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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
e735f4d4 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
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4 | |
5 | <!-- | |
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6 | SPDX-License-Identifier: LGPL-2.1+ |
7 | ||
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8 | This file is part of systemd. |
9 | ||
10 | Copyright 2012 Lennart Poettering | |
11 | Copyright 2013 Zbigniew Jędrzejewski-Szmek | |
12 | ||
13 | systemd is free software; you can redistribute it and/or modify it | |
14 | under the terms of the GNU Lesser General Public License as published by | |
15 | the Free Software Foundation; either version 2.1 of the License, or | |
16 | (at your option) any later version. | |
17 | ||
18 | systemd is distributed in the hope that it will be useful, but | |
19 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
21 | Lesser General Public License for more details. | |
22 | ||
23 | You should have received a copy of the GNU Lesser General Public License | |
24 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
25 | --> | |
26 | ||
60f067b4 | 27 | <refentry id="systemd-suspend.service" |
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28 | xmlns:xi="http://www.w3.org/2001/XInclude"> |
29 | ||
30 | <refentryinfo> | |
31 | <title>systemd-suspend.service</title> | |
32 | <productname>systemd</productname> | |
33 | ||
34 | <authorgroup> | |
35 | <author> | |
36 | <contrib>Developer</contrib> | |
37 | <firstname>Lennart</firstname> | |
38 | <surname>Poettering</surname> | |
39 | <email>lennart@poettering.net</email> | |
40 | </author> | |
41 | </authorgroup> | |
42 | </refentryinfo> | |
43 | ||
44 | <refmeta> | |
45 | <refentrytitle>systemd-suspend.service</refentrytitle> | |
46 | <manvolnum>8</manvolnum> | |
47 | </refmeta> | |
48 | ||
49 | <refnamediv> | |
50 | <refname>systemd-suspend.service</refname> | |
51 | <refname>systemd-hibernate.service</refname> | |
52 | <refname>systemd-hybrid-sleep.service</refname> | |
53 | <refname>systemd-sleep</refname> | |
54 | <refpurpose>System sleep state logic</refpurpose> | |
55 | </refnamediv> | |
56 | ||
57 | <refsynopsisdiv> | |
58 | <para><filename>systemd-suspend.service</filename></para> | |
59 | <para><filename>systemd-hibernate.service</filename></para> | |
60 | <para><filename>systemd-hybrid-sleep.service</filename></para> | |
61 | <para><filename>/usr/lib/systemd/system-sleep</filename></para> | |
62 | </refsynopsisdiv> | |
63 | ||
64 | <refsect1> | |
65 | <title>Description</title> | |
66 | ||
67 | <para><filename>systemd-suspend.service</filename> is a system | |
68 | service that is pulled in by <filename>suspend.target</filename> | |
69 | and is responsible for the actual system suspend. Similarly, | |
70 | <filename>systemd-hibernate.service</filename> is pulled in by | |
71 | <filename>hibernate.target</filename> to execute the actual | |
72 | hibernation. Finally, | |
73 | <filename>systemd-hybrid-sleep.service</filename> is pulled in by | |
74 | <filename>hybrid-sleep.target</filename> to execute hybrid | |
75 | hibernation with system suspend.</para> | |
76 | ||
77 | <para>Immediately before entering system suspend and/or | |
78 | hibernation <filename>systemd-suspend.service</filename> (and the | |
79 | other mentioned units, respectively) will run all executables in | |
80 | <filename>/usr/lib/systemd/system-sleep/</filename> and pass two | |
81 | arguments to them. The first argument will be | |
82 | <literal>pre</literal>, the second either | |
83 | <literal>suspend</literal>, <literal>hibernate</literal>, or | |
84 | <literal>hybrid-sleep</literal> depending on the chosen action. | |
85 | Immediately after leaving system suspend and/or hibernation the | |
86 | same executables are run, but the first argument is now | |
87 | <literal>post</literal>. All executables in this directory are | |
88 | executed in parallel, and execution of the action is not continued | |
89 | until all executables have finished.</para> | |
90 | ||
91 | <para>Note that scripts or binaries dropped in | |
92 | <filename>/usr/lib/systemd/system-sleep/</filename> are intended | |
93 | for local use only and should be considered hacks. If applications | |
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94 | want to react to system suspend/hibernation and resume, |
95 | they should rather use the <ulink | |
96 | url="https://www.freedesktop.org/wiki/Software/systemd/inhibit">Inhibitor | |
97 | interface</ulink>.</para> | |
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98 | |
99 | <para>Note that | |
100 | <filename>systemd-suspend.service</filename>, | |
101 | <filename>systemd-hibernate.service</filename>, and | |
102 | <filename>systemd-hybrid-sleep.service</filename> | |
103 | should never be executed directly. Instead, trigger system sleep | |
104 | states with a command such as <literal>systemctl suspend</literal> | |
105 | or similar.</para> | |
106 | ||
107 | <para>Internally, this service will echo a string like | |
108 | <literal>mem</literal> into <filename>/sys/power/state</filename>, | |
109 | to trigger the actual system suspend. What exactly is written | |
110 | where can be configured in the <literal>[Sleep]</literal> section | |
111 | of <filename>/etc/systemd/sleep.conf</filename> or a | |
112 | <filename>sleep.conf.d</filename> file. See | |
113 | <citerefentry><refentrytitle>systemd-sleep.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>. | |
114 | </para> | |
115 | </refsect1> | |
116 | ||
117 | <refsect1> | |
118 | <title>Options</title> | |
119 | ||
120 | <para><command>systemd-sleep</command> understands the | |
121 | following commands:</para> | |
122 | ||
123 | <variablelist> | |
124 | <xi:include href="standard-options.xml" xpointer="help" /> | |
125 | <xi:include href="standard-options.xml" xpointer="version" /> | |
126 | ||
127 | <varlistentry> | |
128 | <term><option>suspend</option></term> | |
129 | <term><option>hibernate</option></term> | |
130 | <term><option>hybrid-sleep</option></term> | |
131 | ||
132 | <listitem><para>Suspend, hibernate, or put the system to | |
133 | hybrid sleep.</para> | |
134 | </listitem> | |
135 | </varlistentry> | |
136 | </variablelist> | |
137 | </refsect1> | |
138 | ||
139 | <refsect1> | |
140 | <title>See Also</title> | |
141 | <para> | |
142 | <citerefentry><refentrytitle>systemd-sleep.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
143 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
144 | <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
145 | <citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>, | |
146 | <citerefentry><refentrytitle>systemd-halt.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
147 | </para> | |
148 | </refsect1> | |
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149 | |
150 | </refentry> |