AIO_RETURN(3)AIO_RETURN(3)NAME
aio_return, aio_return64 - return error status of an asynchronous I/O
operation
C SYNOPSIS
#include <aio.h>
ssize_t aio_return(aiocb_t *aiocbp);
ssize_t aio_return64(aiocb64_t *aiocbp);
DESCRIPTION
The aio_return() function returns the return status associated with the
aiocbp passed in. The return status for an asynchronous I/O operation is
the value that would be returned by the corresponding read(2) or write(2)
or fsync(2) operation. If the error status for the operation is equal to
EINPROGRESS, then the return status for the operation is undefined.
The aio_return() function may be called exactly once to retrieve the
return status of a given asynchronous operation; thereafter, if the same
aiocb structure is used in a call to aio_return() or aio_error(), an
error may be returned.
The aio_return64() function is identical to aio_return() except that it
takes an aiocb64_t * (see <aio.h>). This structure allows for the
specification of a file offset greater than 2 Gigabytes.
SEE ALSOaio_read(3), aio_write(3), lio_listio(3), aio_error(3), aio_cancel(3),
aio_sgi_init(3), read(2), lseek(2), close(2),_exit(2), exec(2), fork(2).
DIAGNOSTICS
If the asynchronous I/O operation has completed, then the return status,
as described for read(2), write(2), and fsync(2) shall be returned. If
the asynchronous operation has not yet completed, then the results of
aio_return() are undefined.
If any of the conditions below occur, the aio_return() function shall
return -1 and set errno to the corresponding value.
[EINVAL] The aiocbp argument refers to an asynchronous operation
whose return status has already been retrieved.
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