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.\" ======================================================================== |
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.\" |
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.IX Title "ERR_get_error 3" |
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.TH ERR_get_error 3 "2018-11-20" "1.0.2q" "OpenSSL" |
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes |
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.\" way too many mistakes in technical documents. |
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.if n .ad l |
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.nh |
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.SH "NAME" |
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ERR_get_error, ERR_peek_error, ERR_peek_last_error, |
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ERR_get_error_line, ERR_peek_error_line, ERR_peek_last_error_line, |
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ERR_get_error_line_data, ERR_peek_error_line_data, |
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ERR_peek_last_error_line_data \- obtain error code and data |
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.SH "SYNOPSIS" |
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.IX Header "SYNOPSIS" |
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.Vb 1 |
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\& #include <openssl/err.h> |
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\& |
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\& unsigned long ERR_get_error(void); |
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\& unsigned long ERR_peek_error(void); |
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\& unsigned long ERR_peek_last_error(void); |
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\& |
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\& unsigned long ERR_get_error_line(const char **file, int *line); |
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\& unsigned long ERR_peek_error_line(const char **file, int *line); |
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\& unsigned long ERR_peek_last_error_line(const char **file, int *line); |
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\& |
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\& unsigned long ERR_get_error_line_data(const char **file, int *line, |
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\& const char **data, int *flags); |
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\& unsigned long ERR_peek_error_line_data(const char **file, int *line, |
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\& const char **data, int *flags); |
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\& unsigned long ERR_peek_last_error_line_data(const char **file, int *line, |
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\& const char **data, int *flags); |
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.Ve |
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.SH "DESCRIPTION" |
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.IX Header "DESCRIPTION" |
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\&\fIERR_get_error()\fR returns the earliest error code from the thread's error |
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queue and removes the entry. This function can be called repeatedly |
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until there are no more error codes to return. |
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.PP |
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\&\fIERR_peek_error()\fR returns the earliest error code from the thread's |
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error queue without modifying it. |
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.PP |
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\&\fIERR_peek_last_error()\fR returns the latest error code from the thread's |
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error queue without modifying it. |
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.PP |
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See \s-1\fIERR_GET_LIB\s0\fR\|(3) for obtaining information about |
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location and reason of the error, and |
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\&\fIERR_error_string\fR\|(3) for human-readable error |
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messages. |
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.PP |
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\&\fIERR_get_error_line()\fR, \fIERR_peek_error_line()\fR and |
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\&\fIERR_peek_last_error_line()\fR are the same as the above, but they |
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additionally store the file name and line number where |
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the error occurred in *\fBfile\fR and *\fBline\fR, unless these are \fB\s-1NULL\s0\fR. |
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.PP |
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\&\fIERR_get_error_line_data()\fR, \fIERR_peek_error_line_data()\fR and |
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\&\fIERR_peek_last_error_line_data()\fR store additional data and flags |
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associated with the error code in *\fBdata\fR |
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and *\fBflags\fR, unless these are \fB\s-1NULL\s0\fR. *\fBdata\fR contains a string |
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if *\fBflags\fR&\fB\s-1ERR_TXT_STRING\s0\fR is true. |
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.PP |
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An application \fB\s-1MUST NOT\s0\fR free the *\fBdata\fR pointer (or any other pointers |
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returned by these functions) with \fIOPENSSL_free()\fR as freeing is handled |
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automatically by the error library. |
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.SH "RETURN VALUES" |
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.IX Header "RETURN VALUES" |
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The error code, or 0 if there is no error in the queue. |
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.SH "SEE ALSO" |
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.IX Header "SEE ALSO" |
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\&\fIerr\fR\|(3), \fIERR_error_string\fR\|(3), |
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\&\s-1\fIERR_GET_LIB\s0\fR\|(3) |
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.SH "HISTORY" |
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.IX Header "HISTORY" |
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\&\fIERR_get_error()\fR, \fIERR_peek_error()\fR, \fIERR_get_error_line()\fR and |
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\&\fIERR_peek_error_line()\fR are available in all versions of SSLeay and |
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OpenSSL. \fIERR_get_error_line_data()\fR and \fIERR_peek_error_line_data()\fR |
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were added in SSLeay 0.9.0. |
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\&\fIERR_peek_last_error()\fR, \fIERR_peek_last_error_line()\fR and |
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\&\fIERR_peek_last_error_line_data()\fR were added in OpenSSL 0.9.7. |
