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[elogind.git] / man / systemd.scope.xml
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4 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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9 Copyright 2013 Zbigniew JÄ™drzejewski-Szmek
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24
25 <refentry id="systemd.scope">
26   <refentryinfo>
27     <title>systemd.scope</title>
28     <productname>systemd</productname>
29
30     <authorgroup>
31       <author>
32         <contrib>Developer</contrib>
33         <firstname>Lennart</firstname>
34         <surname>Poettering</surname>
35         <email>lennart@poettering.net</email>
36       </author>
37     </authorgroup>
38   </refentryinfo>
39
40   <refmeta>
41     <refentrytitle>systemd.scope</refentrytitle>
42     <manvolnum>5</manvolnum>
43   </refmeta>
44
45   <refnamediv>
46     <refname>systemd.scope</refname>
47     <refpurpose>Scope unit configuration</refpurpose>
48   </refnamediv>
49
50   <refsynopsisdiv>
51     <para><filename><replaceable>scope</replaceable>.scope</filename></para>
52   </refsynopsisdiv>
53
54   <refsect1>
55     <title>Description</title>
56
57     <para>Scope units are not configured via unit configuration files,
58     but are only created programmatically using the bus interfaces of
59     systemd. They are named similar to filenames. A unit whose name
60     ends in <literal>.scope</literal> refers to a scope unit. Scopes
61     units manage a set of system processes. Unlike service units, scope
62     units manage externally created processes, and do not fork off
63     processes on its own.</para>
64
65     <para>The main purpose of scope units is grouping worker processes
66     of a system service for organization and for managing resources.</para>
67
68     <para><command>systemd-run <option>--scope</option></command> may
69     be used to easily launch a command in a new scope unit from the
70     command line.</para>
71
72     <para>See the <ulink
73     url="http://www.freedesktop.org/wiki/Software/systemd/ControlGroupInterface/">New
74     Control Group Interfaces</ulink> for an introduction on how to make
75     use of scope units from programs.</para>
76
77     <para>Unless <varname>DefaultDependencies=false</varname>
78     is used, scope units will implicitly have dependencies of
79     type <varname>Conflicts=</varname> and
80     <varname>Before=</varname> on
81     <filename>shutdown.target</filename>. These ensure
82     that scope units are removed prior to system
83     shutdown. Only scope units involved with early boot or
84     late system shutdown should disable this option.
85     </para>
86   </refsect1>
87
88   <refsect1>
89     <title>See Also</title>
90     <para>
91       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
92       <citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
93       <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
94       <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
95       <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
96       <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>.
97     </para>
98   </refsect1>
99
100 </refentry>