Function truncateSync

lib/fs.js:1294–1312

* Synchronously truncates the file. * @param {string | Buffer | URL} path * @param {number} [len] * @returns {void}

(path, len)

 * @returns {void}
 */
function truncateSync(path, len) {
  if (len === undefined) {
    len = 0;
  }

  const h = vfsState.handlers;
  if (h !== null) {
    const result = h.truncateSync(path, len);
    if (result !== undefined) return;
  }

  // Allow error to be thrown, but still close fd.
  const fd = fs.openSync(path, 'r+');
  try {
    fs.ftruncateSync(fd, len);
  } finally {
    fs.closeSync(fd);
  }
}

/**
 * Truncates the file descriptor.