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<title>ERR_GET_LIB</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="#RETURN-VALUES">RETURN VALUES</a></li>
<li><a href="#SEE-ALSO">SEE ALSO</a></li>
<li><a href="#HISTORY">HISTORY</a></li>
<li><a href="#COPYRIGHT">COPYRIGHT</a></li>
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<h1 id="NAME">NAME</h1>
<p>ERR_GET_LIB, ERR_GET_FUNC, ERR_GET_REASON, ERR_FATAL_ERROR - get information from error codes</p>
<h1 id="SYNOPSIS">SYNOPSIS</h1>
<pre><code> #include <openssl/err.h>
int ERR_GET_LIB(unsigned long e);
int ERR_GET_FUNC(unsigned long e);
int ERR_GET_REASON(unsigned long e);
int ERR_FATAL_ERROR(unsigned long e);</code></pre>
<h1 id="DESCRIPTION">DESCRIPTION</h1>
<p>The error code returned by ERR_get_error() consists of a library number, function code and reason code. ERR_GET_LIB(), ERR_GET_FUNC() and ERR_GET_REASON() can be used to extract these.</p>
<p>ERR_FATAL_ERROR() indicates whether a given error code is a fatal error.</p>
<p>The library number and function code describe where the error occurred, the reason code is the information about what went wrong.</p>
<p>Each sub-library of OpenSSL has a unique library number; function and reason codes are unique within each sub-library. Note that different libraries may use the same value to signal different functions and reasons.</p>
<p><b>ERR_R_...</b> reason codes such as <b>ERR_R_MALLOC_FAILURE</b> are globally unique. However, when checking for sub-library specific reason codes, be sure to also compare the library number.</p>
<p>ERR_GET_LIB(), ERR_GET_FUNC(), ERR_GET_REASON(), and ERR_FATAL_ERROR() are macros.</p>
<h1 id="RETURN-VALUES">RETURN VALUES</h1>
<p>The library number, function code, reason code, and whether the error is fatal, respectively.</p>
<h1 id="SEE-ALSO">SEE ALSO</h1>
<p><a href="../man3/ERR_get_error.html">ERR_get_error(3)</a></p>
<h1 id="HISTORY">HISTORY</h1>
<p>ERR_GET_LIB(), ERR_GET_FUNC() and ERR_GET_REASON() are available in all versions of OpenSSL.</p>
<h1 id="COPYRIGHT">COPYRIGHT</h1>
<p>Copyright 2000-2017 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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