1 <?xml version='1.0'?> <!--*-nxml-*-->
2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
3 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
6 SPDX-License-Identifier: LGPL-2.1+
9 <refentry id="sd_id128_randomize" xmlns:xi="http://www.w3.org/2001/XInclude">
12 <title>sd_id128_randomize</title>
13 <productname>elogind</productname>
17 <refentrytitle>sd_id128_randomize</refentrytitle>
18 <manvolnum>3</manvolnum>
22 <refname>sd_id128_randomize</refname>
23 <refpurpose>Generate 128-bit IDs</refpurpose>
28 <funcsynopsisinfo>#include <elogind/sd-id128.h></funcsynopsisinfo>
31 <funcdef>int <function>sd_id128_randomize</function></funcdef>
32 <paramdef>sd_id128_t *<parameter>ret</parameter></paramdef>
39 <title>Description</title>
41 <para><function>sd_id128_randomize()</function> generates a new
42 randomized 128-bit ID and returns it in
43 <parameter>ret</parameter>. Every invocation returns a new
44 randomly generated ID. This uses the
45 <filename>/dev/urandom</filename> kernel random number
48 <para>Note that <function>sd_id128_randomize()</function> always
49 returns a UUID v4-compatible ID.</para>
51 <para>For more information about the <literal>sd_id128_t</literal>
53 <citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para>
55 <!-- 0 /// elogind does not support journalctl
56 <para><citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
57 <option>--new-id128</option> option may be used as a command line
58 front-end for <function>sd_id128_randomize()</function>.</para>
63 <title>Return Value</title>
65 <para>The call returns 0 on success (in which case
66 <parameter>ret</parameter> is filled in), or a negative
67 errno-style error code.</para>
70 <xi:include href="libelogind-pkgconfig.xml" />
73 <title>See Also</title>
76 <!-- 0 /// elogind is in section 8
77 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
79 <citerefentry><refentrytitle>elogind</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
81 <citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
82 <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
83 <citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>,
84 <citerefentry><refentrytitle>sd_id128_get_machine</refentrytitle><manvolnum>3</manvolnum></citerefentry>