45 files changed, 322 insertions, 199 deletions

diff --git a/vendor/github.com/godbus/dbus/.travis.yml b/vendor/github.com/godbus/dbus/.travis.yml
deleted file mode 100644
index 9cd57f432..000000000
--- a/vendor/github.com/godbus/dbus/.travis.yml
+++ /dev/null
@@ -1,46 +0,0 @@
-dist: precise
-language: go
-go_import_path: github.com/godbus/dbus
-sudo: true
-
-go:
-  - 1.7.3
-  - 1.8.7
-  - 1.9.5
-  - 1.10.1
-  - tip
-
-env:
-  global:
-  matrix:
-   - TARGET=amd64
-   - TARGET=arm64
-   - TARGET=arm
-   - TARGET=386
-   - TARGET=ppc64le
-
-matrix:
-  fast_finish: true
-  allow_failures:
-    - go: tip
-  exclude:
-  - go: tip
-    env: TARGET=arm
-  - go: tip
-    env: TARGET=arm64
-  - go: tip
-    env: TARGET=386
-  - go: tip
-    env: TARGET=ppc64le
-
-addons:
-  apt:
-    packages:
-    - dbus
-    - dbus-x11
-
-before_install:
-
-script:
-  - go test -v -race ./...                   # Run all the tests with the race detector enabled
-  - go vet ./...                             # go vet is the official Go static analyzer
diff --git a/vendor/github.com/godbus/dbus/go.mod b/vendor/github.com/godbus/dbus/go.mod
deleted file mode 100644
index 57014e4ac..000000000
--- a/vendor/github.com/godbus/dbus/go.mod
+++ /dev/null
@@ -1,3 +0,0 @@
-module github.com/godbus/dbus
-
-go 1.12
diff --git a/vendor/github.com/godbus/dbus/v5/.travis.yml b/vendor/github.com/godbus/dbus/v5/.travis.yml
new file mode 100644
index 000000000..dd6767204
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/v5/.travis.yml
@@ -0,0 +1,50 @@
+dist: bionic
+language: go
+go_import_path: github.com/godbus/dbus
+
+go:
+  - 1.11.x
+  - 1.12.x
+  - 1.13.x
+  - tip
+
+matrix:
+  fast_finish: true
+  allow_failures:
+    - go: tip
+
+addons:
+  apt:
+    packages:
+    - dbus
+    - dbus-x11
+
+before_install:
+  - export GO111MODULE=on
+
+script:
+  - go test -v -race -mod=readonly ./...     # Run all the tests with the race detector enabled
+  - go vet ./...                             # go vet is the official Go static analyzer
+
+jobs:
+  include:
+    # The build matrix doesn't cover build stages, so manually expand
+    # the jobs with anchors
+    - &multiarch
+      stage: "Multiarch Test"
+      go: 1.11.x
+      env: TARGETS="386 arm arm64 ppc64le"
+      before_install:
+        - docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
+      script:
+        - |
+          set -e
+          for target in $TARGETS; do
+            printf "\e[1mRunning test suite under ${target}.\e[0m\n"
+            GOARCH="$target" go test -v ./...
+            printf "\n\n"
+          done
+    - <<: *multiarch
+      go: 1.12.x
+    - <<: *multiarch
+      go: 1.13.x
diff --git a/vendor/github.com/godbus/dbus/CONTRIBUTING.md b/vendor/github.com/godbus/dbus/v5/CONTRIBUTING.md
index c88f9b2bd..c88f9b2bd 100644
--- a/vendor/github.com/godbus/dbus/CONTRIBUTING.md
+++ b/vendor/github.com/godbus/dbus/v5/CONTRIBUTING.md
diff --git a/vendor/github.com/godbus/dbus/LICENSE b/vendor/github.com/godbus/dbus/v5/LICENSE
index 670d88fca..670d88fca 100644
--- a/vendor/github.com/godbus/dbus/LICENSE
+++ b/vendor/github.com/godbus/dbus/v5/LICENSE
diff --git a/vendor/github.com/godbus/dbus/MAINTAINERS b/vendor/github.com/godbus/dbus/v5/MAINTAINERS
index 27618c9cd..27618c9cd 100644
--- a/vendor/github.com/godbus/dbus/MAINTAINERS
+++ b/vendor/github.com/godbus/dbus/v5/MAINTAINERS
diff --git a/vendor/github.com/godbus/dbus/README.markdown b/vendor/github.com/godbus/dbus/v5/README.markdown
index fd2964875..fd2964875 100644
--- a/vendor/github.com/godbus/dbus/README.markdown
+++ b/vendor/github.com/godbus/dbus/v5/README.markdown
diff --git a/vendor/github.com/godbus/dbus/auth.go b/vendor/github.com/godbus/dbus/v5/auth.go
index b0dcb54e6..31abac629 100644
--- a/vendor/github.com/godbus/dbus/auth.go
+++ b/vendor/github.com/godbus/dbus/v5/auth.go
@@ -77,7 +77,7 @@ func (conn *Conn) Auth(methods []Auth) error {
 		for _, m := range methods {
 			if name, data, status := m.FirstData(); bytes.Equal(v, name) {
 				var ok bool
-				err = authWriteLine(conn.transport, []byte("AUTH"), []byte(v), data)
+				err = authWriteLine(conn.transport, []byte("AUTH"), v, data)
 				if err != nil {
 					return err
 				}
@@ -127,7 +127,7 @@ func (conn *Conn) Auth(methods []Auth) error {
 // tryAuth tries to authenticate with m as the mechanism, using state as the
 // initial authState and in for reading input. It returns (nil, true) on
 // success, (nil, false) on a REJECTED and (someErr, false) if some other
-// error occured.
+// error occurred.
 func (conn *Conn) tryAuth(m Auth, state authState, in *bufio.Reader) (error, bool) {
 	for {
 		s, err := authReadLine(in)
diff --git a/vendor/github.com/godbus/dbus/auth_anonymous.go b/vendor/github.com/godbus/dbus/v5/auth_anonymous.go
index 75f3ad34d..75f3ad34d 100644
--- a/vendor/github.com/godbus/dbus/auth_anonymous.go
+++ b/vendor/github.com/godbus/dbus/v5/auth_anonymous.go
diff --git a/vendor/github.com/godbus/dbus/auth_external.go b/vendor/github.com/godbus/dbus/v5/auth_external.go
index 7e376d3ef..7e376d3ef 100644
--- a/vendor/github.com/godbus/dbus/auth_external.go
+++ b/vendor/github.com/godbus/dbus/v5/auth_external.go
diff --git a/vendor/github.com/godbus/dbus/auth_sha1.go b/vendor/github.com/godbus/dbus/v5/auth_sha1.go
index df15b4611..80286700b 100644
--- a/vendor/github.com/godbus/dbus/auth_sha1.go
+++ b/vendor/github.com/godbus/dbus/v5/auth_sha1.go
@@ -60,7 +60,7 @@ func (a authCookieSha1) HandleData(data []byte) ([]byte, AuthStatus) {
 
