NAME
aio_error —
retrieve errors status for an asynchronous I/O operation
(REALTIME)
SYNOPSIS
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(3),
write(3), [SIO]
fdatasync(3), or fsync(3) 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(3), write(3), [SIO] fdatasync(3), and fsync(3), 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.
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(3), aio_fsync(3), aio_read(3), aio_return(3), aio_write(3), close(3), exec(3), exit(3), fork(3), lio_listio(3), lseek(3), read(3), the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <aio.h>
CHANGE HISTORY
First released in Issue 5. Included for alignment with the POSIX Realtime Extension.
Issue 6
The [ENOSYS] error condition has been removed as stubs need not be provided if an implementation does not support the Asynchronous Input and Output option.
The APPLICATION USAGE section is added.
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