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int aio_fsync(int op, struct aiocb *aiocbp);
Link with -lrt.
The aio_fsync() function does a sync on all outstanding asynchronous
I/O operations associated with aiocbp->aio_fildes. (See aio(7) for a
description of the aiocb structure.)
More precisely, if op is O_SYNC, then all currently queued I/O opera-
tions shall be completed as if by a call of fsync(2), and if op is
O_DSYNC, this call is the asynchronous analog of fdatasync(2).
Note that this is a request only; it does not wait for I/O completion.
Apart from aio_fildes, the only field in the structure pointed to by
aiocbp that is used by this call is the aio_sigevent field (a sigevent
structure, described in sigevent(7)), which indicates the desired type
of asynchronous notification at completion. All other fields are
On success (the sync request was successfully queued) this function
returns 0. On error, -1 is returned, and errno is set appropriately.
EAGAIN Out of resources.
EBADF aio_fildes is not a valid file descriptor open for writing.
EINVAL Synchronized I/O is not supported for this file, or op is not
O_SYNC or O_DSYNC.
ENOSYS aio_fsync() is not implemented.
The aio_fsync() function is available since glibc 2.1.
aio_cancel(3), aio_error(3), aio_read(3), aio_return(3), aio_sus-
pend(3), aio_write(3), lio_listio(3), aio(7), sigevent(7)