mirror of
https://github.com/systemd/systemd.git
synced 2024-11-30 13:53:39 +08:00
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.
122 lines
5.9 KiB
XML
122 lines
5.9 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
|
|
|
|
<refentry id="systemd-bless-boot.service" conditional='ENABLE_BOOTLOADER'
|
|
xmlns:xi="http://www.w3.org/2001/XInclude">
|
|
|
|
<refentryinfo>
|
|
<title>systemd-bless-boot.service</title>
|
|
<productname>systemd</productname>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>systemd-bless-boot.service</refentrytitle>
|
|
<manvolnum>8</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>systemd-bless-boot.service</refname>
|
|
<refname>systemd-bless-boot</refname>
|
|
<refpurpose>Mark current boot process as successful</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<para><filename>systemd-bless-boot.service</filename></para>
|
|
<para><filename>/usr/lib/systemd/systemd-bless-boot</filename></para>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><filename>systemd-bless-boot.service</filename> is a system service that marks the current boot process as
|
|
successful. It's automatically pulled into the initial transaction when
|
|
<citerefentry><refentrytitle>systemd-bless-boot-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
detects that <citerefentry><refentrytitle>systemd-boot</refentrytitle><manvolnum>7</manvolnum></citerefentry> style
|
|
boot counting is used.</para>
|
|
|
|
<para>Internally, the service operates based on the <varname>LoaderBootCountPath</varname> EFI variable (of the
|
|
vendor UUID <constant>4a67b082-0a4c-41cf-b6c7-440b29bb8c4</constant>), which is passed from the boot loader to the
|
|
OS. It contains a file system path (relative to the EFI system partition) of the <ulink
|
|
url="https://uapi-group.org/specifications/specs/boot_loader_specification">Boot Loader Specification</ulink> compliant boot loader entry
|
|
file or unified kernel image file that was used to boot up the
|
|
system. <command>systemd-bless-boot.service</command> removes the two 'tries done' and 'tries left' numeric boot
|
|
counters from the filename, which indicates to future invocations of the boot loader that the entry has completed
|
|
booting successfully at least once. (This service will hence rename the boot loader entry file or unified kernel
|
|
image file on the first successful boot.)</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Options</title>
|
|
|
|
<para>The <filename>/usr/lib/systemd/systemd-bless-boot</filename> executable may also be invoked from the
|
|
command line, taking one of the following command arguments:</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><option>status</option></term>
|
|
|
|
<listitem><para>The current status of the boot loader entry file or unified kernel image file is shown. This
|
|
outputs one of <literal>good</literal>, <literal>bad</literal>, <literal>indeterminate</literal>,
|
|
<literal>clean</literal>, depending on the state and previous invocations of the command. The string
|
|
<literal>indeterminate</literal> is shown initially after boot, before it has been marked as "good" or
|
|
"bad". The string <literal>good</literal> is shown after the boot was marked as "good" with the
|
|
<option>good</option> command below, and "bad" conversely after the <option>bad</option> command was
|
|
invoked. The string <literal>clean</literal> is returned when boot counting is currently not in effect.</para>
|
|
|
|
<para>This command is implied if no command argument is specified.</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v240"/></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>good</option></term>
|
|
|
|
<listitem><para>When invoked, the current boot loader entry file or unified kernel image file will be marked as
|
|
"good", executing the file rename operation described above. This command is intended to be invoked at the end
|
|
of a successful boot. The <filename>systemd-bless-boot.service</filename> unit invokes this
|
|
command.</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v240"/></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>bad</option></term>
|
|
|
|
<listitem><para>When called the 'tries left' counter in the boot loader entry file name or unified kernel image
|
|
file name is set to zero, marking the boot loader entry or kernel image as "bad", so that the boot loader won't
|
|
consider it anymore on future boots (at least as long as there are other entries available that are not marked
|
|
"bad" yet). This command is normally not executed, but can be used to instantly put an end to the boot counting
|
|
logic if a problem is detected and persistently mark the boot entry as bad.</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v240"/></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>indeterminate</option></term>
|
|
|
|
<listitem><para>This command undoes any marking of the current boot loader entry file or unified kernel image
|
|
file as good or bad. This is implemented by renaming the boot loader entry file or unified kernel image file
|
|
back to the path encoded in the <varname>LoaderBootCountPath</varname> EFI variable.</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v240"/></listitem>
|
|
</varlistentry>
|
|
|
|
<xi:include href="standard-options.xml" xpointer="help" />
|
|
<xi:include href="standard-options.xml" xpointer="version" />
|
|
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd-boot</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|