216 lines
6.3 KiB
Groff
216 lines
6.3 KiB
Groff
.\" $NetBSD: apmd.8,v 1.13 2000/02/02 01:55:55 enami Exp $
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.\"
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.\" Copyright (c) 1996 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by John Kohl.
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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 the NetBSD
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.\" Foundation, Inc. and its contributors.
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.\" 4. Neither the name of The NetBSD Foundation nor the names of its
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.\" contributors may be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd September 12, 1996
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.Dt APMD 8
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.Os
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.Sh NAME
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.Nm apmd
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.Nd Advanced Power Management monitor daemon
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.Sh SYNOPSIS
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.Nm ""
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.Op Fl adlqs
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.Bk -words
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.Op Fl t Ar seconds
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.Ek
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.Bk -words
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.Op Fl S Ar sockname
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.Ek
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.Bk -words
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.Op Fl m Ar sockmode
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.Ek
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.Bk -words
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.Op Fl o Ar sockowner:sockgroup
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.Ek
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.Bk -words
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.Op Fl f Ar devname
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.Ek
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.Sh DESCRIPTION
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.Nm
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monitors the advanced power management (APM) pseudo-device, acting on
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signaled events and upon user requests as sent by the
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.Xr apm 8
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utility.
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For suspend and standby request events delivered by the BIOS, or via
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.Xr apm 8 ,
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.Nm
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runs the appropriate configuration program (if one exists),
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syncs the buffer cache to disk and initiates the requested mode.
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When resuming after suspend or standby,
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.Nm
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runs the appropriate configuration utility (if one exists).
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For power status change events,
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.Nm
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fetches the current status and reports it via
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.Xr syslog 3
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with logging facility
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.Dv LOG_DAEMON .
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.Pp
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.Nm
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announces the transition to standby mode with a single high tone on the
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speaker (using the
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.Pa /dev/speaker
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device).
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Suspends are announced with two high tones.
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.Pp
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.Nm
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periodically polls the APM driver for the current power state.
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If the battery charge level changes substantially or the external power
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status changes, the new status is logged. The polling rate defaults to
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once per 10 minutes, but may be specified using the
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.Fl t
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command-line flag.
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.Pp
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If the
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.Fl s
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flag is specified, the current battery statistics are reported via
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.Xr syslog 3
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and
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.Nm
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exits without monitoring the APM status.
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.Pp
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If the
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.Fl a
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flag is specified, any BIOS-initiated suspend or standby requests are
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ignored if the system is connected to line current and not running from
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batteries (user requests are still honored).
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.Pp
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If the
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.Fl l
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flag is specified, then a low-battery event causes a suspend request
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to occur.
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.Pp
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If the
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.Fl d
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flag is specified,
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.Nm
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enters debug mode, logging to facility
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.Dv LOG_LOCAL1
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and staying in the foreground on the controlling terminal.
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.Pp
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If the
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.Fl q
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flag is specified,
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.Nm
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does not announce suspend and standby requests on the speaker.
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.Pp
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When a client requests a suspend or stand-by mode,
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.Nm
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does not wait for positive confirmation that the requested
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mode has been entered before replying to the client; to do so would mean
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the client does not get a reply until the system resumes from its sleep state.
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Rather,
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.Nm
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replies with the intended state to the client and then places the system
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in the requested mode after running the configuration script and
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flushing the buffer cache.
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.Pp
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Actions can be configured for the five transitions:
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.Cm suspend ,
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.Cm standby ,
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.Cm resume ,
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.Cm line
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or
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.Cm battery .
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The suspend and standby actions are run prior to
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.Nm
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performing any other actions (such as disk syncs) and entering the new
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mode. The resume program is run after resuming from a stand-by or
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suspended state.
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.Pp
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The line and battery actions are run after switching power sources to
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AC (line) or battery, respectively. The appropriate line or battery action
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is also run upon the startup of apmd based on the current power source.
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.Sh FILES
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.Pa /etc/apm/suspend ,
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.Pa /etc/apm/standby ,
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.Pa /etc/apm/resume ,
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.Pa /etc/apm/line
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and
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.Pa /etc/apm/battery
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are the files that contain the host's customized actions.
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Each file must be an executable binary or shell script suitable
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for execution by the
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.Xr execve 2
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function.
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If you wish to have the same program or script control all transitions, it
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may determine which transition is in progress by examining its
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.Va argv[0]
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which is set to one of
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.Ar suspend ,
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.Ar standby ,
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.Ar resume ,
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.Ar line
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or
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.Ar battery .
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See
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.Pa /usr/share/examples/apm/script
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for such an example script.
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.Pp
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.Pa /var/run/apmdev
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is the default UNIX-domain socket used for communication with
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.Xr apm 8 .
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The
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.Fl S
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flag may be used to specify an alternate socket name.
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The socket is protected by default to mode 0660, UID 0, GID 0;
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the
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.Fl m
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and
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.Fl o
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flags may be used to specify different modes or owners/groups, respectively.
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.Pp
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.Pa /dev/apmctl
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is the default device used to control the APM kernel driver.
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The
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.Fl f
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flag may be used to specify an alternate device file name.
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.Sh SEE ALSO
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.Xr execve 2 ,
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.Xr syslog 3 ,
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.Xr apm 4 ,
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.Xr speaker 4 ,
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.Xr apm 8 ,
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.Xr syslogd 8
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.Sh REFERENCES
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Advanced Power Management (APM) BIOS Interface Specification (revision
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1.1), Intel Corporation and Microsoft Corporation.
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Nx 1.3 .
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