QDBusConnectionInterface#

The QDBusConnectionInterface class provides access to the D-Bus bus daemon service. More

Synopsis#

Functions#

Signals#

Detailed Description#

The D-Bus bus server daemon provides one special interface org.freedesktop.DBus that allows clients to access certain properties of the bus, such as the current list of clients connected. The QDBusConnectionInterface class provides access to that interface.

The most common uses of this class are to register and unregister service names on the bus using the registerService() and unregisterService() functions, query about existing names using the isServiceRegistered() , registeredServiceNames() and serviceOwner() functions, and to receive notification that a client has registered or de-registered through the serviceRegistered() , serviceUnregistered() and signals.

class PySide6.QtDBus.QDBusConnectionInterface#
PySide6.QtDBus.QDBusConnectionInterface.ServiceQueueOptions#

Flags for determining how a service registration should behave, in case the service name is already registered.

Constant

Description

QDBusConnectionInterface.DontQueueService

If an application requests a name that is already owned, no queueing will be performed. The registeredService() call will simply fail. This is the default.

QDBusConnectionInterface.QueueService

Attempts to register the requested service, but do not try to replace it if another application already has it registered. Instead, simply put this application in queue, until it is given up. The serviceRegistered() signal will be emitted when that happens.

QDBusConnectionInterface.ReplaceExistingService

If another application already has the service name registered, attempt to replace it.

See also

ServiceReplacementOptions

PySide6.QtDBus.QDBusConnectionInterface.ServiceReplacementOptions#

Flags for determining if the D-Bus server should allow another application to replace a name that this application has registered with the ReplaceExistingService option.

The possible values are:

Constant

Description

QDBusConnectionInterface.DontAllowReplacement

Do not allow another application to replace us. The service must be explicitly unregistered with unregisterService() for another application to acquire it. This is the default.

QDBusConnectionInterface.AllowReplacement

Allow other applications to replace us with the ReplaceExistingService option to registerService() without intervention. If that happens, the serviceUnregistered() signal will be emitted.

See also

ServiceQueueOptions

PySide6.QtDBus.QDBusConnectionInterface.RegisterServiceReply#

The possible return values from registerService() :

Constant

Description

QDBusConnectionInterface.ServiceNotRegistered

The call failed and the service name was not registered.

QDBusConnectionInterface.ServiceRegistered

The caller is now the owner of the service name.

QDBusConnectionInterface.ServiceQueued

The caller specified the QueueService flag and the service was already registered, so we are in queue.

The serviceRegistered() signal will be emitted when the service is acquired by this application.

PySide6.QtDBus.QDBusConnectionInterface.NameAcquired(arg__1)#
Parameters

arg__1 – str

PySide6.QtDBus.QDBusConnectionInterface.NameLost(arg__1)#
Parameters

arg__1 – str

PySide6.QtDBus.QDBusConnectionInterface.NameOwnerChanged(arg__1, arg__2, arg__3)#
Parameters
  • arg__1 – str

  • arg__2 – str

  • arg__3 – str

PySide6.QtDBus.QDBusConnectionInterface.activatableServiceNames()#
Return type

QDBusReply

PySide6.QtDBus.QDBusConnectionInterface.callWithCallbackFailed(error, call)#
Parameters
PySide6.QtDBus.QDBusConnectionInterface.isServiceRegistered(arg__1)#
Parameters

arg__1 – str

Return type

QDBusReply

Returns true if the service name serviceName has is currently registered.

PySide6.QtDBus.QDBusConnectionInterface.registerService(arg__1, arg__2, arg__3)#
Parameters
Return type

QDBusReply

Requests to register the service name serviceName on the bus. The qoption flag specifies how the D-Bus server should behave if serviceName is already registered. The roption flag specifies if the server should allow another application to replace our registered name.

If the service registration succeeds, the serviceRegistered() signal will be emitted. If we are placed in queue, the signal will be emitted when we obtain the name. If roption is AllowReplacement , the serviceUnregistered() signal will be emitted if another application replaces this one.

PySide6.QtDBus.QDBusConnectionInterface.registeredServiceNames()#
Return type

QDBusReply

PySide6.QtDBus.QDBusConnectionInterface.serviceOwner(arg__1)#
Parameters

arg__1 – str

Return type

QDBusReply

Returns the unique connection name of the primary owner of the name name. If the requested name doesn’t have an owner, returns a org.freedesktop.DBus.Error.NameHasNoOwner error.

PySide6.QtDBus.QDBusConnectionInterface.serviceOwnerChanged(name, oldOwner, newOwner)#
Parameters
  • name – str

  • oldOwner – str

  • newOwner – str

PySide6.QtDBus.QDBusConnectionInterface.servicePid(arg__1)#
Parameters

arg__1 – str

Return type

QDBusReply

Returns the Unix Process ID (PID) for the process currently holding the bus service serviceName.

PySide6.QtDBus.QDBusConnectionInterface.serviceRegistered(service)#
Parameters

service – str

PySide6.QtDBus.QDBusConnectionInterface.serviceUid(arg__1)#
Parameters

arg__1 – str

Return type

QDBusReply

Returns the Unix User ID (UID) for the process currently holding the bus service serviceName.

PySide6.QtDBus.QDBusConnectionInterface.serviceUnregistered(service)#
Parameters

service – str

PySide6.QtDBus.QDBusConnectionInterface.startService(arg__1)#
Parameters

arg__1 – str

Return type

QDBusReply

Requests that the bus start the service given by the name name.

PySide6.QtDBus.QDBusConnectionInterface.unregisterService(arg__1)#
Parameters

arg__1 – str

Return type

QDBusReply

Releases the claim on the bus service name serviceName, that had been previously registered with registerService() . If this application had ownership of the name, it will be released for other applications to claim. If it only had the name queued, it gives up its position in the queue.