Golang dbus.Store函数代码示例

// DisableUnitFiles() may be used to disable one or more units in the system (by
// removing symlinks to them from /etc or /run).
//
// It takes a list of unit files to disable (either just file names or full
// absolute paths if the unit files are residing outside the usual unit
// search paths), and one boolean: whether the unit was enabled for runtime
// only (true, /run), or persistently (false, /etc).
//
// This call returns an array with the changes made. The changes list
// consists of structures with three strings: the type of the change (one of
// symlink or unlink), the file name of the symlink and the destination of the
// symlink.
func (c *Conn) DisableUnitFiles(files []string, runtime bool) ([]DisableUnitFileChange, error) {
	result := make([][]interface{}, 0)
	err := c.sysobj.Call("org.freedesktop.systemd1.Manager.DisableUnitFiles", 0, files, runtime).Store(&result)
	if err != nil {
		return nil, err
	}

	resultInterface := make([]interface{}, len(result))
	for i := range result {
		resultInterface[i] = result[i]
	}

	changes := make([]DisableUnitFileChange, len(result))
	changesInterface := make([]interface{}, len(changes))
	for i := range changes {
		changesInterface[i] = &changes[i]
	}

	err = dbus.Store(resultInterface, changesInterface...)
	if err != nil {
		return nil, err
	}

	return changes, nil
}

// ListFileUnits returns an array -> `systemctl list-unit-files`.
func (c *Conn) ListUnitFiles() ([]UnitFileStatus, error) {
	result := make([][]interface{}, 0)
	err := c.sysobj.Call("org.freedesktop.systemd1.Manager.ListUnitFiles", 0).Store(&result)
	if err != nil {
		return nil, err
	}

	resultInterface := make([]interface{}, len(result))
	for i := range result {
		resultInterface[i] = result[i]
	}

	status := make([]UnitFileStatus, len(result))
	statusInterface := make([]interface{}, len(status))
	for i := range status {
		statusInterface[i] = &status[i]
	}

	err = dbus.Store(resultInterface, statusInterface...)
	if err != nil {
		return nil, err
	}

	return status, nil
}

// EnableUnitFiles() may be used to enable one or more units in the system (by
// creating symlinks to them in /etc or /run).
//
// It takes a list of unit files to enable (either just file names or full
// absolute paths if the unit files are residing outside the usual unit
// search paths), and two booleans: the first controls whether the unit shall
// be enabled for runtime only (true, /run), or persistently (false, /etc).
// The second one controls whether symlinks pointing to other units shall
// be replaced if necessary.
//
// This call returns one boolean and an array with the changes made. The
// boolean signals whether the unit files contained any enablement
// information (i.e. an [Install]) section. The changes list consists of
// structures with three strings: the type of the change (one of symlink
// or unlink), the file name of the symlink and the destination of the
// symlink.
func (c *Conn) EnableUnitFiles(files []string, runtime bool, force bool) (bool, []EnableUnitFileChange, error) {
	var carries_install_info bool

	result := make([][]interface{}, 0)
	err := c.sysobj.Call("org.freedesktop.systemd1.Manager.EnableUnitFiles", 0, files, runtime, force).Store(&carries_install_info, &result)
	if err != nil {
		return false, nil, err
	}

	resultInterface := make([]interface{}, len(result))
	for i := range result {
		resultInterface[i] = result[i]
	}

	changes := make([]EnableUnitFileChange, len(result))
	changesInterface := make([]interface{}, len(changes))
	for i := range changes {
		changesInterface[i] = &changes[i]
	}

	err = dbus.Store(resultInterface, changesInterface...)
	if err != nil {
		return false, nil, err
	}

	return carries_install_info, changes, nil
}

func (c *Conn) listUnitsInternal(f storeFunc) ([]UnitStatus, error) {
	result := make([][]interface{}, 0)
	err := f(&result)
	if err != nil {
		return nil, err
	}

	resultInterface := make([]interface{}, len(result))
	for i := range result {
		resultInterface[i] = result[i]
	}

	status := make([]UnitStatus, len(result))
	statusInterface := make([]interface{}, len(status))
	for i := range status {
		statusInterface[i] = &status[i]
	}

	err = dbus.Store(resultInterface, statusInterface...)
	if err != nil {
		return nil, err
	}

	return status, nil
}

func (c *Conn) listUnitFilesInternal(f storeFunc) ([]UnitFile, error) {
	result := make([][]interface{}, 0)
	err := f(&result)
	if err != nil {
		return nil, err
	}

	resultInterface := make([]interface{}, len(result))
	for i := range result {
		resultInterface[i] = result[i]
	}

	files := make([]UnitFile, len(result))
	fileInterface := make([]interface{}, len(files))
	for i := range files {
		fileInterface[i] = &files[i]
	}

	err = dbus.Store(resultInterface, fileInterface...)
	if err != nil {
		return nil, err
	}

	return files, nil
}

// ListUnitFiles returns an array of all available units on disk.
func (c *Conn) ListUnitFiles() ([]UnitFile, error) {
	result := make([][]interface{}, 0)
	err := c.sysobj.Call("org.freedesktop.systemd1.Manager.ListUnitFiles", 0).Store(&result)
	if err != nil {
		return nil, err
	}

