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man: rework systemd-run man page a bit

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Lennart Poettering 2015-08-21 16:04:16 +02:00
parent ef7051360a
commit dec896f851
1 changed files with 29 additions and 26 deletions
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55
man/systemd-run.xml
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@ -69,38 +69,41 @@
<title>Description</title>
<para><command>systemd-run</command> may be used to create and
start a transient <filename>.service</filename> or a transient
<filename>.timer</filename> or a <filename>.scope</filename> unit
and run the specified <replaceable>COMMAND</replaceable> in
it.</para>
start a transient <filename>.service</filename> or
<filename>.scope</filename> unit and run the specified
<replaceable>COMMAND</replaceable> in it. It may also be used to
create and start transient <filename>.timer</filename>
units.</para>
<para>If a command is run as transient service unit, it will be
started and managed by the service manager like any other service,
and thus show up in the output of <command>systemctl
and thus shows up in the output of <command>systemctl
list-units</command> like any other unit. It will run in a clean
and detached execution environment. <command>systemd-run</command>
will start the service asynchronously in the background and
immediately return.</para>
<para>If a command is run with timer options, transient timer unit
also be created with transient service unit. But the transient
timer unit is only started immediately. The transient service unit
will be started when the transient timer is elapsed. If
<option>--unit=</option> is specified with timer options, the
<replaceable>COMMAND</replaceable> can be omitted. In this case,
<command>systemd-run</command> assumes service unit is already
loaded and creates transient timer unit only. To successfully
create timer unit, already loaded service unit should be specified
with <option>--unit=</option>. This transient timer unit can
activate the existing service unit like any other timer.</para>
and detached execution environment, with the service manager as
its parent process. In this mode <command>systemd-run</command>
will start the service asynchronously in the background and return
after the command has begun execution.</para>
<para>If a command is run as transient scope unit, it will be
started directly by <command>systemd-run</command> and thus
inherit the execution environment of the caller. It is however
managed by the service manager similar to normal services, and
will also show up in the output of <command>systemctl
list-units</command>. Execution in this case is synchronous, and
execution will return only when the command finishes.</para>
started by <command>systemd-run</command> itself as parent process
and will thus inherit the execution environment of the
caller. However, the processes of the command are managed by the
service manager similar to normal services, and will show up in
the output of <command>systemctl list-units</command>. Execution
in this case is synchronous, and will return only when the command
finishes. This mode is enabled via the <option>--scope</option>
switch (see below). </para>
<para>If a command is run with timer options such as
<option>--on-calendar=</option> (see below), a transient timer
unit is created alongside the service unit for the specified
command. Only the transient timer unit is started immediately, the
transient service unit will be started when the transient timer
elapses. If the <option>--unit=</option> is specified, the
<replaceable>COMMAND</replaceable> may be omitted. In this case,
<command>systemd-run</command> only creates a
<filename>.timer</filename> unit that invokes the specified unit
when elapsing.</para>
</refsect1>
<refsect1>