#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);
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.
ERR_FATAL_ERROR() indicates whether a given error code is a fatal error.
The library number and function code describe where the error occurred, the reason code is the information about what went wrong.
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.
ERR_R_... reason codes such as ERR_R_MALLOC_FAILURE are globally unique. However, when checking for sub-library specific reason codes, be sure to also compare the library number.
ERR_GET_LIB(), ERR_GET_FUNC(), ERR_GET_REASON(), and ERR_FATAL_ERROR()
The library number, function code, reason code, and whether the error is fatal, respectively.
ERR_GET_LIB(), ERR_GET_FUNC() and ERR_GET_REASON() are available in all versions of OpenSSL.
Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
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 <https://www.openssl.org/source/license.html>.
The man pages ERR_FATAL_ERROR.3ssl(3), ERR_GET_FUNC.3ssl(3) and ERR_GET_REASON.3ssl(3) are aliases of ERR_GET_LIB.3ssl(3).