core-admin/tests/vm_qrexec_gui.py

#!/usr/bin/python
# vim: fileencoding=utf-8

#
# The Qubes OS Project, https://www.qubes-os.org/
#
# Copyright (C) 2014-2015
#                   Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
# Copyright (C) 2015  Wojtek Porczyk <woju@invisiblethingslab.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 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
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
from distutils import spawn

import multiprocessing
import os
import subprocess
import unittest
import time

from qubes.qubes import QubesVmCollection, defaults, QubesException

import qubes.tests
import re

TEST_DATA = "0123456789" * 1024

class TC_00_AppVMMixin(qubes.tests.SystemTestsMixin):
    def setUp(self):
        super(TC_00_AppVMMixin, self).setUp()
        self.testvm1 = self.qc.add_new_vm(
            "QubesAppVm",
            name=self.make_vm_name('vm1'),
            template=self.qc.get_vm_by_name(self.template))
        self.testvm1.create_on_disk(verbose=False)
        self.testvm2 = self.qc.add_new_vm(
            "QubesAppVm",
            name=self.make_vm_name('vm2'),
            template=self.qc.get_vm_by_name(self.template))
        self.testvm2.create_on_disk(verbose=False)
        self.save_and_reload_db()
        self.qc.unlock_db()
        self.testvm1 = self.qc[self.testvm1.qid]
        self.testvm2 = self.qc[self.testvm2.qid]

    def test_000_start_shutdown(self):
        self.testvm1.start()
        self.assertEquals(self.testvm1.get_power_state(), "Running")
        self.testvm1.shutdown()

        shutdown_counter = 0
        while self.testvm1.is_running():
            if shutdown_counter > defaults["shutdown_counter_max"]:
                self.fail("VM hanged during shutdown")
            shutdown_counter += 1
            time.sleep(1)
        time.sleep(1)
        self.assertEquals(self.testvm1.get_power_state(), "Halted")

    @unittest.skipUnless(spawn.find_executable('xdotool'),
                         "xdotool not installed")
    def test_010_run_xterm(self):
        self.testvm1.start()
        self.assertEquals(self.testvm1.get_power_state(), "Running")
        self.testvm1.run("xterm")
        wait_count = 0
        title = 'user@{}'.format(self.testvm1.name)
        if self.template.count("whonix"):
            title = 'user@host'
        while subprocess.call(
                ['xdotool', 'search', '--name', title],
                stdout=open(os.path.devnull, 'w'),
                stderr=subprocess.STDOUT) > 0:
            wait_count += 1
            if wait_count > 100:
                self.fail("Timeout while waiting for xterm window")
            time.sleep(0.1)

        time.sleep(0.5)
        subprocess.check_call(
            ['xdotool', 'search', '--name', title,
             'windowactivate', 'type', 'exit\n'])

        wait_count = 0
        while subprocess.call(['xdotool', 'search', '--name', title],
                              stdout=open(os.path.devnull, 'w'),
                              stderr=subprocess.STDOUT) == 0:
            wait_count += 1
            if wait_count > 100:
                self.fail("Timeout while waiting for xterm "
                          "termination")
            time.sleep(0.1)

    @unittest.skipUnless(spawn.find_executable('xdotool'),
                         "xdotool not installed")
    def test_011_run_gnome_terminal(self):
        if "minimal" in self.template:
            self.skipTest("Minimal template doesn't have 'gnome-terminal'")
        self.testvm1.start()
        self.assertEquals(self.testvm1.get_power_state(), "Running")
        self.testvm1.run("gnome-terminal")
        title = 'user@{}'.format(self.testvm1.name)
        if self.template.count("whonix"):
            title = 'user@host'
        wait_count = 0
        while subprocess.call(
                ['xdotool', 'search', '--name', title],
                stdout=open(os.path.devnull, 'w'),
                stderr=subprocess.STDOUT) > 0:
            wait_count += 1
            if wait_count > 100:
                self.fail("Timeout while waiting for gnome-terminal window")
            time.sleep(0.1)

        time.sleep(0.5)
        subprocess.check_call(
            ['xdotool', 'search', '--name', title,
             'windowactivate', 'type', 'exit\n'])

        wait_count = 0
        while subprocess.call(['xdotool', 'search', '--name', title],
                              stdout=open(os.path.devnull, 'w'),
                              stderr=subprocess.STDOUT) == 0:
            wait_count += 1
            if wait_count > 100:
                self.fail("Timeout while waiting for gnome-terminal "
                          "termination")
            time.sleep(0.1)

    @unittest.skipUnless(spawn.find_executable('xdotool'),
                         "xdotool not installed")
    def test_012_qubes_desktop_run(self):
        self.testvm1.start()
        self.assertEquals(self.testvm1.get_power_state(), "Running")
        xterm_desktop_path = "/usr/share/applications/xterm.desktop"
        # Debian has it different...
        xterm_desktop_path_debian = \
            "/usr/share/applications/debian-xterm.desktop"
        if self.testvm1.run("test -r {}".format(xterm_desktop_path_debian),
                            wait=True) == 0:
            xterm_desktop_path = xterm_desktop_path_debian
        self.testvm1.run("qubes-desktop-run {}".format(xterm_desktop_path))
        title = 'user@{}'.format(self.testvm1.name)
        if self.template.count("whonix"):
            title = 'user@host'
        wait_count = 0
        while subprocess.call(
                ['xdotool', 'search', '--name', title],
                stdout=open(os.path.devnull, 'w'),
                stderr=subprocess.STDOUT) > 0:
            wait_count += 1
            if wait_count > 100:
                self.fail("Timeout while waiting for xterm window")
            time.sleep(0.1)

        time.sleep(0.5)
        subprocess.check_call(
            ['xdotool', 'search', '--name', title,
             'windowactivate', 'type', 'exit\n'])

        wait_count = 0
        while subprocess.call(['xdotool', 'search', '--name', title],
                              stdout=open(os.path.devnull, 'w'),
                              stderr=subprocess.STDOUT) == 0:
            wait_count += 1
            if wait_count > 100:
                self.fail("Timeout while waiting for xterm "
                          "termination")
            time.sleep(0.1)

    def test_050_qrexec_simple_eof(self):
        """Test for data and EOF transmission dom0->VM"""
        result = multiprocessing.Value('i', 0)

        def run(self, result):
            p = self.testvm1.run("cat", passio_popen=True,
                                 passio_stderr=True)

