mirror of
https://github.com/systemd/systemd.git
synced 2024-12-25 01:34:28 +03:00
bb31a4ac19
https://bugs.freedesktop.org/show_bug.cgi?id=55890
Fixed typos, serial comma, and removed "either" as there were more
than two options. Also did an extra rename of "system-shutdown"
to "systemd-shutdown" that was forgotten in commit
8bd3b8620c
132 lines
5.6 KiB
XML
132 lines
5.6 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
|
|
<!--
|
|
This file is part of systemd.
|
|
|
|
Copyright 2012 Lennart Poettering
|
|
|
|
systemd 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.
|
|
|
|
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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
-->
|
|
|
|
<refentry id="sd_id128_to_string">
|
|
|
|
<refentryinfo>
|
|
<title>sd_id128_to_string</title>
|
|
<productname>systemd</productname>
|
|
|
|
<authorgroup>
|
|
<author>
|
|
<contrib>Developer</contrib>
|
|
<firstname>Lennart</firstname>
|
|
<surname>Poettering</surname>
|
|
<email>lennart@poettering.net</email>
|
|
</author>
|
|
</authorgroup>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>sd_id128_to_string</refentrytitle>
|
|
<manvolnum>3</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>sd_id128_to_string</refname>
|
|
<refname>sd_id128_from_string</refname>
|
|
<refpurpose>Format or parse 128 bit IDs as strings</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<funcsynopsis>
|
|
<funcsynopsisinfo>#include <systemd/sd-id128.h></funcsynopsisinfo>
|
|
|
|
<funcprototype>
|
|
<funcdef>char* <function>sd_id128_to_string</function></funcdef>
|
|
<paramdef>sd_id128_t <parameter>id</parameter>, char <parameter>s</parameter>[33]</paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_id128_from_string</function></funcdef>
|
|
<paramdef>const char <parameter>s</parameter>[33], sd_id128_t* <parameter>ret</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><function>sd_id128_to_string()</function>
|
|
formats a 128 bit ID as character string. It expects
|
|
the ID and a string array capable of storing 33
|
|
characters. The ID will be formatted as 32 lowercase
|
|
hexadecimal digits and be terminated by a NUL
|
|
byte.</para>
|
|
|
|
<para><function>sd_id128_from_string()</function>
|
|
implements the reverse operation: it takes a 33
|
|
character array with 32 hexadecimal digits
|
|
(terminated by NUL) and parses them back into an
|
|
128 bit ID returned in
|
|
<parameter>ret</parameter>.</para>
|
|
|
|
<para>For more information about the
|
|
<literal>sd_id128_t</literal> type see
|
|
<citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para>
|
|
|
|
<para>When formatting a 128 bit ID into a string it is
|
|
often easier to use a format string for
|
|
<citerefentry><refentrytitle>printf</refentrytitle><manvolnum>3</manvolnum></citerefentry>. This
|
|
is easily done using the
|
|
<function>SD_ID128_FORMAT_STR</function> and
|
|
<function>SD_ID128_FORMAT_VAL()</function> macros. For
|
|
more information see
|
|
<citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Return Value</title>
|
|
|
|
<para><function>sd_id128_to_string()</function> always
|
|
succeeds and returns a pointer to the string array
|
|
passed in. <function>sd_id128_from_string</function>
|
|
returns 0 on success (in which case
|
|
<parameter>ret</parameter> is filled in), or a negative
|
|
errno-style error code.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Notes</title>
|
|
|
|
<para>The <function>sd_id128_to_string()</function>
|
|
and <function>sd_id128_from_string()</function> interfaces are
|
|
available as shared library, which can be compiled and
|
|
linked to with the <literal>libsystemd-id128</literal>
|
|
<citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
|
file.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>printf</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|