}

	return fmt.Errorf("failure running port forward process: %v", err)
}

func ClosePortForwarderOnInterrupt(fw kube.PortForwarder) {
	go func() {
		signals := make(chan os.Signal, 1)
		signal.Notify(signals, os.Interrupt)
		defer signal.Stop(signals)
		<-signals
		fw.Close()
	}()
}

func openBrowser(url string, writer io.Writer, browser bool) {
	var err error

	fmt.Fprintf(writer, "%s\n", url)

  // If this value is nil, the default grace period will be used instead.
  // The grace period is the duration in seconds after the processes running in the carp are sent
  // a termination signal and the time when the processes are forcibly halted with a kill signal.
  // Set this value longer than the expected cleanup time for your process.
  // Defaults to 30 seconds.
  // +optional
  optional int64 terminationGracePeriodSeconds = 4;

	// the CNI binary installed.
	if err := installer.Run(ctx); err != nil {
		if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
			// Error was caused by interrupt/termination signal
			t.Logf("installer complete: %v", err)
		} else {
			t.Errorf("installer failed: %v", err)
		}
	}

	if cleanErr := installer.Cleanup(); cleanErr != nil {

			args: args{
				namespace: namespaceWithAmbientEnabledLabel,
				pod:       podWithSidecar,
			},
			want: false,
		},
		// TODO: when there exists a means for users to signal the intent to exclude a pod from ambient without requiring the use of
		// the ambient redirection annotation, this annotation should no longer be checked by this function and this case should return 'true'
		{

  // the kill signal (no opportunity to shut down).
  // If this value is nil, the default grace period will be used instead.
  // The grace period is the duration in seconds after the processes running in the pod are sent
  // a termination signal and the time when the processes are forcibly halted with a kill signal.
  // Set this value longer than the expected cleanup time for your process.

package main

import (
	"context"
	"os"
	"os/signal"
	"syscall"

	"istio.io/istio/cni/pkg/cmd"
	"istio.io/istio/pkg/log"
)

func main() {
	// Create context that cancels on termination signal
	ctx, cancel := context.WithCancel(context.Background())
	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, os.Interrupt, syscall.SIGTERM)
	go func(sigChan chan os.Signal, cancel context.CancelFunc) {
		sig := <-sigChan

		if err = installer.Run(ctx); err != nil {
			if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
				log.Infof("installer complete: %v", err)
				// Error was caused by interrupt/termination signal
				err = nil
			} else {
				log.Errorf("installer failed: %v", err)
			}
		}

		if cleanErr := installer.Cleanup(); cleanErr != nil {
			if err != nil {

// It can be optionally associated with a particular assigner, in which case it
// contains one valid set of trust anchors for that signer. Signers may have
// multiple associated ClusterTrustBundles; each is an independent set of trust
// anchors for that signer. Admission control is used to enforce that only users
// with permissions on the signer can create or modify the corresponding bundle.
message ClusterTrustBundle {
  // metadata contains the object metadata.

		// TODO: https://github.com/istio/istio/issues/41937
		grpc.WithTransportCredentials(credentials.NewTLS(
			&tls.Config{
				// Always skip verifying, because without it we always get "certificate signed by unknown authority".
				// We don't set the XDSSAN for the same reason.
				InsecureSkipVerify: true,
			})),
		grpc.WithPerRPCCredentials(k8sCreds),
	}, nil

		return false
	}
	if podHasSidecar(pod) {
		// Ztunnel and sidecar for a single pod is currently not supported; opt out.
		return false
	}
	// TODO: delete this block when there is a way for users to signal the intent to exclude
	// a pod from ambient that does not require the use of this annotation
	if pod.Annotations[constants.AmbientRedirection] == constants.AmbientRedirectionDisabled {