            (stdout, stderr) = p.communicate(TEST_DATA)
            if stdout != TEST_DATA:
                result.value = 1
            if len(stderr) > 0:
                result.value = 2

        self.testvm1.start()

        t = multiprocessing.Process(target=run, args=(self, result))
        t.start()
        t.join(timeout=10)
        if t.is_alive():
            t.terminate()
            self.fail("Timeout, probably EOF wasn't transferred to the VM "
                      "process")
        if result.value == 1:
            self.fail("Received data differs from what was sent")
        elif result.value == 2:
            self.fail("Some data was printed to stderr")

    def test_051_qrexec_simple_eof_reverse(self):
        """Test for EOF transmission VM->dom0"""
        result = multiprocessing.Value('i', 0)

        def run(self, result):
            p = self.testvm1.run("echo test; exec >&-; cat > /dev/null",
                                 passio_popen=True, passio_stderr=True)
            # this will hang on test failure
            stdout = p.stdout.read()
            p.stdin.write(TEST_DATA)
            p.stdin.close()
            if stdout.strip() != "test":
                result.value = 1
            # this may hang in some buggy cases
            elif len(p.stderr.read()) > 0:
                result.value = 2
            elif p.poll() is None:
                time.sleep(1)
                if p.poll() is None:
                    result.value = 3

        self.testvm1.start()

        t = multiprocessing.Process(target=run, args=(self, result))
        t.start()
        t.join(timeout=10)
        if t.is_alive():
            t.terminate()
            self.fail("Timeout, probably EOF wasn't transferred from the VM "
                      "process")
        if result.value == 1:
            self.fail("Received data differs from what was expected")
        elif result.value == 2:
            self.fail("Some data was printed to stderr")
        elif result.value == 3:
            self.fail("VM proceess didn't terminated on EOF")

    def test_052_qrexec_vm_service_eof(self):
        """Test for EOF transmission VM(src)->VM(dst)"""
        result = multiprocessing.Value('i', 0)

        def run(self, result):
            p = self.testvm1.run("/usr/lib/qubes/qrexec-client-vm %s test.EOF "
                                 "/bin/sh -c 'echo test; exec >&-; cat "
                                 ">&$SAVED_FD_1'" % self.testvm2.name,
                                 passio_popen=True)
            (stdout, stderr) = p.communicate()
            if stdout != "test\n":
                result.value = 1

        self.testvm1.start()
        self.testvm2.start()
        p = self.testvm2.run("cat > /etc/qubes-rpc/test.EOF", user="root",
                             passio_popen=True)
        p.stdin.write("/bin/cat")
        p.stdin.close()
        p.wait()
        policy = open("/etc/qubes-rpc/policy/test.EOF", "w")
        policy.write("%s %s allow" % (self.testvm1.name, self.testvm2.name))
        policy.close()
        self.addCleanup(os.unlink, "/etc/qubes-rpc/policy/test.EOF")

        t = multiprocessing.Process(target=run, args=(self, result))
        t.start()
        t.join(timeout=10)
        if t.is_alive():
            t.terminate()
            self.fail("Timeout, probably EOF wasn't transferred")
        if result.value == 1:
            self.fail("Received data differs from what was expected")

    @unittest.expectedFailure
    def test_053_qrexec_vm_service_eof_reverse(self):
        """Test for EOF transmission VM(src)<-VM(dst)"""
        result = multiprocessing.Value('i', 0)

        def run(self, result):
            p = self.testvm1.run("/usr/lib/qubes/qrexec-client-vm %s test.EOF "
                                 "/bin/sh -c 'cat >&$SAVED_FD_1'"
                                 % self.testvm2.name,
                                 passio_popen=True)
            (stdout, stderr) = p.communicate()
            if stdout != "test\n":
                result.value = 1

        self.testvm1.start()
        self.testvm2.start()
        p = self.testvm2.run("cat > /etc/qubes-rpc/test.EOF", user="root",
                             passio_popen=True)
        p.stdin.write("echo test; exec >&-; cat >/dev/null")
        p.stdin.close()
        p.wait()
        policy = open("/etc/qubes-rpc/policy/test.EOF", "w")
        policy.write("%s %s allow" % (self.testvm1.name, self.testvm2.name))
        policy.close()
        self.addCleanup(os.unlink, "/etc/qubes-rpc/policy/test.EOF")

        t = multiprocessing.Process(target=run, args=(self, result))
        t.start()
        t.join(timeout=10)
        if t.is_alive():
            t.terminate()
            self.fail("Timeout, probably EOF wasn't transferred")
        if result.value == 1:
            self.fail("Received data differs from what was expected")

    def test_055_qrexec_dom0_service_abort(self):
        """
        Test if service abort (by dom0) is properly handled by source VM.

        If "remote" part of the service terminates, the source part should
        properly be notified. This includes closing its stdin (which is
        already checked by test_053_qrexec_vm_service_eof_reverse), but also
        its stdout - otherwise such service might hang on write(2) call.
        """

        def run (src):
            p = src.run("/usr/lib/qubes/qrexec-client-vm dom0 "
                                 "test.Abort /bin/cat /dev/zero",
                                 passio_popen=True)

            p.communicate()
            p.wait()

        self.testvm1.start()
        service = open("/etc/qubes-rpc/test.Abort", "w")
        service.write("sleep 1")
        service.close()
        self.addCleanup(os.unlink, "/etc/qubes-rpc/test.Abort")
        policy = open("/etc/qubes-rpc/policy/test.Abort", "w")
        policy.write("%s dom0 allow" % (self.testvm1.name))
        policy.close()
        self.addCleanup(os.unlink, "/etc/qubes-rpc/policy/test.Abort")

        t = multiprocessing.Process(target=run, args=(self.testvm1,))
        t.start()
        t.join(timeout=10)
        if t.is_alive():
            t.terminate()
            self.fail("Timeout, probably stdout wasn't closed")


    def test_060_qrexec_exit_code_dom0(self):
        self.testvm1.start()

        p = self.testvm1.run("exit 0", passio_popen=True)
        p.wait()
        self.assertEqual(0, p.returncode)

        p = self.testvm1.run("exit 3", passio_popen=True)
        p.wait()
        self.assertEqual(3, p.returncode)

    @unittest.expectedFailure
    def test_065_qrexec_exit_code_vm(self):
        self.testvm1.start()
        self.testvm2.start()

        policy = open("/etc/qubes-rpc/policy/test.Retcode", "w")
        policy.write("%s %s allow" % (self.testvm1.name, self.testvm2.name))
        policy.close()
        self.addCleanup(os.unlink, "/etc/qubes-rpc/policy/test.Retcode")

        p = self.testvm2.run("cat > /etc/qubes-rpc/test.Retcode", user="root",
                             passio_popen=True)
        p.stdin.write("exit 0")
        p.stdin.close()
        p.wait()

        p = self.testvm1.run("/usr/lib/qubes/qrexec-client-vm %s test.Retcode "
                             "/bin/sh -c 'cat >/dev/null'; echo $?"
                             % self.testvm1.name,
                             passio_popen=True)
        (stdout, stderr) = p.communicate()
        self.assertEqual(stdout, "0\n")

        p = self.testvm2.run("cat > /etc/qubes-rpc/test.Retcode", user="root",
                             passio_popen=True)
        p.stdin.write("exit 3")
        p.stdin.close()
        p.wait()

        p = self.testvm1.run("/usr/lib/qubes/qrexec-client-vm %s test.Retcode "
                             "/bin/sh -c 'cat >/dev/null'; echo $?"
                             % self.testvm1.name,
                             passio_popen=True)
        (stdout, stderr) = p.communicate()
        self.assertEqual(stdout, "3\n")

    def test_070_qrexec_vm_simultaneous_write(self):
        """Test for simultaneous write in VM(src)->VM(dst) connection

