Source code for

# -*- encoding: utf8 -*-
# The Qubes OS Project,
# Copyright (C) 2017 Marek Marczykowski-Górecki
#                               <>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public License along
# with this program; if not, see <>.

""" Utilities for common events-based actions """

import functools

import qubesadmin.exc

[docs] def interrupt_on_vm_shutdown(vms, dispatcher, subject, event): """Interrupt events processing when given VM was shutdown""" # pylint: disable=unused-argument if event == 'connection-established': for vm in sorted(vms): if vm.is_halted(): vms.remove(vm) elif event == 'domain-shutdown' and subject in vms: vms.remove(subject) if not vms: dispatcher.stop()
[docs] async def wait_for_domain_shutdown(vms): """ Helper function to wait for domain shutdown. This function wait for domain shutdown, but do not initiate the shutdown itself. :param vms: QubesVM object collection to wait for shutdown on """ if not vms: return app = list(vms)[0].app vms = set(vms) events =, enable_cache=False) events.add_handler('domain-shutdown', functools.partial(interrupt_on_vm_shutdown, vms, events)) events.add_handler('connection-established', functools.partial(interrupt_on_vm_shutdown, vms, events)) await events.listen_for_events()