#
# The Qubes OS Project, https://www.qubes-os.org/
#
# Copyright (C) 2010-2016 Joanna Rutkowska <[email protected]>
# Copyright (C) 2013-2016 Marek Marczykowski-Górecki
# <[email protected]>
# Copyright (C) 2014-2018 Wojtek Porczyk <[email protected]>
# Copyright (C) 2019 Frédéric Pierret <frederic.[email protected]>
#
# This library 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 library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, see <https://www.gnu.org/licenses/>.
#
import re
import qubes.config
import qubes.ext
import qubes.exc
[docs]class GUI(qubes.ext.Extension):
# pylint: disable=too-few-public-methods,unused-argument,no-self-use
@staticmethod
def attached_vms(vm):
for domain in vm.app.domains:
if getattr(domain, 'guivm', None) and domain.guivm == vm:
yield domain
@qubes.ext.handler('domain-pre-shutdown')
def on_domain_pre_shutdown(self, vm, event, **kwargs):
attached_vms = [domain for domain in self.attached_vms(vm) if
domain.is_running()]
if attached_vms and not kwargs.get('force', False):
raise qubes.exc.QubesVMError(
self, 'There are running VMs using this VM as GuiVM: '
'{}'.format(', '.join(vm.name for vm in attached_vms)))
@staticmethod
def send_gui_mode(vm):
vm.run_service('qubes.SetGuiMode',
input=('SEAMLESS'
if vm.features.get('gui-seamless', False)
else 'FULLSCREEN'))
@qubes.ext.handler('domain-init', 'domain-load')
def on_domain_init_load(self, vm, event):
if getattr(vm, 'guivm', None):
if 'guivm-' + vm.guivm.name not in vm.tags:
self.on_property_set(vm, event, name='guivm', newvalue=vm.guivm)
@qubes.ext.handler('property-reset:guivm')
def on_property_reset(self, subject, event, name, oldvalue=None):
newvalue = getattr(subject, 'guivm', None)
self.on_property_set(subject, event, name, newvalue, oldvalue)
@qubes.ext.handler('property-set:guivm')
def on_property_set(self, subject, event, name, newvalue, oldvalue=None):
# Clean other 'guivm-XXX' tags.
# gui-daemon can connect to only one domain
tags_list = list(subject.tags)
for tag in tags_list:
if tag.startswith('guivm-'):
subject.tags.remove(tag)
if newvalue:
guivm = 'guivm-' + newvalue.name
subject.tags.add(guivm)
@qubes.ext.handler('domain-qdb-create')
def on_domain_qdb_create(self, vm, event):
for feature in ('gui-videoram-overhead', 'gui-videoram-min'):
try:
vm.untrusted_qdb.write(
'/qubes-{}'.format(feature),
vm.features.check_with_template_and_adminvm(
feature))
except KeyError:
pass
# Add GuiVM Xen ID for gui-daemon
if getattr(vm, 'guivm', None):
if vm != vm.guivm and vm.guivm.is_running():
vm.untrusted_qdb.write('/qubes-gui-domain-xid',
str(vm.guivm.xid))
# Add keyboard layout from that of GuiVM
kbd_layout = vm.guivm.features.get('keyboard-layout', None)
if kbd_layout:
vm.untrusted_qdb.write('/keyboard-layout', kbd_layout)
# Set GuiVM prefix
guivm_windows_prefix = vm.features.get('guivm-windows-prefix', 'GuiVM')
if vm.features.get('service.guivm-gui-agent', None):
vm.untrusted_qdb.write('/guivm-windows-prefix',
guivm_windows_prefix)
@qubes.ext.handler('property-set:default_guivm', system=True)
def on_property_set_default_guivm(self, app, event, name, newvalue,
oldvalue=None):
for vm in app.domains:
if hasattr(vm, 'guivm') and vm.property_is_default('guivm'):
vm.fire_event('property-set:guivm',
name='guivm', newvalue=newvalue,
oldvalue=oldvalue)
@qubes.ext.handler('domain-start')
def on_domain_start(self, vm, event, **kwargs):
attached_vms = [domain for domain in self.attached_vms(vm) if
domain.is_running()]
for attached_vm in attached_vms:
attached_vm.untrusted_qdb.write('/qubes-gui-domain-xid',
str(vm.xid))
@qubes.ext.handler('domain-feature-pre-set:keyboard-layout')
def on_feature_pre_set(self, subject, event, feature, value, oldvalue=None):
untrusted_xkb_layout = value.split('+')
if len(untrusted_xkb_layout) != 3:
raise qubes.exc.QubesValueError("Invalid number of parameters")
untrusted_layout = untrusted_xkb_layout[0]
untrusted_variant = untrusted_xkb_layout[1]
untrusted_options = untrusted_xkb_layout[2]
re_variant = r'^[a-zA-Z0-9-_]*$'
re_options = r'^[a-zA-Z0-9-_:,]*$'
if not untrusted_layout.isalpha():
raise qubes.exc.QubesValueError("Invalid layout provided")
if not re.match(re_variant, untrusted_variant):
raise qubes.exc.QubesValueError("Invalid variant provided")
if not re.match(re_options, untrusted_options):
raise qubes.exc.QubesValueError("Invalid options provided")