<?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" [ <!ENTITY % entities SYSTEM "custom-entities.ent" > %entities; ]> <!-- This file is part of systemd. Copyright 2015 David Herrmann <dh.herrmann@gmail.com> 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="udev_monitor_receive_device" xmlns:xi="http://www.w3.org/2001/XInclude"> <refentryinfo> <title>udev_monitor_receive_device</title> <productname>systemd</productname> <authorgroup> <author> <contrib>Developer</contrib> <firstname>David</firstname> <surname>Herrmann</surname> <email>dh.herrmann@gmail.com</email> </author> </authorgroup> </refentryinfo> <refmeta> <refentrytitle>udev_monitor_receive_device</refentrytitle> <manvolnum>3</manvolnum> </refmeta> <refnamediv> <refname>udev_monitor_receive_device</refname> <refname>udev_monitor_enable_receiving</refname> <refname>udev_monitor_set_receive_buffer_size</refname> <refname>udev_monitor_get_fd</refname> <refname>udev_monitor_get_udev</refname> <refpurpose>Query and modify device monitor</refpurpose> </refnamediv> <refsynopsisdiv> <funcsynopsis> <funcsynopsisinfo>#include <libudev.h></funcsynopsisinfo> <funcprototype> <funcdef>struct udev_device *<function>udev_monitor_receive_device</function></funcdef> <paramdef>struct udev_monitor *<parameter>udev_monitor</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>int <function>udev_monitor_enable_receiving</function></funcdef> <paramdef>struct udev_monitor *<parameter>udev_monitor</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>int <function>udev_monitor_set_receive_buffer_size</function></funcdef> <paramdef>struct udev_monitor *<parameter>udev_monitor</parameter></paramdef> <paramdef>int <parameter>size</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>int <function>udev_monitor_get_fd</function></funcdef> <paramdef>struct udev_monitor *<parameter>udev_monitor</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>struct udev *<function>udev_monitor_get_udev</function></funcdef> <paramdef>struct udev_monitor *<parameter>udev_monitor</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_monitor_receive_device()</function> returns a pointer to a newly referenced device that was received via the monitor. The caller is responsible to drop this reference when done. On failure, <constant>NULL</constant> is returned.</para> <para>On success, <function>udev_monitor_enable_receiving()</function> and <function>udev_monitor_set_receive_buffer_size()</function> return an integer greater than, or equal to, <constant>0</constant>. On failure, a negative error code is returned.</para> <para>On success, <function>udev_monitor_get_fd()</function> returns the file descriptor used by this monitor. On failure, a negative error code is returned.</para> <para><function>udev_monitor_get_udev()</function> always returns a pointer to the udev context that this monitor is associated with.</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>udev_monitor_filter_update</refentrytitle><manvolnum>3</manvolnum></citerefentry>, <citerefentry><refentrytitle>udev_list_entry</refentrytitle><manvolnum>3</manvolnum></citerefentry>, <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, </para> </refsect1> </refentry>