aio_fsync(3)		    Library Functions Manual		    aio_fsync(3)

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	descrip-
     tion 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  asyn-
     chronous 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).
     allbox; lbx lb lb l l l.  Interface Attribute Value T{ aio_fsync()
     T}	  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)

Linux man-pages 6.18		   2026-02-08			    aio_fsync(3)