dbussy_examples/list_bus_names_blocking at master · ldo/dbussy_examples · GitHub

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#!/usr/bin/python3
#+
# DBussy example -- ask the D-Bus daemon for a list of all registered names
# on a bus. Invoke this script as follows:
#
#     list_bus_names_blocking [--activatable] [--owners] [--unique] session|system
#
# where --activatable specifies you want a list of activatable (as opposed
# to active) names, --owners shows the unique bus names owning the names,
# and --unique means you want the unique names (beginning with a colon
# and assigned by the D-Bus daemon) as opposed to the requested names.
# The single argument is the bus for which to list the names.
#
# Copyright 2017 by Lawrence D'Oliveiro <ldo@geek-central.gen.nz>. This
# script is licensed CC0
# <https://creativecommons.org/publicdomain/zero/1.0/>; do with it
# what you will.
#-

import sys
import getopt
import dbussy as dbus
from dbussy import \
    DBUS

activatable = False
show_owners = False
unique = False
opts, args = getopt.getopt \
  (
    sys.argv[1:],
    "",
    ["activatable", "owners", "unique"]
  )
for keyword, value in opts :
    if keyword == "--activatable" :
        activatable = True
    elif keyword == "--owners" :
        show_owners = True
    elif keyword == "--unique" :
        unique = True
    #end if
#end for
if len(args) != 1 :
    raise getopt.GetoptError("usage: %s session|system" % sys.argv[0])
#end if

conn = dbus.Connection.bus_get \
  (
    {"session" : DBUS.BUS_SESSION, "system" : DBUS.BUS_SYSTEM}[args[0].lower()],
    private = False
  )
reply = conn.send_with_reply_and_block \
  (
    dbus.Message.new_method_call
      (
        destination = DBUS.SERVICE_DBUS,
        path = DBUS.PATH_DBUS,
        iface = DBUS.INTERFACE_DBUS,
        method = ("ListNames",  "ListActivatableNames")[activatable]
      )
  )
for name in sorted(reply.expect_objects("as")[0]) :
    if name.startswith(":") == unique :
        if show_owners :
            reply = conn.send_with_reply_and_block \
              (
                dbus.Message.new_method_call
                  (
                    destination = DBUS.SERVICE_DBUS,
                    path = DBUS.PATH_DBUS,
                    iface = DBUS.INTERFACE_DBUS,
                    method = "GetNameOwner"
                  )
                    .append_objects("s", name)
              )
            owner, = reply.all_objects
            sys.stdout.write("%s -> %s\n" % (name, owner))
        else :
            sys.stdout.write(name + "\n")
        #end if
    #end if
#end for