Copyright (c) 1983 The Regents of the University of California.
All rights reserved.
%sccs.include.redist.man%
@(#)fsync.2 6.6 (Berkeley) 06/23/90
All rights reserved.
%sccs.include.redist.man%
@(#)fsync.2 6.6 (Berkeley) 06/23/90
FSYNC 2 ""
C 5 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 transaction facility.
"RETURN VALUE
A 0 value is returned on success. A -1 value indicates
an error.
"ERRORS
The fsync fails if:
15 [EBADF] Fd is not a valid descriptor.
15 [EINVAL] Fd refers to a socket, not to a file.
15 [EIO] An I/O error occurred while reading from or writing to the file system.
"SEE ALSO"
sync(2), sync(8), update(8)