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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.   (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(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 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.


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_suspend(3), aio_write(3),
       lio_listio(3), aio(7), sigevent(7)


COLOPHON
       This page is part of release 5.13 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/.

                                            2021-03-22                               AIO_FSYNC(3)