1997-02-14 07:06:26 +00:00
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.\" $NetBSD: boot.9,v 1.2 1996/09/24 07:01:26 ghudson Exp $
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.\"
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.\" Copyright (c) 1997
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.\" Mike Pritchard. All rights reserved.
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.\"
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.\" Copyright (c) 1994 Christopher G. Demetriou
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Christopher G. Demetriou
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.\" for the NetBSD Project.
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.\" 3. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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1999-08-28 00:22:10 +00:00
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.\" $FreeBSD$
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1999-07-12 21:02:10 +00:00
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.\"
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1997-02-14 07:06:26 +00:00
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.Dd February 14, 1997
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.Dt BOOT 9
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.Os
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.Sh NAME
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.Nm boot
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.Nd halt or reboot the system
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.Sh SYNOPSIS
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2001-10-01 16:09:29 +00:00
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.In sys/types.h
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.In sys/systm.h
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.In sys/reboot.h
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1997-02-14 07:06:26 +00:00
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.Ft void
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.Fn boot "int howto"
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.Sh DESCRIPTION
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The
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.Fn boot
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function handles final system shutdown, and either halts or reboots
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2003-10-23 01:14:18 +00:00
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the system.
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The exact action to be taken is determined by the flags passed in
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1997-02-14 07:06:26 +00:00
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.Fa howto
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and by whether or not the system has finished autoconfiguration.
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.Pp
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If the system has finished autoconfiguration,
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.Fn boot
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does the following:
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.Bl -enum -offset indent
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.It
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If this is the first invocation of
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.Fn boot
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and the
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.Dv RB_NOSYNC
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flag is not set in
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.Fa howto ,
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syncs and unmounts the system disks by calling
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.Xr vfs_unmountall 9 .
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.It
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Disables interrupts.
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.It
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2004-07-03 18:29:24 +00:00
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If rebooting after a crash (i.e., if
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1997-02-14 07:06:26 +00:00
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.Dv RB_DUMP
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is set in
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.Fa howto ,
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but
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.Dv RB_HALT
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is not), saves a system crash dump.
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.It
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2001-09-03 16:42:35 +00:00
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Runs any shutdown hooks previously registered.
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1997-02-14 07:06:26 +00:00
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.It
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Prints a message indicating that the system is about to be halted
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or rebooted.
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.It
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If
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.Dv RB_HALT
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is set in
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.Fa howto ,
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halts the system.
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Otherwise, reboots the system.
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.El
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.Pp
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If the system has not finished autoconfiguration,
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.Fn boot
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2001-09-04 10:12:11 +00:00
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runs any shutdown hooks previously registered,
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1997-02-14 07:06:26 +00:00
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prints a message, and halts the system.
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.Sh SEE ALSO
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.Xr vfs_unmountall 9
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