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AIO_RETURN(3) Library Functions Manual AIO_RETURN(3) NAME aio_return -- retrieve return status of asynchronous I/O operation (REALTIME) LIBRARY POSIX Real-time Library (librt, -lrt) SYNOPSIS #include <aio.h> ssize_t aio_return(struct aiocb *aiocbp); DESCRIPTION The aio_return() system call returns the final status of the asynchronous I/O request associated with the structure pointed to by aiocbp. The aio_return() system call should only be called once, to obtain the final status of an asynchronous I/O operation once it has completed (aio_error(3) returns something other than EINPROGRESS). RETURN VALUES If the asynchronous I/O request has completed, the status is returned as described in read(2), write(2), or fsync(2). Otherwise, aio_return() returns -1 and sets errno to indicate the error condition. ERRORS The aio_return() system call will fail if: [EINVAL] The aiocbp argument does not reference a completed asynchronous I/O request. SEE ALSO fsync(2), read(2), write(2), aio(3) STANDARDS The aio_return() system call is expected to conform to the IEEE Std 1003.1-2001 (``POSIX.1'') standard. HISTORY The aio_return() system call first appeared in NetBSD 5.0. NetBSD 7.1.2 August 13, 2011 NetBSD 7.1.2