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5430f7f2bc
We finally got the OK from all contributors with non-trivial commits to relicense systemd from GPL2+ to LGPL2.1+. Some udev bits continue to be GPL2+ for now, but we are looking into relicensing them too, to allow free copy/paste of all code within systemd. The bits that used to be MIT continue to be MIT. The big benefit of the relicensing is that closed source code may now link against libsystemd-login.so and friends.
838 lines
47 KiB
XML
838 lines
47 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 2010 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.service">
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<refentryinfo>
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<title>systemd.service</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.service</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd.service</refname>
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<refpurpose>systemd service configuration files</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>systemd.service</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>A unit configuration file whose name ends in
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<filename>.service</filename> encodes information
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about a process controlled and supervised by
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systemd.</para>
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<para>This man page lists the configuration options
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specific to this unit type. See
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for the common options of all unit configuration
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files. The common configuration items are configured
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in the generic <literal>[Unit]</literal> and
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<literal>[Install]</literal> sections. The service
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specific configuration options are configured in the
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<literal>[Service]</literal> section.</para>
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<para>Additional options are listed in
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<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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which define the execution environment the commands
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are executed in.</para>
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<para>Unless <varname>DefaultDependencies=</varname>
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is set to <option>false</option>, service units will
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implicitly have dependencies of type
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<varname>Requires=</varname> and
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<varname>After=</varname> on
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<filename>basic.target</filename> as well as
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dependencies of 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 normal service units pull in basic system
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initialization, and are terminated cleanly prior to
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system shutdown. Only services involved with early
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boot or late system shutdown should disable this
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option.</para>
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<para>If a service is requested under a certain name
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but no unit configuration file is found, systemd looks
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for a SysV init script by the same name (with the
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<filename>.service</filename> suffix removed) and
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dynamically creates a service unit from that
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script. This is useful for compatibility with
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SysV.</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para>Service files must include a
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<literal>[Service]</literal> section, which carries
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information about the service and the process it
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supervises. A number of options that may be used in
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this section are shared with other unit types. These
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options are documented in
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<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>. The
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options specific to the <literal>[Service]</literal>
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section of service units are the following:</para>
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<variablelist>
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<varlistentry>
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<term><varname>Type=</varname></term>
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<listitem><para>Configures the process
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start-up type for this service
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unit. One of <option>simple</option>,
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<option>forking</option>,
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<option>oneshot</option>,
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<option>dbus</option>,
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<option>notify</option>.</para>
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<para>If set to
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<option>simple</option> (the default
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value) it is expected that the process
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configured with
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<varname>ExecStart=</varname> is the
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main process of the service. In this
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mode, if the process offers
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functionality to other processes on
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the system its communication channels
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should be installed before the daemon
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is started up (e.g. sockets set up by
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systemd, via socket activation), as
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systemd will immediately proceed
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starting follow-up units.</para>
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<para>If set to
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<option>forking</option> it is
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expected that the process configured
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with <varname>ExecStart=</varname>
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will call <function>fork()</function>
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as part of its start-up. The parent process is
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expected to exit when start-up is
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complete and all communication
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channels set up. The child continues
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to run as the main daemon
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process. This is the behaviour of
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traditional UNIX daemons. If this
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setting is used, it is recommended to
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also use the
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<varname>PIDFile=</varname> option, so
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that systemd can identify the main
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process of the daemon. systemd will
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proceed starting follow-up units as
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soon as the parent process
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exits.</para>
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<para>Behaviour of
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<option>oneshot</option> is similar
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to <option>simple</option>, however
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it is expected that the process has to
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exit before systemd starts follow-up
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units. <varname>RemainAfterExit=</varname>
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is particularly useful for this type
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of service.</para>
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<para>Behaviour of
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<option>dbus</option> is similar to
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<option>simple</option>, however it is
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expected that the daemon acquires a
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name on the D-Bus bus, as configured
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by
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<varname>BusName=</varname>. systemd
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will proceed starting follow-up units
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after the D-Bus bus name has been
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acquired. Service units with this
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option configured implicitly gain
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dependencies on the
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<filename>dbus.socket</filename>
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unit.</para>
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<para>Behaviour of
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<option>notify</option> is similar to
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<option>simple</option>, however it is
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expected that the daemon sends a
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notification message via
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<citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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or an equivalent call when it finished
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starting up. systemd will proceed
