The
fsync ();
system call
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.
The
fsync ();
system call
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
Rv -std fsync
ERRORS
The
fsync ();
fails if:
Bq Er EBADF
The
Fa fd
argument
is not a valid descriptor.
Bq Er EINVAL
The
Fa fd
argument
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.
