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133 .\" ========================================================================
135 .IX Title "ERR_GET_LIB 3"
136 .TH ERR_GET_LIB 3 "2016-09-22" "1.0.2i" "OpenSSL"
137 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
138 .\" way too many mistakes in technical documents.
142 ERR_GET_LIB, ERR_GET_FUNC, ERR_GET_REASON \- get library, function and
145 .IX Header "SYNOPSIS"
147 \& #include <openssl/err.h>
149 \& int ERR_GET_LIB(unsigned long e);
151 \& int ERR_GET_FUNC(unsigned long e);
153 \& int ERR_GET_REASON(unsigned long e);
156 .IX Header "DESCRIPTION"
157 The error code returned by \fIERR_get_error()\fR consists of a library
158 number, function code and reason code. \s-1\fIERR_GET_LIB\s0()\fR, \s-1\fIERR_GET_FUNC\s0()\fR
159 and \s-1\fIERR_GET_REASON\s0()\fR can be used to extract these.
161 The library number and function code describe where the error
162 occurred, the reason code is the information about what went wrong.
164 Each sub-library of OpenSSL has a unique library number; function and
165 reason codes are unique within each sub-library. Note that different
166 libraries may use the same value to signal different functions and
169 \&\fB\s-1ERR_R_...\s0\fR reason codes such as \fB\s-1ERR_R_MALLOC_FAILURE\s0\fR are globally
170 unique. However, when checking for sub-library specific reason codes,
171 be sure to also compare the library number.
173 \&\s-1\fIERR_GET_LIB\s0()\fR, \s-1\fIERR_GET_FUNC\s0()\fR and \s-1\fIERR_GET_REASON\s0()\fR are macros.
175 .IX Header "RETURN VALUES"
176 The library number, function code and reason code respectively.
178 .IX Header "SEE ALSO"
179 \&\fIerr\fR\|(3), \fIERR_get_error\fR\|(3)
182 \&\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
183 all versions of SSLeay and OpenSSL.