	resultInterface := make([]interface{}, len(result))
	for i := range result {
		resultInterface[i] = result[i]
	}

	files := make([]UnitFile, len(result))
	fileInterface := make([]interface{}, len(files))
	for i := range files {
		fileInterface[i] = &files[i]
	}

	err = dbus.Store(resultInterface, fileInterface...)
	if err != nil {
		return nil, err
	}

	return files, nil
}

func (c *logindDbus) listSessions() ([]logindSessionEntry, error) {
	var result [][]interface{}
	err := c.object.Call(dbusObject+".Manager.ListSessions", 0).Store(&result)
	if err != nil {
		return nil, err
	}

	resultInterface := make([]interface{}, len(result))
	for i := range result {
		resultInterface[i] = result[i]
	}

	sessions := make([]logindSessionEntry, len(result))
	sessionsInterface := make([]interface{}, len(sessions))
	for i := range sessions {
		sessionsInterface[i] = &sessions[i]
	}

	err = dbus.Store(resultInterface, sessionsInterface...)
	if err != nil {
		return nil, err
	}

	return sessions, nil
}

func (c *logindDbus) listSeats() ([]string, error) {
	var result [][]interface{}
	err := c.object.Call(dbusObject+".Manager.ListSeats", 0).Store(&result)
	if err != nil {
		return nil, err
	}

	resultInterface := make([]interface{}, len(result))
	for i := range result {
		resultInterface[i] = result[i]
	}

	seats := make([]logindSeatEntry, len(result))
	seatsInterface := make([]interface{}, len(seats))
	for i := range seats {
		seatsInterface[i] = &seats[i]
	}

	err = dbus.Store(resultInterface, seatsInterface...)
	if err != nil {
		return nil, err
	}

	ret := make([]string, len(seats)+1)
	for i := range seats {
		ret[i] = seats[i].SeatId
	}
	// Always add the empty seat, which is used for remote sessions like SSH
	ret[len(seats)] = ""

	return ret, nil
}

// Check whether the InterfacesAdded signal contains deviceInterface
// See http://dbus.freedesktop.org/doc/dbus-specification.html#standard-interfaces-objectmanager
func containsDevice(s *dbus.Signal) bool {
	var dict map[string]map[string]dbus.Variant
	err := dbus.Store(s.Body[1:2], &dict)
	if err != nil {
		return false
	}
	return dict[deviceInterface] != nil
}

func (m *unitMonitor) watch() error {

	conn, err := dbus.SystemBus()
	if err != nil {
		return err
	}

	m.path = m.getUnitPath()

	// subscribe the props changes signal
	props := fmt.Sprintf("type='signal',path='%s',interface='org.freedesktop.DBus.Properties'", m.path)
	call := conn.BusObject().Call("org.freedesktop.DBus.AddMatch", 0, props)
	if call != nil && call.Err != nil {
		return call.Err
	}

	// unsubscribe on return
	defer func() {
		conn.BusObject().Call("org.freedesktop.DBus.RemoveMatch", 0, props)
	}()

	signal := make(chan *dbus.Signal, 10)
	defer close(signal)

	conn.Signal(signal)

	log.Printf("watching for %s @%s\n", m.name, m.path)

	for {
		select {
		case ev := <-signal:
			switch ev.Name {
			case propertiesChanged:
				var iName string
				var changedProps map[string]dbus.Variant
				var invProps []string

				if ev.Path == m.path {
					if err := dbus.Store(ev.Body, &iName, &changedProps, &invProps); err != nil {
						log.Println(err.Error())
						log.Println("aku dead")
						continue
					}

					if iName == "org.freedesktop.systemd1.Unit" {
						m.chanPub <- m.generateStatus()
					}
				}
			}

		case <-m.done:
			return nil

		}
	}

	return nil
}

func (c *Conn) jobComplete(signal *dbus.Signal) {
	var id uint32
	var job dbus.ObjectPath
	var unit string
	var result string
	dbus.Store(signal.Body, &id, &job, &unit, &result)
	c.jobListener.Lock()
	out, ok := c.jobListener.jobs[job]
	if ok {
		out <- result
	}
	c.jobListener.Unlock()
}

func applyHandler(s *dbus.Signal) {
	handler := notifyHandler[s.Path]
	if handler == nil {
		log.Printf("%s: no notify handler", s.Path)
		return
	}
	// Reflection used by dbus.Store() requires explicit type here.
	var changed map[string]dbus.Variant
	dbus.Store(s.Body[1:2], &changed)
	keys := []string{}
	for k, _ := range changed {
		keys = append(keys, k)
	}
	data, ok := changed["Value"].Value().([]byte)
	if ok {
		go handler(data)
	}
}

// Store is part of the Call interface
func (call *fakeCall) Store(retvalues ...interface{}) error {
	if call.err != nil {
		return call.err
	}
	return godbus.Store(call.ret, retvalues...)
}