Class: DBus::ASessionBus

Inherits:
Connection show all
Defined in:
lib/dbus/bus.rb

Overview

D-Bus session bus class

The session bus is a session specific bus (mostly for desktop use).

Use SessionBus, the non-singleton ASessionBus is for the test suite.

Direct Known Subclasses

SessionBus

Constant Summary

Constants inherited from Connection

Connection::DBUSXMLINTRO, Connection::MSG_BUF_SIZE, Connection::NAME_FLAG_ALLOW_REPLACEMENT, Connection::NAME_FLAG_DO_NOT_QUEUE, Connection::NAME_FLAG_REPLACE_EXISTING, Connection::REQUEST_NAME_REPLY_ALREADY_OWNER, Connection::REQUEST_NAME_REPLY_EXISTS, Connection::REQUEST_NAME_REPLY_IN_QUEUE, Connection::REQUEST_NAME_REPLY_PRIMARY_OWNER

Instance Attribute Summary

Attributes inherited from Connection

#socket, #unique_name

Instance Method Summary collapse

Methods inherited from Connection

#add_match, #connect, #connect_to_launchd, #connect_to_tcp, #connect_to_unix, #emit, #glibize, #introspect, #introspect_data, #messages, #on_return, #poll_messages, #pop_message, #process, #proxy, #remove_match, #request_service, #send, #send_sync, #send_sync_or_async, #service, #update_buffer, #wait_for_message

Constructor Details

#initialize ⇒ ASessionBus

Get the the default session bus.



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# File 'lib/dbus/bus.rb', line 731

def initialize
  super(ENV["DBUS_SESSION_BUS_ADDRESS"] || address_from_file || "launchd:env=DBUS_LAUNCHD_SESSION_BUS_SOCKET")
  connect
  send_hello
end

Instance Method Details

#address_from_file ⇒ Object 



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# File 'lib/dbus/bus.rb', line 737

def address_from_file
  # systemd uses /etc/machine-id
  # traditional dbus uses /var/lib/dbus/machine-id
  machine_id_path = Dir['{/etc,/var/lib/dbus}/machine-id'].first
  return nil unless machine_id_path
  machine_id = File.read(machine_id_path).chomp

  display = ENV["DISPLAY"][/:(\d+)\.?/, 1]

  bus_file_path = File.join(ENV["HOME"], "/.dbus/session-bus/#{machine_id}-#{display}")
  return nil unless File.exists?(bus_file_path)

  File.open(bus_file_path).each_line do |line|
    if line =~ /^DBUS_SESSION_BUS_ADDRESS=(.*)/
      return $1
    end
  end
end