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-<?xml version='1.0'?> <!--*-nxml-*-->
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
- "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-
-<!--
- This file is part of systemd.
-
- Copyright 2012 Lennart Poettering
- Copyright 2013 Zbigniew Jędrzejewski-Szmek
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
--->
-
-<refentry id="systemd-suspend.service"
- xmlns:xi="http://www.w3.org/2001/XInclude">
-
- <refentryinfo>
- <title>systemd-suspend.service</title>
- <productname>systemd</productname>
-
- <authorgroup>
- <author>
- <contrib>Developer</contrib>
- <firstname>Lennart</firstname>
- <surname>Poettering</surname>
- <email>lennart@poettering.net</email>
- </author>
- </authorgroup>
- </refentryinfo>
-
- <refmeta>
- <refentrytitle>systemd-suspend.service</refentrytitle>
- <manvolnum>8</manvolnum>
- </refmeta>
-
- <refnamediv>
- <refname>systemd-suspend.service</refname>
- <refname>systemd-hibernate.service</refname>
- <refname>systemd-hybrid-sleep.service</refname>
- <refname>systemd-sleep</refname>
- <refpurpose>System sleep state logic</refpurpose>
- </refnamediv>
-
- <refsynopsisdiv>
- <para><filename>systemd-suspend.service</filename></para>
- <para><filename>systemd-hibernate.service</filename></para>
- <para><filename>systemd-hybrid-sleep.service</filename></para>
- <para><filename>/usr/lib/systemd/system-sleep</filename></para>
- </refsynopsisdiv>
-
- <refsect1>
- <title>Description</title>
-
- <para><filename>systemd-suspend.service</filename> is a system
- service that is pulled in by <filename>suspend.target</filename>
- and is responsible for the actual system suspend. Similarly,
- <filename>systemd-hibernate.service</filename> is pulled in by
- <filename>hibernate.target</filename> to execute the actual
- hibernation. Finally,
- <filename>systemd-hybrid-sleep.service</filename> is pulled in by
- <filename>hybrid-sleep.target</filename> to execute hybrid
- hibernation with system suspend.</para>
-
- <para>Immediately before entering system suspend and/or
- hibernation <filename>systemd-suspend.service</filename> (and the
- other mentioned units, respectively) will run all executables in
- <filename>/usr/lib/systemd/system-sleep/</filename> and pass two
- arguments to them. The first argument will be
- <literal>pre</literal>, the second either
- <literal>suspend</literal>, <literal>hibernate</literal>, or
- <literal>hybrid-sleep</literal> depending on the chosen action.
- Immediately after leaving system suspend and/or hibernation the
- same executables are run, but the first argument is now
- <literal>post</literal>. All executables in this directory are
- executed in parallel, and execution of the action is not continued
- until all executables have finished.</para>
-
- <para>Note that scripts or binaries dropped in
- <filename>/usr/lib/systemd/system-sleep/</filename> are intended
- for local use only and should be considered hacks. If applications
- want to be notified of system suspend/hibernation and resume,
- there are much nicer interfaces available.</para>
-
- <para>Note that
- <filename>systemd-suspend.service</filename>,
- <filename>systemd-hibernate.service</filename>, and
- <filename>systemd-hybrid-sleep.service</filename>
- should never be executed directly. Instead, trigger system sleep
- states with a command such as <literal>systemctl suspend</literal>
- or similar.</para>
-
- <para>Internally, this service will echo a string like
- <literal>mem</literal> into <filename>/sys/power/state</filename>,
- to trigger the actual system suspend. What exactly is written
- where can be configured in the <literal>[Sleep]</literal> section
- of <filename>/etc/systemd/sleep.conf</filename> or a
- <filename>sleep.conf.d</filename> file. See
- <citerefentry><refentrytitle>systemd-sleep.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
- </para>
- </refsect1>
-
- <refsect1>
- <title>Options</title>
-
- <para><command>systemd-sleep</command> understands the
- following commands:</para>
-
- <variablelist>
- <xi:include href="standard-options.xml" xpointer="help" />
- <xi:include href="standard-options.xml" xpointer="version" />
-
- <varlistentry>
- <term><option>suspend</option></term>
- <term><option>hibernate</option></term>
- <term><option>hybrid-sleep</option></term>
-
- <listitem><para>Suspend, hibernate, or put the system to
- hybrid sleep.</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
-
- <refsect1>
- <title>See Also</title>
- <para>
- <citerefentry><refentrytitle>systemd-sleep.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>systemd-halt.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
- </para>
- </refsect1>
-
-</refentry>