chiark / gitweb /
cryptsetup-generator: Add support for naming luks devices on kernel cmdline
[elogind.git] / man / systemd.timer.xml
index bb3a6d138650d18e262a716ed284c7bb8db17802..55b458557f357634ae7f27591cbd8cddf7001e30 100644 (file)
                 <varname>Unit=</varname> (see below).</para>
 
                 <para>Unless <varname>DefaultDependencies=</varname>
-                is set to <option>false</option>, timer units will
+                is set to <option>false</option>, all timer units will
                 implicitly have dependencies of type
                 <varname>Conflicts=</varname> and
                 <varname>Before=</varname> on
-                <filename>shutdown.target</filename>. These ensure
-                that timer units are stopped cleanly prior to system
-                shutdown. Only timer units involved with early boot or
-                late system shutdown should disable this
-                option.</para>
+                <filename>shutdown.target</filename> to ensure that
+                they are stopped cleanly prior to system shutdown.
+                Timer units with at least one
+                <varname>OnCalendar=</varname> directive will have an
+                additional <varname>After=</varname> dependency on
+                <filename>timer-sync.target</filename> to avoid
+                being started before the system clock has been
+                correctly set. Only timer units involved with early
+                boot or late system shutdown should disable the
+                <varname>DefaultDependencies=</varname> option.</para>
         </refsect1>
 
         <refsect1>
                                 later. Within this time window, the
                                 expiry time will be placed at a
                                 host-specific, randomized but stable
-                                position, that is synchronized between
+                                position that is synchronized between
                                 all local timer units. This is done in
                                 order to distribute the wake-up time
                                 in networked installations, as well as
                                 are named identically, except for the
                                 suffix.</para></listitem>
                         </varlistentry>
+
+
+                        <varlistentry>
+                                <term><varname>Persistent=</varname></term>
+
+                                <listitem><para>Takes a boolean
+                                argument. If true, the time when the
+                                service unit was last triggered is
+                                stored on disk. When the timer is
+                                activated, the service unit is
+                                triggered immediately if it would have
+                                been triggered at least once during
+                                the time when the timer was inactive.
+                                This is useful to catch up on missed
+                                runs of the service when the machine
+                                was off. Note that this setting only
+                                has an effect on timers configured
+                                with <varname>OnCalendar=</varname>.
+                                </para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>WakeSystem=</varname></term>
+
+                                <listitem><para>Takes a boolean
+                                argument. If true, an elapsing timer
+                                will cause the system to resume from
+                                suspend, should it be suspended and if
+                                the system supports this. Note that
+                                this option will only make sure the
+                                system resumes on the appropriate
+                                times, it will not take care of
+                                suspending it again after any work
+                                that is to be done is
+                                finished. Defaults to
+                                <varname>false</varname>.</para></listitem>
+                        </varlistentry>
                 </variablelist>
         </refsect1>
 
                   <title>See Also</title>
                   <para>
                           <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
-                          <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+                          <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>7</manvolnum></citerefentry>,