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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.

       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  --  this  call  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 No  synchronized  I/O  for  this file is supported, or op is not
              O_SYNC or O_DSYNC.

CONFORMING TO

       POSIX.1-2001.

SEE ALSO

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

COLOPHON

       This  page  is  part of release 3.27 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

                                  2010-09-19                      AIO_FSYNC(3)