aio_fsync - asynchronous file synchronization

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ aio_fsync()                                                                 │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       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(3type)), which indicates the  desired
       type of asynchronous notification at completion.  All other fields are ignored.

EAGAIN Out of resources.

       EBADFaio_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.

       ENOSYSaio_fsync() is not implemented.

       glibc 2.1.  POSIX.1-2001.

       Real-time library (librt, -lrt)

       aio_fsync - asynchronous file synchronization

       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.

aio_cancel(3),  aio_error(3),  aio_read(3),  aio_return(3),  aio_suspend(3), aio_write(3), lio_listio(3),
       aio(7), sigevent(3type)

Linux man-pages 6.9.1                              2024-05-02                                       aio_fsync(3)

       POSIX.1-2008.

#include<aio.h>intaio_fsync(intop,structaiocb*aiocbp);