190 lines
5.9 KiB
Groff
Executable File
190 lines
5.9 KiB
Groff
Executable File
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.\" ========================================================================
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.\"
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.IX Title "ERR_GET_LIB 3"
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.TH ERR_GET_LIB 3 "2020-03-02" "3.0.0-dev" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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ERR_GET_LIB, ERR_GET_FUNC, ERR_GET_REASON, ERR_FATAL_ERROR
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\&\- get information from error codes
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/err.h>
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\&
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\& int ERR_GET_LIB(unsigned long e);
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\&
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\& int ERR_GET_FUNC(unsigned long e);
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\&
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\& int ERR_GET_REASON(unsigned long e);
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\&
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\& int ERR_FATAL_ERROR(unsigned long e);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The error code returned by \fIERR_get_error()\fR consists of a library
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number, function code and reason code. \s-1\fIERR_GET_LIB\s0()\fR, \s-1\fIERR_GET_FUNC\s0()\fR
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and \s-1\fIERR_GET_REASON\s0()\fR can be used to extract these.
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.PP
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\&\s-1\fIERR_FATAL_ERROR\s0()\fR indicates whether a given error code is a fatal error.
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.PP
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The library number and function code describe where the error
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occurred, the reason code is the information about what went wrong.
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.PP
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Each sub-library of OpenSSL has a unique library number; function and
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reason codes are unique within each sub-library. Note that different
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libraries may use the same value to signal different functions and
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reasons.
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.PP
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\&\fB\s-1ERR_R_\s0...\fR reason codes such as \fB\s-1ERR_R_MALLOC_FAILURE\s0\fR are globally
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unique. However, when checking for sub-library specific reason codes,
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be sure to also compare the library number.
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.PP
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\&\s-1\fIERR_GET_LIB\s0()\fR, \s-1\fIERR_GET_FUNC\s0()\fR, \s-1\fIERR_GET_REASON\s0()\fR, and \s-1\fIERR_FATAL_ERROR\s0()\fR
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are macros.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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The library number, function code, reason code, and whether the error
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is fatal, respectively.
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Starting with OpenSSL 3.0.0, the function code is always set to zero.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIERR_get_error\fR\|(3)
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.SH "HISTORY"
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.IX Header "HISTORY"
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\&\s-1\fIERR_GET_LIB\s0()\fR, \s-1\fIERR_GET_FUNC\s0()\fR and \s-1\fIERR_GET_REASON\s0()\fR are available in
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all versions of OpenSSL.
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2000\-2017 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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