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<title>BIO_s_null</title>
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<ul id="index">
<li><a href="#NAME">NAME</a></li>
<li><a href="#SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#NOTES">NOTES</a></li>
<li><a href="#RETURN-VALUES">RETURN VALUES</a></li>
<li><a href="#COPYRIGHT">COPYRIGHT</a></li>
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<h1 id="NAME">NAME</h1>
<p>BIO_s_null - null data sink</p>
<h1 id="SYNOPSIS">SYNOPSIS</h1>
<pre><code> #include <openssl/bio.h>
const BIO_METHOD *BIO_s_null(void);</code></pre>
<h1 id="DESCRIPTION">DESCRIPTION</h1>
<p>BIO_s_null() returns the null sink BIO method. Data written to the null sink is discarded, reads return EOF.</p>
<h1 id="NOTES">NOTES</h1>
<p>A null sink BIO behaves in a similar manner to the Unix /dev/null device.</p>
<p>A null bio can be placed on the end of a chain to discard any data passed through it.</p>
<p>A null sink is useful if, for example, an application wishes to digest some data by writing through a digest bio but not send the digested data anywhere. Since a BIO chain must normally include a source/sink BIO this can be achieved by adding a null sink BIO to the end of the chain</p>
<h1 id="RETURN-VALUES">RETURN VALUES</h1>
<p>BIO_s_null() returns the null sink BIO method.</p>
<h1 id="COPYRIGHT">COPYRIGHT</h1>
<p>Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.</p>
<p>Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>
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