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aio_return — retrieve return status of asynchronous I/O operation (REALTIME)
Standard C Library (libc, -lc)
#include <aio.h> ssize_t aio_return(struct aiocb *iocb);
The aio_return() system call returns the final status of the asynchronous I/O request associated with the structure pointed to by iocb. 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(2) returns something other than EINPROGRESS).
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.
The aio_return() system call will fail if: [EINVAL] The iocb argument does not reference a completed asynchronous I/O request.
aio_cancel(2), aio_error(2), aio_suspend(2), aio_waitcomplete(2), aio_write(2), fsync(2), read(2), write(2), aio(4)
The aio_return() system call is expected to conform to the IEEE Std 1003.1 (“POSIX.1”) standard.
The aio_return() system call first appeared in FreeBSD 3.0.
This manual page was written by Wes Peters <firstname.lastname@example.org>.