if e != nil {
		return e
	}
	defer f.Close()
	_, e = f.Write([]byte(data))
	return e
}

func (p *Process) signal(sig Signal) error {
	switch p.pidStatus() {
	case statusDone:
		return ErrProcessDone
	case statusReleased:
		return syscall.ENOENT
	}

	if e := p.writeProcFile("note", sig.String()); e != nil {
		return NewSyscallError("signal", e)
	}

	// completes its wait.
	//
	// Checking for statusDone here would not be a complete fix, as the PID
	// could still be waited on and reused prior to blockUntilWaitable.
	switch p.pidStatus() {
	case statusReleased:
		return nil, syscall.EINVAL
	}

	// If we can block until Wait4 will succeed immediately, do so.
	ready, err := p.blockUntilWaitable()
	if err != nil {
		return nil, err
	}

	for desc, test := range map[string]struct {
		pod               *v1.Pod
		status            *kubecontainer.PodStatus
		expectedChanged   bool
		expectedAttempt   uint32
		expectedSandboxID string
	}{
		"Pod with no existing sandboxes": {
			pod:               &v1.Pod{},
			status:            &kubecontainer.PodStatus{},
			expectedChanged:   true,
			expectedAttempt:   0,
			expectedSandboxID: "",
		},

// (changed, new attempt, original sandboxID if exist).
func PodSandboxChanged(pod *v1.Pod, podStatus *kubecontainer.PodStatus) (bool, uint32, string) {
	if len(podStatus.SandboxStatuses) == 0 {
		klog.V(2).InfoS("No sandbox for pod can be found. Need to start a new one", "pod", klog.KObj(pod))
		return true, 0, ""
	}

	readySandboxCount := 0
	for _, s := range podStatus.SandboxStatuses {
		if s.State == runtimeapi.PodSandboxState_SANDBOX_READY {

	podManager.SetPods(pods)
	// The original test here is totally meaningless, because fakeruntime will always return an empty podStatus. While
	// the original logic of isPodRunning happens to return true when podstatus is empty, so the test can always pass.
	// Now the logic in isPodRunning is changed, to let the test pass, we set the podstatus directly in fake runtime.

		})
	}

	SimplePods.Register(TrackerHandler[SimplePod](tt))

	pod := &corev1.Pod{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "name",
			Namespace: "namespace",
		},
		Status: corev1.PodStatus{PodIP: "1.2.3.4"},
	}
	pc.CreateOrUpdateStatus(pod)
	tt.WaitUnordered("add/namespace/name")
	assert.Equal(t, fetchSorted("1.2.3.4"), []SimplePod{{NewNamed(pod), Labeled{}, "1.2.3.4"}})

	pod.Status.PodIP = "1.2.3.5"

	pod := &corev1.Pod{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "test",
			Namespace: "test",
		},
		Spec: corev1.PodSpec{
			NodeName: "derp",
		},
		Status: corev1.PodStatus{
			PodIP: "11.1.1.12",
		},
	}

	podIPs := GetPodIPsIfPresent(pod)
	assert.Equal(t, len(podIPs), 1)
}

func TestGetPodIPsIfPodIPPresent(t *testing.T) {
	pod := &corev1.Pod{

		ObjectMeta: metav1.ObjectMeta{
			Name:      "svc",
			Namespace: "namespace",
		},
		Spec: corev1.ServiceSpec{Selector: map[string]string{"app": "foo"}},
	}
	sc.Create(svc)

	pod.Status = corev1.PodStatus{PodIP: "1.2.3.4"}
	pc.UpdateStatus(pod)

	assert.EventuallyEqual(t, fetch, []SimpleEndpoint{
		{pod.Name, svc.Name, pod.Namespace, "1.2.3.4"},
		{"name-static", svc.Name, pod.Namespace, "9.9.9.9"},
	})

	defer cancel()
	pod := &corev1.Pod{
		ObjectMeta: metav1.ObjectMeta{
			Name:      "pod-bingo",
			Namespace: "funkyns",
		},
		Spec: corev1.PodSpec{
			NodeName: NodeName,
		},
		Status: corev1.PodStatus{
			PodIP: fakePodIP,
		},
	}
	ns := &corev1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "funkyns"}}

	client := kube.NewFakeClient(ns, pod)

	// We are expecting at most 1 calls to the mock, wait for them

  // If not specified, the pod will be dispatched by default scheduler.
  // +optional
  optional string schedulername = 19;
}

// PodStatus represents information about the status of a pod. Status may trail the actual
// state of a system.
message PodStatus {
  // Current condition of the pod.
  // More info: http://kubernetes.io/docs/user-guide/pod-states#pod-phase
  // +optional
  optional string phase = 1;