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9ed7de605d
Just as `RuntimeMaxSec=` is supported for service units, add support for it to scope units. This will gracefully kill a scope after the timeout expires from the moment the scope enters the running state. This could be used for time-limited login sessions, for example. Signed-off-by: Philip Withnall <withnall@endlessm.com> Fixes: #12035
118 lines
4.6 KiB
XML
118 lines
4.6 KiB
XML
<?xml version='1.0'?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!-- SPDX-License-Identifier: LGPL-2.1+ -->
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<refentry id="systemd.scope">
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<refentryinfo>
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<title>systemd.scope</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd.scope</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd.scope</refname>
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<refpurpose>Scope unit configuration</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename><replaceable>scope</replaceable>.scope</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>Scope units are not configured via unit configuration files,
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but are only created programmatically using the bus interfaces of
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systemd. They are named similar to filenames. A unit whose name
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ends in <literal>.scope</literal> refers to a scope unit. Scopes
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units manage a set of system processes. Unlike service units, scope
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units manage externally created processes, and do not fork off
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processes on its own.</para>
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<para>The main purpose of scope units is grouping worker processes
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of a system service for organization and for managing resources.</para>
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<para><command>systemd-run <option>--scope</option></command> may
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be used to easily launch a command in a new scope unit from the
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command line.</para>
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<para>See the <ulink
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url="https://www.freedesktop.org/wiki/Software/systemd/ControlGroupInterface/">New
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Control Group Interfaces</ulink> for an introduction on how to make
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use of scope units from programs.</para>
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</refsect1>
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<refsect1>
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<title>Automatic Dependencies</title>
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<refsect2>
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<title>Implicit Dependencies</title>
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<para>Implicit dependencies may be added as result of
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resource control parameters as documented in
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<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
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</refsect2>
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<refsect2>
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<title>Default Dependencies</title>
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<para>The following dependencies are added unless
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<varname>DefaultDependencies=no</varname> is set:</para>
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<itemizedlist>
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<listitem><para>Scope units will automatically have dependencies of
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type <varname>Conflicts=</varname> and
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<varname>Before=</varname> on
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<filename>shutdown.target</filename>. These ensure
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that scope units are removed prior to system
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shutdown. Only scope units involved with early boot or
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late system shutdown should disable
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<varname>DefaultDependencies=</varname> option.</para></listitem>
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</itemizedlist>
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</refsect2>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para>Scope files may include a <literal>[Scope]</literal>
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section, which carries information about the scope and the
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units it contains. A number of options that may be used in
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this section are shared with other unit types. These options are
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documented in
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<citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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and
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<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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The options specific to the <literal>[Scope]</literal> section
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of scope units are the following:</para>
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<variablelist class='unit-directives'>
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<varlistentry>
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<term><varname>RuntimeMaxSec=</varname></term>
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<listitem><para>Configures a maximum time for the scope to run. If this is used and the scope has been
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active for longer than the specified time it is terminated and put into a failure state. Pass
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<literal>infinity</literal> (the default) to configure no runtime limit.</para></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</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-run</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>.
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</para>
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</refsect1>
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</refentry>
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