1.\" $OpenBSD: power.4,v 1.6 2013/07/16 16:05:50 schwarze Exp $ 2.\" 3.\" Copyright (c) 2006 Jason L. Wright (jason@thought.net) 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18.\" DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 19.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 24.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25.\" POSSIBILITY OF SUCH DAMAGE. 26.\" 27.Dd $Mdocdate: July 16 2013 $ 28.Dt POWER 4 sparc64 29.Os 30.Sh NAME 31.Nm power 32.Nd power button 33.Sh SYNOPSIS 34.Cd "power* at ebus?" 35.Sh DESCRIPTION 36Some UltraSPARC host bridges provide an interrupt when the power button 37is depressed. 38The 39.Nm 40driver catches that interrupt. 41If the 42.Va hw.allowpowerdown 43.Xr sysctl 8 44is set to 1, 45.Nm power 46will signal 47.Xr init 8 48to do a clean shutdown. 49.Sh SEE ALSO 50.Xr ebus 4 , 51.Xr intro 4 , 52.Xr init 8 , 53.Xr rc.shutdown 8 , 54.Xr sysctl 8 55.Sh HISTORY 56The 57.Nm 58driver was first supported in 59.Ox 4.0 . 60.Sh AUTHORS 61The driver was written by 62.An Jason Wright Aq Mt jason@thought.net . 63