kubernetes/staging/src/k8s.io/kubectl/pkg/cmd/util/podcmd/podcmd.go

const DefaultContainerAnnotationName …

// FindContainerByName selects the named container from the spec of
// the provided pod or return nil if no such container exists.
func FindContainerByName(pod *v1.Pod, name string) (*v1.Container, string) { … }

// FindOrDefaultContainerByName defaults a container for a pod to the first container if any
// exists, or returns an error. It will print a message to the user indicating a default was
// selected if there was more than one container.
func FindOrDefaultContainerByName(pod *v1.Pod, name string, quiet bool, warn io.Writer) (*v1.Container, error) { … }

func AllContainerNames(pod *v1.Pod) string { … }