19adb8a320
A new config file /etc/systemd/sleep.conf is added. It is parsed by systemd-sleep and logind. The strings written to /sys/power/disk and /sys/power/state can be configured. This allows people to use different modes of suspend on systems with broken or special hardware. Configuration is shared between systemd-sleep and logind to enable logind to answer the question "can the system be put to sleep" as correctly as possible without actually invoking the action. If the user configured systemd-sleep to only use 'freeze', but current kernel does not support it, logind will properly report that the system cannot be put to sleep. https://bugs.freedesktop.org/show_bug.cgi?id=57793 https://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=7e73c5ae6e7991a6c01f6d096ff8afaef4458c36 http://lists.freedesktop.org/archives/systemd-devel/2013-February/009238.html SYSTEM_CONFIG_FILE and USER_CONFIG_FILE defines were removed since they were used in only a few places and with the addition of /etc/systemd/sleep.conf it becomes easier to just append the name of each file to the dir name.
165 lines
7.5 KiB
XML
165 lines
7.5 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2012 Lennart Poettering
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Copyright 2013 Zbigniew Jędrzejewski-Szmek
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="systemd-suspend.service">
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<refentryinfo>
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<title>systemd-suspend.service</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd-suspend.service</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-suspend.service</refname>
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<refname>systemd-hibernate.service</refname>
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<refname>systemd-hybrid-sleep.service</refname>
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<refname>systemd-sleep</refname>
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<refpurpose>System sleep state logic</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>systemd-suspend.service</filename></para>
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<para><filename>systemd-hibernate.service</filename></para>
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<para><filename>systemd-hybrid-sleep.service</filename></para>
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<para><filename>/usr/lib/systemd/systemd-sleep</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><filename>systemd-suspend.service</filename> is
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a system service that is pulled in by
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<filename>suspend.target</filename> and is responsible
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for the actual system suspend. Similarly,
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<filename>systemd-hibernate.service</filename> is
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pulled in by <filename>hibernate.target</filename> to
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execute the actual hibernation. Finally,
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<filename>systemd-hybrid-sleep.service</filename> is
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pulled in by <filename>hybrid-sleep.target</filename>
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to execute hybrid hibernation with system
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suspend.</para>
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<para>Immediately before entering system suspend
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and/or hibernation
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<filename>systemd-suspend.service</filename> (and the
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other mentioned units, respectively) will run all
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executables in
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<filename>/usr/lib/systemd/system-sleep/</filename>
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and pass two arguments to them. The first argument
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will be "<literal>pre</literal>", the second either
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"<literal>suspend</literal>",
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"<literal>hibernate</literal>", or
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"<literal>hybrid-sleep</literal>" depending on the
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chosen action. Immediately after leaving system
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suspend and/or hibernation the same executables are run,
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but the first argument is now
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"<literal>post</literal>". All executables in this
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directory are executed in parallel, and execution of
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the action is not continued until all executables
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have finished.</para>
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<para>Note that scripts or binaries dropped in
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<filename>/usr/lib/systemd/system-sleep/</filename>
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are intended for local use only and should be
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considered hacks. If applications want to be notified
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of system suspend/hibernation and resume there are
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much nicer interfaces available.</para>
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<para>Note that
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<filename>systemd-suspend.service</filename>,
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<filename>systemd-hibernate.service</filename>, and
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<filename>systemd-hybrid-sleep.service</filename>
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should never be executed directly. Instead, trigger
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system sleep states with a command such as
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"<literal>systemctl suspend</literal>" or
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similar.</para>
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<para>Internally, this service will echo a string like
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"<literal>mem</literal>" into
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<filename>/sys/power/state</filename>, to trigger the
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actual system suspend. What exactly is written
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where can be configured in the <literal>[Sleep]</literal>
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section of <filename>/etc/systemd/sleep.conf</filename>.
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See <citerefentry><refentrytitle>systemd-sleep.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para><command>systemd-sleep</command> understands the
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following commands:</para>
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<variablelist>
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<varlistentry>
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<term><option>-h</option></term>
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<term><option>--help</option></term>
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<listitem><para>Print a short help
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text and exit.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--version</option></term>
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<listitem><para>Print the systemd version
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identifier and exit.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>suspend</option></term>
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<term><option>hibernate</option></term>
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<term><option>hybrid-sleep</option></term>
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<listitem><para>Suspend, hibernate, or
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put the system to hybrid sleep.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd-sleep.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-halt.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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