mirror of
https://github.com/systemd/systemd
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ec07c3c80b
This tries to add information about when each option was added. It goes back to version 183. The version info is included from a separate file to allow generating it, which would allow more control on the formatting of the final output.
95 lines
3.1 KiB
XML
95 lines
3.1 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
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<refentry id="systemd-battery-check.service" xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>systemd-battery-check</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd-battery-check.service</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-battery-check.service</refname>
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<refname>systemd-battery-check</refname>
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<refpurpose>Check battery level whether there's enough charge, and power off if not.</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>systemd-battery-check.service</filename></para>
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<cmdsynopsis>
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<command>/usr/lib/systemd/systemd-battery-check</command>
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<arg choice="opt" rep="repeat">OPTIONS</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>
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<filename>systemd-battery-check.service</filename> is used to check the battery level during the early
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boot stage to determine whether there's sufficient battery power to carry on with the booting process.
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</para>
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<para>
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<command>systemd-battery-check</command> returns success if the device is connected to an AC power
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source or if the battery charge is greater than 5%. It returns failure otherwise.
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</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<para>The following options are understood by <command>systemd-battery-check</command>:</para>
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<variablelist>
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<xi:include href="standard-options.xml" xpointer="help" />
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<xi:include href="standard-options.xml" xpointer="version" />
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Exit status</title>
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<para>
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On success (running on AC power or battery capacity greater than 5%), 0 is returned, a non-zero failure
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code otherwise.
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</para>
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</refsect1>
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<refsect1>
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<title>Kernel Command Line</title>
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<para>The following variables are understood:</para>
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<variablelist class='kernel-commandline-options'>
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<varlistentry>
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<term><varname>systemd.battery-check=<replaceable>BOOL</replaceable></varname></term>
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<listitem>
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<para>Takes a boolean. If specified with false, <command>systemd-battery-check</command> command
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will return immediately with exit status 0 without checking battery capacity and AC power
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existence, and the service <filename>systemd-battery-check.service</filename> will succeed. This
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may be useful when the command wrongly detects and reports battery capacity percentage or AC power
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existence, or when you want to boot the system forcibly.</para>
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<xi:include href="version-info.xml" xpointer="v254"/>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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