"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
- This file is part of elogind.
SPDX-License-Identifier: LGPL-2.1+
-
-
- Copyright 2012 Lennart Poettering
-
- elogind is free software; you can redistribute it and/or modify it
- 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.
-
- elogind 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with elogind; If not, see <http://www.gnu.org/licenses/>.
-->
-<refentry id="sd_id128_get_machine">
+<refentry id="sd_id128_get_machine" xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>sd_id128_get_machine</title>
<refsect1>
<title>Return Value</title>
- <para>The two calls return 0 on success (in which case
- <parameter>ret</parameter> is filled in), or a negative
- errno-style error code.</para>
+ <para>Those calls return 0 on success (in which case <parameter>ret</parameter> is filled in),
+ or a negative errno-style error code. In particular, <function>sd_id128_get_machine()</function>
+ and <function>sd_id128_get_machine_app_specific()</function> return <constant>-ENOENT</constant>
+ if <filename>/etc/machine-id</filename> is missing, and <constant>-ENOMEDIUM</constant> if is
+ empty or all zeros.</para>
</refsect1>
- <refsect1>
- <title>Notes</title>
-
- <para>The <function>sd_id128_get_machine()</function>, <function>sd_id128_get_machine_app_specific()</function>
- <function>sd_id128_get_boot()</function> and <function>sd_id128_get_invocation()</function> interfaces are
- available as a shared library, which can be compiled and linked to with the
- <literal>libelogind</literal> <citerefentry
- project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry> file.</para>
- </refsect1>
+ <xi:include href="libelogind-pkgconfig.xml" />
<refsect1>
<title>Examples</title>