<?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_device_get_syspath" xmlns:xi="http://www.w3.org/2001/XInclude"> <refentryinfo> <title>udev_device_get_syspath</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_device_get_syspath</refentrytitle> <manvolnum>3</manvolnum> </refmeta> <refnamediv> <refname>udev_device_get_syspath</refname> <refname>udev_device_get_sysname</refname> <refname>udev_device_get_sysnum</refname> <refname>udev_device_get_devpath</refname> <refname>udev_device_get_devnode</refname> <refname>udev_device_get_devnum</refname> <refname>udev_device_get_devtype</refname> <refname>udev_device_get_subsystem</refname> <refname>udev_device_get_driver</refname> <refname>udev_device_get_udev</refname> <refname>udev_device_get_parent</refname> <refname>udev_device_get_parent_with_subsystem_devtype</refname> <refname>udev_device_get_is_initialized</refname> <refname>udev_device_get_action</refname> <refpurpose>Query device properties</refpurpose> </refnamediv> <refsynopsisdiv> <funcsynopsis> <funcsynopsisinfo>#include <libudev.h></funcsynopsisinfo> <funcprototype> <funcdef>const char *<function>udev_device_get_syspath</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>const char *<function>udev_device_get_sysname</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>const char *<function>udev_device_get_sysnum</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>const char *<function>udev_device_get_devpath</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>const char *<function>udev_device_get_devnode</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>dev_t <function>udev_device_get_devnum</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>const char *<function>udev_device_get_devtype</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>const char *<function>udev_device_get_subsystem</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>const char *<function>udev_device_get_driver</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>struct udev *<function>udev_device_get_udev</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>struct udev_device *<function>udev_device_get_parent</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>struct udev_device *<function>udev_device_get_parent_with_subsystem_devtype</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> <paramdef>const char *<parameter>subsystem</parameter></paramdef> <paramdef>const char *<parameter>devtype</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>int <function>udev_device_get_is_initialized</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>const char *<function>udev_device_get_action</function></funcdef> <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> </funcprototype> </funcsynopsis> </refsynopsisdiv> <!--<refsect1> <title>Description</title> <para>XXX: Add documentation.</para> </refsect1>--> <refsect1> <title>Return Value</title> <para>On success, <function>udev_device_get_syspath()</function>, <function>udev_device_get_sysname()</function>, <function>udev_device_get_sysnum()</function>, <function>udev_device_get_devpath()</function>, <function>udev_device_get_devnode()</function>, <function>udev_device_get_devtype()</function>, <function>udev_device_get_subsystem()</function>, <function>udev_device_get_driver()</function> and <function>udev_device_get_action()</function> return a pointer to a constant string that describes the requested property. The lifetime of this string is bound to the device it was requested on. On failure, each function may return <constant>NULL</constant>.</para> <para>On success, <function>udev_device_get_devnum()</function> returns the device type of the passed device. On failure, a device type with minor and major number set to <constant>0</constant> is returned.</para> <para><function>udev_device_get_udev()</function> always returns a valid pointer to the udev context that this device belongs to.</para> <para>On success, <function>udev_device_get_parent()</function> and <function>udev_device_get_parent_with_subsystem_devtype()</function> return a pointer to the parent device. No additional reference to this device is acquired, but the child device owns a reference to such a parent device. On failure, <constant>NULL</constant> is returned.</para> <para>On success, <function>udev_device_get_is_initialized()</function> returns either <constant>1</constant> or <constant>0</constant>, depending on whether the passed device has already been initialized by udev or not. On failure, a negative error code is returned. Note that devices for which no udev rules are defined are never reported initialized.</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_device_has_tag</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_list_entry</refentrytitle><manvolnum>3</manvolnum></citerefentry>, <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, </para> </refsect1> </refentry>