mirror of
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11a1589223
Files which are installed as-is (any .service and other unit files, .conf files, .policy files, etc), are left as is. My assumption is that SPDX identifiers are not yet that well known, so it's better to retain the extended header to avoid any doubt. I also kept any copyright lines. We can probably remove them, but it'd nice to obtain explicit acks from all involved authors before doing that.
186 lines
7.8 KiB
XML
186 lines
7.8 KiB
XML
<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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SPDX-License-Identifier: LGPL-2.1+
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This file is part of systemd.
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Copyright 2013 Harald Hoyer
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-->
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<refentry id="kernel-install">
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<refentryinfo>
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<title>kernel-install</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Harald</firstname>
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<surname>Hoyer</surname>
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<email>harald@redhat.com</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>kernel-install</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>kernel-install</refname>
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<refpurpose>Add and remove kernel and initramfs images to and from /boot</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>kernel-install</command>
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<arg choice="plain">COMMAND</arg>
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<arg choice="plain"><replaceable>KERNEL-VERSION</replaceable></arg>
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<arg choice="opt"><replaceable>KERNEL-IMAGE</replaceable></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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<command>kernel-install</command> is used to install and remove kernel and
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initramfs images to and from <filename>/boot</filename>.
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</para>
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<para><command>kernel-install</command> will execute the files
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located in the directory <filename>/usr/lib/kernel/install.d/</filename>
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and the local administration directory <filename>/etc/kernel/install.d/</filename>.
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All files are collectively sorted and executed in lexical order, regardless of the directory in
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which they live. However, files with identical filenames replace each other.
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Files in <filename>/etc/kernel/install.d/</filename> take precedence over files with the same name
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in <filename>/usr/lib/kernel/install.d/</filename>. This can be used to override a system-supplied
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executables with a local file if needed; a symbolic link in <filename>/etc/kernel/install.d/</filename>
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with the same name as an executable in <filename>/usr/lib/kernel/install.d/</filename>,
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pointing to <filename>/dev/null</filename>, disables the executable entirely. Executables must have the
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extension <literal>.install</literal>; other extensions are ignored.</para>
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<para>An executable should return <constant>0</constant> on success. It may also
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return <constant>77</constant> to cause the whole operation to terminate
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(executables later in lexical order will be skipped).</para>
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</refsect1>
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<refsect1>
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<title>Commands</title>
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<para>The following commands are understood:</para>
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<variablelist>
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<varlistentry>
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<term><command>add <replaceable>KERNEL-VERSION</replaceable> <replaceable>KERNEL-IMAGE</replaceable></command></term>
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<listitem>
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<para><command>kernel-install</command> creates the directory
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<filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename>
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and calls executables from
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<filename>/usr/lib/kernel/install.d/*.install</filename> and
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<filename>/etc/kernel/install.d/*.install</filename> with
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the arguments
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<programlisting>add <replaceable>KERNEL-VERSION</replaceable> \
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<filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename> <replaceable>KERNEL-IMAGE</replaceable></programlisting>
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</para>
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<para>The kernel-install plugin <filename>50-depmod.install</filename> runs depmod for the <replaceable>KERNEL-VERSION</replaceable>.</para>
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<para>The kernel-install plugin
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<filename>90-loaderentry.install</filename> copies
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<replaceable>KERNEL-IMAGE</replaceable> to
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<filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/linux</filename>.
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It also creates a boot loader entry according to the boot
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loader specification in
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<filename>/boot/loader/entries/<replaceable>MACHINE-ID</replaceable>-<replaceable>KERNEL-VERSION</replaceable>.conf</filename>.
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The title of the entry is the
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<replaceable>PRETTY_NAME</replaceable> parameter specified
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in <filename>/etc/os-release</filename> or
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<filename>/usr/lib/os-release</filename> (if the former is
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missing), or "Linux
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<replaceable>KERNEL-VERSION</replaceable>", if unset. If
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the file <filename>initrd</filename> is found next to the
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<filename>linux</filename> file, the initrd will be added to
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the configuration.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><command>remove <replaceable>KERNEL-VERSION</replaceable></command></term>
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<listitem>
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<para>Calls executables from <filename>/usr/lib/kernel/install.d/*.install</filename>
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and <filename>/etc/kernel/install.d/*.install</filename> with the arguments
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<programlisting>remove <replaceable>KERNEL-VERSION</replaceable> <filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename></programlisting>
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</para>
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<para><command>kernel-install</command> removes the entire directory
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<filename>/boot/<replaceable>MACHINE-ID</replaceable>/<replaceable>KERNEL-VERSION</replaceable>/</filename> afterwards.</para>
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<para>The kernel-install plugin <filename>90-loaderentry.install</filename> removes the file
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<filename>/boot/loader/entries/<replaceable>MACHINE-ID</replaceable>-<replaceable>KERNEL-VERSION</replaceable>.conf</filename>.</para>
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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>Exit status</title>
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<para>If every executable returns 0 or 77, 0 is returned, and a non-zero failure code otherwise.</para>
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</refsect1>
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<refsect1>
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<title>Files</title>
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<variablelist>
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<varlistentry>
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<term>
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<filename>/usr/lib/kernel/install.d/*.install</filename>
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<filename>/etc/kernel/install.d/*.install</filename>
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</term>
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<listitem>
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<para>Drop-in files which are executed by kernel-install.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<filename>/etc/kernel/cmdline</filename>
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<filename>/proc/cmdline</filename>
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</term>
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<listitem>
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<para>The content of the file <filename>/etc/kernel/cmdline</filename> specifies the kernel command line to use.
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If that file does not exist, <filename>/proc/cmdline</filename> is used.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<filename>/etc/machine-id</filename>
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</term>
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<listitem>
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<para>The content of the file specifies the machine identification <replaceable>MACHINE-ID</replaceable>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<filename>/etc/os-release</filename>
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<filename>/usr/lib/os-release</filename>
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</term>
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<listitem>
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<para>The content of the file specifies the operating system title <replaceable>PRETTY_NAME</replaceable>.</para>
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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>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<ulink url="https://www.freedesktop.org/wiki/Specifications/BootLoaderSpec">Boot loader specification</ulink>
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</para>
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</refsect1>
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</refentry>
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