            This is regression test for #1347

            Check for deadlock when initially both sides writes a lot of data
            (and not read anything). When one side starts reading, it should
            get the data and the remote side should be possible to write then more.
            There was a bug where remote side was waiting on write(2) and not
            handling anything else.
        """
        result = multiprocessing.Value('i', -1)

        def run(self):
            p = self.testvm1.run(
                "/usr/lib/qubes/qrexec-client-vm %s test.write "
                "/bin/sh -c '"
                # first write a lot of data to fill all the buffers
                "dd if=/dev/zero bs=993 count=10000 iflag=fullblock & "
                # then after some time start reading
                "sleep 1; "
                "dd of=/dev/null bs=993 count=10000 iflag=fullblock; "
                "wait"
                "'" % self.testvm2.name, passio_popen=True)
            p.communicate()
            result.value = p.returncode

        self.testvm1.start()
        self.testvm2.start()
        p = self.testvm2.run("cat > /etc/qubes-rpc/test.write", user="root",
                             passio_popen=True)
        # first write a lot of data
        p.stdin.write("dd if=/dev/zero bs=993 count=10000 iflag=fullblock\n")
        # and only then read something
        p.stdin.write("dd of=/dev/null bs=993 count=10000 iflag=fullblock\n")
        p.stdin.close()
        p.wait()
        policy = open("/etc/qubes-rpc/policy/test.write", "w")
        policy.write("%s %s allow" % (self.testvm1.name, self.testvm2.name))
        policy.close()
        self.addCleanup(os.unlink, "/etc/qubes-rpc/policy/test.write")

        t = multiprocessing.Process(target=run, args=(self,))
        t.start()
        t.join(timeout=10)
        if t.is_alive():
            t.terminate()
            self.fail("Timeout, probably deadlock")
        self.assertEqual(result.value, 0, "Service call failed")

    def test_071_qrexec_dom0_simultaneous_write(self):
        """Test for simultaneous write in dom0(src)->VM(dst) connection

            Similar to test_070_qrexec_vm_simultaneous_write, but with dom0
            as a source.
        """
        result = multiprocessing.Value('i', -1)

        def run(self):
            result.value = self.testvm2.run_service(
                "test.write", localcmd="/bin/sh -c '"
                # first write a lot of data to fill all the buffers
                "dd if=/dev/zero bs=993 count=10000 iflag=fullblock & "
                # then after some time start reading
                "sleep 1; "
                "dd of=/dev/null bs=993 count=10000 iflag=fullblock; "
                "wait"
                "'")

        self.testvm2.start()
        p = self.testvm2.run("cat > /etc/qubes-rpc/test.write", user="root",
                             passio_popen=True)
        # first write a lot of data
        p.stdin.write("dd if=/dev/zero bs=993 count=10000 iflag=fullblock\n")
        # and only then read something
        p.stdin.write("dd of=/dev/null bs=993 count=10000 iflag=fullblock\n")
        p.stdin.close()
        p.wait()
        policy = open("/etc/qubes-rpc/policy/test.write", "w")
        policy.write("%s %s allow" % (self.testvm1.name, self.testvm2.name))
        policy.close()
        self.addCleanup(os.unlink, "/etc/qubes-rpc/policy/test.write")

        t = multiprocessing.Process(target=run, args=(self,))
        t.start()
        t.join(timeout=10)
        if t.is_alive():
            t.terminate()
            self.fail("Timeout, probably deadlock")
        self.assertEqual(result.value, 0, "Service call failed")

    def test_072_qrexec_to_dom0_simultaneous_write(self):
        """Test for simultaneous write in dom0(src)<-VM(dst) connection

            Similar to test_071_qrexec_dom0_simultaneous_write, but with dom0
            as a "hanging" side.
        """
        result = multiprocessing.Value('i', -1)

        def run(self):
            result.value = self.testvm2.run_service(
                "test.write", localcmd="/bin/sh -c '"
                # first write a lot of data to fill all the buffers
                "dd if=/dev/zero bs=993 count=10000 iflag=fullblock "
                # then, only when all written, read something
                "dd of=/dev/null bs=993 count=10000 iflag=fullblock; "
                "'")

        self.testvm2.start()
        p = self.testvm2.run("cat > /etc/qubes-rpc/test.write", user="root",
                             passio_popen=True)
        # first write a lot of data
        p.stdin.write("dd if=/dev/zero bs=993 count=10000 iflag=fullblock &\n")
        # and only then read something
        p.stdin.write("dd of=/dev/null bs=993 count=10000 iflag=fullblock\n")
        p.stdin.write("sleep 1; \n")
        p.stdin.write("wait\n")
        p.stdin.close()
        p.wait()
        policy = open("/etc/qubes-rpc/policy/test.write", "w")
        policy.write("%s %s allow" % (self.testvm1.name, self.testvm2.name))
        policy.close()
        self.addCleanup(os.unlink, "/etc/qubes-rpc/policy/test.write")

        t = multiprocessing.Process(target=run, args=(self,))
        t.start()
        t.join(timeout=10)
        if t.is_alive():
            t.terminate()
            self.fail("Timeout, probably deadlock")
        self.assertEqual(result.value, 0, "Service call failed")

    @unittest.skipUnless(spawn.find_executable('xdotool'),
                         "xdotool not installed")
    def test_100_qrexec_filecopy(self):
        self.testvm1.start()
        self.testvm2.start()
        p = self.testvm1.run("qvm-copy-to-vm %s /etc/passwd" %
                             self.testvm2.name, passio_popen=True,
                             passio_stderr=True)
        # Confirm transfer
        self.enter_keys_in_window('Question', ['y'])
        p.wait()
        self.assertEqual(p.returncode, 0, "qvm-copy-to-vm failed: %s" %
                         p.stderr.read())
        retcode = self.testvm2.run("diff /etc/passwd "
                                   "/home/user/QubesIncoming/{}/passwd".format(
                                       self.testvm1.name),
                                   wait=True)
        self.assertEqual(retcode, 0, "file differs")

    @unittest.skipUnless(spawn.find_executable('xdotool'),
                         "xdotool not installed")
    def test_101_qrexec_filecopy_with_autostart(self):
        self.testvm1.start()
        p = self.testvm1.run("qvm-copy-to-vm %s /etc/passwd" %
                             self.testvm2.name, passio_popen=True,
                             passio_stderr=True)
        # Confirm transfer
        self.enter_keys_in_window('Question', ['y'])
        p.wait()
        self.assertEqual(p.returncode, 0, "qvm-copy-to-vm failed: %s" %
                         p.stderr.read())
        # workaround for libvirt bug (domain ID isn't updated when is started
        #  from other application) - details in
        # QubesOS/qubes-core-libvirt@63ede4dfb4485c4161dd6a2cc809e8fb45ca664f
        self.testvm2._libvirt_domain = None
        self.assertTrue(self.testvm2.is_running())
        retcode = self.testvm2.run("diff /etc/passwd "
                                   "/home/user/QubesIncoming/{}/passwd".format(
                                       self.testvm1.name),
                                   wait=True)
        self.assertEqual(retcode, 0, "file differs")

