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AIO_FSYNC(3)		   Linux Programmer's Manual		  AIO_FSYNC(3)

NAME
       aio_fsync - asynchronous file synchronization

SYNOPSIS
       #include <aio.h>

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

       Link with -lrt.

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 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
       ignored.

RETURN VALUE
       On  success  (the  sync	request was successfully queued) this function
       returns 0.  On error, -1 is returned, and errno is set appropriately.

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.

VERSIONS
       The aio_fsync() function is available since glibc 2.1.

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

       ┌────────────┬───────────────┬─────────┐
       │Interface   │ Attribute	    │ Value   │
       ├────────────┼───────────────┼─────────┤
       │aio_fsync() │ Thread safety │ MT-Safe │
       └────────────┴───────────────┴─────────┘
CONFORMING TO
       POSIX.1-2001, POSIX.1-2008.

SEE ALSO
       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)

COLOPHON
       This  page  is  part of release 4.14 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest	  version     of     this    page,    can    be	   found    at
       https://www.kernel.org/doc/man-pages/.

				  2017-09-15			  AIO_FSYNC(3)

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