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starting follow-up units after this
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notification message has been sent. If
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this option is used
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<varname>NotifyAccess=</varname> (see
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below) should be set to open access to
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the notification socket provided by
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systemd. If
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<varname>NotifyAccess=</varname> is
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not set, it will be implicitly set to
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<option>main</option>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>RemainAfterExit=</varname></term>
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<listitem><para>Takes a boolean value
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that specifies whether the service
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shall be considered active even when
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all its processes exited. Defaults to
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<option>no</option>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>GuessMainPID=</varname></term>
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<listitem><para>Takes a boolean value
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that specifies whether systemd should
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try to guess the main PID of a service
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should if it cannot be determined
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reliably. This option is ignored
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unless <option>Type=forking</option>
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is set and <option>PIDFile=</option>
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is unset because for the other types
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or with an explicitly configured PID
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file the main PID is always known. The
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guessing algorithm might come to
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incorrect conclusions if a daemon
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consists of more than one process. If
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the main PID cannot be determined
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failure detection and automatic
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restarting of a service will not work
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reliably. Defaults to
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<option>yes</option>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>PIDFile=</varname></term>
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<listitem><para>Takes an absolute file
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name pointing to the PID file of this
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daemon. Use of this option is
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recommended for services where
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<varname>Type=</varname> is set to
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<option>forking</option>. systemd will
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read the PID of the main process of
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the daemon after start-up of the
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service. systemd will not write to the
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file configured here.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>BusName=</varname></term>
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<listitem><para>Takes a D-Bus bus
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name, where this service is reachable
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as. This option is mandatory for
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services where
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<varname>Type=</varname> is set to
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<option>dbus</option>, but its use
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is otherwise recommended as well if
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the process takes a name on the D-Bus
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bus.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>ExecStart=</varname></term>
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<listitem><para>Takes a command line
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that is executed when this service
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shall be started up. The first token
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of the command line must be an
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absolute file name, then followed by
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arguments for the process. It is
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mandatory to set this option for all
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services. This option may not be
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specified more than once, except when
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<varname>Type=oneshot</varname> is
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used in which case more than one
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<varname>ExecStart=</varname> line is
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accepted which are then invoked one by
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one, sequentially in the order they
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appear in the unit file.</para>
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<para>Optionally, if the absolute file
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name is prefixed with
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<literal>@</literal>, the second token
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will be passed as
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<literal>argv[0]</literal> to the
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executed process, followed by the
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further arguments specified. If the
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first token is prefixed with
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<literal>-</literal> an exit code of
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the command normally considered a
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failure (i.e. non-zero exit status or
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abnormal exit due to signal) is ignored
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and considered success. If both
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<literal>-</literal> and
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<literal>@</literal> are used for the
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same command the former must precede
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the latter. Unless
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<varname>Type=forking</varname> is
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set, the process started via this
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command line will be considered the
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main process of the daemon. The
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command line accepts % specifiers as
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described in
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
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<para>On top of that basic environment
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variable substitution is
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supported. Use
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<literal>${FOO}</literal> as part of a
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word, or as word of its own on the
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command line, in which case it will be
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replaced by the value of the
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environment variable including all
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whitespace it contains, resulting in a
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single argument. Use
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<literal>$FOO</literal> as a separate
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word on the command line, in which
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case it will be replaced by the value
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of the environment variable split up
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at whitespace, resulting in no or more
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arguments. Note that the first
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argument (i.e. the program to execute)
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may not be a variable, and must be a
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literal and absolute path
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name.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>ExecStartPre=</varname></term>
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<term><varname>ExecStartPost=</varname></term>
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<listitem><para>Additional commands
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that are executed before (resp. after)
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the command in
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<varname>ExecStart=</varname>. Multiple
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command lines may be concatenated in a
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single directive, by separating them
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by semicolons (these semicolons must
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be passed as separate words). In that
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case, the commands are executed one
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after the other,
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serially. Alternatively, these
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directives may be specified more than
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once with the same effect. However,
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the latter syntax is not recommended
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for compatibility with parsers
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suitable for XDG
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<filename>.desktop</filename> files.
