274 lines
9.2 KiB
Python
274 lines
9.2 KiB
Python
#
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# The Qubes OS Project, https://www.qubes-os.org/
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#
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# Copyright (C) 2016 Marek Marczykowski-Górecki
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# <marmarek@invisiblethingslab.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation; either version 2.1 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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''' Tool for importing rpm-installed template'''
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import asyncio
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import glob
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import os
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import shutil
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import subprocess
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import sys
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import grp
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import qubesadmin
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import qubesadmin.exc
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import qubesadmin.tools
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try:
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# pylint: disable=wrong-import-position
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import qubesadmin.events.utils
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have_events = True
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except ImportError:
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have_events = False
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parser = qubesadmin.tools.QubesArgumentParser(
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description='Postprocess template package')
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parser.add_argument('--really', action='store_true', default=False,
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help='Really perform the action, YOU SHOULD REALLY KNOW WHAT YOU ARE DOING')
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parser.add_argument('--skip-start', action='store_true',
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help='Do not start the VM - do not retrieve menu entries etc.')
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parser.add_argument('--keep-source', action='store_true',
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help='Do not remove source data (*dir* directory) after import')
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parser.add_argument('action', choices=['post-install', 'pre-remove'],
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help='Action to perform')
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parser.add_argument('name', action='store',
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help='Template name')
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parser.add_argument('dir', action='store',
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help='Template directory')
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def get_root_img_size(source_dir):
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'''Extract size of root.img to be imported'''
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root_path = os.path.join(source_dir, 'root.img')
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if os.path.exists(root_path + '.part.00'):
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# get just file root_size from the tar header
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p = subprocess.Popen(['tar', 'tvf', root_path + '.part.00'],
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stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)
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(stdout, _) = p.communicate()
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# -rw-r--r-- 0/0 1073741824 1970-01-01 01:00 root.img
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root_size = int(stdout.split()[2])
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elif os.path.exists(root_path):
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root_size = os.path.getsize(root_path)
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else:
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raise qubesadmin.exc.QubesException('root.img not found')
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return root_size
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def import_root_img(vm, source_dir):
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'''Import root.img into VM object'''
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root_size = get_root_img_size(source_dir)
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vm.volumes['root'].resize(root_size)
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root_path = os.path.join(source_dir, 'root.img')
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if os.path.exists(root_path + '.part.00'):
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input_files = glob.glob(root_path + '.part.*')
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cat = subprocess.Popen(['cat'] + sorted(input_files),
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stdout=subprocess.PIPE)
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tar = subprocess.Popen(['tar', 'xSOf', '-'],
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stdin=cat.stdout,
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stdout=subprocess.PIPE)
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cat.stdout.close()
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vm.volumes['root'].import_data(stream=tar.stdout)
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if tar.wait() != 0:
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raise qubesadmin.exc.QubesException('root.img extraction failed')
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if cat.wait() != 0:
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raise qubesadmin.exc.QubesException('root.img extraction failed')
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elif os.path.exists(root_path):
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if vm.app.qubesd_connection_type == 'socket':
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# check if root.img was already overwritten, i.e. if the source
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# and destination paths are the same
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vid = vm.volumes['root'].vid
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pool = vm.app.pools[vm.volumes['root'].pool]
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if pool.driver == 'file' and root_path == os.path.join(
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pool.config['dir_path'], vid + '.img'):
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vm.log.info('root.img already in place, do not re-import')
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return
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with open(root_path, 'rb') as root_file:
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vm.volumes['root'].import_data(stream=root_file)
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def import_appmenus(vm, source_dir):
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'''Import appmenus settings into VM object (later: GUI VM)'''
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if os.getuid() == 0:
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try:
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qubes_group = grp.getgrnam('qubes')
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user = qubes_group.gr_mem[0]
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cmd_prefix = ['runuser', '-u', user, '--', 'env', 'DISPLAY=:0']
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except KeyError as e:
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vm.log.warning('Default user not found, not importing appmenus: ' +
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str(e))
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return
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else:
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cmd_prefix = []
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# TODO: change this to qrexec calls to GUI VM, when GUI VM will be
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# implemented
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try:
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subprocess.check_call(cmd_prefix + ['qvm-appmenus',
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'--set-default-whitelist={}'.format(os.path.join(source_dir,
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'vm-whitelisted-appmenus.list')), vm.name])
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subprocess.check_call(cmd_prefix + ['qvm-appmenus',
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'--set-whitelist={}'.format(os.path.join(source_dir,
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'whitelisted-appmenus.list')), vm.name])
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except subprocess.CalledProcessError as e:
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vm.log.warning('Failed to set default application list: %s', e)
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@asyncio.coroutine
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def call_postinstall_service(vm):
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'''Call qubes.PostInstall service
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And adjust related settings (netvm, features).
