chiark / gitweb /
man: extend watchdog docs a bit
[elogind.git] / man / systemd.service.xml
index 449fe6561d8fbf08b1801aa759d426aee9d5d3a8..c57bce0ecf125446c834b409e4b0865f2ccc30d7 100644 (file)
@@ -9,16 +9,16 @@
   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
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 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.
+  Lesser General Public License for more details.
 
-  You should have received a copy of the GNU General Public License
+  You should have received a copy of the GNU Lesser General Public License
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 -->
 
         <refsect1>
                 <title>Description</title>
 
-                <para>A configuration file ending in .service encodes
-                information about a process controlled and supervised
-                by systemd.</para>
+                <para>A unit configuration file whose name ends in
+                <filename>.service</filename> 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. The common configuration items are configured
-                in the generic [Unit] and [Install] sections. The
-                service specific configuration options are configured
-                in the [Service] section.</para>
-
-                <para>Additional options are listed in <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
+                in the generic <literal>[Unit]</literal> and
+                <literal>[Install]</literal> sections. The service
+                specific configuration options are configured in the
+                <literal>[Service]</literal> section.</para>
+
+                <para>Additional options are listed in
+                <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+                which define the execution environment the commands
+                are executed in.</para>
+
+                <para>Unless <varname>DefaultDependencies=</varname>
+                is set to <option>false</option>, service units will
+                implicitly have dependencies of type
+                <varname>Requires=</varname> and
+                <varname>After=</varname> on
+                <filename>basic.target</filename> as well as
+                dependencies of type <varname>Conflicts=</varname> and
+                <varname>Before=</varname> on
+                <filename>shutdown.target</filename>. These ensure
+                that normal service units pull in basic system
+                initialization, and are terminated cleanly prior to
+                system shutdown. Only services involved with early
+                boot or late system shutdown should disable this
+                option.</para>
+
+                <para>If a service is requested under a certain name
+                but no unit configuration file is found, systemd looks
+                for a SysV init script by the same name (with the
+                <filename>.service</filename> suffix removed) and
+                dynamically creates a service unit from that
+                script. This is useful for compatibility with
+                SysV.</para>
         </refsect1>
 
         <refsect1>
                 <title>Options</title>
 
-                <para>Service files must include a [Service] section,
-                which carries information about the service and the
-                process it supervises. A number of options that may be
-                used in this section are shared with other unit
-                types. These options are documented in
+                <para>Service files must include a
+                <literal>[Service]</literal> section, which carries
+                information about the service and the process it
+                supervises. A number of options that may be used in
+                this section are shared with other unit types. These
+                options are documented in
                 <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>. The
-                options specific to the [Service] section of service
-                units are the following:</para>
+                options specific to the <literal>[Service]</literal>
+                section of service units are the following:</para>
 
                 <variablelist>
                         <varlistentry>
                                 start-up type for this service
                                 unit. One of <option>simple</option>,
                                 <option>forking</option>,
-                                <option>finish</option>,
+                                <option>oneshot</option>,
                                 <option>dbus</option>,
-                                <option>notify</option>.</para>
+                                <option>notify</option> or
+                                <option>idle</option>.</para>
 
                                 <para>If set to
                                 <option>simple</option> (the default
-                                value) it is expected that the process
-                                configured with
+                                value if <varname>BusName=</varname>
+                                is not specified) it is expected that
+                                the process configured with
                                 <varname>ExecStart=</varname> is the
                                 main process of the service. In this
-                                mode, communication channels must be
-                                installed before the daemon is started
-                                up (e.g. sockets set up by systemd,
-                                via socket activation), as systemd
-                                will immediately proceed starting
-                                follow-up units.</para>
+                                mode, if the process offers
+                                functionality to other processes on
+                                the system its communication channels
+                                should be installed before the daemon
+                                is started up (e.g. sockets set up by
+                                systemd, via socket activation), as
+                                systemd will immediately proceed
+                                starting follow-up units.</para>
 
                                 <para>If set to
                                 <option>forking</option> 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
+                                will call <function>fork()</function>
+                                as part of its start-up. The parent process is
+                                expected to exit 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
                                 exits.</para>
 
                                 <para>Behaviour of
-                                <option>finish</option> is similar
+                                <option>oneshot</option> is similar
                                 to <option>simple</option>, however
                                 it is expected that the process has to
                                 exit before systemd starts follow-up
-                                units. <varname>ValidNoProcess=</varname>
+                                units. <varname>RemainAfterExit=</varname>
                                 is particularly useful for this type
                                 of service.</para>
 
