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129 .\" ========================================================================
130 .\"
131 .IX Title "ERR_GET_LIB 3"
132 .TH ERR_GET_LIB 3 "2009-07-23" "0.9.8k" "OpenSSL"
133 .SH "NAME"
134 ERR_GET_LIB, ERR_GET_FUNC, ERR_GET_REASON \- get library, function and
135 reason code
136 .SH "SYNOPSIS"
137 .IX Header "SYNOPSIS"
138 .Vb 1
139 \& #include <openssl/err.h>
140 .Ve
141 .PP
142 .Vb 1
143 \& int ERR_GET_LIB(unsigned long e);
144 .Ve
145 .PP
146 .Vb 1
147 \& int ERR_GET_FUNC(unsigned long e);
148 .Ve
149 .PP
150 .Vb 1
151 \& int ERR_GET_REASON(unsigned long e);
152 .Ve
153 .SH "DESCRIPTION"
154 .IX Header "DESCRIPTION"
155 The error code returned by \fIERR_get_error()\fR consists of a library
156 number, function code and reason code. \s-1\fIERR_GET_LIB\s0()\fR, \s-1\fIERR_GET_FUNC\s0()\fR
157 and \s-1\fIERR_GET_REASON\s0()\fR can be used to extract these.
158 .PP
159 The library number and function code describe where the error
160 occurred, the reason code is the information about what went wrong.
161 .PP
162 Each sub-library of OpenSSL has a unique library number; function and
163 reason codes are unique within each sub\-library. Note that different
164 libraries may use the same value to signal different functions and
165 reasons.
166 .PP
167 \&\fB\s-1ERR_R_\s0...\fR reason codes such as \fB\s-1ERR_R_MALLOC_FAILURE\s0\fR are globally
168 unique. However, when checking for sub-library specific reason codes,
169 be sure to also compare the library number.
170 .PP
171 \&\s-1\fIERR_GET_LIB\s0()\fR, \s-1\fIERR_GET_FUNC\s0()\fR and \s-1\fIERR_GET_REASON\s0()\fR are macros.
172 .SH "RETURN VALUES"
173 .IX Header "RETURN VALUES"
174 The library number, function code and reason code respectively.
175 .SH "SEE ALSO"
176 .IX Header "SEE ALSO"
177 \&\fIerr\fR\|(3), \fIERR_get_error\fR\|(3)
178 .SH "HISTORY"
179 .IX Header "HISTORY"
180 \&\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
181 all versions of SSLeay and OpenSSL.