FSYNC(2)	    UNIX Programmer's Manual		 FSYNC(2)


NAME
     fsync - synchronize a file's in-core state with that on disk

SYNOPSIS
     fsync(fd)
     int fd;

DESCRIPTION
     Fsync causes all modified data and attributes of fd to be
     moved to a permanent storage device.  This normally results
     in all in-core modified copies of buffers for the associated
     file to be written to a disk.

     Fsync should be used by programs that require a file to be
     in a known state, for example, in building a simple transac-
     tion facility.

RETURN VALUE
     A 0 value is returned on success.	A -1 value indicates an
     error.

ERRORS
     The fsync fails if:

     [EBADF]	    Fd is not a valid descriptor.

     [EINVAL]	    Fd refers to a socket, not to a file.

     [EIO]	    An I/O error occurred while reading from or
		    writing to the file system.

SEE ALSO
     sync(2), sync(8), update(8)


Printed 11/26/99	  May 22, 1986				1


 
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