    @unittest.skipUnless(spawn.find_executable('xdotool'),
                         "xdotool not installed")
    def test_110_qrexec_filecopy_deny(self):
        self.testvm1.start()
        self.testvm2.start()
        p = self.testvm1.run("qvm-copy-to-vm %s /etc/passwd" %
                             self.testvm2.name, passio_popen=True)
        # Deny transfer
        self.enter_keys_in_window('Question', ['n'])
        p.wait()
        self.assertNotEqual(p.returncode, 0, "qvm-copy-to-vm unexpectedly "
                            "succeeded")
        retcode = self.testvm1.run("ls /home/user/QubesIncoming/%s" %
                                   self.testvm1.name, wait=True,
                                   ignore_stderr=True)
        self.assertNotEqual(retcode, 0, "QubesIncoming exists although file "
                            "copy was denied")

    @unittest.skip("Xen gntalloc driver crashes when page is mapped in the "
                   "same domain")
    @unittest.skipUnless(spawn.find_executable('xdotool'),
                         "xdotool not installed")
    def test_120_qrexec_filecopy_self(self):
        self.testvm1.start()
        p = self.testvm1.run("qvm-copy-to-vm %s /etc/passwd" %
                             self.testvm1.name, passio_popen=True,
                             passio_stderr=True)
        # Confirm transfer
        self.enter_keys_in_window('Question', ['y'])
        p.wait()
        self.assertEqual(p.returncode, 0, "qvm-copy-to-vm failed: %s" %
                         p.stderr.read())
        retcode = self.testvm1.run(
            "diff /etc/passwd /home/user/QubesIncoming/{}/passwd".format(
                self.testvm1.name),
            wait=True)
        self.assertEqual(retcode, 0, "file differs")

    @unittest.skipUnless(spawn.find_executable('xdotool'),
                         "xdotool not installed")
    def test_130_qrexec_filemove_disk_full(self):
        self.testvm1.start()
        self.testvm2.start()
        # Prepare test file
        prepare_cmd = ("yes teststring | dd of=testfile bs=1M "
                       "count=50 iflag=fullblock")
        retcode = self.testvm1.run(prepare_cmd, wait=True)
        if retcode != 0:
            raise RuntimeError("Failed '{}' in {}".format(prepare_cmd,
                                                          self.testvm1.name))
        # Prepare target directory with limited size
        prepare_cmd = (
            "mkdir -p /home/user/QubesIncoming && "
            "chown user /home/user/QubesIncoming && "
            "mount -t tmpfs none /home/user/QubesIncoming -o size=48M"
        )
        retcode = self.testvm2.run(prepare_cmd, user="root", wait=True)
        if retcode != 0:
            raise RuntimeError("Failed '{}' in {}".format(prepare_cmd,
                                                          self.testvm2.name))
        p = self.testvm1.run("qvm-move-to-vm %s testfile" %
                             self.testvm2.name, passio_popen=True,
                             passio_stderr=True)
        # Confirm transfer
        self.enter_keys_in_window('Question', ['y'])
        # Close GUI error message
        self.enter_keys_in_window('Error', ['Return'])
        p.wait()
        self.assertNotEqual(p.returncode, 0, "qvm-move-to-vm should fail")
        retcode = self.testvm1.run("test -f testfile", wait=True)
        self.assertEqual(retcode, 0, "testfile should not be deleted in "
                                     "source VM")

    def test_200_timezone(self):
        """Test whether timezone setting is properly propagated to the VM"""
        if "whonix" in self.template:
            self.skipTest("Timezone propagation disabled on Whonix templates")

        self.testvm1.start()
        (vm_tz, _) = self.testvm1.run("date +%Z",
                                      passio_popen=True).communicate()
        (dom0_tz, _) = subprocess.Popen(["date", "+%Z"],
                                        stdout=subprocess.PIPE).communicate()
        self.assertEqual(vm_tz.strip(), dom0_tz.strip())

        # Check if reverting back to UTC works
        (vm_tz, _) = self.testvm1.run("TZ=UTC date +%Z",
                                      passio_popen=True).communicate()
        self.assertEqual(vm_tz.strip(), "UTC")

    def test_210_time_sync(self):
        """Test time synchronization mechanism"""
        self.testvm1.start()
        self.testvm2.start()
        (start_time, _) = subprocess.Popen(["date", "-u", "+%s"],
                                           stdout=subprocess.PIPE).communicate()
        original_clockvm = self.qc.get_clockvm_vm()
        if original_clockvm:
            original_clockvm_name = original_clockvm.name
        else:
            original_clockvm_name = "none"
        try:
            # use qubes-prefs to not hassle with qubes.xml locking
            subprocess.check_call(["qubes-prefs", "-s", "clockvm",
                                   self.testvm1.name])
            # break vm and dom0 time, to check if qvm-sync-clock would fix it
            subprocess.check_call(["sudo", "date", "-s",
                                   "2001-01-01T12:34:56"],
                                  stdout=open(os.devnull, 'w'))
            retcode = self.testvm1.run("date -s 2001-01-01T12:34:56",
                                       user="root", wait=True)
            self.assertEquals(retcode, 0, "Failed to break the VM(1) time")
            retcode = self.testvm2.run("date -s 2001-01-01T12:34:56",
                                       user="root", wait=True)
            self.assertEquals(retcode, 0, "Failed to break the VM(2) time")
            retcode = subprocess.call(["qvm-sync-clock"])
            self.assertEquals(retcode, 0,
                              "qvm-sync-clock failed with code {}".
                              format(retcode))
            (vm_time, _) = self.testvm1.run("date -u +%s",
                                            passio_popen=True).communicate()
            self.assertAlmostEquals(int(vm_time), int(start_time), delta=30)
            (vm_time, _) = self.testvm2.run("date -u +%s",
                                            passio_popen=True).communicate()
            self.assertAlmostEquals(int(vm_time), int(start_time), delta=30)
            (dom0_time, _) = subprocess.Popen(["date", "-u", "+%s"],
                                              stdout=subprocess.PIPE
                                              ).communicate()
            self.assertAlmostEquals(int(dom0_time), int(start_time), delta=30)

        except:
            # reset time to some approximation of the real time
            subprocess.Popen(["sudo", "date", "-u", "-s", "@" + start_time])
            raise
        finally:
            subprocess.call(["qubes-prefs", "-s", "clockvm",
                             original_clockvm_name])

    def test_250_resize_private_img(self):
        """
        Test private.img resize, both offline and online
        :return:
        """
        # First offline test
        self.testvm1.resize_private_img(4*1024**3)
        self.testvm1.start()
        df_cmd = '( df --output=size /rw || df /rw | awk \'{print $2}\' )|' \
                 'tail -n 1'
        p = self.testvm1.run(df_cmd,
                             passio_popen=True)
        # new_size in 1k-blocks
        (new_size, _) = p.communicate()
        # some safety margin for FS metadata
        self.assertGreater(int(new_size.strip()), 3.8*1024**2)
        # Then online test
        self.testvm1.resize_private_img(6*1024**3)
        p = self.testvm1.run(df_cmd,
                             passio_popen=True)
        # new_size in 1k-blocks
        (new_size, _) = p.communicate()
        # some safety margin for FS metadata
        self.assertGreater(int(new_size.strip()), 5.8*1024**2)

class TC_05_StandaloneVM(qubes.tests.SystemTestsMixin, qubes.tests.QubesTestCase):
    def test_000_create_start(self):
        testvm1 = self.qc.add_new_vm("QubesAppVm",
                                     template=None,
                                     name=self.make_vm_name('vm1'))
        testvm1.create_on_disk(verbose=False,
                               source_template=self.qc.get_default_template())
        self.qc.save()
        self.qc.unlock_db()
        testvm1.start()
        self.assertEquals(testvm1.get_power_state(), "Running")