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Use of these settings is
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optional. Specifier and environment
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variable substitution is
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supported.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>ExecReload=</varname></term>
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<listitem><para>Commands to execute to
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trigger a configuration reload in the
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service. This argument takes multiple
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command lines, following the same
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scheme as pointed out for
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<varname>ExecStartPre=</varname>
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above. Use of this setting is
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optional. Specifier and environment
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variable substitution is supported
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here following the same scheme as for
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<varname>ExecStart=</varname>. One
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special environment variable is set:
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if known <literal>$MAINPID</literal> is
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set to the main process of the
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daemon, and may be used for command
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lines like the following:
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<command>/bin/kill -HUP
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$MAINPID</command>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>ExecStop=</varname></term>
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<listitem><para>Commands to execute to
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stop the service started via
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<varname>ExecStart=</varname>. This
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argument takes multiple command lines,
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following the same scheme as pointed
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out for
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<varname>ExecStartPre=</varname>
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above. Use of this setting is
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optional. All processes remaining for
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a service after the commands
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configured in this option are run are
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terminated according to the
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<varname>KillMode=</varname> setting
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(see below). If this option is not
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specified the process is terminated
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right-away when service stop is
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requested. Specifier and environment
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variable substitution is supported
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(including
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<literal>$MAINPID</literal>, see
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above).</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>ExecStopPost=</varname></term>
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<listitem><para>Additional commands
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that are executed after the service
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was stopped using the commands
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configured in
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<varname>ExecStop=</varname>. This
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argument takes multiple command lines,
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following the same scheme as pointed
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out for
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<varname>ExecStartPre</varname>. Use
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of these settings is
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optional. Specifier and environment
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variable substitution is
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supported.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>RestartSec=</varname></term>
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<listitem><para>Configures the time to
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sleep before restarting a service (as
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configured with
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<varname>Restart=</varname>). Takes a
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unit-less value in seconds, or a time
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span value such as "5min
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20s". Defaults to
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100ms.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>TimeoutSec=</varname></term>
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<listitem><para>Configures the time to
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wait for start-up and stop. If a
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daemon service does not signal
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start-up completion within the
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configured time the service will be
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considered failed and be shut down
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again. If a service is asked to stop
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|
but does not terminate in the
|
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specified time it will be terminated
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|
forcibly via SIGTERM, and after
|
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another delay of this time with
|
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SIGKILL. (See
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<varname>KillMode=</varname>
|
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below.) Takes a unit-less value in seconds, or a
|
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time span value such as "5min
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20s". Pass 0 to disable the timeout
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logic. Defaults to
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90s.</para></listitem>
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</varlistentry>
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|
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<varlistentry>
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<term><varname>WatchdogSec=</varname></term>
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<listitem><para>Configures the
|
