From owner-cvs-all  Fri Mar 23 16: 1: 0 2001
Delivered-To: cvs-all@freebsd.org
Received: from smtp02.teb1.iconnet.net (smtp02.teb1.iconnet.net [209.3.218.43])
	by hub.freebsd.org (Postfix) with ESMTP
	id 97A9337B71A; Fri, 23 Mar 2001 16:00:54 -0800 (PST)
	(envelope-from babkin@bellatlantic.net)
Received: from bellatlantic.net (client-151-198-117-198.nnj.dialup.bellatlantic.net [151.198.117.198])
	by smtp02.teb1.iconnet.net (8.9.1/8.9.1) with ESMTP id SAA26013;
	Fri, 23 Mar 2001 18:59:11 -0500 (EST)
Message-ID: <3ABBE34E.3F76B476@bellatlantic.net>
Date: Fri, 23 Mar 2001 18:59:10 -0500
From: Sergey Babkin <babkin@bellatlantic.net>
X-Mailer: Mozilla 4.7 [en] (X11; U; FreeBSD 4.0-19990626-CURRENT i386)
X-Accept-Language: en, ru
MIME-Version: 1.0
To: Brian Somers <brian@Awfulhak.org>
Cc: Wilko Bulte <wkb@freebie.demon.nl>,
	Ian Dowse <iedowse@maths.tcd.ie>,
	"Justin T. Gibbs" <gibbs@scsiguy.com>,
	Robert Watson <rwatson@FreeBSD.org>, cvs-committers@FreeBSD.org,
	cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sbin/reboot reboot.c
References: <200103230315.f2N3FgR04938@hak.lan.Awfulhak.org>
Content-Type: text/plain; charset=koi8-r
Content-Transfer-Encoding: 7bit
Sender: owner-cvs-all@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

Brian Somers wrote:
> 
> > Wilko Bulte wrote:
> > >
> > > On Fri, Mar 23, 2001 at 08:07:36AM +1100, Peter Jeremy wrote:
> >
> > > > Instead of moving the common functionality into a common library,
> > > > why not move it into a common process.  Why can't reboot(8) just
> > > > ask init(8) to massacre all the processes and reboot?  (Or, vice
> > > > versa, init could spawn reboot(8) to do the same thing).
> > >
> > > Isn't that what a SysV init does?
> >
> > No, it calls uadmin for actual reboot/shutdown.
> 
> Under sysv the uadmin() args are determined by the signal that's sent
> to init.

Actually there is an uadmin binary that does the uadmin() call.
In inittab it's listed as the last process to start in states
0, 5, 6 - with appropriate arguments.
 
> It's possible for any process (with the correct credentials)
> to call uadmin - I believe reboot and halt both call uadmin()

Yes.

> directly.  AFAIK the only thing on sysv that mucks around with
> killing processes and init scripts is init itself.

Yes, I believe so too.

-SB

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