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FSYNC(2)		    BSD	System Calls Manual		      FSYNC(2)

NAME
     fsync -- synchronise changes to a file

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     fsync(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 transaction facility.

RETURN VALUES
     The fsync() function returns the value 0 if successful; otherwise the
     value -1 is returned and the global variable errno	is set to indicate the
     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), syncer(4), sync(8)

HISTORY
     The fsync() function call appeared	in 4.2BSD.

BSD				 June 4, 1993				   BSD

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | HISTORY

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