    def test_100_resize_root_img(self):
        testvm1 = self.qc.add_new_vm("QubesAppVm",
                                     template=None,
                                     name=self.make_vm_name('vm1'))
        testvm1.create_on_disk(verbose=False,
                               source_template=self.qc.get_default_template())
        self.qc.save()
        self.qc.unlock_db()
        with self.assertRaises(QubesException):
            testvm1.resize_root_img(20*1024**3)
        testvm1.resize_root_img(20*1024**3, allow_start=True)
        timeout = 60
        while testvm1.is_running():
            time.sleep(1)
            timeout -= 1
            if timeout == 0:
                self.fail("Timeout while waiting for VM shutdown")
        self.assertEquals(testvm1.get_root_img_sz(), 20*1024**3)
        testvm1.start()
        p = testvm1.run('df --output=size /|tail -n 1',
                        passio_popen=True)
        # new_size in 1k-blocks
        (new_size, _) = p.communicate()
        # some safety margin for FS metadata
        self.assertGreater(int(new_size.strip()), 19*1024**2)


class TC_10_HVM(qubes.tests.SystemTestsMixin, qubes.tests.QubesTestCase):
    # TODO: test with some OS inside
    # TODO: windows tools tests

    def test_000_create_start(self):
        testvm1 = self.qc.add_new_vm("QubesHVm",
                                     name=self.make_vm_name('vm1'))
        testvm1.create_on_disk(verbose=False)
        self.qc.save()
        self.qc.unlock_db()
        testvm1.start()
        self.assertEquals(testvm1.get_power_state(), "Running")

    def test_010_create_start_template(self):
        templatevm = self.qc.add_new_vm("QubesTemplateHVm",
                                        name=self.make_vm_name('template'))
        templatevm.create_on_disk(verbose=False)
        self.qc.save()
        self.qc.unlock_db()

        templatevm.start()
        self.assertEquals(templatevm.get_power_state(), "Running")

    def test_020_create_start_template_vm(self):
        templatevm = self.qc.add_new_vm("QubesTemplateHVm",
                                        name=self.make_vm_name('template'))
        templatevm.create_on_disk(verbose=False)
        testvm2 = self.qc.add_new_vm("QubesHVm",
                                     name=self.make_vm_name('vm2'),
                                     template=templatevm)
        testvm2.create_on_disk(verbose=False)
        self.qc.save()
        self.qc.unlock_db()

        testvm2.start()
        self.assertEquals(testvm2.get_power_state(), "Running")

    def test_030_prevent_simultaneus_start(self):
        templatevm = self.qc.add_new_vm("QubesTemplateHVm",
                                        name=self.make_vm_name('template'))
        templatevm.create_on_disk(verbose=False)
        testvm2 = self.qc.add_new_vm("QubesHVm",
                                     name=self.make_vm_name('vm2'),
                                     template=templatevm)
        testvm2.create_on_disk(verbose=False)
        self.qc.save()
        self.qc.unlock_db()

        templatevm.start()
        self.assertEquals(templatevm.get_power_state(), "Running")
        self.assertRaises(QubesException, testvm2.start)
        templatevm.force_shutdown()
        testvm2.start()
        self.assertEquals(testvm2.get_power_state(), "Running")
        self.assertRaises(QubesException, templatevm.start)

    def test_100_resize_root_img(self):
        testvm1 = self.qc.add_new_vm("QubesHVm",
                                     name=self.make_vm_name('vm1'))
        testvm1.create_on_disk(verbose=False)
        self.qc.save()
        self.qc.unlock_db()
        testvm1.resize_root_img(30*1024**3)
        self.assertEquals(testvm1.get_root_img_sz(), 30*1024**3)
        testvm1.start()
        self.assertEquals(testvm1.get_power_state(), "Running")
        # TODO: launch some OS there and check the size

class TC_20_DispVMMixin(qubes.tests.SystemTestsMixin):
    def test_000_prepare_dvm(self):
        self.qc.unlock_db()
        retcode = subprocess.call(['/usr/bin/qvm-create-default-dvm',
                                   self.template],
                                  stderr=open(os.devnull, 'w'))
        self.assertEqual(retcode, 0)
        self.qc.lock_db_for_writing()
        self.qc.load()
        self.assertIsNotNone(self.qc.get_vm_by_name(
            self.template + "-dvm"))
        # TODO: check mtime of snapshot file

    def test_010_simple_dvm_run(self):
        self.qc.unlock_db()
        p = subprocess.Popen(['/usr/lib/qubes/qfile-daemon-dvm',
                              'qubes.VMShell', 'dom0', 'DEFAULT'],
                             stdin=subprocess.PIPE,
                             stdout=subprocess.PIPE,
                             stderr=open(os.devnull, 'w'))
        (stdout, _) = p.communicate(input="echo test")
        self.assertEqual(stdout, "test\n")
        # TODO: check if DispVM is destroyed

    @unittest.skipUnless(spawn.find_executable('xdotool'),
                         "xdotool not installed")
    def test_020_gui_app(self):
        self.qc.unlock_db()
        p = subprocess.Popen(['/usr/lib/qubes/qfile-daemon-dvm',
                              'qubes.VMShell', 'dom0', 'DEFAULT'],
                             stdin=subprocess.PIPE,
                             stdout=subprocess.PIPE,
                             stderr=open(os.devnull, 'w'))

        # wait for DispVM startup:
        p.stdin.write("echo test\n")
        p.stdin.flush()
        l = p.stdout.readline()
        self.assertEqual(l, "test\n")

        # potential race condition, but our tests are supposed to be
        # running on dedicated machine, so should not be a problem
        self.qc.lock_db_for_reading()
        self.qc.load()
        self.qc.unlock_db()

        max_qid = 0
        for vm in self.qc.values():
            if not vm.is_disposablevm():
                continue
            if vm.qid > max_qid:
                max_qid = vm.qid
        dispvm = self.qc[max_qid]
        self.assertNotEqual(dispvm.qid, 0, "DispVM not found in qubes.xml")
        self.assertTrue(dispvm.is_running())
        try:
            window_title = 'user@%s' % (dispvm.template.name + "-dvm")
            p.stdin.write("xterm -e "
                          "\"sh -s -c 'echo \\\"\033]0;{}\007\\\";read x;'\"\n".
                          format(window_title))
            self.wait_for_window(window_title)

            time.sleep(0.5)
            self.enter_keys_in_window(window_title, ['Return'])
            # Wait for window to close
            self.wait_for_window(window_title, show=False)
        finally:
            p.stdin.close()

        wait_count = 0
        while dispvm.is_running():
            wait_count += 1
            if wait_count > 100:
                self.fail("Timeout while waiting for DispVM destruction")
            time.sleep(0.1)
        wait_count = 0
        while p.poll() is None:
            wait_count += 1
            if wait_count > 100:
                self.fail("Timeout while waiting for qfile-daemon-dvm "
                          "termination")
            time.sleep(0.1)
        self.assertEqual(p.returncode, 0)

