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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.
177 lines
7.8 KiB
XML
177 lines
7.8 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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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 2012 Lennart Poettering
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-->
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<refentry id="systemd.kill">
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<refentryinfo>
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<title>systemd.kill</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.kill</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd.kill</refname>
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<refpurpose>Process killing procedure
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configuration</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename><replaceable>service</replaceable>.service</filename>,
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<filename><replaceable>socket</replaceable>.socket</filename>,
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<filename><replaceable>mount</replaceable>.mount</filename>,
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<filename><replaceable>swap</replaceable>.swap</filename>,
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<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>Unit configuration files for services, sockets, mount
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points, swap devices and scopes share a subset of configuration
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options which define the killing procedure of processes belonging
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to the unit.</para>
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<para>This man page lists the configuration options shared by
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these five unit types. See
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for the common options shared by all unit configuration files, and
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<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.swap</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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and
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<citerefentry><refentrytitle>systemd.scope</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for more information on the configuration file options specific to
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each unit type.</para>
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<para>The kill procedure configuration options are configured in
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the [Service], [Socket], [Mount] or [Swap] section, depending on
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the unit type.</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<variablelist class='unit-directives'>
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<varlistentry>
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<term><varname>KillMode=</varname></term>
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<listitem><para>Specifies how processes of this unit shall be
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killed. One of
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<option>control-group</option>,
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<option>process</option>,
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<option>mixed</option>,
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<option>none</option>.</para>
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<para>If set to <option>control-group</option>, all remaining
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processes in the control group of this unit will be killed on
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unit stop (for services: after the stop command is executed,
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as configured with <varname>ExecStop=</varname>). If set to
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<option>process</option>, only the main process itself is
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killed. If set to <option>mixed</option>, the
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<constant>SIGTERM</constant> signal (see below) is sent to the
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main process while the subsequent <constant>SIGKILL</constant>
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signal (see below) is sent to all remaining processes of the
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unit's control group. If set to <option>none</option>, no
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process is killed. In this case, only the stop command will be
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executed on unit stop, but no process be killed otherwise.
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Processes remaining alive after stop are left in their control
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group and the control group continues to exist after stop
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unless it is empty.</para>
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<para>Processes will first be terminated via
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<constant>SIGTERM</constant> (unless the signal to send is
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changed via <varname>KillSignal=</varname>). Optionally, this
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is immediately followed by a <constant>SIGHUP</constant> (if
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enabled with <varname>SendSIGHUP=</varname>). If then, after a
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delay (configured via the <varname>TimeoutStopSec=</varname>
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option), processes still remain, the termination request is
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repeated with the <constant>SIGKILL</constant> signal (unless
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this is disabled via the <varname>SendSIGKILL=</varname>
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option). See
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<citerefentry><refentrytitle>kill</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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for more information.</para>
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<para>Defaults to
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<option>control-group</option>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>KillSignal=</varname></term>
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<listitem><para>Specifies which signal to use when killing a
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service. This controls the signal that is sent as first step
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of shutting down a unit (see above), and is usually followed
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by <constant>SIGKILL</constant> (see above and below). For a
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list of valid signals, see
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<citerefentry project='man-pages'><refentrytitle>signal</refentrytitle><manvolnum>7</manvolnum></citerefentry>.
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Defaults to <constant>SIGTERM</constant>. </para>
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<para>Note that, right after sending the signal specified in
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this setting, systemd will always send
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<constant>SIGCONT</constant>, to ensure that even suspended
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tasks can be terminated cleanly.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>SendSIGHUP=</varname></term>
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<listitem><para>Specifies whether to send
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<constant>SIGHUP</constant> to remaining processes immediately
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after sending the signal configured with
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<varname>KillSignal=</varname>. This is useful to indicate to
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shells and shell-like programs that their connection has been
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severed. Takes a boolean value. Defaults to "no".
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>SendSIGKILL=</varname></term>
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<listitem><para>Specifies whether to send
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<constant>SIGKILL</constant> to remaining processes after a
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timeout, if the normal shutdown procedure left processes of
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the service around. Takes a boolean value. Defaults to "yes".
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</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>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.unit</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.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.swap</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>kill</refentrytitle><manvolnum>2</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>signal</refentrytitle><manvolnum>7</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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