AIO_ERROR(3POSIX)

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 .