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#!/usr/bin/env python
"""Usage: python list-system-services.py [--session|--system]
List services on the system bus (default) or the session bus."""
import sys
import dbus
def main(argv):
factory = dbus.SystemBus
if len(argv) > 2:
sys.exit(__doc__)
elif len(argv) == 2:
if argv[1] == '--session':
factory = dbus.SessionBus
elif argv[1] != '--system':
sys.exit(__doc__)
# Get a connection to the system or session bus as appropriate
# We're only using blocking calls, so don't actually need a main loop here
bus = factory()
# This could be done by calling bus.list_names(), but here's
# more or less what that means:
# Get a reference to the desktop bus' standard object, denoted
# by the path /org/freedesktop/DBus.
dbus_object = bus.get_object('org.freedesktop.DBus',
'/org/freedesktop/DBus')
# The object /org/freedesktop/DBus
# implements the 'org.freedesktop.DBus' interface
dbus_iface = dbus.Interface(dbus_object, 'org.freedesktop.DBus')
# One of the member functions in the org.freedesktop.DBus interface
# is ListNames(), which provides a list of all the other services
# registered on this bus. Call it, and print the list.
services = dbus_iface.ListNames()
services.sort()
for service in services:
print service
if __name__ == '__main__':
main(sys.argv)
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