1.\" $NetBSD: boot.9,v 1.2 1996/09/24 07:01:26 ghudson Exp $ 2.\" 3.\" Copyright (c) 1997 4.\" Mike Pritchard. All rights reserved. 5.\" 6.\" Copyright (c) 1994 Christopher G. Demetriou 7.\" All rights reserved. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. All advertising materials mentioning features or use of this software 18.\" must display the following acknowledgement: 19.\" This product includes software developed by Christopher G. Demetriou 20.\" for the NetBSD Project. 21.\" 3. The name of the author may not be used to endorse or promote products 22.\" derived from this software without specific prior written permission 23.\" 24.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34.\" 35.\" $FreeBSD: src/share/man/man9/boot.9,v 1.4.2.2 2001/12/17 11:30:18 ru Exp $ 36.\" 37.Dd February 14, 1997 38.Dt BOOT 9 39.Os 40.Sh NAME 41.Nm boot 42.Nd halt or reboot the system 43.Sh SYNOPSIS 44.In sys/types.h 45.In sys/systm.h 46.In sys/reboot.h 47.Ft void 48.Fn boot "int howto" 49.Sh DESCRIPTION 50The 51.Fn boot 52function handles final system shutdown, and either halts or reboots 53the system. The exact action to be taken is determined by the 54flags passed in 55.Fa howto 56and by whether or not the system has finished autoconfiguration. 57.Pp 58If the system has finished autoconfiguration, 59.Fn boot 60does the following: 61.Bl -enum -offset indent 62.It 63If this is the first invocation of 64.Fn boot 65and the 66.Dv RB_NOSYNC 67flag is not set in 68.Fa howto , 69syncs and unmounts the system disks by calling 70.Xr vfs_unmountall 9 . 71.It 72Disables interrupts. 73.It 74If rebooting after a crash (i.e. if 75.Dv RB_DUMP 76is set in 77.Fa howto , 78but 79.Dv RB_HALT 80is not), saves a system crash dump. 81.It 82Runs any shutdown hooks previously set by 83.Xr at_shutdown 9 . 84.It 85Prints a message indicating that the system is about to be halted 86or rebooted. 87.It 88If 89.Dv RB_HALT 90is set in 91.Fa howto , 92halts the system. 93Otherwise, reboots the system. 94.El 95.Pp 96If the system has not finished autoconfiguration, 97.Fn boot 98runs any shutdown hooks previously set by 99.Xr at_shutdown 9 , 100prints a message, and halts the system. 101.Sh SEE ALSO 102.Xr at_shutdown 9 , 103.Xr vfs_unmountall 9 104