1=pod
2
3=head1 NAME
4
5ERR_GET_LIB, ERR_GET_FUNC, ERR_GET_REASON, ERR_FATAL_ERROR
6- get information from error codes
7
8=head1 SYNOPSIS
9
10 #include <openssl/err.h>
11
12 int ERR_GET_LIB(unsigned long e);
13
14 int ERR_GET_FUNC(unsigned long e);
15
16 int ERR_GET_REASON(unsigned long e);
17
18 int ERR_FATAL_ERROR(unsigned long e);
19
20=head1 DESCRIPTION
21
22The error code returned by ERR_get_error() consists of a library
23number, function code and reason code. ERR_GET_LIB(), ERR_GET_FUNC()
24and ERR_GET_REASON() can be used to extract these.
25
26ERR_FATAL_ERROR() indicates whether a given error code is a fatal error.
27
28The library number and function code describe where the error
29occurred, the reason code is the information about what went wrong.
30
31Each sub-library of OpenSSL has a unique library number; function and
32reason codes are unique within each sub-library.  Note that different
33libraries may use the same value to signal different functions and
34reasons.
35
36B<ERR_R_...> reason codes such as B<ERR_R_MALLOC_FAILURE> are globally
37unique. However, when checking for sub-library specific reason codes,
38be sure to also compare the library number.
39
40ERR_GET_LIB(), ERR_GET_FUNC(), ERR_GET_REASON(), and ERR_FATAL_ERROR()
41 are macros.
42
43=head1 RETURN VALUES
44
45The library number, function code, reason code, and whether the error
46is fatal, respectively.
47
48=head1 SEE ALSO
49
50L<ERR_get_error(3)>
51
52=head1 HISTORY
53
54ERR_GET_LIB(), ERR_GET_FUNC() and ERR_GET_REASON() are available in
55all versions of OpenSSL.
56
57=head1 COPYRIGHT
58
59Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
60
61Licensed under the OpenSSL license (the "License").  You may not use
62this file except in compliance with the License.  You can obtain a copy
63in the file LICENSE in the source distribution or at
64L<https://www.openssl.org/source/license.html>.
65
66=cut
67