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author | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2015-02-03 21:14:13 -0500 |
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committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2015-02-03 23:11:35 -0500 |
commit | 798d3a524ea57aaf40cb53858aaa45ec702f012d (patch) | |
tree | f9251ab7878a180d464780d514f3ea8d4599fe6e /man/systemd.timer.xml | |
parent | 35888b67f77fa7a5cae0973403cb97aa30cad70c (diff) |
Reindent man pages to 2ch
Diffstat (limited to 'man/systemd.timer.xml')
-rw-r--r-- | man/systemd.timer.xml | 513 |
1 files changed, 228 insertions, 285 deletions
diff --git a/man/systemd.timer.xml b/man/systemd.timer.xml index 55b458557f..317fbf1f2f 100644 --- a/man/systemd.timer.xml +++ b/man/systemd.timer.xml @@ -1,7 +1,7 @@ <?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"> + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> <!-- This file is part of systemd. @@ -23,289 +23,232 @@ --> <refentry id="systemd.timer"> - <refentryinfo> - <title>systemd.timer</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.timer</refentrytitle> - <manvolnum>5</manvolnum> - </refmeta> - - <refnamediv> - <refname>systemd.timer</refname> - <refpurpose>Timer unit configuration</refpurpose> - </refnamediv> - - <refsynopsisdiv> - <para><filename><replaceable>timer</replaceable>.timer</filename></para> - </refsynopsisdiv> - - <refsect1> - <title>Description</title> - - <para>A unit configuration file whose name ends in - <literal>.timer</literal> encodes information about - a timer controlled and supervised by systemd, for - timer-based activation.</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 - timer specific configuration options are configured in - the [Timer] section.</para> - - <para>For each timer file, a matching unit file must - exist, describing the unit to activate when the timer - elapses. By default, a service by the same name as the - timer (except for the suffix) is activated. Example: a - timer file <filename>foo.timer</filename> activates a - matching service <filename>foo.service</filename>. The - unit to activate may be controlled by - <varname>Unit=</varname> (see below).</para> - - <para>Unless <varname>DefaultDependencies=</varname> - 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> 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> - <title>Options</title> - - <para>Timer files must include a [Timer] section, - which carries information about the timer it - defines. The options specific to the [Timer] section - of timer units are the following:</para> - - <variablelist class='unit-directives'> - <varlistentry> - <term><varname>OnActiveSec=</varname></term> - <term><varname>OnBootSec=</varname></term> - <term><varname>OnStartupSec=</varname></term> - <term><varname>OnUnitActiveSec=</varname></term> - <term><varname>OnUnitInactiveSec=</varname></term> - - <listitem><para>Defines monotonic timers - relative to different starting points: - <varname>OnActiveSec=</varname> defines a - timer relative to the moment the timer - itself is - activated. <varname>OnBootSec=</varname> - defines a timer relative to when the - machine was booted - up. <varname>OnStartupSec=</varname> - defines a timer relative to when - systemd was first - started. <varname>OnUnitActiveSec=</varname> - defines a timer relative to when the - unit the timer is activating was last - activated. <varname>OnUnitInactiveSec=</varname> - defines a timer relative to when the - unit the timer is activating was last - deactivated.</para> - - <para>Multiple directives may be - combined of the same and of different - types. For example, by combining - <varname>OnBootSec=</varname> and - <varname>OnUnitActiveSec=</varname>, it is - possible to define a timer that - elapses in regular intervals and - activates a specific service each - time.</para> - - <para>The arguments to the directives - are time spans configured in - seconds. Example: "OnBootSec=50" means - 50s after boot-up. The argument may - also include time units. Example: - "OnBootSec=5h 30min" means 5 hours and - 30 minutes after boot-up. For details - about the syntax of time spans, see - <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> - - <para>If a timer configured with - <varname>OnBootSec=</varname> or - <varname>OnStartupSec=</varname> is - already in the past when the timer - unit is activated, it will immediately - elapse and the configured unit is - started. This is not the case for - timers defined in the other - directives.</para> - - <para>These are monotonic timers, - independent of wall-clock time and timezones. If the - computer is temporarily suspended, the - monotonic clock stops too.</para> - - <para>If the empty string is assigned - to any of these options, the list of - timers is reset, and all prior - assignments will have no - effect.