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title: nng_msg_dup(3)
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<h1>nng_msg_dup(3)</h1>
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<h2 id="_name">NAME</h2>
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<p>nng_msg_dup - duplicate a message</p>
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<h2 id="_synopsis">SYNOPSIS</h2>
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<pre class="pygments highlight"><code data-lang="c"><span></span><span class="tok-cp">#include</span><span class="tok-w"> </span><span class="tok-cpf">&lt;nng/nng.h&gt;</span>

<span class="tok-kt">int</span><span class="tok-w"> </span><span class="tok-nf">nng_msg_dup</span><span class="tok-p">(</span><span class="tok-n">nng_msg</span><span class="tok-w"> </span><span class="tok-o">**</span><span class="tok-n">dup</span><span class="tok-p">,</span><span class="tok-w"> </span><span class="tok-n">nng_msg_t</span><span class="tok-w"> </span><span class="tok-o">*</span><span class="tok-n">orig</span><span class="tok-p">);</span></code></pre>
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<h2 id="_description">DESCRIPTION</h2>
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<p>The <code>nng_msg_dup()</code> makes a duplicate of the original message <em>orig</em>, and
saves the result in the location pointed by <em>dup</em>.
The actual message body and header content is copied,
but the duplicate may contain a
different amount of unused space than the original message.</p>
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<h2 id="_return_values">RETURN VALUES</h2>
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<p>This function returns 0 on success, and non-zero otherwise.</p>
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<h2 id="_errors">ERRORS</h2>
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<code>NNG_ENOMEM</code>
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<p>Insufficient free memory exists to duplicate a message.</p>
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<h2 id="_see_also">SEE ALSO</h2>
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<p><a href="nng_msg_alloc.3.html">nng_msg_alloc(3)</a>,
<a href="nng_msg_free.3.html">nng_msg_free(3)</a>,
<a href="nng_strerror.3.html">nng_strerror(3)</a>,
<a href="nng_msg.5.html">nng_msg(5)</a>,
<a href="nng.7.html">nng(7)</a></p>
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