Function fsync

lib/fs.js:1538–1551

* Requests for all data for the open file descriptor * to be flushed to the storage device. * @param {number} fd * @param {(err?: Error) => any} callback * @returns {void}

(fd, callback)

 * @returns {void}
 */
function fsync(fd, callback) {
  callback = makeCallback(callback);

  const h = vfsState.handlers;
  if (h !== null && vfsVoid(h.fsync(fd), callback)) return;

  const req = new FSReqCallback();
  req.oncomplete = callback;
  if (permission.isEnabled()) {
    callback(new ERR_ACCESS_DENIED('fsync API is disabled when Permission Model is enabled.'));
    return;
  }
  binding.fsync(fd, req);
}

/**
 * Synchronously requests for all data for the open