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210 lines
8.3 KiB
XML
210 lines
8.3 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
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<!ENTITY % entities SYSTEM "custom-entities.ent" >
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%entities;
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]>
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<!--
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SPDX-License-Identifier: LGPL-2.1+
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This file is part of systemd.
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Copyright 2015 David Herrmann <dh.herrmann@gmail.com>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="udev_device_get_syspath"
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>udev_device_get_syspath</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>David</firstname>
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<surname>Herrmann</surname>
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<email>dh.herrmann@gmail.com</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>udev_device_get_syspath</refentrytitle>
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<manvolnum>3</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>udev_device_get_syspath</refname>
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<refname>udev_device_get_sysname</refname>
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<refname>udev_device_get_sysnum</refname>
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<refname>udev_device_get_devpath</refname>
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<refname>udev_device_get_devnode</refname>
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<refname>udev_device_get_devnum</refname>
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<refname>udev_device_get_devtype</refname>
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<refname>udev_device_get_subsystem</refname>
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<refname>udev_device_get_driver</refname>
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<refname>udev_device_get_udev</refname>
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<refname>udev_device_get_parent</refname>
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<refname>udev_device_get_parent_with_subsystem_devtype</refname>
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<refname>udev_device_get_is_initialized</refname>
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<refname>udev_device_get_action</refname>
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<refpurpose>Query device properties</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcsynopsisinfo>#include <libudev.h></funcsynopsisinfo>
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<funcprototype>
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<funcdef>const char *<function>udev_device_get_syspath</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>const char *<function>udev_device_get_sysname</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>const char *<function>udev_device_get_sysnum</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>const char *<function>udev_device_get_devpath</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>const char *<function>udev_device_get_devnode</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>dev_t <function>udev_device_get_devnum</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>const char *<function>udev_device_get_devtype</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>const char *<function>udev_device_get_subsystem</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>const char *<function>udev_device_get_driver</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>struct udev *<function>udev_device_get_udev</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>struct udev_device *<function>udev_device_get_parent</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>struct udev_device *<function>udev_device_get_parent_with_subsystem_devtype</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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<paramdef>const char *<parameter>subsystem</parameter></paramdef>
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<paramdef>const char *<parameter>devtype</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>udev_device_get_is_initialized</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>const char *<function>udev_device_get_action</function></funcdef>
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<paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<!--<refsect1>
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<title>Description</title>
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<para>XXX: Add documentation.</para>
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</refsect1>-->
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<refsect1>
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<title>Return Value</title>
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<para>On success, <function>udev_device_get_syspath()</function>,
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<function>udev_device_get_sysname()</function>,
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<function>udev_device_get_sysnum()</function>,
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<function>udev_device_get_devpath()</function>,
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<function>udev_device_get_devnode()</function>,
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<function>udev_device_get_devtype()</function>,
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<function>udev_device_get_subsystem()</function>,
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<function>udev_device_get_driver()</function> and
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<function>udev_device_get_action()</function> return a pointer
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to a constant string that describes the requested property. The
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lifetime of this string is bound to the device it was requested
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on. On failure, each function may return
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<constant>NULL</constant>.</para>
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<para>On success, <function>udev_device_get_devnum()</function>
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returns the device type of the passed device. On failure, a
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device type with minor and major number set to
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<constant>0</constant> is returned.</para>
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<para><function>udev_device_get_udev()</function> always returns
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a valid pointer to the udev context that this device belongs
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to.</para>
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<para>On success, <function>udev_device_get_parent()</function>
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and
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<function>udev_device_get_parent_with_subsystem_devtype()</function>
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return a pointer to the parent device. No additional reference
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to this device is acquired, but the child device owns a reference
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to such a parent device. On failure, <constant>NULL</constant>
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is returned.</para>
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<para>On success, <function>udev_device_get_is_initialized()</function> returns either <constant>1</constant> or
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<constant>0</constant>, depending on whether the passed device has already been initialized by udev or not. On
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failure, a negative error code is returned. Note that devices for which no udev rules are defined are never
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reported initialized.</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>udev_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udev_device_new_from_syspath</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udev_device_has_tag</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udev_enumerate_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udev_monitor_new_from_netlink</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>udev_list_entry</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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</para>
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</refsect1>
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</refentry>
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