From owner-freebsd-questions@FreeBSD.ORG  Thu Jul  8 10:57:51 2010
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 6A2481065670
	for <freebsd-questions@freebsd.org>;
	Thu,  8 Jul 2010 10:57:51 +0000 (UTC)
	(envelope-from freebsd@optimis.net)
Received: from mail.optimis.net (mail.optimis.net [69.104.191.124])
	by mx1.freebsd.org (Postfix) with ESMTP id 2998C8FC1A
	for <freebsd-questions@freebsd.org>;
	Thu,  8 Jul 2010 10:57:50 +0000 (UTC)
Received: from marvin.optimis.net (marvin.optimis.net [192.168.1.3])
	by mail.optimis.net (8.14.3/8.14.3) with ESMTP id o68AvnPe088313
	for <freebsd-questions@freebsd.org>;
	Thu, 8 Jul 2010 03:57:50 -0700 (PDT)
	(envelope-from freebsd@optimis.net)
Received: from marvin.optimis.net (localhost [127.0.0.1])
	by marvin.optimis.net (8.14.3/8.14.3) with ESMTP id o68Avo95036859;
	Thu, 8 Jul 2010 03:57:50 -0700 (PDT)
	(envelope-from freebsd@optimis.net)
Received: (from george@localhost)
	by marvin.optimis.net (8.14.3/8.14.3/Submit) id o68AvoRq036858;
	Thu, 8 Jul 2010 03:57:50 -0700 (PDT)
	(envelope-from freebsd@optimis.net)
Date: Thu, 8 Jul 2010 03:57:49 -0700
From: George Davidovich <freebsd@optimis.net>
To: freebsd-questions@freebsd.org
Message-ID: <20100708105749.GA34771@marvin.optimis.net>
References: <rs8b36521ebsv6n8rfq9797gjbn1pdg2lm@4ax.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <rs8b36521ebsv6n8rfq9797gjbn1pdg2lm@4ax.com>
User-Agent: Mutt/1.5.19 (2009-01-05)
Subject: Re: [6.3] Get e-mail when CTRL-ALT-DEL is used?
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
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: Thu, 08 Jul 2010 10:57:51 -0000

On Thu, Jul 08, 2010 at 12:12:27PM +0200, Gilles wrote:
> This is on a remote 6.3 host: I'd like to get an e-mail if a user hits
> the CTRL-ALT-DEL to reboot the server.
> 
> Googling told me that the use of the three-key combo can be
> enabled/disabled when compiling a new kernel, but not how to manage
> this feature when it's enabled in a running kernel.
> 
> Is there a configuration file somewhere that would let me add e-mail
> support for this action?

Assuming you want to know whether the server was rebooted (as opposed to
whether a user invoked a given key combination), adding something
along the lines of the following to root's crontab(5) should suffice:

  @reboot echo "`hostname` rebooted" \
  | mail -s "`hostname` rebooted" gilles@example.org

-- 
George