Function truncate

lib/internal/fs/promises.js:1517–1525

(path, len = 0)

}

async function truncate(path, len = 0) {
  const h = vfsState.handlers;
  if (h !== null) {
    const promise = h.truncate(path, len);
    if (promise !== undefined) { await promise; return; }
  }
  const fd = await open(path, 'r+');
  return handleFdClose(ftruncate(fd, len), fd.close);
}

async function ftruncate(handle, len = 0) {
  validateInteger(len, 'len');