                                 <para>Behaviour of
                                 <option>dbus</option> is similar to
-                                <option>simple</option>, however it
-                                is expected that the daemon acquires a
+                                <option>simple</option>, however it is
+                                expected that the daemon acquires a
                                 name on the D-Bus bus, as configured
                                 by
                                 <varname>BusName=</varname>. systemd
                                 will proceed starting follow-up units
                                 after the D-Bus bus name has been
-                                acquired.</para>
+                                acquired. Service units with this
+                                option configured implicitly gain
+                                dependencies on the
+                                <filename>dbus.socket</filename>
+                                unit. This type is the default if
+                                <varname>BusName=</varname> is
+                                specified.</para>
 
                                 <para>Behaviour of
                                 <option>notify</option> is similar to
                                 starting follow-up units after this
                                 notification message has been sent. If
                                 this option is used
-                                <option>NotifyAccess=</option> (see
-                                below) must be set to open access to
+                                <varname>NotifyAccess=</varname> (see
+                                below) should be set to open access to
                                 the notification socket provided by
-                                systemd.</para>
+                                systemd. If
+                                <varname>NotifyAccess=</varname> is
+                                not set, it will be implicitly set to
+                                <option>main</option>.</para>
+
+                                <para>Behaviour of
+                                <option>idle</option> is very similar
+                                to <option>simple</option>, however
+                                actual execution of a the service
+                                binary is delayed until all jobs are
+                                dispatched. This may be used to avoid
+                                interleaving of output of shell
+                                services with the status output on the
+                                console.</para>
                                 </listitem>
                         </varlistentry>
 
                         <varlistentry>
-                                <term><varname>ValidNoProcess=</varname></term>
+                                <term><varname>RemainAfterExit=</varname></term>
 
                                 <listitem><para>Takes a boolean value
                                 that specifies whether the service
                                 </listitem>
                         </varlistentry>
 
+                        <varlistentry>
+                                <term><varname>GuessMainPID=</varname></term>
+
+                                <listitem><para>Takes a boolean value
+                                that specifies whether systemd should
+                                try to guess the main PID of a service
+                                should if it cannot be determined
+                                reliably. This option is ignored
+                                unless <option>Type=forking</option>
+                                is set and <option>PIDFile=</option>
+                                is unset because for the other types
+                                or with an explicitly configured PID
+                                file the main PID is always known. The
+                                guessing algorithm might come to
+                                incorrect conclusions if a daemon
+                                consists of more than one process. If
+                                the main PID cannot be determined
+                                failure detection and automatic
+                                restarting of a service will not work
+                                reliably. Defaults to
+                                <option>yes</option>.</para>
+                                </listitem>
+                        </varlistentry>
+
                         <varlistentry>
                                 <term><varname>PIDFile=</varname></term>
 
                                 daemon. Use of this option is
                                 recommended for services where
                                 <varname>Type=</varname> is set to
-                                <option>forking</option>.</para>
+                                <option>forking</option>. systemd will
+                                read the PID of the main process of
+                                the daemon after start-up of the
+                                service. systemd will not write to the
+                                file configured here.</para>
                                 </listitem>
                         </varlistentry>
 
