openssl-prebuild/linux_amd64/ssl/share/doc/openssl/html/man3/BIO_s_null.html
2020-03-02 16:50:34 +00:00

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<title>BIO_s_null</title>
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<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><a name="name">NAME</a></h1>
<p>BIO_s_null - null data sink</p>
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<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
#include &lt;openssl/bio.h&gt;</pre>
<pre>
const BIO_METHOD *BIO_s_null(void);</pre>
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<h1><a name="description">DESCRIPTION</a></h1>
<p><code>BIO_s_null()</code> returns the null sink BIO method. Data written to
the null sink is discarded, reads return EOF.</p>
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</p>
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<h1><a name="notes">NOTES</a></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>
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<h1><a name="return_values">RETURN VALUES</a></h1>
<p><code>BIO_s_null()</code> returns the null sink BIO method.</p>
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<h1><a name="copyright">COPYRIGHT</a></h1>
<p>Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.</p>
<p>Licensed under the Apache License 2.0 (the &quot;License&quot;). 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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