code: func exitStatus(ps *os.ProcessState) (int, bool) {
  	if status, ok := ps.Sys().(syscall.WaitStatus); ok {
  		return status.ExitStatus(), true
  	}
  
  	return 0, false
  }
docs: // exitStatus for platforms with syscall.WaitStatus which are listed
  // at the top of this file in the build constraints.