aio_fsync - asynchronous file synchronization
Real-time library (
librt,
-lrt)
#include <aio.h>
int aio_fsync(int op, struct aiocb *aiocbp);
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
operations 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 ignored.
On success (the sync request was successfully queued) this function returns 0.
On error, -1 is returned, and
errno is set to indicate the error.
- 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.
For an explanation of the terms used in this section, see
attributes(7).
Interface |
Attribute |
Value |
aio_fsync () |
Thread safety |
MT-Safe |
POSIX.1-2001, POSIX.1-2008.
aio_cancel(3),
aio_error(3),
aio_read(3),
aio_return(3),
aio_suspend(3),
aio_write(3),
lio_listio(3),
aio(7),
sigevent(7)