diff options
Diffstat (limited to 'man/udev_device_new_from_syspath.xml')
| -rw-r--r-- | man/udev_device_new_from_syspath.xml | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/man/udev_device_new_from_syspath.xml b/man/udev_device_new_from_syspath.xml deleted file mode 100644 index 0bb71c8e91..0000000000 --- a/man/udev_device_new_from_syspath.xml +++ /dev/null @@ -1,214 +0,0 @@ -<?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_new_from_syspath" - xmlns:xi="http://www.w3.org/2001/XInclude"> - - <refentryinfo> - <title>udev_device_new_from_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_new_from_syspath</refentrytitle> - <manvolnum>3</manvolnum> - </refmeta> - - <refnamediv> - <refname>udev_device_new_from_syspath</refname> - <refname>udev_device_new_from_devnum</refname> - <refname>udev_device_new_from_subsystem_sysname</refname> - <refname>udev_device_new_from_device_id</refname> - <refname>udev_device_new_from_environment</refname> - <refname>udev_device_ref</refname> - <refname>udev_device_unref</refname> - - <refpurpose>Create, acquire and release a udev device object</refpurpose> - </refnamediv> - - <refsynopsisdiv> - <funcsynopsis> - <funcsynopsisinfo>#include <libudev.h></funcsynopsisinfo> - - <funcprototype> - <funcdef>struct udev_device *<function>udev_device_new_from_syspath</function></funcdef> - <paramdef>struct udev *<parameter>udev</parameter></paramdef> - <paramdef>const char *<parameter>syspath</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>struct udev_device *<function>udev_device_new_from_devnum</function></funcdef> - <paramdef>struct udev *<parameter>udev</parameter></paramdef> - <paramdef>char <parameter>type</parameter></paramdef> - <paramdef>dev_t <parameter>devnum</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>struct udev_device *<function>udev_device_new_from_subsystem_sysname</function></funcdef> - <paramdef>struct udev *<parameter>udev</parameter></paramdef> - <paramdef>const char *<parameter>subsystem</parameter></paramdef> - <paramdef>const char *<parameter>sysname</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>struct udev_device *<function>udev_device_new_from_device_id</function></funcdef> - <paramdef>struct udev *<parameter>udev</parameter></paramdef> - <paramdef>const char *<parameter>id</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>struct udev_device *<function>udev_device_new_from_environment</function></funcdef> - <paramdef>struct udev *<parameter>udev</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>struct udev_device *<function>udev_device_ref</function></funcdef> - <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>struct udev_device *<function>udev_device_unref</function></funcdef> - <paramdef>struct udev_device *<parameter>udev_device</parameter></paramdef> - </funcprototype> - - </funcsynopsis> - </refsynopsisdiv> - - <refsect1> - <title>Description</title> - - <para><function>udev_device_new_from_syspath</function>, - <function>udev_device_new_from_devnum</function>, - <function>udev_device_new_from_subsystem_sysname</function>, - <function>udev_device_new_from_device_id</function>, and - <function>udev_device_new_from_environment</function> - allocate a new udev device object and returns a pointer to it. This - object is opaque and must not be accessed by the caller via different - means than functions provided by libudev. Initially, the reference count - of the device is 1. You can acquire further references, and drop - gained references via <function>udev_device_ref()</function> and - <function>udev_device_unref()</function>. Once the reference count hits 0, - the device object is destroyed and freed.</para> - - <para><function>udev_device_new_from_syspath</function>, - <function>udev_device_new_from_devnum</function>, - <function>udev_device_new_from_subsystem_sysname</function>, and - <function>udev_device_new_from_device_id</function> - create the device object based on information found in - <filename>/sys</filename>, annotated with properties from the udev-internal - device database. A syspath is any subdirectory of <filename>/sys</filename>, - with the restriction that a subdirectory of <filename>/sys/devices</filename> - (or a symlink to one) represents a real device and as such must contain - a <filename>uevent</filename> file. <function>udev_device_new_from_devnum</function> - takes a device type, which can be <constant>b</constant> for block devices or - <constant>c</constant> for character devices, as well as a devnum (see - <citerefentry project='man-pages'><refentrytitle>makedev</refentrytitle><manvolnum>3</manvolnum></citerefentry>). - <function>udev_device_new_from_subsystem_sysname</function> looks up devices based - on the provided subsystem and sysname - (see <citerefentry><refentrytitle>udev_device_get_subsystem</refentrytitle><manvolnum>3</manvolnum></citerefentry> - and - <citerefentry><refentrytitle>udev_device_get_sysname</refentrytitle><manvolnum>3</manvolnum></citerefentry>) - and <function>udev_device_new_from_device_id</function> looks up devices based on the provided - device ID, which is a special string in one of the following four forms: - <table> - <title>Device ID strings</title> - - <tgroup cols='2'> - <colspec colname='example' /> - <colspec colname='explanation' /> - <thead><row> - <entry>Example</entry> - <entry>Explanation</entry> - </row></thead> - <tbody> - <row><entry><varname>b8:2</varname></entry> - <entry>block device major:minor</entry></row> - - <row><entry><varname>c128:1</varname></entry> - <entry>char device major:minor</entry></row> - - <row><entry><varname>n3</varname></entry> - <entry>network device ifindex</entry></row> - - <row><entry><varname>+sound:card29</varname></entry> - <entry>kernel driver core subsystem:device name</entry></row> - </tbody> - </tgroup> - </table> - </para> - - <para><function>udev_device_new_from_environment</function> - creates a device from the current environment (see - <citerefentry project='man-pages'><refentrytitle>environ</refentrytitle><manvolnum>7</manvolnum></citerefentry>). - Each key-value pair is interpreted in the same way as if it was - received in an uevent (see - <citerefentry><refentrytitle>udev_monitor_receive_device</refentrytitle><manvolnum>3</manvolnum></citerefentry>). - The keys <constant>DEVPATH</constant>, <constant>SUBSYSTEM</constant>, - <constant>ACTION</constant>, and <constant>SEQNUM</constant> are mandatory.</para> - - </refsect1> - - <refsect1> - <title>Return Value</title> - - <para>On success, <function>udev_device_new_from_syspath()</function>, - <function>udev_device_new_from_devnum()</function>, - <function>udev_device_new_from_subsystem_sysname()</function>, - <function>udev_device_new_from_device_id()</function> and - <function>udev_device_new_from_environment()</function> return a - pointer to the allocated udev device. On failure, - <constant>NULL</constant> is returned, - and <varname>errno</varname> is set appropriately. - <function>udev_device_ref()</function> returns the argument - that it was passed, unmodified. - <function>udev_device_unref()</function> always returns - <constant>NULL</constant>.</para> - </refsect1> - - <refsect1> - <title>See Also</title> - - <para> - <citerefentry><refentrytitle>udev_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>, - <citerefentry><refentrytitle>udev_device_get_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> |