--- /dev/null
+<?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 2016 Julian Orth
+
+ 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_message_read_basic">
+
+ <refentryinfo>
+ <title>sd_bus_message_read_basic</title>
+ <productname>systemd</productname>
+
+ <authorgroup>
+ <author>
+ <firstname>Julian</firstname>
+ <surname>Orth</surname>
+ <email>ju.orth@gmail.com</email>
+ </author>
+ </authorgroup>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>sd_bus_message_read_basic</refentrytitle>
+ <manvolnum>3</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>sd_bus_message_read_basic</refname>
+
+ <refpurpose>Read a basic type from a message</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
+
+ <funcprototype>
+ <funcdef>int <function>sd_bus_message_read_basic</function></funcdef>
+ <paramdef>sd_bus_message *<parameter>m</parameter></paramdef>
+ <paramdef>char <parameter>type</parameter></paramdef>
+ <paramdef>void *<parameter>p</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>
+ <function>sd_bus_message_read_basic()</function> reads a basic type from a
+ message and advances the read position in the message. The set of basic
+ types and their ascii codes passed in <parameter>type</parameter> are
+ described in the <ulink
+ url="https://dbus.freedesktop.org/doc/dbus-specification.html">D-Bus
+ Specification</ulink>.
+ </para>
+
+ <para>
+ If <parameter>p</parameter> is not NULL, it should contain a pointer to an
+ appropriate object. For example, if <parameter>type</parameter> is
+ <constant>'y'</constant>, the object passed in <parameter>p</parameter>
+ should have type <code>uint8_t *</code>. If <parameter>type</parameter>
+ is <constant>'s'</constant>, the object passed in <parameter>p</parameter>
+ should have type <code>const char **</code>. Note that, if the basic type
+ is a pointer (e.g., <code>const char *</code> in the case of a string),
+ the pointer is only borrowed and the contents must be copied if they are
+ to be used after the end of the messages lifetime. Similarly, during the
+ lifetime of such a pointer, the message must not be modified.
+ </para>
+
+ <para>
+ If there is no object of the specified type at the current position in the
+ message, an error is returned.
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>
+ On success, <function>sd_bus_message_read_basic()</function> returns 0 or
+ a positive integer. On failure, it returns a negative errno-style error
+ code.
+ </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>,
+ </para>
+ </refsect1>
+
+</refentry>
~ianmdlvl / elogind.git / blobdiff