 // getCookie searches for the cookie identified by id in context and returns
 // the cookie content or nil. (Since HandleData can't return a specific error,
-// but only whether an error occured, this function also doesn't bother to
+// but only whether an error occurred, this function also doesn't bother to
 // return an error.)
 func (a authCookieSha1) getCookie(context, id []byte) []byte {
 	file, err := os.Open(a.home + "/.dbus-keyrings/" + string(context))
diff --git a/vendor/github.com/godbus/dbus/call.go b/vendor/github.com/godbus/dbus/v5/call.go
index 2cb189012..2cb189012 100644
--- a/vendor/github.com/godbus/dbus/call.go
+++ b/vendor/github.com/godbus/dbus/v5/call.go
diff --git a/vendor/github.com/godbus/dbus/conn.go b/vendor/github.com/godbus/dbus/v5/conn.go
index 9dced0cc4..b55bc99c8 100644
--- a/vendor/github.com/godbus/dbus/conn.go
+++ b/vendor/github.com/godbus/dbus/v5/conn.go
@@ -5,7 +5,6 @@ import (
 	"errors"
 	"io"
 	"os"
-	"reflect"
 	"strings"
 	"sync"
 )
@@ -31,6 +30,12 @@ var ErrClosed = errors.New("dbus: connection closed by user")
 type Conn struct {
 	transport
 
+	ctx       context.Context
+	cancelCtx context.CancelFunc
+
+	closeOnce sync.Once
+	closeErr  error
+
 	busObj BusObject
 	unixFD bool
 	uuid   string
@@ -38,6 +43,8 @@ type Conn struct {
 	handler       Handler
 	signalHandler SignalHandler
 	serialGen     SerialGenerator
+	inInt         Interceptor
+	outInt        Interceptor
 
 	names      *nameTracker
 	calls      *callTracker
@@ -190,6 +197,33 @@ func WithSerialGenerator(gen SerialGenerator) ConnOption {
 	}
 }
 
+// Interceptor intercepts incoming and outgoing messages.
+type Interceptor func(msg *Message)
+
+// WithIncomingInterceptor sets the given interceptor for incoming messages.
+func WithIncomingInterceptor(interceptor Interceptor) ConnOption {
+	return func(conn *Conn) error {
+		conn.inInt = interceptor
+		return nil
+	}
+}
+
+// WithOutgoingInterceptor sets the given interceptor for outgoing messages.
+func WithOutgoingInterceptor(interceptor Interceptor) ConnOption {
+	return func(conn *Conn) error {
+		conn.outInt = interceptor
+		return nil
+	}
+}
+
+// WithContext overrides  the default context for the connection.
+func WithContext(ctx context.Context) ConnOption {
+	return func(conn *Conn) error {
+		conn.ctx = ctx
+		return nil
+	}
+}
+
 // NewConn creates a new private *Conn from an already established connection.
 func NewConn(conn io.ReadWriteCloser, opts ...ConnOption) (*Conn, error) {
 	return newConn(genericTransport{conn}, opts...)
@@ -211,6 +245,15 @@ func newConn(tr transport, opts ...ConnOption) (*Conn, error) {
 			return nil, err
 		}
 	}
+	if conn.ctx == nil {
+		conn.ctx = context.Background()
+	}
+	conn.ctx, conn.cancelCtx = context.WithCancel(conn.ctx)
+	go func() {
+		<-conn.ctx.Done()
+		conn.Close()
+	}()
+
 	conn.calls = newCallTracker()
 	if conn.handler == nil {
 		conn.handler = NewDefaultHandler()
@@ -237,27 +280,38 @@ func (conn *Conn) BusObject() BusObject {
 // and the channels passed to Eavesdrop and Signal are closed. This method must
 // not be called on shared connections.
 func (conn *Conn) Close() error {
-	conn.outHandler.close()
-	if term, ok := conn.signalHandler.(Terminator); ok {
-		term.Terminate()
-	}
+	conn.closeOnce.Do(func() {
+		conn.outHandler.close()
+		if term, ok := conn.signalHandler.(Terminator); ok {
+			term.Terminate()
+		}
 
