1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
<?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">
<!--
SPDX-License-Identifier: LGPL-2.1+
-->
<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-suspend-then-hibernate.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>systemd-suspend-then-hibernate.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 and pulled in by
<filename>suspend-then-hibernate.target</filename> to execute system suspend
with a timeout that will activate hibernate later.</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>,
<literal>hybrid-sleep</literal>, or <literal>suspend-then-hibernate</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 react to system suspend/hibernation and resume,
they should rather use the <ulink
url="https://www.freedesktop.org/wiki/Software/systemd/inhibit">Inhibitor
interface</ulink>.</para>
<para>Note that
<filename>systemd-suspend.service</filename>,
<filename>systemd-hibernate.service</filename>, and
<filename>systemd-hybrid-sleep.service</filename>
<filename>systemd-suspend-then-hibernate.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>
<term><option>suspend-then-hibernate</option></term>
<listitem><para>Suspend, hibernate, suspend then 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>
|