        self.qc.lock_db_for_reading()
        self.qc.load()
        self.qc.unlock_db()
        self.assertIsNone(self.qc.get_vm_by_name(dispvm.name),
                          "DispVM not removed from qubes.xml")

    def _handle_editor(self, winid):
        (window_title, _) = subprocess.Popen(
            ['xdotool', 'getwindowname', winid], stdout=subprocess.PIPE).\
            communicate()
        window_title = window_title.strip().\
            replace('(', '\(').replace(')', '\)')
        time.sleep(1)
        if "gedit" in window_title:
            subprocess.check_call(['xdotool', 'search', '--name', window_title,
                                   'windowactivate', 'type', 'test test 2\n'])
            time.sleep(0.5)
            subprocess.check_call(['xdotool', 'search', '--name', window_title,
                                   'key', 'ctrl+s', 'ctrl+q'])
        elif "emacs" in window_title:
            subprocess.check_call(['xdotool', 'search', '--name', window_title,
                                   'windowactivate', 'type', 'test test 2\n'])
            time.sleep(0.5)
            subprocess.check_call(['xdotool', 'search', '--name', window_title,
                                   'key', 'ctrl+x', 'ctrl+s'])
            subprocess.check_call(['xdotool', 'search', '--name', window_title,
                                   'key', 'ctrl+x', 'ctrl+c'])
        elif "vim" in window_title:
            subprocess.check_call(['xdotool', 'search', '--name', window_title,
                                   'windowactivate', 'key', 'i',
                                   'type', 'test test 2\n'])
            subprocess.check_call(
                ['xdotool', 'search', '--name', window_title,
                 'key', 'Escape', 'colon', 'w', 'q', 'Return'])
        else:
            self.fail("Unknown editor window: {}".format(window_title))

    @unittest.skipUnless(spawn.find_executable('xdotool'),
                         "xdotool not installed")
    def test_030_edit_file(self):
        testvm1 = self.qc.add_new_vm("QubesAppVm",
                                     name=self.make_vm_name('vm1'),
                                     template=self.qc.get_vm_by_name(
                                         self.template))
        testvm1.create_on_disk(verbose=False)
        self.qc.save()

        testvm1.start()
        testvm1.run("echo test1 > /home/user/test.txt", wait=True)

        self.qc.unlock_db()
        p = testvm1.run("qvm-open-in-dvm /home/user/test.txt",
                        passio_popen=True)

        wait_count = 0
        winid = None
        while True:
            search = subprocess.Popen(['xdotool', 'search',
                                       '--onlyvisible', '--class', 'disp*'],
                                      stdout=subprocess.PIPE,
                                      stderr=open(os.path.devnull, 'w'))
            retcode = search.wait()
            if retcode == 0:
                winid = search.stdout.read().strip()
                break
            wait_count += 1
            if wait_count > 100:
                self.fail("Timeout while waiting for editor window")
            time.sleep(0.3)

        self._handle_editor(winid)
        p.wait()
        p = testvm1.run("cat /home/user/test.txt",
                        passio_popen=True)
        (test_txt_content, _) = p.communicate()
        self.assertEqual(test_txt_content, "test test 2\ntest1\n")


class TC_30_Gui_daemon(qubes.tests.SystemTestsMixin, qubes.tests.QubesTestCase):
    @unittest.skipUnless(spawn.find_executable('xdotool'),
                         "xdotool not installed")
    def test_000_clipboard(self):
        testvm1 = self.qc.add_new_vm("QubesAppVm",
                                     name=self.make_vm_name('vm1'),
                                     template=self.qc.get_default_template())
        testvm1.create_on_disk(verbose=False)
        testvm2 = self.qc.add_new_vm("QubesAppVm",
                                     name=self.make_vm_name('vm2'),
                                     template=self.qc.get_default_template())
        testvm2.create_on_disk(verbose=False)
        self.qc.save()
        self.qc.unlock_db()

        testvm1.start()
        testvm2.start()

        window_title = 'user@{}'.format(testvm1.name)
        testvm1.run('zenity --text-info --editable --title={}'.format(
            window_title))

        self.wait_for_window(window_title)
        time.sleep(0.5)
        test_string = "test{}".format(testvm1.xid)

        # Type and copy some text
        subprocess.check_call(['xdotool', 'search', '--name', window_title,
                               'windowactivate',
                               'type', '{}'.format(test_string)])
        # second xdotool call because type --terminator do not work (SEGV)
        # additionally do not use search here, so window stack will be empty
        # and xdotool will use XTEST instead of generating events manually -
        # this will be much better - at least because events will have
        # correct timestamp (so gui-daemon would not drop the copy request)
        subprocess.check_call(['xdotool',
                               'key', 'ctrl+a', 'ctrl+c', 'ctrl+shift+c',
                               'Escape'])

        clipboard_content = \
            open('/var/run/qubes/qubes-clipboard.bin', 'r').read().strip()
        self.assertEquals(clipboard_content, test_string,
                          "Clipboard copy operation failed - content")
        clipboard_source = \
            open('/var/run/qubes/qubes-clipboard.bin.source',
                 'r').read().strip()
        self.assertEquals(clipboard_source, testvm1.name,
                          "Clipboard copy operation failed - owner")

        # Then paste it to the other window
        window_title = 'user@{}'.format(testvm2.name)
        p = testvm2.run('zenity --entry --title={} > test.txt'.format(
                        window_title), passio_popen=True)
        self.wait_for_window(window_title)

        subprocess.check_call(['xdotool', 'key', '--delay', '100',
                               'ctrl+shift+v', 'ctrl+v', 'Return'])
        p.wait()

        # And compare the result
        (test_output, _) = testvm2.run('cat test.txt',
                                       passio_popen=True).communicate()
        self.assertEquals(test_string, test_output.strip())

        clipboard_content = \
            open('/var/run/qubes/qubes-clipboard.bin', 'r').read().strip()
        self.assertEquals(clipboard_content, "",
                          "Clipboard not wiped after paste - content")
        clipboard_source = \
            open('/var/run/qubes/qubes-clipboard.bin.source', 'r').read(

            ).strip()
        self.assertEquals(clipboard_source, "",
                          "Clipboard not wiped after paste - owner")


@unittest.skipUnless(os.path.exists('/var/lib/qubes/vm-kernels/pvgrub2'),
                     'grub-xen package not installed')
class TC_40_PVGrub(qubes.tests.SystemTestsMixin):
    def setUp(self):
        super(TC_40_PVGrub, self).setUp()
        supported = False
        if self.template.startswith('fedora-'):
            supported = True
        elif self.template.startswith('debian-'):
            supported = True
        if not supported:
            self.skipTest("Template {} not supported by this test".format(
                self.template))

    def install_packages(self, vm):
        if self.template.startswith('fedora-'):
            cmd_install1 = 'yum clean expire-cache && ' \
                           'yum install -y qubes-kernel-vm-support grub2-tools'
            cmd_install2 = 'yum install -y kernel kernel-devel'
            cmd_update_grub = 'grub2-mkconfig -o /boot/grub2/grub.cfg'
        elif self.template.startswith('debian-'):
            cmd_install1 = 'apt-get update && apt-get install -y ' \
                           'qubes-kernel-vm-support grub2-common'
            cmd_install2 = 'apt-get install -y linux-image-amd64'
            cmd_update_grub = 'mkdir /boot/grub && update-grub2'
        else:
            assert False, "Unsupported template?!"