-	if term, ok := conn.handler.(Terminator); ok {
-		term.Terminate()
-	}
+		if term, ok := conn.handler.(Terminator); ok {
+			term.Terminate()
+		}
 
-	conn.eavesdroppedLck.Lock()
-	if conn.eavesdropped != nil {
-		close(conn.eavesdropped)
-	}
-	conn.eavesdroppedLck.Unlock()
+		conn.eavesdroppedLck.Lock()
+		if conn.eavesdropped != nil {
+			close(conn.eavesdropped)
+		}
+		conn.eavesdroppedLck.Unlock()
+
+		conn.cancelCtx()
+
+		conn.closeErr = conn.transport.Close()
+	})
+	return conn.closeErr
+}
 
-	return conn.transport.Close()
+// Context returns the context associated with the connection.  The
+// context will be cancelled when the connection is closed.
+func (conn *Conn) Context() context.Context {
+	return conn.ctx
 }
 
 // Eavesdrop causes conn to send all incoming messages to the given channel
 // without further processing. Method replies, errors and signals will not be
-// sent to the appropiate channels and method calls will not be handled. If nil
+// sent to the appropriate channels and method calls will not be handled. If nil
 // is passed, the normal behaviour is restored.
 //
 // The caller has to make sure that ch is sufficiently buffered;
@@ -294,7 +348,7 @@ func (conn *Conn) inWorker() {
 		msg, err := conn.ReadMessage()
 		if err != nil {
 			if _, ok := err.(InvalidMessageError); !ok {
-				// Some read error occured (usually EOF); we can't really do
+				// Some read error occurred (usually EOF); we can't really do
 				// anything but to shut down all stuff and returns errors to all
 				// pending replies.
 				conn.Close()
@@ -323,6 +377,10 @@ func (conn *Conn) inWorker() {
 			// Ignore it.
 			continue
 		}
+
+		if conn.inInt != nil {
+			conn.inInt(msg)
+		}
 		switch msg.Type {
 		case TypeError:
 			conn.serialGen.RetireSerial(conn.calls.handleDBusError(msg))
@@ -383,11 +441,10 @@ func (conn *Conn) Object(dest string, path ObjectPath) BusObject {
 	return &Object{conn, dest, path}
 }
 
-func (conn *Conn) sendMessage(msg *Message) {
-	conn.sendMessageAndIfClosed(msg, func() {})
-}
-
 func (conn *Conn) sendMessageAndIfClosed(msg *Message, ifClosed func()) {
+	if conn.outInt != nil {
+		conn.outInt(msg)
+	}
 	err := conn.outHandler.sendAndIfClosed(msg, ifClosed)
 	conn.calls.handleSendError(msg, err)
 	if err != nil {
@@ -483,7 +540,7 @@ func (conn *Conn) sendError(err error, dest string, serial uint32) {
 	if len(e.Body) > 0 {
 		msg.Headers[FieldSignature] = MakeVariant(SignatureOf(e.Body...))
 	}
-	conn.sendMessage(msg)
+	conn.sendMessageAndIfClosed(msg, nil)
 }
 
 // sendReply creates a method reply message corresponding to the parameters and
@@ -501,33 +558,54 @@ func (conn *Conn) sendReply(dest string, serial uint32, values ...interface{}) {
 	if len(values) > 0 {
 		msg.Headers[FieldSignature] = MakeVariant(SignatureOf(values...))
 	}
-	conn.sendMessage(msg)
+	conn.sendMessageAndIfClosed(msg, nil)
 }
 
-func (conn *Conn) defaultSignalAction(fn func(h *defaultSignalHandler, ch chan<- *Signal), ch chan<- *Signal) {
-	if !isDefaultSignalHandler(conn.signalHandler) {
-		return
-	}
-	handler := conn.signalHandler.(*defaultSignalHandler)
-	fn(handler, ch)
+// AddMatchSignal registers the given match rule to receive broadcast
+// signals based on their contents.
+func (conn *Conn) AddMatchSignal(options ...MatchOption) error {
+	options = append([]MatchOption{withMatchType("signal")}, options...)
+	return conn.busObj.Call(
+		"org.freedesktop.DBus.AddMatch", 0,
+		formatMatchOptions(options),
+	).Store()
+}
+
+// RemoveMatchSignal removes the first rule that matches previously registered with AddMatchSignal.
+func (conn *Conn) RemoveMatchSignal(options ...MatchOption) error {
+	options = append([]MatchOption{withMatchType("signal")}, options...)
+	return conn.busObj.Call(
+		"org.freedesktop.DBus.RemoveMatch", 0,
+		formatMatchOptions(options),
+	).Store()
 }
 
 // Signal registers the given channel to be passed all received signal messages.
-// The caller has to make sure that ch is sufficiently buffered; if a message
-// arrives when a write to c is not possible, it is discarded.
 //
 // Multiple of these channels can be registered at the same time.
 //
 // These channels are "overwritten" by Eavesdrop; i.e., if there currently is a
 // channel for eavesdropped messages, this channel receives all signals, and
 // none of the channels passed to Signal will receive any signals.
+//
+// Panics if the signal handler is not a `SignalRegistrar`.
 func (conn *Conn) Signal(ch chan<- *Signal) {
-	conn.defaultSignalAction((*defaultSignalHandler).addSignal, ch)
+	handler, ok := conn.signalHandler.(SignalRegistrar)
+	if !ok {
+		panic("cannot use this method with a non SignalRegistrar handler")
+	}
+	handler.AddSignal(ch)
 }
 
