1FSYNC(2)                      System Calls Manual                     FSYNC(2)
2
3
4

NAME

6       fsync - synchronize a file's in-core state with that on disk
7

SYNOPSIS

9       fsync(fd)
10       int fd;
11

DESCRIPTION

13       Fsync  causes  all  modified data and attributes of fd to be moved to a
14       permanent storage device.  This normally results in all  in-core  modi‐
15       fied copies of buffers for the associated file to be written to a disk.
16
17       Fsync  should  be used by programs that require a file to be in a known
18       state, for example, in building a simple transaction facility.
19

RETURN VALUE

21       A 0 value is returned on success.  A -1 value indicates an error.
22

ERRORS

24       The fsync fails if:
25
26       [EBADF]        Fd is not a valid descriptor.
27
28       [EINVAL]       Fd refers to a socket, not to a file.
29
30       [EIO]          An I/O error occurred while reading from or  writing  to
31                      the file system.
32

SEE ALSO

34       sync(2), sync(8), update(8)
35
36
37
384.2 Berkeley Distribution        May 22, 1986                         FSYNC(2)