PROLOG

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.

NAME

       aio_error — retrieve errors status for an asynchronous I/O operation

SYNOPSIS

       #include <aio.h>

       int aio_error(const struct aiocb *aiocbp);

DESCRIPTION

       The  aio_error() function shall return the error status associated with the aiocb structure referenced by
       the aiocbp argument. The error status for an asynchronous I/O operation is the errno value that would  be
       set by the corresponding read(), write(), fdatasync(), or fsync() operation. If the operation has not yet
       completed, then the error status shall be equal to [EINPROGRESS].

       If  the aiocb structure pointed to by aiocbp is not associated with an operation that has been scheduled,
       the results are undefined.

RETURN VALUE

       If the asynchronous I/O  operation  has  completed  successfully,  then  0  shall  be  returned.  If  the
       asynchronous  operation  has  completed  unsuccessfully,  then the error status, as described for read(),
       write(), fdatasync(), and fsync(), shall be returned. If the  asynchronous  I/O  operation  has  not  yet
       completed, then [EINPROGRESS] shall be returned.

       If the aio_error() function fails, it shall return -1 and set errno to indicate the error.

ERRORS

       The aio_error() function may fail if:

       EINVAL The  aiocbp  argument  does not refer to an asynchronous operation whose return status has not yet
              been retrieved.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       aio_cancel(), aio_fsync(), aio_read(), aio_return(), aio_write(), close(), exec, exit(), fork(),
       lio_listio(), lseek(), read()

       The Base Definitions volume of POSIX.1‐2017, <aio.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group  Base
       Specifications  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any discrepancy between this version and the original
       IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee  document.
       The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

       Any  typographical  or formatting errors that appear in this page are most likely to have been introduced
       during  the  conversion  of  the  source  files  to  man  page  format.  To  report  such   errors,   see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2017                                     AIO_ERROR(3POSIX)