1 files changed, 302 insertions, 0 deletions
diff --git a/vendor/src/github.com/godbus/dbus/export.go b/vendor/src/github.com/godbus/dbus/export.go
new file mode 100644
index 0000000000..1dd1591528
--- /dev/null
+++ b/vendor/src/github.com/godbus/dbus/export.go
@@ -0,0 +1,302 @@
+package dbus
+
+import (
+	"errors"
+	"reflect"
+	"strings"
+	"unicode"
+)
+
+var (
+	errmsgInvalidArg = Error{
+		"org.freedesktop.DBus.Error.InvalidArgs",
+		[]interface{}{"Invalid type / number of args"},
+	}
+	errmsgNoObject = Error{
+		"org.freedesktop.DBus.Error.NoSuchObject",
+		[]interface{}{"No such object"},
+	}
+	errmsgUnknownMethod = Error{
+		"org.freedesktop.DBus.Error.UnknownMethod",
+		[]interface{}{"Unknown / invalid method"},
+	}
+)
+
+// Sender is a type which can be used in exported methods to receive the message
+// sender.
+type Sender string
+
+func exportedMethod(v interface{}, name string) reflect.Value {
+	if v == nil {
+		return reflect.Value{}
+	}
+	m := reflect.ValueOf(v).MethodByName(name)
+	if !m.IsValid() {
+		return reflect.Value{}
+	}
+	t := m.Type()
+	if t.NumOut() == 0 ||
+		t.Out(t.NumOut()-1) != reflect.TypeOf(&errmsgInvalidArg) {
+
+		return reflect.Value{}
+	}
+	return m
+}
+
+// handleCall handles the given method call (i.e. looks if it's one of the
+// pre-implemented ones and searches for a corresponding handler if not).
+func (conn *Conn) handleCall(msg *Message) {
+	name := msg.Headers[FieldMember].value.(string)
+	path := msg.Headers[FieldPath].value.(ObjectPath)
+	ifaceName, hasIface := msg.Headers[FieldInterface].value.(string)
+	sender, hasSender := msg.Headers[FieldSender].value.(string)
+	serial := msg.serial
+	if ifaceName == "org.freedesktop.DBus.Peer" {
+		switch name {
+		case "Ping":
+			conn.sendReply(sender, serial)
+		case "GetMachineId":
+			conn.sendReply(sender, serial, conn.uuid)
+		default:
+			conn.sendError(errmsgUnknownMethod, sender, serial)
+		}
+		return
+	}
+	if len(name) == 0 || unicode.IsLower([]rune(name)[0]) {
+		conn.sendError(errmsgUnknownMethod, sender, serial)
+	}
+	var m reflect.Value
+	if hasIface {
+		conn.handlersLck.RLock()
+		obj, ok := conn.handlers[path]
+		if !ok {
+			conn.sendError(errmsgNoObject, sender, serial)
+			conn.handlersLck.RUnlock()
+			return
+		}
+		iface := obj[ifaceName]
+		conn.handlersLck.RUnlock()
+		m = exportedMethod(iface, name)
+	} else {
+		conn.handlersLck.RLock()
+		if _, ok := conn.handlers[path]; !ok {
+			conn.sendError(errmsgNoObject, sender, serial)
+			conn.handlersLck.RUnlock()
+			return
+		}
+		for _, v := range conn.handlers[path] {
+			m = exportedMethod(v, name)
+			if m.IsValid() {
+				break
+			}
+		}
+		conn.handlersLck.RUnlock()
+	}
+	if !m.IsValid() {
+		conn.sendError(errmsgUnknownMethod, sender, serial)
+		return
+	}
+	t := m.Type()
+	vs := msg.Body
+	pointers := make([]interface{}, t.NumIn())
+	decode := make([]interface{}, 0, len(vs))
+	for i := 0; i < t.NumIn(); i++ {
+		tp := t.In(i)
+		val := reflect.New(tp)
+		pointers[i] = val.Interface()
+		if tp == reflect.TypeOf((*Sender)(nil)).Elem() {
+			val.Elem().SetString(sender)
+		} else {
+			decode = append(decode, pointers[i])
+		}
+	}
+	if len(decode) != len(vs) {
+		conn.sendError(errmsgInvalidArg, sender, serial)
+		return
+	}
+	if err := Store(vs, decode...); err != nil {
+		conn.sendError(errmsgInvalidArg, sender, serial)
+		return
+	}
+	params := make([]reflect.Value, len(pointers))
+	for i := 0; i < len(pointers); i++ {
+		params[i] = reflect.ValueOf(pointers[i]).Elem()
+	}
+	ret := m.Call(params)
+	if em := ret[t.NumOut()-1].Interface().(*Error); em != nil {
+		conn.sendError(*em, sender, serial)
+		return
+	}
+	if msg.Flags&FlagNoReplyExpected == 0 {
+		reply := new(Message)
+		reply.Type = TypeMethodReply
+		reply.serial = conn.getSerial()
+		reply.Headers = make(map[HeaderField]Variant)
+		if hasSender {
+			reply.Headers[FieldDestination] = msg.Headers[FieldSender]
+		}
+		reply.Headers[FieldReplySerial] = MakeVariant(msg.serial)
+		reply.Body = make([]interface{}, len(ret)-1)
+		for i := 0; i < len(ret)-1; i++ {
+			reply.Body[i] = ret[i].Interface()
+		}
+		if len(ret) != 1 {
+			reply.Headers[FieldSignature] = MakeVariant(SignatureOf(reply.Body...))
