kubernetes/vendor/github.com/godbus/dbus/v5/conn_other.go

var execCommand …

func getSessionBusPlatformAddress() (string, error) { … }

// tryDiscoverDbusSessionBusAddress tries to discover an existing dbus session
// and return the value of its DBUS_SESSION_BUS_ADDRESS.
// It tries different techniques employed by different operating systems,
// returning the first valid address it finds, or an empty string.
//
// * /run/user/<uid>/bus           if this exists, it *is* the bus socket. present on
//                                 Ubuntu 18.04
// * /run/user/<uid>/dbus-session: if this exists, it can be parsed for the bus
//                                 address. present on Ubuntu 16.04
//
// See https://dbus.freedesktop.org/doc/dbus-launch.1.html
func tryDiscoverDbusSessionBusAddress() string { … }

func getRuntimeDirectory() (string, error) { … }

func fileExists(filename string) bool { … }