 // RemoveSignal removes the given channel from the list of the registered channels.
+//
+// Panics if the signal handler is not a `SignalRegistrar`.
 func (conn *Conn) RemoveSignal(ch chan<- *Signal) {
-	conn.defaultSignalAction((*defaultSignalHandler).removeSignal, ch)
+	handler, ok := conn.signalHandler.(SignalRegistrar)
+	if !ok {
+		panic("cannot use this method with a non SignalRegistrar handler")
+	}
+	handler.RemoveSignal(ch)
 }
 
 // SupportsUnixFDs returns whether the underlying transport supports passing of
@@ -614,18 +692,6 @@ func getTransport(address string) (transport, error) {
 	return nil, err
 }
 
-// dereferenceAll returns a slice that, assuming that vs is a slice of pointers
-// of arbitrary types, containes the values that are obtained from dereferencing
-// all elements in vs.
-func dereferenceAll(vs []interface{}) []interface{} {
-	for i := range vs {
-		v := reflect.ValueOf(vs[i])
-		v = v.Elem()
-		vs[i] = v.Interface()
-	}
-	return vs
-}
-
 // getKey gets a key from a the list of keys. Returns "" on error / not found...
 func getKey(s, key string) string {
 	for _, keyEqualsValue := range strings.Split(s, ",") {
@@ -650,7 +716,9 @@ func (h *outputHandler) sendAndIfClosed(msg *Message, ifClosed func()) error {
 	h.closed.lck.RLock()
 	defer h.closed.lck.RUnlock()
 	if h.closed.isClosed {
-		ifClosed()
+		if ifClosed != nil {
+			ifClosed()
+		}
 		return nil
 	}
 	h.sendLck.Lock()
@@ -801,7 +869,6 @@ func (tracker *callTracker) finalize(sn uint32) {
 		delete(tracker.calls, sn)
 		c.ContextCancel()
 	}
-	return
 }
 
 func (tracker *callTracker) finalizeWithBody(sn uint32, body []interface{}) {
@@ -815,7 +882,6 @@ func (tracker *callTracker) finalizeWithBody(sn uint32, body []interface{}) {
 		c.Body = body
 		c.done()
 	}
-	return
 }
 
 func (tracker *callTracker) finalizeWithError(sn uint32, err error) {
@@ -829,7 +895,6 @@ func (tracker *callTracker) finalizeWithError(sn uint32, err error) {
 		c.Err = err
 		c.done()
 	}
-	return
 }
 
 func (tracker *callTracker) finalizeAllWithError(err error) {
diff --git a/vendor/github.com/godbus/dbus/conn_darwin.go b/vendor/github.com/godbus/dbus/v5/conn_darwin.go
index 6e2e40202..6e2e40202 100644
--- a/vendor/github.com/godbus/dbus/conn_darwin.go
+++ b/vendor/github.com/godbus/dbus/v5/conn_darwin.go
diff --git a/vendor/github.com/godbus/dbus/conn_other.go b/vendor/github.com/godbus/dbus/v5/conn_other.go
index 616dcf664..616dcf664 100644
--- a/vendor/github.com/godbus/dbus/conn_other.go
+++ b/vendor/github.com/godbus/dbus/v5/conn_other.go
diff --git a/vendor/github.com/godbus/dbus/conn_unix.go b/vendor/github.com/godbus/dbus/v5/conn_unix.go
index 4cba8ae8e..58aee7d2a 100644
--- a/vendor/github.com/godbus/dbus/conn_unix.go
+++ b/vendor/github.com/godbus/dbus/v5/conn_unix.go
@@ -4,7 +4,6 @@ package dbus
 
 import (
 	"os"
-	"fmt"
 )
 