</para> - - <para>Note that timers do not - necessarily expire at the precise - time configured with these settings, - as they are subject to the - <varname>AccuracySec=</varname> - setting below.</para></listitem> - - </varlistentry> - - <varlistentry> - <term><varname>OnCalendar=</varname></term> - - <listitem><para>Defines realtime - (i.e. wallclock) timers with calendar - event expressions. See - <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>7</manvolnum></citerefentry> - for more information on the syntax of - calendar event expressions. Otherwise, - the semantics are similar to - <varname>OnActiveSec=</varname> and - related settings.</para> - - <para>Note that timers do not - necessarily expire at the precise - time configured with this setting, - as it is subject to the - <varname>AccuracySec=</varname> - setting below.</para></listitem> - </varlistentry> - - <varlistentry> - <term><varname>AccuracySec=</varname></term> - - <listitem><para>Specify the accuracy - the timer shall elapse with. Defaults - to 1min. The timer is scheduled to - elapse within a time window starting - with the time specified in - <varname>OnCalendar=</varname>, - <varname>OnActiveSec=</varname>, - <varname>OnBootSec=</varname>, - <varname>OnStartupSec=</varname>, - <varname>OnUnitActiveSec=</varname> or - <varname>OnUnitInactiveSec=</varname> - and ending the time configured with - <varname>AccuracySec=</varname> - later. Within this time window, the - expiry time will be placed at a - host-specific, randomized but stable - 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 - optimizing power consumption to - suppress unnecessary CPU wake-ups. To - get best accuracy, set this option to - 1us. Note that the timer is still - subject to the timer slack configured - via - <citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>'s - <varname>TimerSlackNSec=</varname> - setting. See - <citerefentry><refentrytitle>prctl</refentrytitle><manvolnum>2</manvolnum></citerefentry> - for details. To optimize power - consumption, make sure to set this - value as high as possible and as low - as necessary.</para></listitem> - </varlistentry> - <varlistentry> - <term><varname>Unit=</varname></term> - - <listitem><para>The unit to activate - when this timer elapses. The argument is a - unit name, whose suffix is not - <literal>.timer</literal>. If not - specified, this value defaults to a - service that has the same name as the - timer unit, except for the - suffix. (See above.) It is recommended - that the unit name that is activated - and the unit name of the timer unit - 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> - - <refsect1> - <title>See Also</title> - <para> - <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</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>, - <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>, - <citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>, - <citerefentry><refentrytitle>prctl</refentrytitle><manvolnum>2</manvolnum></citerefentry> - </para> - </refsect1> + <refentryinfo> + <title>systemd.timer</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.timer</refentrytitle> + <manvolnum>5</manvolnum> + </refmeta> + + <refnamediv> + <refname>systemd.timer</refname> + <refpurpose>Timer unit configuration</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <para><filename><replaceable>timer</replaceable>.timer</filename></para> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para>A unit configuration file whose name ends in + <literal>.timer</literal> encodes information about a timer + controlled and supervised by systemd, for timer-based + activation.</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 timer specific configuration options are + configured in the [Timer] section.</para> + + <para>For each timer file, a matching unit file must exist, + describing the unit to activate when the timer elapses. By + default, a service by the same name as the timer (except for the + suffix) is activated. Example: a timer file + <filename>foo.timer</filename> activates a matching service + <filename>foo.service</filename>. The unit to activate may be + controlled by <varname>Unit=</varname> (see below).