From nobody Thu Jul 10 14:30:17 2025
X-Original-To: current@mlmmj.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
	by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4bdHLx4BD4z6171N
	for <current@mlmmj.nyi.freebsd.org>; Thu, 10 Jul 2025 14:30:33 +0000 (UTC)
	(envelope-from kostikbel@gmail.com)
Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1])
	(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
	 key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256)
	(Client did not present a certificate)
	by mx1.freebsd.org (Postfix) with ESMTPS id 4bdHLw6RzDz4DYb;
	Thu, 10 Jul 2025 14:30:32 +0000 (UTC)
	(envelope-from kostikbel@gmail.com)
Authentication-Results: mx1.freebsd.org;
	none
Received: from tom.home (kib@localhost [127.0.0.1] (may be forged))
	by kib.kiev.ua (8.18.1/8.18.1) with ESMTP id 56AEUIT5031128;
	Thu, 10 Jul 2025 17:30:21 +0300 (EEST)
	(envelope-from kostikbel@gmail.com)
DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua 56AEUIT5031128
Received: (from kostik@localhost)
	by tom.home (8.18.1/8.18.1/Submit) id 56AEUH14031127;
	Thu, 10 Jul 2025 17:30:17 +0300 (EEST)
	(envelope-from kostikbel@gmail.com)
X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f
Date: Thu, 10 Jul 2025 17:30:17 +0300
From: Konstantin Belousov <kostikbel@gmail.com>
To: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
Cc: Zhenlei Huang <zlei@freebsd.org>, FreeBSD Current <current@freebsd.org>
Subject: Re: sysctl to prevent reboot?
Message-ID: <aG_OeXOdKQ9uAt7m@kib.kiev.ua>
References: <o2o49n7o-793n-q70n-s017-5q9508r363q7@yvfgf.mnoonqbm.arg>
 <1B1CD603-065D-436F-97D9-DDF65AB7F115@FreeBSD.org>
 <o0829s6o-7365-qn4n-8s39-0ro2r6173596@yvfgf.mnoonqbm.arg>
List-Id: Discussions about the use of FreeBSD-current <freebsd-current.freebsd.org>
List-Archive: https://lists.freebsd.org/archives/freebsd-current
List-Help: <mailto:freebsd-current+help@freebsd.org>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Subscribe: <mailto:freebsd-current+subscribe@freebsd.org>
List-Unsubscribe: <mailto:freebsd-current+unsubscribe@freebsd.org>
Sender: owner-freebsd-current@FreeBSD.org
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <o0829s6o-7365-qn4n-8s39-0ro2r6173596@yvfgf.mnoonqbm.arg>
X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,BAYES_00,
	DKIM_ADSP_CUSTOM_MED,FORGED_GMAIL_RCVD,FREEMAIL_FROM,
	NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=4.0.1
X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on tom.home
X-Rspamd-Queue-Id: 4bdHLw6RzDz4DYb
X-Spamd-Bar: ----
X-Rspamd-Pre-Result: action=no action;
	module=replies;
	Message is reply to one we originated
X-Spamd-Result: default: False [-4.00 / 15.00];
	REPLY(-4.00)[];
	ASN(0.00)[asn:6939, ipnet:2001:470::/32, country:US]

On Thu, Jul 10, 2025 at 01:51:47PM +0000, Bjoern A. Zeeb wrote:
> On Thu, 10 Jul 2025, Zhenlei Huang wrote:
> 
> Hi,
> 
> > I believe Konstantin's work [1] and  [2] are precisely what you need.
> > 
> > [1] https://cgit.freebsd.org/src/commit/?id=7fb88c20eccc3fd2118fda2ba58d7afe2b87f7e3 <https://cgit.freebsd.org/src/commit/?id=7fb88c20eccc3fd2118fda2ba58d7afe2b87f7e3>   shutdown(8): refuse to run if /var/run/noshutdown is present
> > [2] https://cgit.freebsd.org/src/commit/?id=384d976725a5c29734a9227fcdb6ef0807485c91 <https://cgit.freebsd.org/src/commit/?id=384d976725a5c29734a9227fcdb6ef0807485c91>  rc.d: Add precious_machine rc.conf knob to create /var/run/noshutdown
> 
> Thanks!  I was looking in the wrong place.
> 
> That doesn't catch reboot, does it?  For me that's the offending command
> as I type that at the loader prompt (if I am in the correct window).

Reboot is very different from shutdown.  I never use it except on nfs-booted
crash boxes, so I did not considered.

If you think it is useful, I can add the check there too.