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systemd-stable/man/standard-specifiers.xml

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man: document new specifiers
2020-04-28 23:50:50 +03:00
<?xml version="1.0"?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
license: LGPL-2.1+ -> LGPL-2.1-or-later
2020-11-09 07:23:58 +03:00
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
man: document new specifiers
2020-04-28 23:50:50 +03:00
<tbody>
<row id='a'>
<entry><literal>%a</literal></entry>
<entry>Architecture</entry>
<entry>A short string identifying the architecture of the local system. A string such as <constant>x86</constant>, <constant>x86-64</constant> or <constant>arm64</constant>. See the architectures defined for <varname>ConditionArchitecture=</varname> in <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> for a full list.</entry>
</row>
shared: add new IMAGE_VERSION=/IMAGE_ID= field to /etc/os-release This specifes two new optional fields for /etc/os-release: IMAGE_VERSION= and IMAGE_ID= that are supposed to identify the image of the current booted system by name and version. This is inspired by the versioning stuff in https://github.com/systemd/mkosi/pull/683. In environments where pre-built images are installed and updated as a whole the existing os-release version/distro identifier are not sufficient to describe the system's version, as they describe only the distro an image is built from, but not the image itself, even if that image is deployed many times on many systems, and even if that image contains more resources than just the RPMs/DEBs. In particular, "mkosi" is a tool for building disk images based on distro RPMs with additional resources dropped in. The combination of all of these together with their versions should also carry an identifier and version, and that's what IMAGE_VERSION= and IMAGE_ID= is supposed to be.
2021-03-23 18:10:31 +03:00
<row id='A'>
<entry><literal>%A</literal></entry>
<entry>Operating system image version</entry>
<entry>The operating system image version identifier of the running system, as read from the <varname>IMAGE_VERSION=</varname> field of <filename>/etc/os-release</filename>. If not set, resolves to an empty string. See <citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry> for more information.</entry>
</row>
<row id='b'>
<entry><literal>%b</literal></entry>
<entry>Boot ID</entry>
<entry>The boot ID of the running system, formatted as string. See <citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry> for more information.</entry>
</row>
man: document new specifiers
2020-04-28 23:50:50 +03:00
<row id='B'>
<entry><literal>%B</literal></entry>
<entry>Operating system build ID</entry>
<entry>The operating system build identifier of the running system, as read from the <varname>BUILD_ID=</varname> field of <filename>/etc/os-release</filename>. If not set, resolves to an empty string. See <citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry> for more information.</entry>
</row>
man: migrate more specifier explanations to standard-specifiers.xml We probably can migrate even more, but for now let's just migrate those which have the 1:1 identical text everywhere. (Also, let's add the % entry to all specifier tables)
2020-04-30 13:26:11 +03:00
<row id='H'>
<entry><literal>%H</literal></entry>
<entry>Host name</entry>
<entry>The hostname of the running system.</entry>
</row>
Add %l as specifier for the hostname without any domain component As described in #15603, it is a fairly common setup to use a fqdn as the configured hostname. But it is often convenient to use just the actual hostname, i.e. until the first dot. This adds support in tmpfiles, sysusers, and unit files for %l which expands to that. Fixes #15603.
2020-05-07 17:16:19 +03:00
<row id='l'>
<entry><literal>%l</literal></entry>
<entry>Short host name</entry>
<entry>The hostname of the running system, truncated at the first dot to remove any domain component.</entry>
</row>
man: migrate more specifier explanations to standard-specifiers.xml We probably can migrate even more, but for now let's just migrate those which have the 1:1 identical text everywhere. (Also, let's add the % entry to all specifier tables)
2020-04-30 13:26:11 +03:00
<row id='m'>
<entry><literal>%m</literal></entry>
<entry>Machine ID</entry>
<entry>The machine ID of the running system, formatted as string. See <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry> for more information.</entry>
</row>
shared: add new IMAGE_VERSION=/IMAGE_ID= field to /etc/os-release This specifes two new optional fields for /etc/os-release: IMAGE_VERSION= and IMAGE_ID= that are supposed to identify the image of the current booted system by name and version. This is inspired by the versioning stuff in https://github.com/systemd/mkosi/pull/683. In environments where pre-built images are installed and updated as a whole the existing os-release version/distro identifier are not sufficient to describe the system's version, as they describe only the distro an image is built from, but not the image itself, even if that image is deployed many times on many systems, and even if that image contains more resources than just the RPMs/DEBs. In particular, "mkosi" is a tool for building disk images based on distro RPMs with additional resources dropped in. The combination of all of these together with their versions should also carry an identifier and version, and that's what IMAGE_VERSION= and IMAGE_ID= is supposed to be.
