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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_message_append_array" conditional="ENABLE_KDBUS"
- xmlns:xi="http://www.w3.org/2001/XInclude">
-
- <refentryinfo>
- <title>sd_bus_message_append_array</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_message_append_array</refentrytitle>
- <manvolnum>3</manvolnum>
- </refmeta>
-
- <refnamediv>
- <refname>sd_bus_message_append_array</refname>
- <refname>sd_bus_message_append_array_memfd</refname>
- <refname>sd_bus_message_append_array_iovec</refname>
- <refname>sd_bus_message_append_array_space</refname>
-
- <refpurpose>Attach an array of items to a message</refpurpose>
- </refnamediv>
-
- <refsynopsisdiv>
- <funcsynopsis>
- <funcsynopsisinfo>#include &lt;systemd/sd-bus.h&gt;</funcsynopsisinfo>
-
- <funcprototype>
- <funcdef>int sd_bus_message_append_array</funcdef>
- <paramdef>sd_bus_message *<parameter>m</parameter></paramdef>
- <paramdef>char <parameter>type</parameter></paramdef>
- <paramdef>char void *<parameter>ptr</parameter></paramdef>
- <paramdef>size_t <parameter>size</parameter></paramdef>
- </funcprototype>
-
- <funcprototype>
- <funcdef>int sd_bus_message_append_array_memfd</funcdef>
- <paramdef>sd_bus_message *<parameter>m</parameter></paramdef>
- <paramdef>char <parameter>type</parameter></paramdef>
- <paramdef>int <parameter>memfd</parameter></paramdef>
- </funcprototype>
-
- <funcprototype>
- <funcdef>int sd_bus_message_append_array_iovec</funcdef>
- <paramdef>sd_bus_message *<parameter>m</parameter></paramdef>
- <paramdef>char <parameter>type</parameter></paramdef>
- <paramdef>const struct iovec *<parameter>iov</parameter></paramdef>
- <paramdef>unsigned <parameter>n</parameter></paramdef>
- </funcprototype>
-
- <funcprototype>
- <funcdef>int sd_bus_message_append_array_space</funcdef>
- <paramdef>char <parameter>type</parameter></paramdef>
- <paramdef>size_t <parameter>size</parameter></paramdef>
- <paramdef>char void **<parameter>ptr</parameter></paramdef>
- </funcprototype>
- </funcsynopsis>
- </refsynopsisdiv>
-
- <refsect1>
- <title>Description</title>
-
- <para>The <function>sd_bus_message_append_array</function> functionc
- appends items to message <parameter>m</parameter> as the single
- array. A container will be opened, items appended, and the
- container closed. Parameter <parameter>type</parameter> determines
- how pointer <parameter>p</parameter> is interpreted.
- <parameter>type</parameter> must be one of the "trivial" types
- <literal>y</literal>, <literal>n</literal>, <literal>q</literal>,
- <literal>i</literal>, <literal>u</literal>, <literal>x</literal>,
- <literal>t</literal>, <literal>d</literal> (but not
- <literal>b</literal>), as defined by the
- <ulink url="http://dbus.freedesktop.org/doc/dbus-specification.html#basic-types">Basic Types</ulink>
- section of the D-Bus specification, and listed in
- <citerefentry><refentrytitle>sd_bus_message_append_basic</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
- Pointer <parameter>p</parameter> must point to an array of size
- <parameter>size</parameter> bytes containing items of the
- respective type. Size <parameter>size</parameter> must be a
- multiple of the size of the type <parameter>type</parameter>. As a
- special case, <parameter>p</parameter> may be
- <constant>NULL</constant>, if <parameter>size</parameter> is 0.
- </para>
-
- <para>The memory pointed at by <parameter>p</parameter> is copied
- into the memory area containing the message and may be changed
- after this call.</para>
-
- <para>The
- <function>sd_bus_message_append_array_memfd</function> function appends
- items to message <parameter>m</parameter>, similarly to
- <function>sd_bus_message_append_array</function>. Contents of the
- memory file descriptor <parameter>memfd</parameter> are used as
- the contents of the array. Their size must be a multiple of the
- size of the type <parameter>type</parameter>.</para>
-
- <para>The descriptor specified with <parameter>memfd</parameter>
- will be sealed and cannot be modified after this call.</para>
-
- <para>The
- <function>sd_bus_message_append_array_iovec</function> function appends
- items to message <parameter>m</parameter>, similarly to
- <function>sd_bus_message_append_array</function>. Contents of the
- iovec <parameter>iov</parameter> are used as the contents of the
- array. The total size of <parameter>iov</parameter> payload (the
- sum of <structfield>iov_len</structfield> fields) must be a multiple
- of the size of the type <parameter>type</parameter>.</para>
-
- <para>The <parameter>iov</parameter> argument must point to
- <parameter>n</parameter> <structname>struct iovec</structname>
- structures. Each structure may have the
- <structname>iov_base</structname> field set, in which case the
- memory pointed to will be copied into the message, or unset, in
- which case a block of zeros of length
- <structname>iov_len</structname> bytes will be inserted. The
- memory pointed at by <parameter>iov</parameter> may be changed
- after this call.</para>
-
- <para>The
- <function>sd_bus_message_append_array_space</function> function appends
- space for an array of items to message <parameter>m</parameter>.
- It behaves the same as
- <function>sd_bus_message_append_array</function>, but instead
- of copying items to the message, it returns a pointer to the
- destination area to the caller in pointer <parameter>p</parameter>.
- </para>
- </refsect1>
-
- <refsect1>
- <title>Return Value</title>
-
- <para>On success, these calls return 0 or a positive integer. On
- failure, they returns a negative errno-style error code.</para>
- </refsect1>
-
- <xi:include href="sd_bus_message_append_basic.xml" xpointer="errors" />
-
- <refsect1>
- <title>Notes</title>
-
- <para><function>sd_bus_append_array()</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_message_append</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_bus_message_append_basic</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <ulink url="http://dbus.freedesktop.org/doc/dbus-specification.html">The D-Bus specification</ulink>
- </para>
- </refsect1>
-
-</refentry>