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+<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+
+<!--
+  This file is part of systemd.
+
+  Copyright 2014 Zbigniew Jędrzejewski-Szmek
+
+  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="sd_bus_new">
+
+  <refentryinfo>
+    <title>sd_bus_new</title>
+    <productname>systemd</productname>
+
+    <authorgroup>
+      <author>
+        <contrib>A monkey with a typewriter</contrib>
+        <firstname>Zbigniew</firstname>
+        <surname>Jędrzejewski-Szmek</surname>
+        <email>zbyszek@in.waw.pl</email>
+      </author>
+    </authorgroup>
+  </refentryinfo>
+
+  <refmeta>
+    <refentrytitle>sd_bus_new</refentrytitle>
+    <manvolnum>3</manvolnum>
+  </refmeta>
+
+  <refnamediv>
+    <refname>sd_bus_new</refname>
+    <refname>sd_bus_ref</refname>
+    <refname>sd_bus_unref</refname>
+    <refname>sd_bus_unrefp</refname>
+
+    <refpurpose>Create a new bus object and create or destroy references to it</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <funcsynopsis>
+      <funcsynopsisinfo>#include &lt;systemd/sd-bus.h&gt;</funcsynopsisinfo>
+
+      <funcprototype>
+        <funcdef>int <function>sd_bus_new</function></funcdef>
+        <paramdef>sd_bus **<parameter>bus</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>sd_bus *<function>sd_bus_ref</function></funcdef>
+        <paramdef>sd_bus *<parameter>bus</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>sd_bus *<function>sd_bus_unref</function></funcdef>
+        <paramdef>sd_bus *<parameter>bus</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>void <function>sd_bus_unrefp</function></funcdef>
+        <paramdef>sd_bus **<parameter>bus</parameter></paramdef>
+      </funcprototype>
+    </funcsynopsis>
+  </refsynopsisdiv>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para><function>sd_bus_new()</function> creates a new bus
+    object. This object is reference-counted, and will be destroyed
+    when all references are gone. Initially, the caller of this
+    function owns the sole reference and the bus object will not be
+    connected to any bus. To connect it to a bus, make sure
+    to set an address with
+    <citerefentry><refentrytitle>sd_bus_set_address</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+    or a related call, and then start the connection with
+    <citerefentry><refentrytitle>sd_bus_start</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para>
+
+    <para>In most cases, it is a better idea to invoke
+    <citerefentry><refentrytitle>sd_bus_default_user</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+    <citerefentry><refentrytitle>sd_bus_default_system</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+    or related calls instead of the more low-level
+    <function>sd_bus_new()</function> and
+    <function>sd_bus_start()</function>. The higher-level calls not
+    only allocate a bus object but also start the connection to a
+    well-known bus in a single function invocation.</para>
+
+    <para><function>sd_bus_ref()</function> increases the reference
+    counter of <parameter>bus</parameter> by one.</para>
+
+    <para><function>sd_bus_unref()</function> decreases the reference
+    counter of <parameter>bus</parameter> by one. Once the reference
+    count has dropped to zero, <parameter>bus</parameter> is destroyed
+    and cannot be used anymore, so further calls to
+    <function>sd_bus_ref()</function> or
+    <function>sd_bus_unref()</function> are illegal.</para>
+
+    <para><function>sd_bus_unrefp()</function> is similar to
+    <function>sd_bus_unref()</function> but takes a pointer to a
+    pointer to an <type>sd_bus</type> object. This call is useful in
+    conjunction with GCC's and LLVM's <ulink
+    url="https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html">Clean-up
+    Variable Attribute</ulink>. Note that this function is defined as
+    inline function. Use a declaration like the following, in order to
+    allocate a bus object that is freed automatically as the code
+    block is left:</para>
+
+    <programlisting>{
+        __attribute__((cleanup(sd_bus_unrefp)) sd_bus *bus = NULL;
+        int r;
+        …
+        r = sd_bus_default(&amp;bus);
+        if (r &lt; 0)
+                fprintf(stderr, "Failed to allocate bus: %s\n", strerror(-r));
+        …
+}</programlisting>
+
+    <para><function>sd_bus_ref()</function>,
+    <function>sd_bus_unref()</function> and
+    <function>sd_bus_unrefp()</function> execute no operation if the
+    passed in bus object is <constant>NULL</constant>.</para>
+  </refsect1>
+
+  <refsect1>
+    <title>Return Value</title>
+
+    <para>On success, <function>sd_bus_new()</function> returns 0 or a
+    positive integer. On failure, it returns a negative errno-style
+    error code.</para>
+
+    <para><function>sd_bus_ref()</function> always returns the argument.
+    </para>
+
+    <para><function>sd_bus_unref()</function> always returns
+    <constant>NULL</constant>.</para>
+  </refsect1>
+
+  <refsect1>
+    <title>Errors</title>
+
+    <para>Returned errors may indicate the following problems:</para>
+
+    <variablelist>
+      <varlistentry>
+        <term><constant>-ENOMEM</constant></term>
+
+        <listitem><para>Memory allocation failed.</para></listitem>
+      </varlistentry>
+    </variablelist>
+  </refsect1>
+
+  <refsect1>
+    <title>Notes</title>
+
+    <para><function>sd_bus_new()</function> and other functions
+    described here are available as a shared library, which can be
+    compiled and linked to with the
+    <constant>libsystemd</constant> <citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+    file.</para>
+  </refsect1>
+
+  <refsect1>
+    <title>See Also</title>
+
+    <para>
+      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>sd_bus_default_user</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>sd_bus_default_system</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>sd_bus_open_user</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>sd_bus_open_system</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+    </para>
+  </refsect1>
+
+</refentry>