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+<?xml version='1.0'?> <!--*-nxml-*-->
+<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+
+<!--
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<refentry id="systemd.service">
+ <refentryinfo>
+ <title>systemd.service</title>
+ <productname>systemd</productname>
+
+ <authorgroup>
+ <author>
+ <contrib>Developer</contrib>
+ <firstname>Lennart</firstname>
+ <surname>Poettering</surname>
+ <email>lennart@poettering.net</email>
+ </author>
+ </authorgroup>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>systemd.service</refentrytitle>
+ <manvolnum>5</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd.service</refname>
+ <refpurpose>systemd service configuration files</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>systemd.service</filename></para>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>A configuration file ending in .service encodes
+ information about a process controlled and supervised
+ by systemd.</para>
+
+ <para>This man page lists the configuration options
+ specific to this unit type. See
+ <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ for the common options of all unit configuration
+ files.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Options</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><varname>Type=</varname></term>
+ <listitem>
+ <para>One of
+ <literal>forking</literal>,
+ <literal>simple</literal>,
+ <literal>finish</literal>,
+ <literal>dbus</literal>.</para>
+
+ <para>If set to
+ <literal>forking</literal>
+ (the default) it is expected
+ that the process configured
+ with
+ <varname>ExecStart=</varname>
+ will start up and call
+ <function>fork()</function>. The
+ parent process is expected to
+ finish when start-up is
+ complete and all communication
+ channels set up. The child
+ continues to run as the main
+ daemon process. This is the
+ behaviour of traditional UNIX
+ daemons. If this setting is
+ used it is recommended to also
+ use the
+ <varname>PIDFile=</varname>
+ option, so that systemd can
+ identify the main process of
+ the daemon. systemd will start
+ follow-up units as soon as the
+ parent process exited.</para>
+
+ <para>If set to
+ <literal>simple</literal> (the
+ recommended value) it is
+ expected that the process
+ configured with
+ <varname>ExecStart=</varname>
+ is the main process of the
+ daemon. In this mode
+ communication channels must be
+ available before the daemon is
+ started up, as systemd will
+ immediately start follow-up
+ units.</para>
+
+ <para>Behaviour of
+ <literal>finish</literal> is
+ similar to
+ <literal>simple</literal>,
+ however it is expected that
+ the process has to exit before
+ systemd starts follow-up
+ units. <varname>ValidNoProcess=</varname>
+ is particularly useful for
+ this type of service.</para>
+
+ <para>Behaviour of
+ <literal>dbus</literal> is
+ similar to
+ <literal>simple</literal>,
+ however it is expected that
+ the daemon acquires a name on
+ the D-Bus bus, as configured
+ by
+ <varname>BusName=</varname>. Follow-up
+ units will be started after
+ the name has been
+ acquired.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>ValidNoProcess=</varname></term>
+ <listitem>
+ <para>Takes a boolean value
+ that specifies whether the service
+ shall be considered active
+ even when all its processes
+ exited. Defaults to <literal>no</literal>.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>PIDFile=</varname></term>
+ <listitem>
+ <para>Takes an absolute file
+ name pointing to the PID file
+ of this daemon. Use of this
+ option is recommended for
+ services where
+ <varname>Type=</varname> is
+ set to
+ <literal>forking</literal>.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>BusName=</varname></term>
+ <listitem>
+ <para>Takes a D-Bus bus name
+ that this service is reachable
+ as. This option is mandatory
+ for services where
+ <varname>Type=</varname> is
+ set to
+ <literal>dbus</literal>, but
+ its use is otherwise
+ recommended as well if the
+ process takes a name on the
+ D-Bus bus.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>ExecStart=</varname></term>
+ <listitem>
+ <para>Takes a command line
+ that is executed when this
+ service shall be started
+ up. The first word of the
+ command line must be an
+ absolute file name. It is
+ mandatory to set this option
+ for all services.</para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>