 const defaultSystemBusAddress = "unix:path=/var/run/dbus/system_bus_socket"
@@ -12,7 +11,7 @@ const defaultSystemBusAddress = "unix:path=/var/run/dbus/system_bus_socket"
 func getSystemBusPlatformAddress() string {
 	address := os.Getenv("DBUS_SYSTEM_BUS_ADDRESS")
 	if address != "" {
-		return fmt.Sprintf("unix:path=%s", address)
+		return address
 	}
 	return defaultSystemBusAddress
-}
\ No newline at end of file
+}
diff --git a/vendor/github.com/godbus/dbus/conn_windows.go b/vendor/github.com/godbus/dbus/v5/conn_windows.go
index 4291e4519..4291e4519 100644
--- a/vendor/github.com/godbus/dbus/conn_windows.go
+++ b/vendor/github.com/godbus/dbus/v5/conn_windows.go
diff --git a/vendor/github.com/godbus/dbus/dbus.go b/vendor/github.com/godbus/dbus/v5/dbus.go
index c6d0d3ce0..428923d26 100644
--- a/vendor/github.com/godbus/dbus/dbus.go
+++ b/vendor/github.com/godbus/dbus/v5/dbus.go
@@ -87,6 +87,7 @@ func setDest(dest, src reflect.Value) error {
 	}
 	if isVariant(src.Type()) && !isVariant(dest.Type()) {
 		src = getVariantValue(src)
+		return store(dest, src)
 	}
 	if !src.Type().ConvertibleTo(dest.Type()) {
 		return fmt.Errorf(
diff --git a/vendor/github.com/godbus/dbus/decoder.go b/vendor/github.com/godbus/dbus/v5/decoder.go
index ede91575b..ede91575b 100644
--- a/vendor/github.com/godbus/dbus/decoder.go
+++ b/vendor/github.com/godbus/dbus/v5/decoder.go
diff --git a/vendor/github.com/godbus/dbus/default_handler.go b/vendor/github.com/godbus/dbus/v5/default_handler.go
index 890b6f4e0..6d8bf32f9 100644
--- a/vendor/github.com/godbus/dbus/default_handler.go
+++ b/vendor/github.com/godbus/dbus/v5/default_handler.go
@@ -47,7 +47,7 @@ func (h *defaultHandler) introspectPath(path ObjectPath) string {
 	subpath := make(map[string]struct{})
 	var xml bytes.Buffer
 	xml.WriteString("<node>")
-	for obj, _ := range h.objects {
+	for obj := range h.objects {
 		p := string(path)
 		if p != "/" {
 			p += "/"
@@ -57,7 +57,7 @@ func (h *defaultHandler) introspectPath(path ObjectPath) string {
 			subpath[node_name] = struct{}{}
 		}
 	}
-	for s, _ := range subpath {
+	for s := range subpath {
 		xml.WriteString("\n\t<node name=\"" + s + "\"/>")
 	}
 	xml.WriteString("\n</node>")
@@ -234,88 +234,95 @@ func (obj *exportedIntf) isFallbackInterface() bool {
 //
 // Deprecated: this is the default value, don't use it, it will be unexported.
 func NewDefaultSignalHandler() *defaultSignalHandler {
-	return &defaultSignalHandler{
-		closeChan: make(chan struct{}),
-	}
-}
-
-func isDefaultSignalHandler(handler SignalHandler) bool {
-	_, ok := handler.(*defaultSignalHandler)
-	return ok
+	return &defaultSignalHandler{}
 }
 
 type defaultSignalHandler struct {
-	sync.RWMutex
-	closed    bool
-	signals   []chan<- *Signal
-	closeChan chan struct{}
+	mu      sync.RWMutex
+	closed  bool
+	signals []*signalChannelData
 }
 
 func (sh *defaultSignalHandler) DeliverSignal(intf, name string, signal *Signal) {
-	sh.RLock()
-	defer sh.RUnlock()
+	sh.mu.RLock()
+	defer sh.mu.RUnlock()
 	if sh.closed {
 		return
 	}
-	for _, ch := range sh.signals {
-		select {
-		case ch <- signal:
-		case <-sh.closeChan:
-			return
-		default:
-			go func(ch chan<- *Signal) {
-				select {
-				case ch <- signal:
-				case <-sh.closeChan:
-					return
-				}
-			}(ch)
-		}
+	for _, scd := range sh.signals {
+		scd.deliver(signal)
 	}
 }
 
-func (sh *defaultSignalHandler) Init() error {
-	sh.Lock()
-	sh.signals = make([]chan<- *Signal, 0)
-	sh.closeChan = make(chan struct{})
-	sh.Unlock()
-	return nil
-}
-
 func (sh *defaultSignalHandler) Terminate() {
-	sh.Lock()
-	if !sh.closed {
-		close(sh.closeChan)
+	sh.mu.Lock()
+	defer sh.mu.Unlock()
+	if sh.closed {
+		return
 	}
-	sh.closed = true
-	for _, ch := range sh.signals {
-		close(ch)
+
+	for _, scd := range sh.signals {
+		scd.close()
+		close(scd.ch)
 	}
+	sh.closed = true
 	sh.signals = nil
-	sh.Unlock()
 }
 
-func (sh *defaultSignalHandler) addSignal(ch chan<- *Signal) {
-	sh.Lock()
-	defer sh.Unlock()
+func (sh *defaultSignalHandler) AddSignal(ch chan<- *Signal) {
+	sh.mu.Lock()
+	defer sh.mu.Unlock()
 	if sh.closed {
 		return
 	}
-	sh.signals = append(sh.signals, ch)
-
+	sh.signals = append(sh.signals, &signalChannelData{
+		ch:   ch,
+		done: make(chan struct{}),
+	})
 }
 
-func (sh *defaultSignalHandler) removeSignal(ch chan<- *Signal) {
-	sh.Lock()
-	defer sh.Unlock()
+func (sh *defaultSignalHandler) RemoveSignal(ch chan<- *Signal) {
+	sh.mu.Lock()
+	defer sh.mu.Unlock()
 	if sh.closed {
 		return
 	}
 	for i := len(sh.signals) - 1; i >= 0; i-- {
-		if ch == sh.signals[i] {
+		if ch == sh.signals[i].ch {
+			sh.signals[i].close()
 			copy(sh.signals[i:], sh.signals[i+1:])
 			sh.signals[len(sh.signals)-1] = nil
 			sh.signals = sh.signals[:len(sh.signals)-1]
 		}
 	}
 }
+
+type signalChannelData struct {
+	wg   sync.WaitGroup
+	ch   chan<- *Signal
+	done chan struct{}
+}
+
+func (scd *signalChannelData) deliver(signal *Signal) {
+	select {
+	case scd.ch <- signal:
+	case <-scd.done:
+		return
+	default:
+		scd.wg.Add(1)
+		go scd.deferredDeliver(signal)
+	}
+}
+
+func (scd *signalChannelData) deferredDeliver(signal *Signal) {
+	select {
+	case scd.ch <- signal:
+	case <-scd.done:
+	}
+	scd.wg.Done()
+}
+
+func (scd *signalChannelData) close() {
+	close(scd.done)
+	scd.wg.Wait() // wait until all spawned goroutines return
+}
diff --git a/vendor/github.com/godbus/dbus/doc.go b/vendor/github.com/godbus/dbus/v5/doc.go
index 895036a8c..ade1df951 100644
--- a/vendor/github.com/godbus/dbus/doc.go
+++ b/vendor/github.com/godbus/dbus/v5/doc.go
@@ -61,7 +61,7 @@ Handling Unix file descriptors deserves special mention. To use them, you should
 first check that they are supported on a connection by calling SupportsUnixFDs.
 If it returns true, all method of Connection will translate messages containing
 UnixFD's to messages that are accompanied by the given file descriptors with the
-UnixFD values being substituted by the correct indices. Similarily, the indices
+UnixFD values being substituted by the correct indices. Similarly, the indices
 of incoming messages are automatically resolved. It shouldn't be necessary to use
 UnixFDIndex.
 
