117 lines
3.5 KiB
Groff
117 lines
3.5 KiB
Groff
.\" $NetBSD: cpu_reboot.9,v 1.9 2001/09/04 02:51:15 wiz Exp $
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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 for the
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.\" NetBSD Project. See http://www.netbsd.org/ for
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.\" information about NetBSD.
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.\" 4. 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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.\" <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
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.\"
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.Dd November 13, 1995
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.Dt CPU_REBOOT 9
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.Os
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.Sh NAME
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.Nm cpu_reboot
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.Nd halt or reboot the system
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.Sh SYNOPSIS
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.Fd #include <sys/reboot.h>
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.Ft void
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.Fn cpu_reboot "int howto" "char *bootstr"
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.Sh DESCRIPTION
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The
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.Fn cpu_reboot
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function handles final system shutdown, and either halts or reboots
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the system. The exact action to be taken is determined by the
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flags passed in
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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 cpu_reboot
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does the following:
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.Bl -enum -offset indent
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.It
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Sets the
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.Va boothowto
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system variable from the
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.Fa howto
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argument.
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.It
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If this is the first invocation of
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.Fn cpu_reboot
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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_shutdown 9
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and sets the time of day clock by calling
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.Xr resettodr 9 .
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.It
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Disables interrupts.
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.It
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If rebooting after a crash (i.e. if
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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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Runs any shutdown hooks by calling
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.Xr doshutdownhooks 9 .
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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 cpu_reboot
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runs any shutdown hooks by calling
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.Xr doshutdownhooks 9 ,
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prints a message, and halts the system.
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.Pp
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If
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.Dv RB_STRING
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is set in
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.Pa howto ,
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then the parameter
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.Fa bootstr
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is passed to the system boot loader on some ports.
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.Sh SEE ALSO
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.Xr doshutdownhooks 9 ,
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.Xr resettodr 9
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.\" .Xr vfs_shutdown 9
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