                                 arguments for the process. It is
                                 mandatory to set this option for all
                                 services. This option may not be
-                                specified more than once. Optionally,
-                                if the absolute file name is prefixed
-                                with @, the second token will be
-                                passed as argv[0] to the executed
-                                process, followed by the further
-                                arguments specified. Unless
-                                <option>Type=forking</option> is set,
-                                the process started via this command
-                                line will be considered the main
-                                process of the
-                                daemon.</para></listitem>
+                                specified more than once, except when
+                                <varname>Type=oneshot</varname> is
+                                used in which case more than one
+                                <varname>ExecStart=</varname> line is
+                                accepted which are then invoked one by
+                                one, sequentially in the order they
+                                appear in the unit file.</para>
+
+                                <para>Optionally, if the absolute file
+                                name is prefixed with
+                                <literal>@</literal>, the second token
+                                will be passed as
+                                <literal>argv[0]</literal> to the
+                                executed process, followed by the
+                                further arguments specified. If the
+                                first token is prefixed with
+                                <literal>-</literal> an exit code of
+                                the command normally considered a
+                                failure (i.e. non-zero exit status or
+                                abnormal exit due to signal) is ignored
+                                and considered success. If both
+                                <literal>-</literal> and
+                                <literal>@</literal> are used for the
+                                same command the former must precede
+                                the latter. Unless
+                                <varname>Type=forking</varname> is
+                                set, the process started via this
+                                command line will be considered the
+                                main process of the daemon. The
+                                command line accepts % specifiers as
+                                described in
+                                <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
+
+                                <para>On top of that basic environment
+                                variable substitution is
+                                supported. Use
+                                <literal>${FOO}</literal> as part of a
+                                word, or as word of its own on the
+                                command line, in which case it will be
+                                replaced by the value of the
+                                environment variable including all
+                                whitespace it contains, resulting in a
+                                single argument.  Use
+                                <literal>$FOO</literal> as a separate
+                                word on the command line, in which
+                                case it will be replaced by the value
+                                of the environment variable split up
+                                at whitespace, resulting in no or more
+                                arguments. Note that the first
+                                argument (i.e. the program to execute)
+                                may not be a variable, and must be a
+                                literal and absolute path
+                                name.</para></listitem>
                         </varlistentry>
 
                         <varlistentry>
                                 <listitem><para>Additional commands
                                 that are executed before (resp. after)
                                 the command in
-                                <varname>ExecStart=</varname>. If
-                                specified more than once, all commands
-                                are executed one after the other,
-                                serially. Use of these settings is
-                                optional.</para></listitem>
+                                <varname>ExecStart=</varname>. Multiple
+                                command lines may be concatenated in a
+                                single directive, by separating them
+                                by semicolons (these semicolons must
+                                be passed as separate words). In that
+                                case, the commands are executed one
+                                after the other,
+                                serially. Alternatively, these
+                                directives may be specified more than
+                                once with the same effect. However,
+                                the latter syntax is not recommended
+                                for compatibility with parsers
+                                suitable for XDG
+                                <filename>.desktop</filename> files.
+                                Use of these settings is
+                                optional. Specifier and environment
+                                variable substitution is
+                                supported.</para></listitem>
                         </varlistentry>
 
                         <varlistentry>
                                 <term><varname>ExecReload=</varname></term>
                                 <listitem><para>Commands to execute to
                                 trigger a configuration reload in the
-                                service. If used more than once, all
-                                commands are executed one after the
-                                other, serially. Use of this setting is optional.
-                                </para></listitem>
+                                service. This argument takes multiple
+                                command lines, following the same
+                                scheme as pointed out for
+                                <varname>ExecStartPre=</varname>
+                                above. Use of this setting is
+                                optional. Specifier and environment
+                                variable substitution is supported
+                                here following the same scheme as for
+                                <varname>ExecStart=</varname>. One
+                                special environment variable is set:
+                                if known <literal>$MAINPID</literal> is
+                                set to the main process of the
+                                daemon, and may be used for command
+                                lines like the following:
+                                <command>/bin/kill -HUP
+                                $MAINPID</command>.</para></listitem>
                         </varlistentry>
 
                         <varlistentry>
                                 <term><varname>ExecStop=</varname></term>
                                 <listitem><para>Commands to execute to
                                 stop the service started via
-                                <varname>ExecStart=</varname>. If used
-                                more than once, all commands are
-                                executed one after the other,
-                                serially. Use of this setting is
+                                <varname>ExecStart=</varname>. This
+                                argument takes multiple command lines,
+                                following the same scheme as pointed
+                                out for
+                                <varname>ExecStartPre=</varname>
+                                above. Use of this setting is
                                 optional. All processes remaining for
                                 a service after the commands
                                 configured in this option are run are
                                 (see below). If this option is not
                                 specified the process is terminated
                                 right-away when service stop is
-                                requested.</para></listitem>
+                                requested. Specifier and environment
+                                variable substitution is supported
+                                (including
+                                <literal>$MAINPID</literal>, see
+                                above).</para></listitem>
                         </varlistentry>
 