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watchdog timeout for a service. This
|
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is activated when the start-up is
|
|
completed. The service must call
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<citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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regularly with "WATCHDOG=1". If the
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|
time between two such calls is larger
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than the configured time then the
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service is placed in a failure
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|
state. By setting
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|
<varname>Restart=</varname>
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to <option>on-failure</option> or
|
|
<option>always</option> the service
|
|
will be automatically restarted. The
|
|
time configured here will be passed to
|
|
the executed service process in the
|
|
<varname>WATCHDOG_USEC=</varname>
|
|
environment variable. If
|
|
this option is used
|
|
<varname>NotifyAccess=</varname> (see
|
|
below) should be set to open access to
|
|
the notification socket provided by
|
|
systemd. If
|
|
<varname>NotifyAccess=</varname> is not
|
|
set, it will be implicitly set to
|
|
<option>main</option>. Defaults to 0,
|
|
which disables this
|
|
feature.</para></listitem>
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</varlistentry>
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|
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<varlistentry>
|
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<term><varname>Restart=</varname></term>
|
|
<listitem><para>Configures whether the
|
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main service process shall be
|
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restarted when it exits. Takes one of
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<option>no</option>,
|
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<option>on-success</option>,
|
|
<option>on-failure</option>,
|
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<option>on-abort</option> or
|
|
<option>always</option>. If set to
|
|
<option>no</option> (the default) the
|
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service will not be restarted when it
|
|
exits. If set to
|
|
<option>on-success</option> it will be
|
|
restarted only when it exited cleanly,
|
|
i.e. terminated with an exit code of
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0. If set to
|
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<option>on-failure</option> it will be
|
|
restarted only when it exited with an
|
|
exit code not equalling 0, when
|
|
terminated by a signal, when an
|
|
operation times out or when the
|
|
configured watchdog timeout is
|
|
triggered. If set to
|
|
<option>on-abort</option> it will be
|
|
restarted only if it exits due to
|
|
reception of an uncaught signal. If
|
|
set to <option>always</option> the
|
|
service will be restarted regardless
|
|
whether it exited cleanly or not,
|
|
got terminated abnormally by a
|
|
signal or hit a timeout.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>PermissionsStartOnly=</varname></term>
|
|
<listitem><para>Takes a boolean
|
|
argument. If true, the permission
|
|
related execution options as
|
|
configured with
|
|
<varname>User=</varname> and similar
|
|
options (see
|
|
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for more information) are only applied
|
|
to the process started with
|
|
<varname>ExecStart=</varname>, and not
|
|
to the various other
|
|
<varname>ExecStartPre=</varname>,
|
|
<varname>ExecStartPost=</varname>,
|
|
<varname>ExecReload=</varname>,
|
|
<varname>ExecStop=</varname>,
|
|
<varname>ExecStopPost=</varname>
|
|
commands. If false, the setting is
|
|
applied to all configured commands the
|
|
same way. Defaults to
|
|
false.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>RootDirectoryStartOnly=</varname></term>
|
|
<listitem><para>Takes a boolean
|
|
argument. If true, the root directory
|
|
as configured with the
|
|
<varname>RootDirectory=</varname>
|
|
option (see
|
|
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for more information) is only applied
|
|
to the process started with
|
|
<varname>ExecStart=</varname>, and not
|
|
to the various other
|
|
<varname>ExecStartPre=</varname>,
|
|
<varname>ExecStartPost=</varname>,
|
|
<varname>ExecReload=</varname>,
|
|
<varname>ExecStop=</varname>,
|
|
<varname>ExecStopPost=</varname>
|
|
commands. If false, the setting is
|
|
applied to all configured commands the
|
|
same way. Defaults to
|
|
false.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>SysVStartPriority=</varname></term>
|
|
<listitem><para>Set the SysV start
|
|
priority to use to order this service
|
|
in relation to SysV services lacking
|
|
LSB headers. This option is only
|
|
necessary to fix ordering in relation
|
|
to legacy SysV services, that have no
|
|
ordering information encoded in the
|
|
script headers. As such it should only
|
|
be used as temporary compatibility
|
|
option, and not be used in new unit
|
|
files. Almost always it is a better
|
|
choice to add explicit ordering
|
|
directives via
|
|
<varname>After=</varname> or
|
|
<varname>Before=</varname>,
|
|
instead. For more details see
|
|
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>. If
|
|
used, pass an integer value in the
|
|
range 0-99.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>KillMode=</varname></term>
|
|
<listitem><para>Specifies how
|
|
processes of this service shall be
|
|
killed. One of
|
|
<option>control-group</option>,
|
|
<option>process</option>,
|
|
<option>none</option>.</para>
|
|
|
|
<para>If set to
|
|
<option>control-group</option> all
|
|
remaining processes in the control
|
|
group of this service will be
|
|
terminated on service stop, after the
|
|
stop command (as configured with
|
|
<varname>ExecStop=</varname>) is
|
|
executed. If set to
|
|
<option>process</option> only the main
|
|
process itself is killed. If set to
|
|
<option>none</option> no process is
|
|
killed. In this case only the stop
|
|
command will be executed on service
|
|
stop, but no process be killed
|
|
otherwise. Processes remaining alive
|
|
after stop are left in their control
|
|
group and the control group continues
|
|
to exist after stop unless it is
|
|
empty. Defaults to
|
|
<option>control-group</option>.</para>
|
|
|
|
<para>Processes will first be
|
|
terminated via SIGTERM (unless the
|
|
signal to send is changed via
|
|
<varname>KillSignal=</varname>). If
|
|
then after a delay (configured via the
|
|
<varname>TimeoutSec=</varname> option)
|
|
processes still remain, the
|
|
termination request is repeated with
|
|
the SIGKILL signal (unless this is
|
|
disabled via the
|
|
<varname>SendSIGKILL=</varname>
|
|
option). See
|
|
<citerefentry><refentrytitle>kill</refentrytitle><manvolnum>2</manvolnum></citerefentry>
|
|
for more
|
|
information.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>KillSignal=</varname></term>
|
|
<listitem><para>Specifies which signal
|
|
to use when killing a
|
|
service. Defaults to SIGTERM.
|
|
</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>SendSIGKILL=</varname></term>
|
|
<listitem><para>Specifies whether to
|
|
send SIGKILL to remaining processes
|
|
after a timeout, if the normal
|
|
shutdown procedure left processes of
|
|
the service around. Takes a boolean
|
|
value. Defaults to "yes".