diff --git a/vendor/github.com/godbus/dbus/encoder.go b/vendor/github.com/godbus/dbus/v5/encoder.go
index 8bb717761..adfbb75c5 100644
--- a/vendor/github.com/godbus/dbus/encoder.go
+++ b/vendor/github.com/godbus/dbus/v5/encoder.go
@@ -60,7 +60,7 @@ func (enc *encoder) binwrite(v interface{}) {
 	}
 }
 
-// Encode encodes the given values to the underyling reader. All written values
+// Encode encodes the given values to the underlying reader. All written values
 // are aligned properly as required by the D-Bus spec.
 func (enc *encoder) Encode(vs ...interface{}) (err error) {
 	defer func() {
diff --git a/vendor/github.com/godbus/dbus/export.go b/vendor/github.com/godbus/dbus/v5/export.go
index 95d0e2958..c277ab142 100644
--- a/vendor/github.com/godbus/dbus/export.go
+++ b/vendor/github.com/godbus/dbus/v5/export.go
@@ -171,7 +171,7 @@ func (conn *Conn) handleCall(msg *Message) {
 		}
 		reply.Headers[FieldSignature] = MakeVariant(SignatureOf(reply.Body...))
 
-		conn.sendMessage(reply)
+		conn.sendMessageAndIfClosed(reply, nil)
 	}
 }
 
diff --git a/vendor/github.com/godbus/dbus/v5/go.mod b/vendor/github.com/godbus/dbus/v5/go.mod
new file mode 100644
index 000000000..15b920203
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/v5/go.mod
@@ -0,0 +1,3 @@
+module github.com/godbus/dbus/v5
+
+go 1.12
diff --git a/vendor/github.com/godbus/dbus/v5/go.sum b/vendor/github.com/godbus/dbus/v5/go.sum
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/v5/go.sum
diff --git a/vendor/github.com/godbus/dbus/homedir.go b/vendor/github.com/godbus/dbus/v5/homedir.go
index 0b745f931..0b745f931 100644
--- a/vendor/github.com/godbus/dbus/homedir.go
+++ b/vendor/github.com/godbus/dbus/v5/homedir.go
diff --git a/vendor/github.com/godbus/dbus/homedir_dynamic.go b/vendor/github.com/godbus/dbus/v5/homedir_dynamic.go
index 2732081e7..2732081e7 100644
--- a/vendor/github.com/godbus/dbus/homedir_dynamic.go
+++ b/vendor/github.com/godbus/dbus/v5/homedir_dynamic.go
diff --git a/vendor/github.com/godbus/dbus/homedir_static.go b/vendor/github.com/godbus/dbus/v5/homedir_static.go
index b9d9cb552..b9d9cb552 100644
--- a/vendor/github.com/godbus/dbus/homedir_static.go
+++ b/vendor/github.com/godbus/dbus/v5/homedir_static.go
diff --git a/vendor/github.com/godbus/dbus/v5/match.go b/vendor/github.com/godbus/dbus/v5/match.go
new file mode 100644
index 000000000..086ee336a
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/v5/match.go
@@ -0,0 +1,62 @@
+package dbus
+
+import (
+	"strings"
+)
+
+// MatchOption specifies option for dbus routing match rule. Options can be constructed with WithMatch* helpers.
+// For full list of available options consult
+// https://dbus.freedesktop.org/doc/dbus-specification.html#message-bus-routing-match-rules
+type MatchOption struct {
+	key   string
+	value string
+}
+
+func formatMatchOptions(options []MatchOption) string {
+	items := make([]string, 0, len(options))
+	for _, option := range options {
+		items = append(items, option.key+"='"+option.value+"'")
+	}
+	return strings.Join(items, ",")
+}
+
+// WithMatchOption creates match option with given key and value
+func WithMatchOption(key, value string) MatchOption {
+	return MatchOption{key, value}
+}
+
+// doesn't make sense to export this option because clients can only
+// subscribe to messages with signal type.
+func withMatchType(typ string) MatchOption {
+	return WithMatchOption("type", typ)
+}
+
+// WithMatchSender sets sender match option.
+func WithMatchSender(sender string) MatchOption {
+	return WithMatchOption("sender", sender)
+}
+
+// WithMatchSender sets interface match option.
+func WithMatchInterface(iface string) MatchOption {
+	return WithMatchOption("interface", iface)
+}
+
+// WithMatchMember sets member match option.
+func WithMatchMember(member string) MatchOption {
+	return WithMatchOption("member", member)
+}
+
+// WithMatchObjectPath creates match option that filters events based on given path
+func WithMatchObjectPath(path ObjectPath) MatchOption {
+	return WithMatchOption("path", string(path))
+}
+
+// WithMatchPathNamespace sets path_namespace match option.
+func WithMatchPathNamespace(namespace ObjectPath) MatchOption {
+	return WithMatchOption("path_namespace", string(namespace))
+}
+
+// WithMatchDestination sets destination match option.
+func WithMatchDestination(destination string) MatchOption {
+	return WithMatchOption("destination", destination)
+}
diff --git a/vendor/github.com/godbus/dbus/message.go b/vendor/github.com/godbus/dbus/v5/message.go
index 6a925367e..6a925367e 100644
--- a/vendor/github.com/godbus/dbus/message.go
+++ b/vendor/github.com/godbus/dbus/v5/message.go
diff --git a/vendor/github.com/godbus/dbus/object.go b/vendor/github.com/godbus/dbus/v5/object.go
index 9309b9b40..8acd7fc8b 100644
--- a/vendor/github.com/godbus/dbus/object.go
+++ b/vendor/github.com/godbus/dbus/v5/object.go
@@ -38,41 +38,16 @@ func (o *Object) CallWithContext(ctx context.Context, method string, flags Flags
 	return <-o.createCall(ctx, method, flags, make(chan *Call, 1), args...).Done
 }
 
