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AIO_ERROR(3P)              POSIX Programmer's Manual             AIO_ERROR(3P)



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may dif-
       fer (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 (REALTIME)

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].

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.

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
       The aio_error() function is part of the Asynchronous Input and Output option and need not be available  on  all
       implementations.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       aio_cancel(),  aio_fsync(),  aio_read(),  aio_return(),  aio_write(), close(), exec(), exit(), fork(), lio_lis-
       tio(), lseek(), read() , the Base Definitions volume of IEEE Std 1003.1-2001, <aio.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Stan-
       dard  for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifica-
       tions Issue 6, Copyright (C) 2001-2003 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 Stan-
       dard, 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 .



IEEE/The Open Group                  2003                        AIO_ERROR(3P)