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man: document that RemainAfterElapse=no means that also the triggered unit needs to deactivate

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Fixes: #16378
This commit is contained in:
Lennart Poettering 2020-09-10 19:08:45 +02:00 committed by Zbigniew Jędrzejewski-Szmek
parent 4b6bc95c01
commit 415f8a5bfe
1 changed files with 8 additions and 12 deletions
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20
man/systemd.timer.xml
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@ -335,18 +335,14 @@
<varlistentry>
<term><varname>RemainAfterElapse=</varname></term>
<listitem><para>Takes a boolean argument. If true, an elapsed
timer will stay loaded, and its state remains queryable. If
false, an elapsed timer unit that cannot elapse anymore is
unloaded. Turning this off is particularly useful for
transient timer units that shall disappear after they first
elapse. Note that this setting has an effect on repeatedly
starting a timer unit that only elapses once: if
<varname>RemainAfterElapse=</varname> is on, it will not be
started again, and is guaranteed to elapse only once. However,
if <varname>RemainAfterElapse=</varname> is off, it might be
started again if it is already elapsed, and thus be triggered
multiple times. Defaults to
<listitem><para>Takes a boolean argument. If true, a timer will stay loaded, and its state remains
queryable even after it elapsed and the associated unit (as configured with <varname>Unit=</varname>,
see above) deactivated again. If false, an elapsed timer unit that cannot elapse anymore is unloaded
once its associated unit deactivated again. Turning this off is particularly useful for transient
timer units. Note that this setting has an effect when repeatedly starting a timer unit: if
<varname>RemainAfterElapse=</varname> is on, starting the timer a second time has no effect. However,
if <varname>RemainAfterElapse=</varname> is off and the timer unit was already unloaded, it can be
started again, and thus the service can be triggered multiple times. Defaults to
<varname>yes</varname>.</para></listitem>
</varlistentry>
</variablelist>