178 lines
5.7 KiB
Diff
178 lines
5.7 KiB
Diff
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From ba4b35669ef233fef414b1429fbdc085537b33e7 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Thu, 2 Oct 2014 20:49:30 -0400
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Subject: [PATCH] man: add sd_event_get_fd(3)
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Example from Tom Gundersen is included using xi:include.
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The copyright notice stands out a bit. Maybe it should be removed,
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and the code placed in public domain.
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---
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Makefile-man.am | 2 +
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man/sd_event_get_fd.xml | 137 ++++++++++++++++++++++++++++++++++++++++++++++++
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2 files changed, 139 insertions(+)
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create mode 100644 man/sd_event_get_fd.xml
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diff --git a/Makefile-man.am b/Makefile-man.am
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index 2b3fa95e70..aff5186c2d 100644
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--- a/Makefile-man.am
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+++ b/Makefile-man.am
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@@ -733,6 +733,7 @@ MANPAGES += \
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man/sd_event_add_defer.3 \
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man/sd_event_add_signal.3 \
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man/sd_event_add_time.3 \
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+ man/sd_event_get_fd.3 \
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man/sd_event_new.3 \
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man/systemd-bus-proxyd.8 \
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man/systemd-bus-proxyd@.service.8
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@@ -1574,6 +1575,7 @@ EXTRA_DIST += \
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man/sd_event_add_defer.xml \
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man/sd_event_add_signal.xml \
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man/sd_event_add_time.xml \
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+ man/sd_event_get_fd.xml \
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man/sd_event_new.xml \
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man/sd_get_seats.xml \
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man/sd_id128_get_machine.xml \
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diff --git a/man/sd_event_get_fd.xml b/man/sd_event_get_fd.xml
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new file mode 100644
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index 0000000000..f60d807136
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--- /dev/null
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+++ b/man/sd_event_get_fd.xml
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@@ -0,0 +1,137 @@
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+<?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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+
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+<!--
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+This file is part of systemd.
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+
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+Copyright 2014 Zbigniew Jędrzejewski-Szmek
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+
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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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+
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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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+
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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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+
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+<refentry id="sd_event_get_fd" conditional="ENABLE_KDBUS"
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+ xmlns:xi="http://www.w3.org/2001/XInclude">
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+
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+ <refentryinfo>
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+ <title>sd_event_get_fd</title>
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+ <productname>systemd</productname>
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+
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+ <authorgroup>
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+ <author>
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+ <contrib>More text</contrib>
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+ <firstname>Zbigniew</firstname>
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+ <surname>Jędrzejewski-Szmek</surname>
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+ <email>zbyszek@in.waw.pl</email>
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+ </author>
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+ </authorgroup>
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+ </refentryinfo>
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+
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+ <refmeta>
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+ <refentrytitle>sd_event_get_fd</refentrytitle>
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+ <manvolnum>3</manvolnum>
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+ </refmeta>
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+
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+ <refnamediv>
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+ <refname>sd_event_get_fd</refname>
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+
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+ <refpurpose>Obtain a file descriptor to poll for event loop events</refpurpose>
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+ </refnamediv>
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+
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+ <refsynopsisdiv>
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+ <funcsynopsis>
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+ <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
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+
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+ <funcprototype>
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+ <funcdef>int <function>sd_event_get_fd</function></funcdef>
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+ <paramdef>sd_bus *<parameter>event</parameter></paramdef>
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+ </funcprototype>
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+
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+ </funcsynopsis>
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+ </refsynopsisdiv>
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+
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+ <refsect1>
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+ <title>Description</title>
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+
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+ <para><function>sd_event_get_fd()</function> returns the file
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+ descriptor that the event loop object returned by the
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+ <citerefentry><refentrytitle>sd_event_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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+ function uses to wait for events. This file descriptor can be
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+ polled for events. This makes it possible to embed the
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+ <citerefentry><refentrytitle>sd-event</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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+ event loop inside of another event loop.</para>
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+ </refsect1>
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+
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+ <refsect1>
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+ <title>Return Value</title>
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+
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+ <para>On success, <function>sd_event_get_fd()</function> returns a
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+ non-negative integer. On failure, it returns a negative
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+ errno-style error code.</para>
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+ </refsect1>
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+
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+ <refsect1>
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+ <title>Errors</title>
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+
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+ <para>Returned errors may indicate the following problems:</para>
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+
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+ <variablelist>
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+ <varlistentry>
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+ <term><constant>-EINVAL</constant></term>
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+
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+ <listitem><para><parameter>event</parameter> is not a valid
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+ pointer to an <structname>sd_event</structname> structure.
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+ </para></listitem>
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+ </varlistentry>
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+
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+ <varlistentry>
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+ <term><constant>-ECHILD</constant></term>
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+
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+ <listitem><para>The event loop has been created in a different process.</para></listitem>
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+
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+ </varlistentry>
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+ </variablelist>
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+ </refsect1>
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+
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+ <refsect1>
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+ <title>Examples</title>
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+
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+ <example>
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+ <title>Integration in glib event loop</title>
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+
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+ <programlisting><xi:include href="glib-event-glue.c" parse="text" /></programlisting>
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+ </example>
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+ </refsect1>
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+
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+ <refsect1>
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+ <title>Notes</title>
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+
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+ <para><function>sd_event_get_fd()</function> is available as a
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+ shared library, which can be compiled and linked to with the
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+ <constant>libsystemd</constant> <citerefentry
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+ project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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+ file.</para>
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+ </refsect1>
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+
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+ <refsect1>
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+ <title>See Also</title>
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+
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+ <para>
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+ <citerefentry><refentrytitle>sd-event</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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+ <citerefentry><refentrytitle>sd_event_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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+ <citerefentry><refentrytitle>sd_event_ref</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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+ </para>
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+ </refsect1>
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+
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+</refentry>
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