2021-03-23 18:10:31 +03:00
<row id='M'>
<entry><literal>%M</literal></entry>
<entry>Operating system image identifier</entry>
<entry>The operating system image identifier of the running system, as read from the <varname>IMAGE_ID=</varname> field of <filename>/etc/os-release</filename>. If not set, resolves to an empty string. See <citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry> for more information.</entry>
</row>
man: document new specifiers
2020-04-28 23:50:50 +03:00
<row id='o'>
<entry><literal>%o</literal></entry>
<entry>Operating system ID</entry>
<entry>The operating system identifier of the running system, as read from the <varname>ID=</varname> field of <filename>/etc/os-release</filename>. See <citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry> for more information.</entry>
</row>
man: add note that %T/%V don't have the trailing slash
2020-10-05 19:33:10 +03:00
<row id='T'>
<entry><literal>%T</literal></entry>
<entry>Directory for temporary files</entry>
<entry>This is either <filename>/tmp<!-- no / --></filename> or the path <literal>$TMPDIR</literal>, <literal>$TEMP</literal> or <literal>$TMP</literal> are set to. (Note that the directory may be specified without a trailing slash.)</entry>
</row>
man: migrate more specifier explanations to standard-specifiers.xml We probably can migrate even more, but for now let's just migrate those which have the 1:1 identical text everywhere. (Also, let's add the % entry to all specifier tables)
2020-04-30 13:26:11 +03:00
<row id='v'>
<entry><literal>%v</literal></entry>
<entry>Kernel release</entry>
<entry>Identical to <command>uname -r</command> output.</entry>
</row>
man: add note that %T/%V don't have the trailing slash
2020-10-05 19:33:10 +03:00
<row id='V'>
<entry><literal>%V</literal></entry>
<entry>Directory for larger and persistent temporary files</entry>
<entry>This is either <filename>/var/tmp<!-- no / --></filename> or the path <literal>$TMPDIR</literal>, <literal>$TEMP</literal> or <literal>$TMP</literal> are set to. (Note that the directory may be specified without a trailing slash.)</entry>
</row>
man: document new specifiers
2020-04-28 23:50:50 +03:00
<row id='w'>
<entry><literal>%w</literal></entry>
<entry>Operating system version ID</entry>
<entry>The operating system version identifier of the running system, as read from the <varname>VERSION_ID=</varname> field of <filename>/etc/os-release</filename>. If not set, resolves to an empty string. See <citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry> for more information.</entry>
</row>
<row id='W'>
<entry><literal>%W</literal></entry>
<entry>Operating system variant ID</entry>
<entry>The operating system variant identifier of the running system, as read from the <varname>VARIANT_ID=</varname> field of <filename>/etc/os-release</filename>. If not set, resolves to an empty string. See <citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry> for more information.</entry>
</row>
man: migrate more specifier explanations to standard-specifiers.xml We probably can migrate even more, but for now let's just migrate those which have the 1:1 identical text everywhere. (Also, let's add the % entry to all specifier tables)
2020-04-30 13:26:11 +03:00
<row id='percent'>
<entry><literal>%%</literal></entry>
<entry>Single percent sign</entry>
<entry>Use <literal>%%</literal> in place of <literal>%</literal> to specify a single percent sign.</entry>
</row>
man: document new specifiers
2020-04-28 23:50:50 +03:00
</tbody>
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