aio_error - get error status of asynchronous I/O operation
int aio_error(const struct aiocb
This function returns one of the following:
EINPROGRESS, if the request has not been completed yet.
ECANCELED, if the request was canceled.
0, if the request completed successfully.
A positive error number, if the asynchronous I/O operation
failed. This is the same value that would have been stored in the
errno variable in the case of a synchronous
fsync(2), or fdatasync(2)
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