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version: tip
layout: manpage_v2
title: nn_close(3compat)
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<h1>nn_close(3compat)</h1>
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<h2 id="_name">NAME</h2>
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<p>nn_close - close socket (compatible API)</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;nanomsg/nn.h&gt;</span>

<span class="tok-kt">int</span><span class="tok-w"> </span><span class="tok-nf">nn_close</span><span class="tok-p">(</span><span class="tok-kt">int</span><span class="tok-w"> </span><span class="tok-n">sock</span><span class="tok-p">);</span></code></pre>
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<h2 id="_description">DESCRIPTION</h2>
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<p>The <code>nn_close()</code> function closes the socket <em>sock</em>.
Any operations that are currently in progress will be terminated, and will
fail with error <code>EBADF</code>.</p>
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This function is provided for API
<a href="nng_compat.3compat.html">compatibility</a> with legacy <em>libnanomsg</em>.
Consider using the relevant <a href="libnng.3.html">modern API</a> instead.
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<h2 id="_return_values">RETURN VALUES</h2>
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<p>This function returns zero on success, and -1 on failure.</p>
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<h2 id="_errors">ERRORS</h2>
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<code>EBADF</code>
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<p>The socket is not open.</p>
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<code>ETERM</code>
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<p>The library is shutting down.</p>
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<h2 id="_see_also">SEE ALSO</h2>
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<p><a href="nn_errno.3compat.html">nn_errno(3compat)</a>,
<a href="nn_socket.3compat.html">nn_socket(3compat)</a>,
<a href="nng_compat.3compat.html">nng_compat(3compat)</a>,
<a href="nng.7.html">nng(7)</a></p>
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