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78266a54f1
Most of our kernel cmdline options use underscores as word separators in kernel cmdline options, but there were some exceptions. Let's fix those, and also use underscores. Since our /proc/cmdline parsers don't distinguish between the two characters anyway this should not break anything, but makes sure our own codebase (and in particular docs and log messages) are internally consistent.
92 lines
3.1 KiB
XML
92 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/4.5/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>This service checks the presence of an external power supply and the battery level during the early
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boot stage to determine whether there is sufficient power to carry on with the booting process.</para>
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<para><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.</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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