aio_fsync man page on HP-UX

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aio_fsync(2)							  aio_fsync(2)

       aio_fsync()  -  force  outstanding asynchronous operations on a file to
       the synchronized state

       The function asynchronously forces all I/O operations that are enqueued
       at  the	time  of  the call for the file or device referenced by to the
       synchronized I/O state.	The function call returns  when	 the  synchro‐
       nization request has been enqueued to the file or device (even when the
       data cannot be synchronized immediately).

       Successful completion of the request indicates that all	modified  data
       for has been moved to a permanent storage device.  The function affects
       only those asynchronous I/O operations enqueued	at  the	 time  of  the
       call.   Subsequently  enqueued  operations are not included in the syn‐
       chronizing operation.

       The function supports synchronized I/O for regular files, block special
       files, and character special files.

       If  the	is  all currently enqueued asynchronous I/O operations for are
       completed as if by a call to All data is forced	to  permanent  storage
       but  the meta-data (such as modification times) for the file descriptor
       is not necessarily updated.  If the is all currently enqueued asynchro‐
       nous  I/O  operations  for are completed as if by a call to All data is
       forced to  permanent  storage  and  the	file  descriptor  metadata  is

       If  an  request	is  issued  for a file when there is already a pending
       request, the first request is treated as though it  were	 part  of  the
       second,	and  the  second request will not complete until the first has

       The function returns when the fsync request has been enqueued  for  the
       referenced  file or device.  The and functions must be used to retrieve
       the status of the synchronization operation via the referenced  by  The
       status  returned will be until the last operation addressed by the ini‐
       tial request completes.	If all operations complete  successfully,  the
       error status will be 0 (zero).  Otherwise, the error status will be the
       error status that will be returned for the read or write operation that

       If  is  a valid signal event structure, then the designated signal will
       be delivered when the requested	synchronization	 operation  completes,
       either  when  all  subject requests have completed successfully or when
       any one of the requests has failed.

       To use this function, link in the realtime library by specifying on the
       compiler or linker command line.

       If the function fails, is returned and is set to indicate the error.

       If  detects  one of the following error conditions, is set to the indi‐
       cated value:

	      [EAGAIN]	     The request could not be queued  because  a  per-
			     process  or system-wide limit on asynchronous I/O
			     operations or  asynchronous  threads  would  have
			     been exceeded.

	      [EBADF]	     The is not a valid file descriptor open for writ‐

	      [EINVAL]	     Synchronized I/O is not supported	for  the  file
			     specified by

	      [EINVAL]	     The is not a valid address in the process virtual
			     address space.

	      [EINVAL]	     The parameters of the indicated in are invalid.

       aio_cancel(2),  aio_error(2),  aio_read(2),   aio_return(2),   aio_sus‐
       pend(2),	 aio_write(2), fdatasync(2), fsync(2), lio_listio(2), read(2),
       write(2), aio(5).


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