Function processIsAlive

pkg/npm/install.js:247–257

(pid)

}

function processIsAlive(pid) {
  if (!Number.isSafeInteger(pid) || pid <= 0) return false;
  try {
    process.kill(pid, 0);
    return true;
  } catch (err) {
    // Access denial is conservative evidence of a live process. Only an
    // explicit missing-process result permits reclamation.
    return err && err.code !== 'ESRCH';
  }
}

function readBinaryLockOwner(lockPath) {
  try {