Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
identifying the operating system,
excluding any version information and
suitable for processing by scripts or
- usage in generated file names. If not
+ usage in generated filenames. If not
set defaults to
<literal>ID=linux</literal>. Example:
<literal>ID=fedora</literal> or
system version, excluding any OS name
information or release code name, and
suitable for processing by scripts or
- usage in generated file names. This
+ usage in generated filenames. This
field is optional. Example:
<literal>VERSION_ID=17</literal> or
<literal>VERSION_ID=11.04</literal>.</para></listitem>
<listitem><para>Links to resources on
the Internet related the operating
system. <varname>HOME_URL=</varname>
- should refer to the homepage of the of
+ should refer to the homepage of the
operating system, or alternatively
some homepage of the specific version
of the operating
URLs are intended to be exposed in
"About this system" UIs behind links
with captions such as "About this
- Operating System", "Obtain Support"
- resp. "Report a Bug". The values should
+ Operating System", "Obtain Support",
+ and "Report a Bug". The values should
be in <ulink
url="https://tools.ietf.org/html/rfc3986">RFC3986
format</ulink>, and should be
<literal>BUG_REPORT_URL="https://bugzilla.redhat.com/"</literal></para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>BUILD_ID=</varname></term>
+
+ <listitem><para>A string uniquely
+ identifying the system image used as
+ the origin for a distribution (it is
+ not updated with system updates). The
+ field can be identical between
+ different VERSION_IDs as BUILD_ID is
+ an only a unique identifier to a
+ specific version. Distributions that
+ release each update as a new version
+ would only need to use VERSION_ID as
+ each build is already distinct based
+ on the VERSION_ID. This field is
+ optional. Example:
+ <literal>BUILD_ID="2013-03-20.3"</literal>
+ or
+ <literal>BUILD_ID=201303203</literal>.
+
+ </para></listitem>
+ </varlistentry>
</variablelist>
<para>Operating system vendors may extend the file
format and introduce new fields. It is highly
recommended to prefix new fields with an OS specific
- name in order to avoid name clashes. Example:
+ name in order to avoid name clashes. Applications
+ reading this file must ignore unknown fields. Example:
<literal>DEBIAN_BTS="debbugs://bugs.debian.org/"</literal></para>
</refsect1>