1AIO_FSYNC(3)               Linux Programmer's Manual              AIO_FSYNC(3)
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NAME

6       aio_fsync - asynchronous file synchronization
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SYNOPSIS

9       #include <aio.h>
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11       int aio_fsync(int op, struct aiocb *aiocbp);
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13       Link with -lrt.
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DESCRIPTION

16       The  aio_fsync()  function  does a sync on all outstanding asynchronous
17       I/O operations associated with aiocbp->aio_fildes.  (See aio(7)  for  a
18       description of the aiocb structure.)
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20       More  precisely,  if op is O_SYNC, then all currently queued I/O opera‐
21       tions shall be completed as if by a call of  fsync(2),  and  if  op  is
22       O_DSYNC, this call is the asynchronous analog of fdatasync(2).
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24       Note that this is a request only; it does not wait for I/O completion.
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26       Apart  from  aio_fildes,  the only field in the structure pointed to by
27       aiocbp that is used by this call is the aio_sigevent field (a  sigevent
28       structure,  described in sigevent(7)), which indicates the desired type
29       of asynchronous notification at completion.  All other fields  are  ig‐
30       nored.
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RETURN VALUE

33       On success (the sync request was successfully queued) this function re‐
34       turns 0.  On error, -1 is returned, and errno is set  to  indicate  the
35       error.
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ERRORS

38       EAGAIN Out of resources.
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40       EBADF  aio_fildes is not a valid file descriptor open for writing.
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42       EINVAL Synchronized  I/O  is  not supported for this file, or op is not
43              O_SYNC or O_DSYNC.
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45       ENOSYS aio_fsync() is not implemented.
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VERSIONS

48       The aio_fsync() function is available since glibc 2.1.
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ATTRIBUTES

51       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
52       tributes(7).
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54       ┌────────────────────────────────────────────┬───────────────┬─────────┐
55       │Interface                                   │ Attribute     │ Value   │
56       ├────────────────────────────────────────────┼───────────────┼─────────┤
57       │aio_fsync()                                 │ Thread safety │ MT-Safe │
58       └────────────────────────────────────────────┴───────────────┴─────────┘
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CONFORMING TO

61       POSIX.1-2001, POSIX.1-2008.
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SEE ALSO

64       aio_cancel(3),   aio_error(3),   aio_read(3),  aio_return(3),  aio_sus‐
65       pend(3), aio_write(3), lio_listio(3), aio(7), sigevent(7)
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COLOPHON

68       This page is part of release 5.12 of the Linux  man-pages  project.   A
69       description  of  the project, information about reporting bugs, and the
70       latest    version    of    this    page,    can     be     found     at
71       https://www.kernel.org/doc/man-pages/.
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75                                  2021-03-22                      AIO_FSYNC(3)
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