func (c *Conn) initConnection() error {
var err error
c.conn, err = dbus.SystemBusPrivate()
if err != nil {
return err
}
// Only use EXTERNAL method, and hardcode the uid (not username)
// to avoid a username lookup (which requires a dynamically linked
// libc)
methods := []dbus.Auth{dbus.AuthExternal(strconv.Itoa(os.Getuid()))}
err = c.conn.Auth(methods)
if err != nil {
c.conn.Close()
return err
}
err = c.conn.Hello()
if err != nil {
c.conn.Close()
return err
}
c.object = c.conn.Object("org.freedesktop.login1", dbus.ObjectPath(dbusPath))
return nil
}
func (c *Conn) dispatch() {
ch := make(chan *dbus.Signal, signalBuffer)
c.sigconn.Signal(ch)
go func() {
for {
signal, ok := <-ch
if !ok {
return
}
if signal.Name == "org.freedesktop.systemd1.Manager.JobRemoved" {
c.jobComplete(signal)
}
if c.subscriber.updateCh == nil {
continue
}
var unitPath dbus.ObjectPath
switch signal.Name {
case "org.freedesktop.systemd1.Manager.JobRemoved":
unitName := signal.Body[2].(string)
c.sysobj.Call("org.freedesktop.systemd1.Manager.GetUnit", 0, unitName).Store(&unitPath)
case "org.freedesktop.systemd1.Manager.UnitNew":
unitPath = signal.Body[1].(dbus.ObjectPath)
case "org.freedesktop.DBus.Properties.PropertiesChanged":
if signal.Body[0].(string) == "org.freedesktop.systemd1.Unit" {
unitPath = signal.Path
}
}
if unitPath == dbus.ObjectPath("") {
continue
}
c.sendSubStateUpdate(unitPath)
}
}()
}
func New() (c *Client, err error) {
c = new(Client)
c.conn, err = dbus.SystemBusPrivate()
if err != nil {
return nil, err
}
methods := []dbus.Auth{dbus.AuthExternal(strconv.Itoa(os.Getuid()))}
err = c.conn.Auth(methods)
if err != nil {
c.conn.Close()
return nil, err
}
err = c.conn.Hello()
if err != nil {
c.conn.Close()
return nil, err
}
c.object = c.conn.Object("com.coreos.update1", dbus.ObjectPath(dbusPath))
// Setup the filter for the StatusUpdate signals
match := fmt.Sprintf("type='signal',interface='%s',member='%s'", dbusInterface, dbusMember)
call := c.conn.BusObject().Call("org.freedesktop.DBus.AddMatch", 0, match)
if call.Err != nil {
return nil, err
}
c.ch = make(chan *dbus.Signal, signalBuffer)
c.conn.Signal(c.ch)
return c, nil
}
func systemdObject(conn *dbus.Conn) *dbus.Object {
return conn.Object("org.freedesktop.systemd1", dbus.ObjectPath("/org/freedesktop/systemd1"))
}