=pod
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=head1 NAME
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ERR_GET_LIB, ERR_GET_FUNC, ERR_GET_REASON - get library, function and
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reason code
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=head1 SYNOPSIS
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#include <openssl/err.h>
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int ERR_GET_LIB(unsigned long e);
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int ERR_GET_FUNC(unsigned long e);
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int ERR_GET_REASON(unsigned long e);
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=head1 DESCRIPTION
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The error code returned by ERR_get_error() consists of a library
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number, function code and reason code. ERR_GET_LIB(), ERR_GET_FUNC()
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and ERR_GET_REASON() can be used to extract these.
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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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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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B<ERR_R_...> reason codes such as B<ERR_R_MALLOC_FAILURE> 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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ERR_GET_LIB(), ERR_GET_FUNC() and ERR_GET_REASON() are macros.
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=head1 RETURN VALUES
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The library number, function code and reason code respectively.
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=head1 SEE ALSO
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L<err(3)|err(3)>, L<ERR_get_error(3)|ERR_get_error(3)>
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=head1 HISTORY
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ERR_GET_LIB(), ERR_GET_FUNC() and ERR_GET_REASON() are available in
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all versions of SSLeay and OpenSSL.
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=cut
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