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https://github.com/systemd/systemd
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818bf54632
This part of the copyright blurb stems from the GPL use recommendations: https://www.gnu.org/licenses/gpl-howto.en.html The concept appears to originate in times where version control was per file, instead of per tree, and was a way to glue the files together. Ultimately, we nowadays don't live in that world anymore, and this information is entirely useless anyway, as people are very welcome to copy these files into any projects they like, and they shouldn't have to change bits that are part of our copyright header for that. hence, let's just get rid of this old cruft, and shorten our codebase a bit.
107 lines
3.8 KiB
XML
107 lines
3.8 KiB
XML
<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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SPDX-License-Identifier: LGPL-2.1+
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Copyright 2013 Zbigniew Jędrzejewski-Szmek
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-->
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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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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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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>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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