+		}
+		conn.outLck.RLock()
+		if !conn.closed {
+			conn.out <- reply
+		}
+		conn.outLck.RUnlock()
+	}
+}
+
+// Emit emits the given signal on the message bus. The name parameter must be
+// formatted as "interface.member", e.g., "org.freedesktop.DBus.NameLost".
+func (conn *Conn) Emit(path ObjectPath, name string, values ...interface{}) error {
+	if !path.IsValid() {
+		return errors.New("dbus: invalid object path")
+	}
+	i := strings.LastIndex(name, ".")
+	if i == -1 {
+		return errors.New("dbus: invalid method name")
+	}
+	iface := name[:i]
+	member := name[i+1:]
+	if !isValidMember(member) {
+		return errors.New("dbus: invalid method name")
+	}
+	if !isValidInterface(iface) {
+		return errors.New("dbus: invalid interface name")
+	}
+	msg := new(Message)
+	msg.Type = TypeSignal
+	msg.serial = conn.getSerial()
+	msg.Headers = make(map[HeaderField]Variant)
+	msg.Headers[FieldInterface] = MakeVariant(iface)
+	msg.Headers[FieldMember] = MakeVariant(member)
+	msg.Headers[FieldPath] = MakeVariant(path)
+	msg.Body = values
+	if len(values) > 0 {
+		msg.Headers[FieldSignature] = MakeVariant(SignatureOf(values...))
+	}
+	conn.outLck.RLock()
+	defer conn.outLck.RUnlock()
+	if conn.closed {
+		return ErrClosed
+	}
+	conn.out <- msg
+	return nil
+}
+
+// Export registers the given value to be exported as an object on the
+// message bus.
+//
+// If a method call on the given path and interface is received, an exported
+// method with the same name is called with v as the receiver if the
+// parameters match and the last return value is of type *Error. If this
+// *Error is not nil, it is sent back to the caller as an error.
+// Otherwise, a method reply is sent with the other return values as its body.
+//
+// Any parameters with the special type Sender are set to the sender of the
+// dbus message when the method is called. Parameters of this type do not
+// contribute to the dbus signature of the method (i.e. the method is exposed
+// as if the parameters of type Sender were not there).
+//
+// Every method call is executed in a new goroutine, so the method may be called
+// in multiple goroutines at once.
+//
+// Method calls on the interface org.freedesktop.DBus.Peer will be automatically
+// handled for every object.
+//
+// Passing nil as the first parameter will cause conn to cease handling calls on
+// the given combination of path and interface.
+//
+// Export returns an error if path is not a valid path name.
+func (conn *Conn) Export(v interface{}, path ObjectPath, iface string) error {
+	if !path.IsValid() {
+		return errors.New("dbus: invalid path name")
+	}
+	conn.handlersLck.Lock()
+	if v == nil {
+		if _, ok := conn.handlers[path]; ok {
+			delete(conn.handlers[path], iface)
+			if len(conn.handlers[path]) == 0 {
+				delete(conn.handlers, path)
+			}
+		}
+		return nil
+	}
+	if _, ok := conn.handlers[path]; !ok {
+		conn.handlers[path] = make(map[string]interface{})
+	}
+	conn.handlers[path][iface] = v
+	conn.handlersLck.Unlock()
+	return nil
+}
+
+// ReleaseName calls org.freedesktop.DBus.ReleaseName. You should use only this
+// method to release a name (see below).
+func (conn *Conn) ReleaseName(name string) (ReleaseNameReply, error) {
+	var r uint32
+	err := conn.busObj.Call("org.freedesktop.DBus.ReleaseName", 0, name).Store(&r)
+	if err != nil {
+		return 0, err
+	}
+	if r == uint32(ReleaseNameReplyReleased) {
+		conn.namesLck.Lock()
+		for i, v := range conn.names {
+			if v == name {
+				copy(conn.names[i:], conn.names[i+1:])
+				conn.names = conn.names[:len(conn.names)-1]
+			}
+		}
+		conn.namesLck.Unlock()
+	}
+	return ReleaseNameReply(r), nil
+}
+
+// RequestName calls org.freedesktop.DBus.RequestName. You should use only this
+// method to request a name because package dbus needs to keep track of all
+// names that the connection has.
+func (conn *Conn) RequestName(name string, flags RequestNameFlags) (RequestNameReply, error) {
+	var r uint32
+	err := conn.busObj.Call("org.freedesktop.DBus.RequestName", 0, name, flags).Store(&r)
+	if err != nil {
+		return 0, err
+	}
+	if r == uint32(RequestNameReplyPrimaryOwner) {
+		conn.namesLck.Lock()
+		conn.names = append(conn.names, name)
+		conn.namesLck.Unlock()
+	}
+	return RequestNameReply(r), nil
+}
+
+// ReleaseNameReply is the reply to a ReleaseName call.
+type ReleaseNameReply uint32
+
+const (
+	ReleaseNameReplyReleased ReleaseNameReply = 1 + iota
+	ReleaseNameReplyNonExistent
+	ReleaseNameReplyNotOwner
+)
+
+// RequestNameFlags represents the possible flags for a RequestName call.
+type RequestNameFlags uint32
+
+const (
+	NameFlagAllowReplacement RequestNameFlags = 1 << iota
+	NameFlagReplaceExisting
+	NameFlagDoNotQueue
+)
+
+// RequestNameReply is the reply to a RequestName call.
+type RequestNameReply uint32
+
+const (
+	RequestNameReplyPrimaryOwner RequestNameReply = 1 + iota
+	RequestNameReplyInQueue
+	RequestNameReplyExists
+	RequestNameReplyAlreadyOwner
+)