        for cmd in [cmd_install1, cmd_install2, cmd_update_grub]:
            p = vm.run(cmd, user="root", passio_popen=True, passio_stderr=True)
            (stdout, stderr) = p.communicate()
            self.assertEquals(p.returncode, 0,
                              "Failed command: {}\nSTDOUT: {}\nSTDERR: {}"
                              .format(cmd, stdout, stderr))

    def get_kernel_version(self, vm):
        if self.template.startswith('fedora-'):
            cmd_get_kernel_version = 'rpm -q kernel|sort -n|tail -1|' \
                                     'cut -d - -f 2-'
        elif self.template.startswith('debian-'):
            cmd_get_kernel_version = \
                'dpkg-query --showformat=\'${Package}\\n\' --show ' \
                '\'linux-image-*-amd64\'|sort -n|tail -1|cut -d - -f 3-'
        else:
            raise RuntimeError("Unsupported template?!")

        p = vm.run(cmd_get_kernel_version, user="root", passio_popen=True)
        (kver, _) = p.communicate()
        self.assertEquals(p.returncode, 0,
                          "Failed command: {}".format(cmd_get_kernel_version))
        return kver.strip()

    def test_000_standalone_vm(self):
        testvm1 = self.qc.add_new_vm("QubesAppVm",
                                     template=None,
                                     name=self.make_vm_name('vm1'))
        testvm1.create_on_disk(verbose=False,
                               source_template=self.qc.get_vm_by_name(
                                   self.template))
        self.save_and_reload_db()
        self.qc.unlock_db()
        testvm1 = self.qc[testvm1.qid]
        testvm1.start()
        self.install_packages(testvm1)
        kver = self.get_kernel_version(testvm1)
        self.shutdown_and_wait(testvm1)

        self.qc.lock_db_for_writing()
        self.qc.load()
        testvm1 = self.qc[testvm1.qid]
        testvm1.kernel = 'pvgrub2'
        self.save_and_reload_db()
        self.qc.unlock_db()
        testvm1 = self.qc[testvm1.qid]
        testvm1.start()
        p = testvm1.run('uname -r', passio_popen=True)
        (actual_kver, _) = p.communicate()
        self.assertEquals(actual_kver.strip(), kver)

    def test_010_template_based_vm(self):
        test_template = self.qc.add_new_vm("QubesTemplateVm",
                                           template=None,
                                           name=self.make_vm_name('template'))
        test_template.clone_attrs(self.qc.get_vm_by_name(self.template))
        test_template.clone_disk_files(
            src_vm=self.qc.get_vm_by_name(self.template),
            verbose=False)

        testvm1 = self.qc.add_new_vm("QubesAppVm",
                                     template=test_template,
                                     name=self.make_vm_name('vm1'))
        testvm1.create_on_disk(verbose=False,
                               source_template=test_template)
        self.save_and_reload_db()
        self.qc.unlock_db()
        test_template = self.qc[test_template.qid]
        testvm1 = self.qc[testvm1.qid]
        test_template.start()
        self.install_packages(test_template)
        kver = self.get_kernel_version(test_template)
        self.shutdown_and_wait(test_template)

        self.qc.lock_db_for_writing()
        self.qc.load()
        test_template = self.qc[test_template.qid]
        test_template.kernel = 'pvgrub2'
        testvm1 = self.qc[testvm1.qid]
        testvm1.kernel = 'pvgrub2'
        self.save_and_reload_db()
        self.qc.unlock_db()

        # Check if TemplateBasedVM boots and has the right kernel
        testvm1 = self.qc[testvm1.qid]
        testvm1.start()
        p = testvm1.run('uname -r', passio_popen=True)
        (actual_kver, _) = p.communicate()
        self.assertEquals(actual_kver.strip(), kver)

        # And the same for the TemplateVM itself
        test_template = self.qc[test_template.qid]
        test_template.start()
        p = test_template.run('uname -r', passio_popen=True)
        (actual_kver, _) = p.communicate()
        self.assertEquals(actual_kver.strip(), kver)

@unittest.skipUnless(
    spawn.find_executable('xprop') and
    spawn.find_executable('xdotool') and
    spawn.find_executable('wmctrl'),
    "xprop or xdotool or wmctrl not installed")
class TC_50_MimeHandlers(qubes.tests.SystemTestsMixin):
    @classmethod
    def setUpClass(cls):
        if cls.template == 'whonix-gw' or 'minimal' in cls.template:
            raise unittest.SkipTest(
                'Template {} not supported by this test'.format(cls.template))

        if cls.template == 'whonix-ws':
            # TODO remove when Whonix-based DispVMs will work (Whonix 13?)
            raise unittest.SkipTest(
                'Template {} not supported by this test'.format(cls.template))

        qc = QubesVmCollection()

        cls.kill_test_vms(qc, prefix=qubes.tests.CLSVMPREFIX)

        qc.lock_db_for_writing()
        qc.load()

        cls.remove_test_vms(qc, qubes.qubes.vmm.libvirt_conn,
                            prefix=qubes.tests.CLSVMPREFIX)

        cls.source_vmname = cls.make_vm_name('source', True)
        source_vm = qc.add_new_vm("QubesAppVm",
                                  template=qc.get_vm_by_name(cls.template),
                                  name=cls.source_vmname)
        source_vm.create_on_disk(verbose=False)

        cls.target_vmname = cls.make_vm_name('target', True)
        target_vm = qc.add_new_vm("QubesAppVm",
                                  template=qc.get_vm_by_name(cls.template),
                                  name=cls.target_vmname)
        target_vm.create_on_disk(verbose=False)

        qc.save()
        qc.unlock_db()
        source_vm.start()
        target_vm.start()

        # make sure that DispVMs will be started of the same template
        retcode = subprocess.call(['/usr/bin/qvm-create-default-dvm',
                                   cls.template],
                                  stderr=open(os.devnull, 'w'))
        assert retcode == 0, "Error preparing DispVM"

    def setUp(self):
        super(TC_50_MimeHandlers, self).setUp()
        self.source_vm = self.qc.get_vm_by_name(self.source_vmname)
        self.target_vm = self.qc.get_vm_by_name(self.target_vmname)

