focal (3) aio_error.3posix.gz

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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.1‐2008, <aio.h>


       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 Electrical 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.kernel.org/doc/man-pages/reporting_bugs.html .