aio_fsync(3)

1aio_fsync(3)               Library Functions Manual               aio_fsync(3)
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NAME

6       aio_fsync - asynchronous file synchronization
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LIBRARY

9       Real-time library (librt, -lrt)
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SYNOPSIS

12       #include <aio.h>
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14       int aio_fsync(int op, struct aiocb *aiocbp);
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DESCRIPTION

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

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

39       EAGAIN Out of resources.
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41       EBADF  aio_fildes is not a valid file descriptor open for writing.
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43       EINVAL Synchronized  I/O  is  not supported for this file, or op is not
44              O_SYNC or O_DSYNC.
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46       ENOSYS aio_fsync() is not implemented.
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ATTRIBUTES

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

59       POSIX.1-2008.
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HISTORY

62       glibc 2.1.  POSIX.1-2001.
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