  
  #include "sc.h"
***************
*** 2505,2511 ****
--- 2505,2513 ----
  	    case NOP:
  		break;
  	    case RBT:
+ #ifndef NOSCSHUTDOWN
  		shutdown_nice();
+ #endif
  		break;
  	    case SUSP:
  #if NAPM > 0

-- 
e-mail: dirk@hal.in-berlin.de		PGP-Public-Key available

"Arbeiten ist nicht vergasen - erschiessen - haengen - irgendwie
toeten!"
		-- Klaus Scheurenberg, "Ich will leben"