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From: Ian Lepore <freebsd@damnhippie.dyndns.org>
To: geoffrey levand <geoffrey.levand@mail.ru>
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Date: Sun, 22 Jan 2012 10:07:35 -0700
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Cc: freebsd-hackers <freebsd-hackers@freebsd.org>
Subject: Re: Rebooting/Halting system from kernel module
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On Sun, 2012-01-22 at 14:19 +0400, geoffrey levand wrote:
> Hi,
> 
> how would i reboot/halt the system from a kernel module ?
> 
> regards
> 
> --
> Почта@Mail.Ru в твоем мобильном!
> Просто зайди с телефона на m.mail.ru

There is an undocumented (at least in terms of a manpage) function named
shutdown_nice() in sys/kern/kern_shutdown.c that will send a signal to
the init process if it's running or call boot(9) if not.  Or maybe a
direct call to boot(9) is what you're looking for, if bypassing the
running of rc shutdown scripts and all is your goal.  (There is a mapage
for boot(9)).

-- Ian