ERR_GET_LIB, ERR_GET_FUNC, ERR_GET_REASON - get library, function and reason
int ERR_GET_LIB(unsigned long e);
int ERR_GET_FUNC(unsigned long e);
int ERR_GET_REASON(unsigned long e);
The error code returned by ERR_get_error()
consists of a library number,
function code and reason code. ERR_GET_LIB()
can be used to extract these.
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.
reason codes such as ERR_R_MALLOC_FAILURE
unique. However, when checking for sub-library specific reason codes, be sure
to also compare the library number.
The library number, function code and reason code respectively.
available in all versions of SSLeay and OpenSSL.