|
|
</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>NonBlocking=</varname></term>
|
|
<listitem><para>Set O_NONBLOCK flag
|
|
for all file descriptors passed via
|
|
socket-based activation. If true, all
|
|
file descriptors >= 3 (i.e. all except
|
|
STDIN/STDOUT/STDERR) will have
|
|
the O_NONBLOCK flag set and hence are in
|
|
non-blocking mode. This option is only
|
|
useful in conjunction with a socket
|
|
unit, as described in
|
|
<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>. Defaults
|
|
to false.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>NotifyAccess=</varname></term>
|
|
<listitem><para>Controls access to the
|
|
service status notification socket, as
|
|
accessible via the
|
|
<citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
call. Takes one of
|
|
<option>none</option> (the default),
|
|
<option>main</option> or
|
|
<option>all</option>. If
|
|
<option>none</option> no daemon status
|
|
updates are accepted from the service
|
|
processes, all status update messages
|
|
are ignored. If <option>main</option>
|
|
only service updates sent from the
|
|
main process of the service are
|
|
accepted. If <option>all</option> all
|
|
services updates from all members of
|
|
the service's control group are
|
|
accepted. This option should be set to
|
|
open access to the notification socket
|
|
when using
|
|
<varname>Type=notify</varname> or
|
|
<varname>WatchdogUsec=</varname> (see
|
|
above). If those options are used but
|
|
<varname>NotifyAccess=</varname> not
|
|
configured it will be implicitly set
|
|
to
|
|
<option>main</option>.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>Sockets=</varname></term>
|
|
<listitem><para>Specifies the name of
|
|
the socket units this service shall
|
|
inherit the sockets from when the
|
|
service is started. Normally it
|
|
should not be necessary to use this
|
|
setting as all sockets whose unit
|
|
shares the same name as the service
|
|
(ignoring the different suffix of course)
|
|
are passed to the spawned
|
|
process.</para>
|
|
|
|
<para>Note that the same socket may be
|
|
passed to multiple processes at the
|
|
same time. Also note that a different
|
|
service may be activated on incoming
|
|
traffic than inherits the sockets. Or
|
|
in other words: The
|
|
<varname>Service=</varname> setting of
|
|
<filename>.socket</filename> units
|
|
doesn't have to match the inverse of the
|
|
<varname>Sockets=</varname> setting of
|
|
the <filename>.service</filename> it
|
|
refers to.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>FsckPassNo=</varname></term>
|
|
<listitem><para>Set the fsck passno
|
|
priority to use to order this service
|
|
in relation to other file system
|
|
checking services. This option is only
|
|
necessary to fix ordering in relation
|
|
to fsck jobs automatically created for
|
|
all <filename>/etc/fstab</filename>
|
|
entries with a value in the fs_passno
|
|
column > 0. As such it should only be
|
|
used as option for fsck
|
|
services. Almost always it is a better
|
|
choice to add explicit ordering
|
|
directives via
|
|
<varname>After=</varname> or
|
|
<varname>Before=</varname>,
|
|
instead. For more details see
|
|
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>. If
|
|
used, pass an integer value in the
|
|
same range as
|
|
<filename>/etc/fstab</filename>'s
|
|
fs_passno column. See
|
|
<citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
for details.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>StartLimitInterval=</varname></term>
|
|
<term><varname>StartLimitBurst=</varname></term>
|
|
|
|
<listitem><para>Configure service
|
|
start rate limiting. By default
|
|
services which are started more often
|
|
than 5 times within 10s are not
|
|
permitted to start any more times
|
|
until the 10s interval ends. With
|
|
these two options this rate limiting
|
|
may be modified. Use
|
|
<varname>StartLimitInterval=</varname>
|
|
to configure the checking interval
|
|
(defaults to 10s, set to 0 to disable
|
|
any kind of rate limiting). Use
|
|
<varname>StartLimitBurst=</varname> to
|
|
configure how many starts per interval
|
|
are allowed (defaults to 5). These
|
|
configuration options are particularly
|
|
useful in conjunction with
|
|
<varname>Restart=</varname>.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>StartLimitAction=</varname></term>
|
|
|
|
<listitem><para>Configure the action
|
|
to take if the rate limit configured
|
|
with
|
|
<varname>StartLimitInterval=</varname>
|
|
and
|
|
<varname>StartLimitBurst=</varname> is
|
|
hit. Takes one of
|
|
<option>none</option>,
|
|
<option>reboot</option>,
|
|
<option>reboot-force</option> or
|
|
<option>reboot-immediate</option>. If
|
|
<option>none</option> is set,
|
|
hitting the rate limit will trigger no
|
|
action besides that the start will not
|
|
be
|
|
permitted. <option>reboot</option>
|
|
causes a reboot following the normal
|
|
shutdown procedure (i.e. equivalent to
|
|
<command>systemctl reboot</command>),
|
|
<option>reboot-force</option> causes
|
|
an forced reboot which will terminate
|
|
all processes forcibly but should
|
|
cause no dirty file systems on reboot
|
|
(i.e. equivalent to <command>systemctl
|
|
reboot -f</command>) and
|
|
<option>reboot-immediate</option>
|
|
causes immediate execution of the
|
|
<citerefentry><refentrytitle>reboot</refentrytitle><manvolnum>2</manvolnum></citerefentry>
|
|
system call, which might result in
|
|
data loss. Defaults to
|
|
<option>none</option>.</para></listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|