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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 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() opera-
       tion. 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 unsuc-
       cessfully, 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.1-2008, <aio.h>
COPYRIGHT
       Portions  of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri-
       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  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.unix.org/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.ker-
       nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                  2013                        AIO_ERROR(3P)