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217 lines
12 KiB
XML
217 lines
12 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
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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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This file is part of systemd.
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Copyright 2012 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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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,
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mount points, swap devices and scopes share a subset
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of configuration options which define the
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killing procedure of processes belonging to the unit.</para>
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<para>This man page lists the configuration options
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shared by 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
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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
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specific to each unit type.</para>
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<para>The kill procedure
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configuration options are configured in the [Service],
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[Socket], [Mount] or [Swap] section, depending on the
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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
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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
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<option>control-group</option>, all
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remaining processes in the control
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group of this unit will be killed on
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unit stop (for services: after the
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stop command is executed, as
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configured with
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<varname>ExecStop=</varname>). If set
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to <option>process</option>, only the
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main process itself is killed. If set
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to <option>mixed</option>, the
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<constant>SIGTERM</constant> signal
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(see below) is sent to the main
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process while the subsequent
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<constant>SIGKILL</constant> signal
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(see below) is sent to all remaining
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processes of the unit's control
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group. If set to
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<option>none</option>, no process is
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killed. In this case, only the stop
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command will be executed on unit stop,
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but no process be killed
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otherwise. Processes remaining alive
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after stop are left in their control
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group and the control group continues
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to exist after stop unless it is
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empty.</para>
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<para>Processes will first be
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terminated via
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<constant>SIGTERM</constant> (unless
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the signal to send is changed via
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<varname>KillSignal=</varname>). Optionally,
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this is immediately followed by a
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<constant>SIGHUP</constant> (if
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enabled with
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<varname>SendSIGHUP=</varname>). If
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then, after a delay (configured via the
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<varname>TimeoutStopSec=</varname> option),
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processes still remain, the
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termination request is repeated with
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the <constant>SIGKILL</constant>
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signal (unless this is disabled via
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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
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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
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to use when killing a service. This
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controls the signal that is sent as
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first step of shutting down a unit
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(see above), and is usually followed
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by <constant>SIGKILL</constant> (see
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above and below). For a list of valid
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signals, see
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<citerefentry><refentrytitle>signal</refentrytitle><manvolnum>7</manvolnum></citerefentry>. Defaults
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to <constant>SIGTERM</constant>.
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</para></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
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send <constant>SIGHUP</constant> to
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remaining processes immediately after
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sending the signal configured with
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<varname>KillSignal=</varname>. This
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is useful to indicate to shells and
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shell-like programs that their
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connection has been severed. Takes a
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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
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send <constant>SIGKILL</constant> to remaining processes
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after a timeout, if the normal
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shutdown procedure left processes of
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the service around. Takes a boolean
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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>8</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><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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