NAME

       aio_fsync - asynchronous file synchronization

LIBRARY

       Real-time library (librt, -lrt)

SYNOPSIS

       #include <aio.h>

       int aio_fsync(int op, struct aiocb *aiocbp);

DESCRIPTION

       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.

RETURN VALUE

       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.

ERRORS

       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.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       ┌───────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │Interface                                                      │ Attribute     │ Value   │
       ├───────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │aio_fsync()                                                    │ Thread safety │ MT-Safe │
       └───────────────────────────────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       POSIX.1-2008.

HISTORY

       glibc 2.1.  POSIX.1-2001.

SEE ALSO

       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)