An active client session to a message bus. Clients may send or receive method calls, and listen for or emit signals.

Connect to the bus at the specified address.

Throws a ClientError on failure.

Connect to the bus specified in the environment variable DBUS_SYSTEM_BUS_ADDRESS, or to unix:path=/var/run/dbus/system_bus_socket if DBUS_SYSTEM_BUS_ADDRESS is not set.

Throws a ClientError if DBUS_SYSTEM_BUS_ADDRESS contains an invalid address, or if connecting to the bus failed.

Connect to the bus specified in the environment variable DBUS_SESSION_BUS_ADDRESS, which must be set.

Throws a ClientError if DBUS_SESSION_BUS_ADDRESS is unset, contains an invalid address, or if connecting to the bus failed.

Connect to the bus specified in the environment variable DBUS_STARTER_ADDRESS, which must be set.

Throws a ClientError if DBUS_STARTER_ADDRESS is unset, contains an invalid address, or if connecting to the bus failed.

Stop a Client's callback thread and close its underlying socket.

Send a method call to the bus, and wait for the response.

Throws a ClientError if the method call couldn't be sent, or if the reply couldn't be parsed.

Send a method call to the bus, and wait for the response.

Unsets the noReplyExpected message flag before sending.

Throws a ClientError if the method call couldn't sent, if the reply couldn't be parsed, or if the reply was a MethodError.

Send a method call to the bus, and do not wait for a response.

Sets the noReplyExpected message flag before sending.

Throws a ClientError if the method call couldn't be sent.

Export the given functions under the given ObjectPath and InterfaceName.

Use autoMethod to construct a Method from a function that accepts and returns simple types.

Use method to construct a Method from a function that handles parameter conversion manually.

ping :: MethodCall -> IO Reply
ping _ = replyReturn []

sayHello :: String -> IO String
sayHello name = return ("Hello " ++ name ++ "!")

export client "/hello_world"
    [ method "com.example.HelloWorld" "Ping" ping
    , autoMethod "com.example.HelloWorld" "Hello" sayHello
    ]
 

Revokes the export of the given ObjectPath. This will remove all interfaces and methods associated with the path.

Define a method handler, which will accept method calls with the given interface and member name.

Note that the input and output parameter signatures are used for introspection, but are not checked when executing a method.

See autoMethod for an easier way to export functions with simple parameter and return types.

Reply to a method call with a successful return, containing the given body.

Reply to a method call with an error, containing the given error name and body.

Typically, the first item of the error body is a string with a message describing the error.

Normally, any exceptions raised while executing a method will be given the generic "org.freedesktop.DBus.Error.Failed" name. throwError allows the programmer to specify an error name, and provide additional information to the remote application. You may use this instead of throwIO to abort a method call.

Used to automatically generate method signatures for introspection documents. To support automatic signatures, a method's parameters and return value must all be instances of IsValue.

This class maps Haskell idioms to D-Bus; it is therefore unable to generate some signatures. In particular, it does not support methods which accept/return a single structure, or single-element structures. It also cannot generate signatures for methods with parameters or return values which are only instances of IsVariant. For these cases, please use method.

To match common Haskell use, if the return value is a tuple, it will be converted to a list of return values.

Prepare a Haskell function for export, automatically detecting the function's type signature.

See AutoMethod for details on the limitations of this function.

See method for exporting functions with user-defined types.

Request that the bus forward signals matching the given rule to this client, and process them in a callback.

A received signal might be processed by more than one callback at a time. Callbacks each run in their own thread.

The returned SignalHandler can be passed to removeMatch to stop handling this signal.

Throws a ClientError if the match rule couldn't be added to the bus.

Request that the bus stop forwarding signals for the given handler.

Throws a ClientError if the match rule couldn't be removed from the bus.

Emit the signal on the bus.

Throws a ClientError if the signal message couldn't be sent.

Equivalent to addMatch, but does not return the added SignalHandler.

A match rule describes which signals a particular callback is interested in. Use matchAny to construct match rules.

Example: a match rule which matches signals sent by the root object.

matchFromRoot :: MatchRule
matchFromRoot = matchAny { matchPath = Just "/" }
 

Convert a match rule into the textual format accepted by the bus.

Match any signal.

If set, only receives signals sent from the given bus name.

The standard D-Bus implementation from http://dbus.freedesktop.org/ almost always sets signal senders to the unique name of the sending client. If matchSender is a requested name like "com.example.Foo", it will not match any signals.

The exception is for signals sent by the bus itself, which always have a sender of "org.freedesktop.DBus".

If set, only receives signals sent to the given bus name.

If set, only receives signals sent with the given path.

If set, only receives signals sent with the given interface name.

If set, only receives signals sent with the given member name.

If set, only receives signals sent with the given path or any of its children.

Asks the message bus to assign the given name to this client. The bus maintains a queue of possible owners, where the head of the queue is the current ("primary") owner.

There are several uses for name reservation:

• Clients which export methods reserve a name so users and applications can send them messages. For example, the GNOME Keyring reserves the name "org.gnome.keyring" on the user's session bus, and NetworkManager reserves "org.freedesktop.NetworkManager" on the system bus.
• When there are multiple implementations of a particular service, the service standard will ususally include a generic bus name for the service. This allows other clients to avoid depending on any particular implementation's name. For example, both the GNOME Keyring and KDE KWallet services request the "org.freedesktop.secrets" name on the user's session bus.
• A process with "single instance" behavior can use name assignment to check whether the instance is already running, and invoke some method on it (e.g. opening a new window).

Throws a ClientError if the call failed.

Release a name that this client previously requested. See requestName for an explanation of name reservation.

Throws a ClientError if the call failed.

Allow this client's reservation to be replaced, if another client requests it with the nameReplaceExisting flag.

If this client's reservation is replaced, this client will be added to the wait queue unless the request also included the nameDoNotQueue flag.

If the name being requested is already reserved, attempt to replace it. This only works if the current owner provided the nameAllowReplacement flag.

If the name is already in use, do not add this client to the queue, just return an error.

Options for the underlying socket, for advanced use cases. See the DBus.Socket module.

A function to run the client thread. The provided IO computation should be called repeatedly; each time it is called, it will process one incoming message.

The provided computation will throw a ClientError if it fails to process an incoming message, or if the connection is lost.

The default implementation is forever.

Default client options. Uses the built-in Socket-based transport, which supports the tcp: and unix: methods.

Connect to the bus at the specified address, with the given connection options. Most users should use connect instead.

Throws a ClientError on failure.