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135 .\" ========================================================================
137 .IX Title "ERR_get_error 3"
138 .TH ERR_get_error 3 "2014-08-10" "1.0.1n" "OpenSSL"
139 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
140 .\" way too many mistakes in technical documents.
144 ERR_get_error, ERR_peek_error, ERR_peek_last_error,
145 ERR_get_error_line, ERR_peek_error_line, ERR_peek_last_error_line,
146 ERR_get_error_line_data, ERR_peek_error_line_data,
147 ERR_peek_last_error_line_data \- obtain error code and data
151 .IX Header "SYNOPSIS"
153 \& #include <openssl/err.h>
155 \& unsigned long ERR_get_error(void);
156 \& unsigned long ERR_peek_error(void);
157 \& unsigned long ERR_peek_last_error(void);
159 \& unsigned long ERR_get_error_line(const char **file, int *line);
160 \& unsigned long ERR_peek_error_line(const char **file, int *line);
161 \& unsigned long ERR_peek_last_error_line(const char **file, int *line);
163 \& unsigned long ERR_get_error_line_data(const char **file, int *line,
164 \& const char **data, int *flags);
165 \& unsigned long ERR_peek_error_line_data(const char **file, int *line,
166 \& const char **data, int *flags);
167 \& unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
168 \& const char **data, int *flags);
171 .IX Header "DESCRIPTION"
172 \&\fIERR_get_error()\fR returns the earliest error code from the thread's error
173 queue and removes the entry. This function can be called repeatedly
174 until there are no more error codes to return.
176 \&\fIERR_peek_error()\fR returns the earliest error code from the thread's
177 error queue without modifying it.
179 \&\fIERR_peek_last_error()\fR returns the latest error code from the thread's
180 error queue without modifying it.
182 See \s-1\fIERR_GET_LIB\s0\fR\|(3) for obtaining information about
183 location and reason of the error, and
184 \&\fIERR_error_string\fR\|(3) for human-readable error
187 \&\fIERR_get_error_line()\fR, \fIERR_peek_error_line()\fR and
188 \&\fIERR_peek_last_error_line()\fR are the same as the above, but they
189 additionally store the file name and line number where
190 the error occurred in *\fBfile\fR and *\fBline\fR, unless these are \fB\s-1NULL\s0\fR.
192 \&\fIERR_get_error_line_data()\fR, \fIERR_peek_error_line_data()\fR and
193 \&\fIERR_peek_last_error_line_data()\fR store additional data and flags
194 associated with the error code in *\fBdata\fR
195 and *\fBflags\fR, unless these are \fB\s-1NULL\s0\fR. *\fBdata\fR contains a string
196 if *\fBflags\fR&\fB\s-1ERR_TXT_STRING\s0\fR is true.
198 An application \fB\s-1MUST NOT\s0\fR free the *\fBdata\fR pointer (or any other pointers
199 returned by these functions) with \fIOPENSSL_free()\fR as freeing is handled
200 automatically by the error library.
202 .IX Header "RETURN VALUES"
203 The error code, or 0 if there is no error in the queue.
205 .IX Header "SEE ALSO"
206 \&\fIopenssl_err\fR\|(3), \fIERR_error_string\fR\|(3),
207 \&\s-1\fIERR_GET_LIB\s0\fR\|(3)
210 \&\fIERR_get_error()\fR, \fIERR_peek_error()\fR, \fIERR_get_error_line()\fR and
211 \&\fIERR_peek_error_line()\fR are available in all versions of SSLeay and
212 OpenSSL. \fIERR_get_error_line_data()\fR and \fIERR_peek_error_line_data()\fR
213 were added in SSLeay 0.9.0.
214 \&\fIERR_peek_last_error()\fR, \fIERR_peek_last_error_line()\fR and
215 \&\fIERR_peek_last_error_line_data()\fR were added in OpenSSL 0.9.7.