Section (3) aio_return
aio_return — get return status of asynchronous I/O operation
||struct aiocb *aiocbp
returns the final return status for the asynchronous I/O
request with control block pointed to by
aiocbp. (See aio(7) for a description of
the aiocb structure.)
This function should be called only once for any given request, after aio_error(3) returns something other than EINPROGRESS.
If the asynchronous I/O operation has completed, this
function returns the value that would have been returned in
case of a synchronous read(2), write(2), fsync(2) or fdatasync(2), call. On
error, −1 is returned, and
errno is set appropriately.
If the asynchronous I/O operation has not yet completed,
the return value and effect of
aio_return() are undefined.
aiocbpdoes not point at a control block for an asynchronous I/O request of which the return status has not been retrieved yet.
aio_return() is not implemented.
For an explanation of the terms used in this section, see attributes(7).
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