</para> + + <para>Unless <varname>DefaultDependencies=</varname> 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> + 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> + <title>Options</title> + + <para>Timer files must include a [Timer] section, which carries + information about the timer it defines. The options specific to + the [Timer] section of timer units are the following:</para> + + <variablelist class='unit-directives'> + <varlistentry> + <term><varname>OnActiveSec=</varname></term> + <term><varname>OnBootSec=</varname></term> + <term><varname>OnStartupSec=</varname></term> + <term><varname>OnUnitActiveSec=</varname></term> + <term><varname>OnUnitInactiveSec=</varname></term> + + <listitem><para>Defines monotonic timers relative to different + starting points: <varname>OnActiveSec=</varname> defines a + timer relative to the moment the timer itself is activated. + <varname>OnBootSec=</varname> defines a timer relative to when + the machine was booted up. <varname>OnStartupSec=</varname> + defines a timer relative to when systemd was first started. + <varname>OnUnitActiveSec=</varname> defines a timer relative + to when the unit the timer is activating was last activated. + <varname>OnUnitInactiveSec=</varname> defines a timer relative + to when the unit the timer is activating was last + deactivated.</para> + + <para>Multiple directives may be combined of the same and of + different types. For example, by combining + <varname>OnBootSec=</varname> and + <varname>OnUnitActiveSec=</varname>, it is possible to define + a timer that elapses in regular intervals and activates a + specific service each time.</para> + + <para>The arguments to the directives are time spans + configured in seconds. Example: "OnBootSec=50" means 50s after + boot-up. The argument may also include time units. Example: + "OnBootSec=5h 30min" means 5 hours and 30 minutes after + boot-up. For details about the syntax of time spans, see + <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para> + + <para>If a timer configured with <varname>OnBootSec=</varname> + or <varname>OnStartupSec=</varname> is already in the past + when the timer unit is activated, it will immediately elapse + and the configured unit is started. This is not the case for + timers defined in the other directives.</para> + + <para>These are monotonic timers, independent of wall-clock + time and timezones. If the computer is temporarily suspended, + the monotonic clock stops too.</para> + + <para>If the empty string is assigned to any of these options, + the list of timers is reset, and all prior assignments will + have no effect.</para> + + <para>Note that timers do not necessarily expire at the + precise time configured with these settings, as they are + subject to the <varname>AccuracySec=</varname> setting + below.</para></listitem> + + </varlistentry> + + <varlistentry> + <term><varname>OnCalendar=</varname></term> + + <listitem><para>Defines realtime (i.e. wallclock) timers with + calendar event expressions. See + <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>7</manvolnum></citerefentry> + for more information on the syntax of calendar event + expressions. Otherwise, the semantics are similar to + <varname>OnActiveSec=</varname> and related settings.</para> + + <para>Note that timers do not necessarily expire at the + precise time configured with this setting, as it is subject to + the <varname>AccuracySec=</varname> setting + below.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>AccuracySec=</varname></term> + + <listitem><para>Specify the accuracy the timer shall elapse + with. Defaults to 1min. The timer is scheduled to elapse + within a time window starting with the time specified in + <varname>OnCalendar=</varname>, + <varname>OnActiveSec=</varname>, + <varname>OnBootSec=</varname>, + <varname>OnStartupSec=</varname>, + <varname>OnUnitActiveSec=</varname> or + <varname>OnUnitInactiveSec=</varname> and ending the time + configured with <varname>AccuracySec=</varname> later. Within + this time window, the expiry time will be placed at a + host-specific, randomized but stable 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 optimizing power consumption to + suppress unnecessary CPU wake-ups. To get best accuracy, set + this option to 1us. Note that the timer is still subject to + the timer slack configured via + <citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>'s + <varname>TimerSlackNSec=</varname> setting. See + <citerefentry><refentrytitle>prctl</refentrytitle><manvolnum>2</manvolnum></citerefentry> + for details. To optimize power consumption, make sure to set + this value as high as possible and as low as + necessary.</para></listitem> + </varlistentry> + <varlistentry> + <term><varname>Unit=</varname></term> + + <listitem><para>The unit to activate when this timer elapses. + The argument is a unit name, whose suffix is not + <literal>.timer</literal>. If not specified, this value + defaults to a service that has the same name as the timer + unit, except for the suffix. (See above.) It is recommended + that the unit name that is activated and the unit name of the + timer unit 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> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</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>, + <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>, + <citerefentry><refentrytitle>prctl</refentrytitle><manvolnum>2</manvolnum></citerefentry> + </para> + </refsect1> </refentry> |