-// MatchOption specifies option for dbus routing match rule. Options can be constructed with WithMatch* helpers.
-// For full list of available options consult
-// https://dbus.freedesktop.org/doc/dbus-specification.html#message-bus-routing-match-rules
-type MatchOption struct {
-	key   string
-	value string
-}
-
-// WithMatchOption creates match option with given key and value
-func WithMatchOption(key, value string) MatchOption {
-	return MatchOption{key, value}
-}
-
-// WithMatchObjectPath creates match option that filters events based on given path
-func WithMatchObjectPath(path ObjectPath) MatchOption {
-	return MatchOption{"path", string(path)}
-}
-
-func formatMatchOptions(options []MatchOption) string {
-	items := make([]string, 0, len(options))
-	for _, option := range options {
-		items = append(items, option.key+"='"+option.value+"'")
-	}
-
-	return strings.Join(items, ",")
-}
-
 // AddMatchSignal subscribes BusObject to signals from specified interface,
 // method (member). Additional filter rules can be added via WithMatch* option constructors.
 // Note: To filter events by object path you have to specify this path via an option.
+//
+// Deprecated: use (*Conn) AddMatchSignal instead.
 func (o *Object) AddMatchSignal(iface, member string, options ...MatchOption) *Call {
 	base := []MatchOption{
-		{"type", "signal"},
-		{"interface", iface},
-		{"member", member},
+		withMatchType("signal"),
+		WithMatchInterface(iface),
+		WithMatchMember(member),
 	}
 
 	options = append(base, options...)
@@ -85,11 +60,13 @@ func (o *Object) AddMatchSignal(iface, member string, options ...MatchOption) *C
 
 // RemoveMatchSignal unsubscribes BusObject from signals from specified interface,
 // method (member). Additional filter rules can be added via WithMatch* option constructors
+//
+// Deprecated: use (*Conn) RemoveMatchSignal instead.
 func (o *Object) RemoveMatchSignal(iface, member string, options ...MatchOption) *Call {
 	base := []MatchOption{
-		{"type", "signal"},
-		{"interface", iface},
-		{"member", member},
+		withMatchType("signal"),
+		WithMatchInterface(iface),
+		WithMatchMember(member),
 	}
 
 	options = append(base, options...)
diff --git a/vendor/github.com/godbus/dbus/server_interfaces.go b/vendor/github.com/godbus/dbus/v5/server_interfaces.go
index 01166f0bd..79d97edf3 100644
--- a/vendor/github.com/godbus/dbus/server_interfaces.go
+++ b/vendor/github.com/godbus/dbus/v5/server_interfaces.go
@@ -77,6 +77,14 @@ type SignalHandler interface {
 	DeliverSignal(iface, name string, signal *Signal)
 }
 
