1997-02-14 07:06:26 +00:00
|
|
|
.\" $NetBSD: boot.9,v 1.2 1996/09/24 07:01:26 ghudson Exp $
|
|
|
|
|
.\"
|
|
|
|
|
.\" Copyright (c) 1997
|
|
|
|
|
.\" Mike Pritchard. All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Copyright (c) 1994 Christopher G. Demetriou
|
|
|
|
|
.\" All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
|
.\" are met:
|
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
|
|
|
.\" must display the following acknowledgement:
|
|
|
|
|
.\" This product includes software developed by Christopher G. Demetriou
|
|
|
|
|
.\" for the NetBSD Project.
|
|
|
|
|
.\" 3. The name of the author may not be used to endorse or promote products
|
|
|
|
|
.\" derived from this software without specific prior written permission
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
|
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
|
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
|
|
|
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
|
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
|
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
|
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
|
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
|
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
|
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
|
.\"
|
|
|
|
|
.Dd February 14, 1997
|
|
|
|
|
.Dt BOOT 9
|
|
|
|
|
.Os
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm boot
|
|
|
|
|
.Nd halt or reboot the system
|
|
|
|
|
.Sh SYNOPSIS
|
1997-04-11 17:58:16 +00:00
|
|
|
.Fd #include <sys/types.h>
|
|
|
|
|
.Fd #include <sys/systm.h>
|
1997-02-14 07:06:26 +00:00
|
|
|
.Fd #include <sys/reboot.h>
|
|
|
|
|
.Ft void
|
|
|
|
|
.Fn boot "int howto"
|
|
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
The
|
|
|
|
|
.Fn boot
|
|
|
|
|
function handles final system shutdown, and either halts or reboots
|
|
|
|
|
the system. The exact action to be taken is determined by the
|
|
|
|
|
flags passed in
|
|
|
|
|
.Fa howto
|
|
|
|
|
and by whether or not the system has finished autoconfiguration.
|
|
|
|
|
.Pp
|
|
|
|
|
If the system has finished autoconfiguration,
|
|
|
|
|
.Fn boot
|
|
|
|
|
does the following:
|
|
|
|
|
.Bl -enum -offset indent
|
|
|
|
|
.It
|
|
|
|
|
If this is the first invocation of
|
|
|
|
|
.Fn boot
|
|
|
|
|
and the
|
|
|
|
|
.Dv RB_NOSYNC
|
|
|
|
|
flag is not set in
|
|
|
|
|
.Fa howto ,
|
|
|
|
|
syncs and unmounts the system disks by calling
|
|
|
|
|
.Xr vfs_unmountall 9 .
|
|
|
|
|
.It
|
|
|
|
|
Disables interrupts.
|
|
|
|
|
.It
|
|
|
|
|
If rebooting after a crash (i.e. if
|
|
|
|
|
.Dv RB_DUMP
|
|
|
|
|
is set in
|
|
|
|
|
.Fa howto ,
|
|
|
|
|
but
|
|
|
|
|
.Dv RB_HALT
|
|
|
|
|
is not), saves a system crash dump.
|
|
|
|
|
.It
|
|
|
|
|
Runs any shutdown hooks previously set by
|
|
|
|
|
.Xr at_shutdown 9 .
|
|
|
|
|
.It
|
|
|
|
|
Prints a message indicating that the system is about to be halted
|
|
|
|
|
or rebooted.
|
|
|
|
|
.It
|
|
|
|
|
If
|
|
|
|
|
.Dv RB_HALT
|
|
|
|
|
is set in
|
|
|
|
|
.Fa howto ,
|
|
|
|
|
halts the system.
|
|
|
|
|
Otherwise, reboots the system.
|
|
|
|
|
.El
|
|
|
|
|
.Pp
|
|
|
|
|
If the system has not finished autoconfiguration,
|
|
|
|
|
.Fn boot
|
|
|
|
|
runs any shutdown hooks previously set by
|
|
|
|
|
.Xr at_shutdown 9 ,
|
|
|
|
|
prints a message, and halts the system.
|
|
|
|
|
.Pp
|
|
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr at_shutdown 9 ,
|
|
|
|
|
.Xr vfs_unmountall 9
|