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'''
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# just created, so no need to save previous value - we know what it was
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vm.netvm = None
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# temporarily enable qrexec feature - so vm.start() will wait for it;
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# if start fails, rollback it
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vm.features['qrexec'] = True
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try:
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vm.start()
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except qubesadmin.exc.QubesException:
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del vm.features['qrexec']
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else:
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try:
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vm.run_service_for_stdio('qubes.PostInstall')
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except subprocess.CalledProcessError:
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vm.log.error('qubes.PostInstall service failed')
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vm.shutdown()
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if have_events:
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try:
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# pylint: disable=no-member
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yield from asyncio.wait_for(
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qubesadmin.events.utils.wait_for_domain_shutdown([vm]),
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qubesadmin.config.defaults['shutdown_timeout'])
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except asyncio.TimeoutError:
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vm.kill()
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else:
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timeout = qubesadmin.config.defaults['shutdown_timeout']
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while timeout >= 0:
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if vm.is_halted():
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break
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yield from asyncio.sleep(1)
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timeout -= 1
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if not vm.is_halted():
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vm.kill()
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finally:
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vm.netvm = qubesadmin.DEFAULT
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@asyncio.coroutine
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def post_install(args):
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'''Handle post-installation tasks'''
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app = args.app
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try:
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# reinstall
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vm = app.domains[args.name]
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except KeyError:
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if app.qubesd_connection_type == 'socket' and \
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args.dir == '/var/lib/qubes/vm-templates/' + args.name:
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# vm.create_on_disk() need to create the directory on its own,
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# move it away for from its way
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tmp_sourcedir = os.path.join('/var/lib/qubes/vm-templates',
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'tmp-' + args.name)
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shutil.move(args.dir, tmp_sourcedir)
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args.dir = tmp_sourcedir
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vm = app.add_new_vm('TemplateVM',
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name=args.name,
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label=qubesadmin.config.defaults['template_label'])
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vm.log.info('Importing data')
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try:
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import_root_img(vm, args.dir)
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except:
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# if data import fails, remove half-created VM
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del app.domains[vm.name]
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raise
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import_appmenus(vm, args.dir)
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if not args.skip_start:
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yield from call_postinstall_service(vm)
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if not args.keep_source:
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shutil.rmtree(args.dir)
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return 0
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def pre_remove(args):
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'''Handle pre-removal tasks'''
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app = args.app
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try:
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tpl = app.domains[args.name]
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except KeyError:
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parser.error('Qube with this name do not exist')
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for appvm in tpl.appvms:
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parser.error('Qube {} use this template'.format(appvm.name))
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del app.domains[args.name]
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return 0
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def is_chroot():
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'''Detect if running inside chroot'''
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try:
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stat_root = os.stat('/')
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stat_init_root = os.stat('/proc/1/root/.')
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return (
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stat_root.st_dev != stat_init_root.st_dev or
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stat_root.st_ino != stat_init_root.st_ino)
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except IOError:
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print('Stat failed, assuming not chroot', file=sys.stderr)
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return False
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def main(args=None, app=None):
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'''Main function of qvm-template-postprocess'''
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args = parser.parse_args(args, app=app)
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if is_chroot():
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print('Running in chroot, ignoring request. Import template with:',
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file=sys.stderr)
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print(' '.join(sys.argv), file=sys.stderr)
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return
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if not args.really:
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parser.error('Do not call this tool directly.')
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if args.action == 'post-install':
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loop = asyncio.get_event_loop()
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try:
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loop.run_until_complete(post_install(args))
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loop.stop()
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loop.run_forever()
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finally:
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loop.close()
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elif args.action == 'pre-remove':
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pre_remove(args)
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else:
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parser.error('Unknown action')
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return 0
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if __name__ == '__main__':
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sys.exit(main())
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