Function execFile

lib/child_process.js:326–525

* Spawns the specified file as a shell. * @param {string} file * @param {string[]} [args] * @param {{ * cwd?: string | URL; * env?: Record ; * encoding?: string; * timeout?: number; * maxBuffer?: number; * killSignal?: string | number; * uid?: number; * gid?

(file, args, options, callback)

 * @returns {ChildProcess}
 */
function execFile(file, args, options, callback) {
  ({ file, args, options, callback } = normalizeExecFileArgs(file, args, options, callback));

  options = {
    __proto__: null,
    encoding: 'utf8',
    timeout: 0,
    maxBuffer: MAX_BUFFER,
    killSignal: 'SIGTERM',
    cwd: null,
    env: null,
    shell: false,
    ...options,
  };

  // Validate the timeout, if present.
  validateTimeout(options.timeout);

  // Validate maxBuffer, if present.
  validateMaxBuffer(options.maxBuffer);

  options.killSignal = sanitizeKillSignal(options.killSignal);

  const child = spawn(file, args, {
    cwd: options.cwd,
    env: options.env,
    gid: options.gid,
    shell: options.shell,
    signal: options.signal,
    uid: options.uid,
    windowsHide: !!options.windowsHide,
    windowsVerbatimArguments: !!options.windowsVerbatimArguments,
  });

  let encoding;
  const _stdout = [];
  const _stderr = [];
  if (options.encoding !== 'buffer' && Buffer.isEncoding(options.encoding)) {
    encoding = options.encoding;
  } else {
    encoding = null;
  }
  let stdoutLen = 0;
  let stderrLen = 0;
  let killed = false;
  let exited = false;
  let timeoutId;

  let ex = null;

  let cmd = file;

  function exithandler(code, signal) {
    if (exited) return;
    exited = true;

    if (timeoutId) {
      clearTimeout(timeoutId);