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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_listio()  ,  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,  Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications 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
       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 .