FSYNC
Section: System Calls (2)
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BSD mandoc
BSD 4.2
NAME
fsync
- synchronize a file's in-core state with that on disk
SYNOPSIS
Fd #include <unistd.h>
Ft int
Fn fsync int fd
DESCRIPTION
Fn Fsync
causes all modified data and attributes of
Fa 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.
Fn 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
A 0 value is returned on success. A -1 value indicates
an error.
ERRORS
The
Fn fsync
fails if:
- Bq Er EBADF
-
Fa Fd
is not a valid descriptor.
- Bq Er EINVAL
-
Fa Fd
refers to a socket, not to a file.
- Bq Er EIO
-
An I/O error occurred while reading from or writing to the file system.
SEE ALSO
sync(2),
sync(8),
update(8)
HISTORY
The
Fn fsync
function call appeared in
BSD 4.2
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUES
-
- ERRORS
-
- SEE ALSO
-
- HISTORY
-
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Time: 19:41:53 GMT, December 25, 2022