/**
 * Shared process-level helpers.
 */

export function isProcessAlive(ownerPid: number): boolean {
  try {
    process.kill(ownerPid, 0);
    return true;
  } catch (err) {
    const nodeErr = err as NodeJS.ErrnoException;
    if (nodeErr.code === 'ESRCH') {
      return false;
    }
    if (nodeErr.code === 'EPERM') {
      return true;
    }
    throw err;
  }
}

export function isStaleRunningTask(ownerPid: number | undefined): boolean {
  return ownerPid == null || !isProcessAlive(ownerPid);
}