/usr/share/ofono/scripts/disable-call-forwarding is in ofono-scripts 1.21-1ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53  | #!/usr/bin/python3
import sys
from gi.repository import GLib
import dbus
import dbus.mainloop.glib
def property_changed(property, value):
	if len(value.__str__()) > 0:
		print("CF property %s changed to %s" % (property, value))
	else:
		print("CF property %s changed to disabled" % (property))
	if canexit:
		mainloop.quit();
if __name__ == "__main__":
	if len(sys.argv) < 2:
		print("Usage: %s <type>" % (sys.argv[0]))
		print("Type can be: all, conditional")
		sys.exit(1)
	canexit = False
	type = sys.argv[1]
	dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
	bus = dbus.SystemBus()
	manager = dbus.Interface(bus.get_object('org.ofono', '/'),
							'org.ofono.Manager')
	modems = manager.GetModems()
	cf = dbus.Interface(bus.get_object('org.ofono', modems[0][0]),
				'org.ofono.CallForwarding')
	cf.connect_to_signal("PropertyChanged", property_changed)
	try:
		cf.DisableAll(type, timeout = 100)
	except dbus.DBusException as e:
		print("Unable to DisableAll %s" % e)
		sys.exit(1);
	print("DisableAll successful")
	canexit = True
	mainloop = GLib.MainLoop()
	mainloop.run()
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