n the queue.</p>

<h1 id="RETURN-VALUES">RETURN VALUES</h1>

<p>ERR_error_string() returns a pointer to a static buffer containing the string if <i>buf</i> <b>== NULL</b>, <i>buf</i> otherwise.</p>

<p>ERR_lib_error_string() and ERR_reason_error_string() return the strings, and <b>NULL</b> if none is registered for the error code.</p>

<p>ERR_func_error_string() returns NULL.</p>

<h1 id="SEE-ALSO">SEE ALSO</h1>

<p><a href="../man3/ERR_get_error.html">ERR_get_error(3)</a>, <a href="../man3/ERR_print_errors