systemd/man/udev_list_entry.xml
2023-09-25 22:29:38 +01:00

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<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
<!ENTITY % entities SYSTEM "custom-entities.ent" >
%entities;
]>
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
<refentry id="udev_list_entry"
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>udev_list_entry</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>udev_list_entry</refentrytitle>
<manvolnum>3</manvolnum>
</refmeta>
<refnamediv>
<refname>udev_list_entry</refname>
<refname>udev_list_entry_get_next</refname>
<refname>udev_list_entry_get_by_name</refname>
<refname>udev_list_entry_get_name</refname>
<refname>udev_list_entry_get_value</refname>
<refpurpose>Iterate and access udev lists</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include &lt;libudev.h&gt;</funcsynopsisinfo>
<funcprototype>
<funcdef>struct udev_list_entry *<function>udev_list_entry_get_next</function></funcdef>
<paramdef>struct udev_list_entry *<parameter>list_entry</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>struct udev_list_entry *<function>udev_list_entry_get_by_name</function></funcdef>
<paramdef>struct udev_list_entry *<parameter>list_entry</parameter></paramdef>
<paramdef>const char *<parameter>name</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>const char *<function>udev_list_entry_get_name</function></funcdef>
<paramdef>struct udev_list_entry *<parameter>list_entry</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>const char *<function>udev_list_entry_get_value</function></funcdef>
<paramdef>struct udev_list_entry *<parameter>list_entry</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<!--<refsect1>
<title>Description</title>
<para>XXX: Add short description.</para>
</refsect1>-->
<refsect1>
<title>Return Value</title>
<para>On success,
<function>udev_list_entry_get_next()</function> and
<function>udev_list_entry_get_by_name()</function> return
a pointer to the requested list entry. If no such entry can
be found, or on failure, <constant>NULL</constant> is
returned.</para>
<para>On success,
<function>udev_list_entry_get_name()</function> and
<function>udev_list_entry_get_value()</function> return a
pointer to a constant string representing the requested value.
The string is bound to the lifetime of the list entry itself.
On failure, <constant>NULL</constant> is returned.</para>
</refsect1>
<refsect1>
<title>History</title>
<para><function>udev_list_entry_get_next()</function>,
<function>udev_list_entry_get_by_name()</function>,
<function>udev_list_entry_get_name()</function>, and
<function>udev_list_entry_get_value()</function> were added in version 221.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>udev_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>udev_device_new_from_syspath</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>udev_enumerate_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>udev_monitor_new_from_netlink</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
</para>
</refsect1>
</refentry>