Function kill

lib/monitor/run.js:338–438

(child, signal, callback)

}

function kill(child, signal, callback) {
  if (!callback) {
    callback = noop;
  }

  if (utils.isWindows) {
    const taskKill = () => {
      try {
        exec('taskkill /pid ' + child.pid + ' /T /F');
      } catch (e) {
        utils.log.error('Could not shutdown sub process cleanly');
      }
    };

    // We are handling a 'SIGKILL' , 'SIGUSR2' and 'SIGUSR1' POSIX signal under Windows the
    // same way it is handled on a UNIX system: We are performing
    // a hard shutdown without waiting for the process to clean-up.
    if (
      signal === 'SIGKILL' ||
      osRelease < 10 ||
      signal === 'SIGUSR2' ||
      signal === 'SIGUSR1'
    ) {
      debug('terminating process group by force: %s', child.pid);

      // We are using the taskkill utility to terminate the whole
      // process group ('/t') of the child ('/pid') by force ('/f').
      // We need to end all sub processes, because the 'child'
      // process in this context is actually a cmd.exe wrapper.
      taskKill();
      callback();
      return;
    }

    try {
      // We are using the Windows Management Instrumentation Command-line
      // (wmic.exe) to resolve the sub-child process identifier, because the
      // 'child' process in this context is actually a cmd.exe wrapper.
      // We want to send the termination signal directly to the node process.
      // The '2> nul' silences the no process found error message.
      const resultBuffer = execSync(
        `wmic process where (ParentProcessId=${child.pid}) get ProcessId 2> nul`
      );
      const result = resultBuffer.toString().match(/^[0-9]+/m);

      // If there is no sub-child process we fall back to the child process.
      const processId = Array.isArray(result) ? result[0] : child.pid;

      debug('sending kill signal SIGINT to process: %s', processId);

      // We are using the standalone 'windows-kill' executable to send the
      // standard POSIX signal 'SIGINT' to the node process. This fixes #1720.
      const windowsKill = path.normalize(
        `${__dirname}/../../bin/windows-kill.exe`
      );

      // We have to detach the 'windows-kill' execution completely from this
      // process group to avoid terminating the nodemon process itself.