ERR_GET_ERROR(3)           Library Functions Manual           ERR_GET_ERROR(3)

NAME
     ERR_get_error, ERR_peek_error, ERR_peek_last_error, ERR_get_error_line,
     ERR_peek_error_line, ERR_peek_last_error_line, ERR_get_error_line_data,
     ERR_peek_error_line_data, ERR_peek_last_error_line_data - obtain OpenSSL
     error code and data

SYNOPSIS
     #include <openssl/err.h>

     unsigned long
     ERR_get_error(void);

     unsigned long
     ERR_peek_error(void);

     unsigned long
     ERR_peek_last_error(void);

     unsigned long
     ERR_get_error_line(const char **file, int *line);

     unsigned long
     ERR_peek_error_line(const char **file, int *line);

     unsigned long
     ERR_peek_last_error_line(const char **file, int *line);

     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);

     unsigned long
     ERR_peek_last_error_line_data(const char **file, int *line,
         const char **data, int *flags);

DESCRIPTION
     ERR_get_error() returns the earliest 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.

     ERR_peek_error() returns the earliest error code from the thread's error
     queue without modifying it.

     ERR_peek_last_error() returns the latest error code from the thread's
     error queue without modifying it.

     See ERR_GET_LIB(3) for obtaining information about the location and
     reason for the error, and ERR_error_string(3) for human-readable error
     messages.

     ERR_get_error_line(), ERR_peek_error_line(), and
     ERR_peek_last_error_line() are the same as the above, but they
     additionally store the file name and line number where the error occurred
     in *file and *line, unless these are NULL.

     ERR_get_error_line_data(), ERR_peek_error_line_data(), and
     ERR_peek_last_error_line_data() store additional data and flags
     associated with the error code in *data and *flags, unless these are
     NULL.  *data contains a string if *flags&ERR_TXT_STRING is true.

     An application MUST NOT free the *data pointer (or any other pointers
     returned by these functions) with free(3) as freeing is handled
     automatically by the error library.

RETURN VALUES
     The error code, or 0 if there is no error in the queue.

SEE ALSO
     ERR(3), ERR_error_string(3), ERR_GET_LIB(3)

HISTORY
     ERR_get_error() and ERR_peek_error() first appeared in SSLeay 0.4.4.
     ERR_get_error_line() and ERR_peek_error_line() first appeared in SSLeay
     0.6.0.  ERR_get_error_line_data() and ERR_peek_error_line_data() first
     appeared in SSLeay 0.9.0.  All these functions have been available since
     OpenBSD 2.4.

     ERR_peek_last_error(), ERR_peek_last_error_line(), and
     ERR_peek_last_error_line_data() first appeared in OpenSSL 0.9.7 and have
     been available since OpenBSD 3.2.

Linux 6.8.2-arch2-1             March 27, 2018             Linux 6.8.2-arch2-1