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Diffstat (limited to 'man/sd_bus_set_fd.xml')
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diff --git a/man/sd_bus_set_fd.xml b/man/sd_bus_set_fd.xml new file mode 100644 index 0000000..a79458a --- /dev/null +++ b/man/sd_bus_set_fd.xml @@ -0,0 +1,120 @@ +<?xml version='1.0'?> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> + +<!-- + SPDX-License-Identifier: LGPL-2.1-or-later + + Copyright © 2016 Julian Orth +--> + +<refentry id="sd_bus_set_fd" xmlns:xi="http://www.w3.org/2001/XInclude"> + + <refentryinfo> + <title>sd_bus_set_fd</title> + <productname>systemd</productname> + </refentryinfo> + + <refmeta> + <refentrytitle>sd_bus_set_fd</refentrytitle> + <manvolnum>3</manvolnum> + </refmeta> + + <refnamediv> + <refname>sd_bus_set_fd</refname> + + <refpurpose>Set the file descriptors to use for bus communication</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo> + + <funcprototype> + <funcdef>int <function>sd_bus_set_fd</function></funcdef> + <paramdef>sd_bus *<parameter>bus</parameter></paramdef> + <paramdef>int <parameter>input_fd</parameter></paramdef> + <paramdef>int <parameter>output_fd</parameter></paramdef> + </funcprototype> + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><function>sd_bus_set_fd()</function> sets the file descriptors used to communicate by a bus + connection object. Both <parameter>input_fd</parameter> and <parameter>output_fd</parameter> must be + valid file descriptors, referring to stream-based file objects (e.g. a stream socket, a pair of pipes or + FIFOs, or even a TTY device). <parameter>input_fd</parameter> must be readable, and + <parameter>output_fd</parameter> must be writable. The same file descriptor may be used (and typically is + used) as both the input and the output file descriptor. This function must be called before the bus + connection is started via + <citerefentry><refentrytitle>sd_bus_start</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para> + + <para>The bus connection object will take possession of the passed file descriptors and will close them + automatically when it is freed. Use + <citerefentry><refentrytitle>sd_bus_set_close_on_exit</refentrytitle><manvolnum>3</manvolnum></citerefentry> + to turn off this behaviour.</para> + </refsect1> + + <refsect1> + <title>Return Value</title> + + <para>On success, <function>sd_bus_set_fd()</function> returns a non-negative integer. On + failure, it returns a negative errno-style error code.</para> + + <refsect2> + <title>Errors</title> + + <para>Returned errors may indicate the following problems:</para> + + <variablelist> + <varlistentry> + <term><constant>-EINVAL</constant></term> + + <listitem><para>An invalid bus object was passed.</para></listitem> + </varlistentry> + + <varlistentry> + <term><constant>-ECHILD</constant></term> + + <listitem><para>The bus connection was allocated in a parent process and is being reused + in a child process after <function>fork()</function>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><constant>-EBADF</constant></term> + + <listitem><para>An invalid file descriptor was passed to + <function>sd_bus_set_fd()</function>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><constant>-ENOPKG</constant></term> + + <listitem><para>The bus cannot be resolved.</para></listitem> + </varlistentry> + + <varlistentry> + <term><constant>-EPERM</constant></term> + + <listitem><para>The bus connection has already been started.</para></listitem> + </varlistentry> + </variablelist> + </refsect2> + </refsect1> + + <xi:include href="libsystemd-pkgconfig.xml" /> + + <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_get_fd</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd_bus_start</refentrytitle><manvolnum>3</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> |