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authorLuke Shumaker <lukeshu@sbcglobal.net>2016-10-26 22:49:41 -0400
committerLuke Shumaker <lukeshu@sbcglobal.net>2016-10-26 22:49:41 -0400
commit41b7beb7404c134820870ab21ae0242dfc749b2c (patch)
tree957fffe220f59dae0af2285f5004f300107c7152 /src/libudev/udev_new.xml
parent2b1abe52835e2f9a85657009b3432cf2c2bdc417 (diff)
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+<?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_new"
+ xmlns:xi="http://www.w3.org/2001/XInclude">
+
+ <refentryinfo>
+ <title>udev_new</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_new</refentrytitle>
+ <manvolnum>3</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>udev_new</refname>
+ <refname>udev_ref</refname>
+ <refname>udev_unref</refname>
+
+ <refpurpose>Create, acquire and release a udev context object</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include &lt;libudev.h&gt;</funcsynopsisinfo>
+
+ <funcprototype>
+ <funcdef>struct udev *<function>udev_new</function></funcdef>
+ <paramdef><parameter>void</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>struct udev *<function>udev_ref</function></funcdef>
+ <paramdef>struct udev *<parameter>udev</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>struct udev *<function>udev_unref</function></funcdef>
+ <paramdef>struct udev *<parameter>udev</parameter></paramdef>
+ </funcprototype>
+
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><function>udev_new()</function> allocates a new udev context
+ 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 context
+ is 1. You can acquire further references, and drop gained references
+ via <function>udev_ref()</function> and
+ <function>udev_unref()</function>. Once the reference count hits 0,
+ the context object is destroyed and freed.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>On success, <function>udev_new()</function> returns a pointer
+ to the allocated udev context. On failure, <constant>NULL</constant>
+ is returned. <function>udev_ref()</function> returns the argument
+ that it was passed, unmodified. <function>udev_unref()</function>
+ always returns <constant>NULL</constant>.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ </para>
+ </refsect1>
+
+</refentry>