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 +<div id="header">
 +<h1>
 +zmq_msg_copy(3) Manual Page
 +</h1>
 +<h2>NAME</h2>
 +<div class="sectionbody">
 +<p>zmq_msg_copy -
 +   copy content of a message to another message
 +</p>
 +</div>
 +</div>
 +<div id="content">
 +<div class="sect1">
 +<h2 id="_synopsis">SYNOPSIS</h2>
 +<div class="sectionbody">
 +<div class="paragraph"><p><strong>int zmq_msg_copy (zmq_msg_t <em>*dest</em>, zmq_msg_t <em>*src</em>);</strong></p></div>
 +</div>
 +</div>
 +<div class="sect1">
 +<h2 id="_description">DESCRIPTION</h2>
 +<div class="sectionbody">
 +<div class="paragraph"><p>The <em>zmq_msg_copy()</em> function shall copy the message object referenced by <em>src</em>
 +to the message object referenced by <em>dest</em>. The original content of <em>dest</em>, if
 +any, shall be released.</p></div>
 +<div class="admonitionblock">
 +<table><tr>
 +<td class="icon">
 +<div class="title">Caution</div>
 +</td>
 +<td class="content">The implementation may choose not to physically copy the message
 +content, rather to share the underlying buffer between <em>src</em> and <em>dest</em>. Avoid
 +modifying message content after a message has been copied with
 +<em>zmq_msg_copy()</em>, doing so can result in undefined behaviour. If what you need
 +is an actual hard copy, allocate a new message using <em>zmq_msg_init_size()</em> and
 +copy the message content using <em>memcpy()</em>.</td>
 +</tr></table>
 +</div>
 +<div class="admonitionblock">
 +<table><tr>
 +<td class="icon">
 +<div class="title">Caution</div>
 +</td>
 +<td class="content">Never access <em>zmq_msg_t</em> members directly, instead always use the
 +<em>zmq_msg</em> family of functions.</td>
 +</tr></table>
 +</div>
 +</div>
 +</div>
 +<div class="sect1">
 +<h2 id="_return_value">RETURN VALUE</h2>
 +<div class="sectionbody">
 +<div class="paragraph"><p>The <em>zmq_msg_copy()</em> function shall return zero if successful. Otherwise it
 +shall return <tt>-1</tt> and set <em>errno</em> to one of the values defined below.</p></div>
 +</div>
 +</div>
 +<div class="sect1">
 +<h2 id="_errors">ERRORS</h2>
 +<div class="sectionbody">
 +<div class="dlist"><dl>
 +<dt class="hdlist1">
 +<strong>EFAULT</strong>
 +</dt>
 +<dd>
 +<p>
 +Invalid message.
 +</p>
 +</dd>
 +</dl></div>
 +</div>
 +</div>
 +<div class="sect1">
 +<h2 id="_see_also">SEE ALSO</h2>
 +<div class="sectionbody">
 +<div class="paragraph"><p><a href="zmq_msg_move.html">zmq_msg_move(3)</a>
 +<a href="zmq_msg_init.html">zmq_msg_init(3)</a>
 +<a href="zmq_msg_init_size.html">zmq_msg_init_size(3)</a>
 +<a href="zmq_msg_init_data.html">zmq_msg_init_data(3)</a>
 +<a href="zmq_msg_close.html">zmq_msg_close(3)</a>
 +<a href="zmq.html">zmq(7)</a></p></div>
 +</div>
 +</div>
 +<div class="sect1">
 +<h2 id="_authors">AUTHORS</h2>
 +<div class="sectionbody">
 +<div class="paragraph"><p>This page was written by the ØMQ community. To make a change please
 +read the ØMQ Contribution Policy at <a href="http://www.zeromq.org/docs:contributing">http://www.zeromq.org/docs:contributing</a>.</p></div>
 +</div>
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 +ØMQ 4.0.4<br />
 +Last updated 2013-11-13 18:57:50 CET
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