<?xml version='1.0'?> <!--*-nxml-*--> <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/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 <libudev.h></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><simplelist type="inline"> <member><citerefentry><refentrytitle>udev_new</refentrytitle><manvolnum>3</manvolnum></citerefentry></member> <member><citerefentry><refentrytitle>udev_device_new_from_syspath</refentrytitle><manvolnum>3</manvolnum></citerefentry></member> <member><citerefentry><refentrytitle>udev_enumerate_new</refentrytitle><manvolnum>3</manvolnum></citerefentry></member> <member><citerefentry><refentrytitle>udev_monitor_new_from_netlink</refentrytitle><manvolnum>3</manvolnum></citerefentry></member> <member><citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry></member> </simplelist></para> </refsect1> </refentry>