NetBSD/lib/libcrypto/man/ERR_get_error.3

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.TH ERR_get_error 3 "0.9.5a" "22/Jul/2000" "OpenSSL"
.UC
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.rm #[ #] #H #V #F C
.SH "NAME"
ERR_get_error, ERR_peek_error \- obtain error code
.SH "LIBRARY"
libcrypto, -lcrypto
.SH "SYNOPSIS"
.PP
.Vb 1
\& #include <openssl/err.h>
.Ve
.Vb 2
\& unsigned long ERR_get_error(void);
\& unsigned long ERR_peek_error(void);
.Ve
.Vb 2
\& unsigned long ERR_get_error_line(const char **file, int *line);
\& unsigned long ERR_peek_error_line(const char **file, int *line);
.Ve
.Vb 4
\& unsigned long ERR_get_error_line_data(const char **file, int *line,
\&         const char **data, int *flags);
\& unsigned long ERR_peek_error_line_data(const char **file, int *line,
\&         const char **data, int *flags);
.Ve
.SH "DESCRIPTION"
\fIERR_get_error()\fR returns the last error code from the thread's error
queue and removes the entry. This function can be called repeatedly
until there are no more error codes to return.
.PP
\fIERR_peek_error()\fR returns the last error code from the thread's
error queue without modifying it.
.PP
See the \fIERR_GET_LIB(3)|ERR_GET_LIB(3)\fR manpage for obtaining information about
location and reason of the error, and
the \fIERR_error_string(3)|ERR_error_string(3)\fR manpage for human-readable error
messages.
.PP
\fIERR_get_error_line()\fR and \fIERR_peek_error_line()\fR are the same as the
above, but they additionally store the file name and line number where
the error occurred in *\fBfile\fR and *\fBline\fR, unless these are \fBNULL\fR.
.PP
\fIERR_get_error_line_data()\fR and \fIERR_peek_error_line_data()\fR store
additional data and flags associated with the error code in *\fBdata\fR
and *\fBflags\fR, unless these are \fBNULL\fR. *\fBdata\fR contains a string
if *\fBflags\fR&\fBERR_TXT_STRING\fR. If it has been allocated by \fIMalloc()\fR,
*\fBflags\fR&\fBERR_TXT_MALLOCED\fR is true.
.SH "RETURN VALUES"
The error code, or 0 if there is no error in the queue.
.SH "SEE ALSO"
the \fIerr(3)|err(3)\fR manpage, the \fIERR_error_string(3)|ERR_error_string(3)\fR manpage,
the \fIERR_GET_LIB(3)|ERR_GET_LIB(3)\fR manpage
.SH "HISTORY"
\fIERR_get_error()\fR, \fIERR_peek_error()\fR, \fIERR_get_error_line()\fR and
\fIERR_peek_error_line()\fR are available in all versions of SSLeay and
OpenSSL. \fIERR_get_error_line_data()\fR and \fIERR_peek_error_line_data()\fR
were added in SSLeay 0.9.0.

.rn }` ''
.IX Title "ERR_get_error 3"
.IX Name "ERR_get_error, ERR_peek_error - obtain error code"

.IX Header "NAME"

.IX Header "SYNOPSIS"

.IX Header "DESCRIPTION"

.IX Header "RETURN VALUES"

.IX Header "SEE ALSO"

.IX Header "HISTORY"