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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
<?xml version='1.0'?> <!--*-nxml-*-->
<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
<!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 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="systemd.timer">
<refentryinfo>
<title>systemd.timer</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.timer</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd.timer</refname>
<refpurpose>systemd timer configuration files</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>systemd.timer</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>A unit configuration file whose name ends in
<filename>.timer</filename> encodes information about
a timer controlled and supervised by systemd, for
timer-based activation.</para>
<para>This man page lists the configuration options
specific to this unit type. See
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for the common options of all unit configuration
files. The common configuration items are configured
in the generic [Unit] and [Install] sections. The
timer specific configuration options are configured in
the [Timer] section.</para>
<para>For each timer file a matching unit file must
exist, describing the unit to activate when the timer
elapses. By default a service by the same name as the
timer (except for the suffix) is activated. Example: a
timer file <filename>foo.timer</filename> activates a
matching service <filename>foo.service</filename>. The
unit to activate may be controlled by
<varname>Unit=</varname> (see below).</para>
</refsect1>
<refsect1>
<title>Options</title>
<para>Timer files must include a [Timer] section,
which carries information about the timer it
defines. The options specific to the [Timer] section
of timer units are the following:</para>
<variablelist>
<varlistentry>
<term><varname>OnActive=</varname></term>
<term><varname>OnBootup=</varname></term>
<term><varname>OnStartup=</varname></term>
<term><varname>OnUnitActive=</varname></term>
<term><varname>OnUnitInactive=</varname></term>
<listitem><para>Defines timers
relative to different starting points:
<varname>OnActive=</varname> defines a
timer relative to the moment the timer
itself is
activated. <varname>OnBootup=</varname>
defines a timer relative to when the
machine was booted
up. <varname>OnStartup=</varname>
defines a timer relative to when
systemd was
started. <varname>OnUnitActive=</varname>
defines a timer relative to when the
unit the timer is activating was last
activated. <varname>OnUnitInactive=</varname>
defines a timer relative to when the
unit the timer is activating was last
deactivated.</para>
<para>Multiple directives may be
combined, of the same and of different
types. For example, by combining
<varname>OnBoot=</varname> and
<varname>OnUnitActive=</varname> it is
possible to define a timer that
elapses in regular intervals and
activates a specific service each
time.</para>
<para>The arguments to the directives
are time spans configured in
seconds. Example: "OnBoot=50" means
50s after boot-up. The argument may
also include time units. Example:
"OnBoot=5h 30min" means 5 hours and 30
minutes after boot-up. For details
about the syntax of time spans see
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
<para>If a timer configured with
<varname>OnBootup=</varname> or
<varname>OnStartup=</varname> is
already in the past when the timer
unit is activated, it will immediately
elapse and the configured unit is
started. This is not the case for
timers defined in the other
directives.</para></listitem>
<para>These are monotonic timers,
independant of wall-clock time and timezones. If the
computer is temporarily suspended, the
monotonic clock stops too.</para>
</varlistentry>
<varlistentry>
<term><varname>Unit=</varname></term>
<listitem><para>The unit to activate
when this timer elapses. Argument is a
unit name, whose suffix is not
<filename>.timer</filename>. If not
specified this value defaults to a
service that has the same name as the
timer unit, except for the
suffix. (See above.) It is recommended
that the unit name that is activated
and the unit name of the timer unit
is chosen identical except for the
suffix.</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
|