+// SignalRegistrar manages signal delivery channels.
+//
+// This is an optional set of methods for `SignalHandler`.
+type SignalRegistrar interface {
+	AddSignal(ch chan<- *Signal)
+	RemoveSignal(ch chan<- *Signal)
+}
+
 // A DBusError is used to convert a generic object to a D-Bus error.
 //
 // Any custom error mechanism may implement this interface to provide
diff --git a/vendor/github.com/godbus/dbus/sig.go b/vendor/github.com/godbus/dbus/v5/sig.go
index c1b809202..c1b809202 100644
--- a/vendor/github.com/godbus/dbus/sig.go
+++ b/vendor/github.com/godbus/dbus/v5/sig.go
diff --git a/vendor/github.com/godbus/dbus/transport_darwin.go b/vendor/github.com/godbus/dbus/v5/transport_darwin.go
index 1bba0d6bf..1bba0d6bf 100644
--- a/vendor/github.com/godbus/dbus/transport_darwin.go
+++ b/vendor/github.com/godbus/dbus/v5/transport_darwin.go
diff --git a/vendor/github.com/godbus/dbus/transport_generic.go b/vendor/github.com/godbus/dbus/v5/transport_generic.go
index 718a1ff02..718a1ff02 100644
--- a/vendor/github.com/godbus/dbus/transport_generic.go
+++ b/vendor/github.com/godbus/dbus/v5/transport_generic.go
diff --git a/vendor/github.com/godbus/dbus/transport_nonce_tcp.go b/vendor/github.com/godbus/dbus/v5/transport_nonce_tcp.go
index 697739efa..697739efa 100644
--- a/vendor/github.com/godbus/dbus/transport_nonce_tcp.go
+++ b/vendor/github.com/godbus/dbus/v5/transport_nonce_tcp.go
diff --git a/vendor/github.com/godbus/dbus/transport_tcp.go b/vendor/github.com/godbus/dbus/v5/transport_tcp.go
index f91c9b7d7..f91c9b7d7 100644
--- a/vendor/github.com/godbus/dbus/transport_tcp.go
+++ b/vendor/github.com/godbus/dbus/v5/transport_tcp.go
diff --git a/vendor/github.com/godbus/dbus/transport_unix.go b/vendor/github.com/godbus/dbus/v5/transport_unix.go
index c7cd02f97..c7cd02f97 100644
--- a/vendor/github.com/godbus/dbus/transport_unix.go
+++ b/vendor/github.com/godbus/dbus/v5/transport_unix.go
diff --git a/vendor/github.com/godbus/dbus/transport_unixcred_dragonfly.go b/vendor/github.com/godbus/dbus/v5/transport_unixcred_dragonfly.go
index a8cd39395..a8cd39395 100644
--- a/vendor/github.com/godbus/dbus/transport_unixcred_dragonfly.go
+++ b/vendor/github.com/godbus/dbus/v5/transport_unixcred_dragonfly.go
diff --git a/vendor/github.com/godbus/dbus/transport_unixcred_freebsd.go b/vendor/github.com/godbus/dbus/v5/transport_unixcred_freebsd.go
index 0fc5b9273..0fc5b9273 100644
--- a/vendor/github.com/godbus/dbus/transport_unixcred_freebsd.go
+++ b/vendor/github.com/godbus/dbus/v5/transport_unixcred_freebsd.go
diff --git a/vendor/github.com/godbus/dbus/transport_unixcred_linux.go b/vendor/github.com/godbus/dbus/v5/transport_unixcred_linux.go
index d9dfdf698..d9dfdf698 100644
--- a/vendor/github.com/godbus/dbus/transport_unixcred_linux.go
+++ b/vendor/github.com/godbus/dbus/v5/transport_unixcred_linux.go
diff --git a/vendor/github.com/godbus/dbus/transport_unixcred_openbsd.go b/vendor/github.com/godbus/dbus/v5/transport_unixcred_openbsd.go
index af7bafdf9..af7bafdf9 100644
--- a/vendor/github.com/godbus/dbus/transport_unixcred_openbsd.go
+++ b/vendor/github.com/godbus/dbus/v5/transport_unixcred_openbsd.go
diff --git a/vendor/github.com/godbus/dbus/variant.go b/vendor/github.com/godbus/dbus/v5/variant.go
index 0ca123b01..5b51828c8 100644
--- a/vendor/github.com/godbus/dbus/variant.go
+++ b/vendor/github.com/godbus/dbus/v5/variant.go
@@ -26,7 +26,7 @@ func MakeVariantWithSignature(v interface{}, s Signature) Variant {
 }
 
 // ParseVariant parses the given string as a variant as described at
-// https://developer.gnome.org/glib/unstable/gvariant-text.html. If sig is not
+// https://developer.gnome.org/glib/stable/gvariant-text.html. If sig is not
 // empty, it is taken to be the expected signature for the variant.
 func ParseVariant(s string, sig Signature) (Variant, error) {
 	tokens := varLex(s)
@@ -129,7 +129,7 @@ func (v Variant) Signature() Signature {
 }
 
 // String returns the string representation of the underlying value of v as
-// described at https://developer.gnome.org/glib/unstable/gvariant-text.html.
+// described at https://developer.gnome.org/glib/stable/gvariant-text.html.
 func (v Variant) String() string {
 	s, unamb := v.format()
 	if !unamb {
diff --git a/vendor/github.com/godbus/dbus/variant_lexer.go b/vendor/github.com/godbus/dbus/v5/variant_lexer.go
index 332007d6f..bf1398c8f 100644
--- a/vendor/github.com/godbus/dbus/variant_lexer.go
+++ b/vendor/github.com/godbus/dbus/v5/variant_lexer.go
@@ -51,7 +51,7 @@ func varLex(s string) []varToken {
 }
 
 func (l *varLexer) accept(valid string) bool {
-	if strings.IndexRune(valid, l.next()) >= 0 {
+	if strings.ContainsRune(valid, l.next()) {
 		return true
 	}
 	l.backup()
@@ -214,17 +214,17 @@ func varLexNumber(l *varLexer) lexState {
 			digits = "01234567"
 		}
 	}
-	for strings.IndexRune(digits, l.next()) >= 0 {
+	for strings.ContainsRune(digits, l.next()) {
 	}
 	l.backup()
 	if l.accept(".") {
-		for strings.IndexRune(digits, l.next()) >= 0 {
+		for strings.ContainsRune(digits, l.next()) {
 		}
 		l.backup()
 	}
 	if l.accept("eE") {
 		l.accept("+-")
-		for strings.IndexRune("0123456789", l.next()) >= 0 {
+		for strings.ContainsRune("0123456789", l.next()) {
 		}
 		l.backup()
 	}
diff --git a/vendor/github.com/godbus/dbus/variant_parser.go b/vendor/github.com/godbus/dbus/v5/variant_parser.go
index d20f5da6d..d20f5da6d 100644
--- a/vendor/github.com/godbus/dbus/variant_parser.go
+++ b/vendor/github.com/godbus/dbus/v5/variant_parser.go