                         <varlistentry>
                                 that are executed after the service
                                 was stopped using the commands
                                 configured in
-                                <varname>ExecStop=</varname>. If
-                                specified more than once, all commands
-                                are executed one after the other,
-                                serially. Use of these settings is
-                                optional.</para></listitem>
+                                <varname>ExecStop=</varname>. This
+                                argument takes multiple command lines,
+                                following the same scheme as pointed
+                                out for
+                                <varname>ExecStartPre</varname>. Use
+                                of these settings is
+                                optional. Specifier and environment
+                                variable substitution is
+                                supported.</para></listitem>
                         </varlistentry>
 
                         <varlistentry>
                                 forcibly via SIGTERM, and after
                                 another delay of this time with
                                 SIGKILL. (See
-                                <option>KilleMode=</option>
+                                <varname>KillMode=</varname>
                                 below.) Takes a unit-less value in seconds, or a
                                 time span value such as "5min
                                 20s". Pass 0 to disable the timeout
                                 logic. Defaults to
-                                60s.</para></listitem>
+                                90s, except when <varname>Type=oneshot</varname> is
+                                used in which case the timeout
+                                is disabled by default.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>WatchdogSec=</varname></term>
+                                <listitem><para>Configures the
+                                watchdog timeout for a service. This
+                                is activated when the start-up is
+                                completed. The service must call
+                                <citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+                                regularly with "WATCHDOG=1" (i.e. the
+                                "keep-alive ping"). If the time
+                                between two such calls is larger than
+                                the configured time then the service
+                                is placed in a failure state. By
+                                setting <varname>Restart=</varname> 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. This allows
+                                daemons to automatically enable the
+                                keep-alive pinging logic if watchdog
+                                support is enabled for the service. 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>
                         </varlistentry>
 
                         <varlistentry>
                                 <term><varname>Restart=</varname></term>
                                 <listitem><para>Configures whether the
-                                main service process shall be restarted when
-                                it exists. Takes one of
-                                <option>once</option>,
-                                <option>restart-on-success</option> or
-                                <option>restart-always</option>. If
-                                set to <option>once</option> (the
-                                default) the service will not be
-                                restarted when it exits. If set to
-                                <option>restart-on-success</option> it
-                                will be restarted only when it exited
-                                cleanly, i.e. terminated with an exit
-                                code of 0. If set to
-                                <option>restart-always</option> the
+                                main service process shall be
+                                restarted when it exits. Takes one of
+                                <option>no</option>,
+                                <option>on-success</option>,
+                                <option>on-failure</option>,
+                                <option>on-abort</option> or
+                                <option>always</option>. If set to
+                                <option>no</option> (the default) the
+                                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
+                                0. If set to
+                                <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, or
+                                whether it exited cleanly or not,
                                 got terminated abnormally by a
-                                signal.</para></listitem>
+                                signal or hit a timeout.</para></listitem>
                         </varlistentry>
 
                         <varlistentry>
                                 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-group</option>,
                                 <option>process</option>,
                                 <option>none</option>.</para>
 
                                 stop command (as configured with
                                 <varname>ExecStop=</varname>) is
                                 executed. If set to
-                                <option>process-group</option> only
-                                the members of the process group of
-                                the main service process are
-                                killed. If set to
                                 <option>process</option> only the main
                                 process itself is killed. If set to
                                 <option>none</option> no process is
                                 group and the control group continues
                                 to exist after stop unless it is
                                 empty. Defaults to
-                                <option>control-croup</option>.</para>
+                                <option>control-group</option>.</para>
 
                                 <para>Processes will first be
-                                terminated via SIGTERM. If then after
-                                a delay (configured via the
-                                <option>TimeoutSec=</option> option)
+                                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. See
+                                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
                                 <option>main</option> or
                                 <option>all</option>. If
                                 <option>none</option> no daemon status
-                                updates are accepted by the service
+                                updates are accepted from the service
                                 processes, all status update messages
                                 are ignored. If <option>main</option>
                                 only service updates sent from the
                                 accepted. If <option>all</option> all
                                 services updates from all members of
                                 the service's control group are
-                                accepted. This option must be set to
+                                accepted. This option should be set to
                                 open access to the notification socket
                                 when using
-                                <varname>Type=notify</varname> (see above).</para></listitem>
+                                <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>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>Compatibility Options</title>
+
+                <para>The following options are also available in the
+                <literal>[Service]</literal> section, but exist purely
+                for compatibility reasons and should not be used in
+                newly written service files.</para>
+
+                <variablelist>
+                        <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>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>
 
                 </variablelist>
         <refsect1>
                   <title>See Also</title>
                   <para>
-                          <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+                          <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>