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<p><a name="__index__"></a></p>

<ul>

	<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="#copyright">COPYRIGHT</a></li>
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<p>
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<h1><a name="name">NAME</a></h1>
<p>ERR_get_error, ERR_peek_error, ERR_peek_last_error,
ERR_get_error_line, ERR_peek_error_line, ERR_peek_last_error_line,
ERR_get_error_line_data, ERR_peek_error_line_data,
ERR_peek_last_error_line_data - obtain error code and data</p>
<p>
</p>
<hr />
<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
 #include &lt;openssl/err.h&gt;</pre>
<pre>
 unsigned long ERR_get_error(void);
 unsigned long ERR_peek_error(void);
 unsigned long ERR_peek_last_error(void);</pre>
<pre>
 unsigned long ERR_get_error_line(const char **file, int *line);
 unsigned long ERR_peek_error_line(const char **file, int *line);
 unsigned long ERR_peek_last_error_line(const char **file, int *line);</pre>
<pre>
 unsigned long ERR_get_error_line_data(const char **file, int *line,
                                       const char **data, int *flags);
 unsigned long ERR_peek_error_line_data(const char **file, int *line,
                                        const char **data, int *flags);
 unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
                                             const char **data, int *flags);</pre>
<p>
</p>
<hr />
<h1><a name="description">DESCRIPTION</a></h1>
<p><code>ERR_get_error()</code> returns the earliest error code from the thread's error
queue and removes the entry. This function can be called repeatedly
until there are no more error codes to return.</p>
<p><code>ERR_peek_error()</code> returns the earliest error code from the thread's
error queue without modifying it.</p>
<p><code>ERR_peek_last_error()</code> returns the latest error code from the thread's
error queue without modifying it.</p>
<p>See <em>ERR_GET_LIB(3)</em> for obtaining information about
location and reason of the error, and
<em>ERR_error_string(3)</em> for human-readable error
messages.</p>
<p><code>ERR_get_error_line()</code>, <code>ERR_peek_error_line()</code> and
<code>ERR_peek_last_error_line()</code> are the same as the above, but they
additionally store the filename and line number where
the error occurred in *<strong>file</strong> and *<strong>line</strong>, unless these are <strong>NULL</strong>.</p>
<p><code>ERR_get_error_line_data()</code>, <code>ERR_peek_error_line_data()</code> and
<code>ERR_peek_last_error_line_data()</code> store additional data and flags
associated with the error code in *<strong>data</strong>
and *<strong>flags</strong>, unless these are <strong>NULL</strong>. *<strong>data</strong> contains a string
if *<strong>flags</strong>&amp;<strong>ERR_TXT_STRING</strong> is true.</p>
<p>An application <strong>MUST NOT</strong> free the *<strong>data</strong> pointer (or any other pointers
returned by these functions) with <code>OPENSSL_free()</code> as freeing is handled
automatically by the error library.</p>
<p>
</p>
<hr />
<h1><a name="return_values">RETURN VALUES</a></h1>
<p>The error code, or 0 if there is no error in the queue.</p>
<p>
</p>
<hr />
<h1><a name="see_also">SEE ALSO</a></h1>
<p><em>ERR_error_string(3)</em>,
<em>ERR_GET_LIB(3)</em></p>
<p>
</p>
<hr />
<h1><a name="copyright">COPYRIGHT</a></h1>
<p>Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.</p>
<p>Licensed under the OpenSSL license (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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