    def get_window_class(self, winid, dispvm=False):
        (vm_winid, _) = subprocess.Popen(
            ['xprop', '-id', winid, '_QUBES_VMWINDOWID'],
            stdout=subprocess.PIPE
        ).communicate()
        vm_winid = vm_winid.split("#")[1].strip('\n" ')
        if dispvm:
            (vmname, _) = subprocess.Popen(
                ['xprop', '-id', winid, '_QUBES_VMNAME'],
                stdout=subprocess.PIPE
            ).communicate()
            vmname = vmname.split("=")[1].strip('\n" ')
            window_class = None
            while window_class is None:
                # XXX to use self.qc.get_vm_by_name would require reloading
                # qubes.xml, so use qvm-run instead
                xprop = subprocess.Popen(
                    ['qvm-run', '-p', vmname, 'xprop -id {} WM_CLASS'.format(
                        vm_winid)], stdout=subprocess.PIPE)
                (window_class, _) = xprop.communicate()
                if xprop.returncode != 0:
                    self.skipTest("xprop failed, not installed?")
                if 'not found' in window_class:
                    # WM_CLASS not set yet, wait a little
                    time.sleep(0.1)
                    window_class = None
        else:
            window_class = None
            while window_class is None:
                xprop = self.target_vm.run(
                    'xprop -id {} WM_CLASS'.format(vm_winid),
                    passio_popen=True)
                (window_class, _) = xprop.communicate()
                if xprop.returncode != 0:
                    self.skipTest("xprop failed, not installed?")
                if 'not found' in window_class:
                    # WM_CLASS not set yet, wait a little
                    time.sleep(0.1)
                    window_class = None
        # output: WM_CLASS(STRING) = "gnome-terminal-server", "Gnome-terminal"
        try:
            window_class = window_class.split("=")[1].split(",")[0].strip('\n" ')
        except IndexError:
            raise Exception(
                "Unexpected output from xprop: '{}'".format(window_class))

        return window_class

    def open_file_and_check_viewer(self, filename, expected_app_titles,
                                   expected_app_classes, dispvm=False):
        self.qc.unlock_db()
        if dispvm:
            p = self.source_vm.run("qvm-open-in-dvm {}".format(filename),
                                   passio_popen=True)
            vmpattern = "disp*"
        else:
            p = self.source_vm.run("qvm-open-in-vm {} {}".format(
                self.target_vmname, filename), passio_popen=True)
            vmpattern = self.target_vmname
        if not dispvm:
            # For opening a file in DispVM default policy is set to "allow"
            self.enter_keys_in_window('Question', ['y'])
        wait_count = 0
        winid = None
        window_title = None
        while True:
            search = subprocess.Popen(['xdotool', 'search',
                                       '--onlyvisible', '--class', vmpattern],
                                      stdout=subprocess.PIPE,
                                      stderr=open(os.path.devnull, 'w'))
            retcode = search.wait()
            if retcode == 0:
                winid = search.stdout.read().strip()
                # get window title
                (window_title, _) = subprocess.Popen(
                    ['xdotool', 'getwindowname', winid], stdout=subprocess.PIPE). \
                    communicate()
                window_title = window_title.strip()
                # ignore LibreOffice splash screen and window with no title
                # set yet
                if window_title and not window_title.startswith("LibreOffice")\
                        and not window_title == 'VMapp command':
                    break
            wait_count += 1
            if wait_count > 100:
                self.fail("Timeout while waiting for editor window")
            time.sleep(0.3)

        # get window class
        window_class = self.get_window_class(winid, dispvm)
        # close the window - we've got the window class, it is no longer needed
        subprocess.check_call(['wmctrl', '-i', '-c', winid])
        p.wait()
        self.wait_for_window(window_title, show=False)

        def check_matches(obj, patterns):
            return any((pat.search(obj) if isinstance(pat, type(re.compile('')))
                        else pat in obj) for pat in patterns)

        if not check_matches(window_title, expected_app_titles) and \
                not check_matches(window_class, expected_app_classes):
            self.fail("Opening file {} resulted in window '{} ({})', which is "
                      "none of {!r} ({!r})".format(
                          filename, window_title, window_class,
                          expected_app_titles, expected_app_classes))

    def prepare_txt(self, filename):
        p = self.source_vm.run("cat > {}".format(filename), passio_popen=True)
        p.stdin.write("This is test\n")
        p.stdin.close()
        retcode = p.wait()
        assert retcode == 0, "Failed to write {} file".format(filename)

    def prepare_pdf(self, filename):
        self.prepare_txt("/tmp/source.txt")
        cmd = "convert /tmp/source.txt {}".format(filename)
        retcode = self.source_vm.run(cmd, wait=True)
        assert retcode == 0, "Failed to run '{}'".format(cmd)

    def prepare_doc(self, filename):
        self.prepare_txt("/tmp/source.txt")
        cmd = "unoconv -f doc -o {} /tmp/source.txt".format(filename)
        retcode = self.source_vm.run(cmd, wait=True)
        if retcode != 0:
            self.skipTest("Failed to run '{}', not installed?".format(cmd))

    def prepare_pptx(self, filename):
        self.prepare_txt("/tmp/source.txt")
        cmd = "unoconv -f pptx -o {} /tmp/source.txt".format(filename)
        retcode = self.source_vm.run(cmd, wait=True)
        if retcode != 0:
            self.skipTest("Failed to run '{}', not installed?".format(cmd))

    def prepare_png(self, filename):
        self.prepare_txt("/tmp/source.txt")
        cmd = "convert /tmp/source.txt {}".format(filename)
        retcode = self.source_vm.run(cmd, wait=True)
        if retcode != 0:
            self.skipTest("Failed to run '{}', not installed?".format(cmd))

    def prepare_jpg(self, filename):
        self.prepare_txt("/tmp/source.txt")
        cmd = "convert /tmp/source.txt {}".format(filename)
        retcode = self.source_vm.run(cmd, wait=True)
        if retcode != 0:
            self.skipTest("Failed to run '{}', not installed?".format(cmd))

    def test_000_txt(self):
        filename = "/home/user/test_file.txt"
        self.prepare_txt(filename)
        self.open_file_and_check_viewer(filename, ["vim"],
                                        ["gedit", "emacs"])

    def test_001_pdf(self):
        filename = "/home/user/test_file.pdf"
        self.prepare_pdf(filename)
        self.open_file_and_check_viewer(filename, [],
                                        ["evince"])

    def test_002_doc(self):
        filename = "/home/user/test_file.doc"
        self.prepare_doc(filename)
        self.open_file_and_check_viewer(filename, [],
                                        ["libreoffice", "abiword"])

    def test_003_pptx(self):
        filename = "/home/user/test_file.pptx"
        self.prepare_pptx(filename)
        self.open_file_and_check_viewer(filename, [],
                                        ["libreoffice"])

    def test_004_png(self):
        filename = "/home/user/test_file.png"
        self.prepare_png(filename)
        self.open_file_and_check_viewer(filename, [],
                                        ["shotwell", "eog", "display"])

    def test_005_jpg(self):
        filename = "/home/user/test_file.jpg"
        self.prepare_jpg(filename)
        self.open_file_and_check_viewer(filename, [],
                                        ["shotwell", "eog", "display"])

    def test_006_jpeg(self):
        filename = "/home/user/test_file.jpeg"
        self.prepare_jpg(filename)
        self.open_file_and_check_viewer(filename, [],
                                        ["shotwell", "eog", "display"])

    def test_100_txt_dispvm(self):
        filename = "/home/user/test_file.txt"
        self.prepare_txt(filename)
        self.open_file_and_check_viewer(filename, ["vim"],
                                        ["gedit", "emacs"],
                                        dispvm=True)

    def test_101_pdf_dispvm(self):
        filename = "/home/user/test_file.pdf"
        self.prepare_pdf(filename)
        self.open_file_and_check_viewer(filename, [],
                                        ["evince"],
                                        dispvm=True)

    def test_102_doc_dispvm(self):
        filename = "/home/user/test_file.doc"
        self.prepare_doc(filename)
        self.open_file_and_check_viewer(filename, [],
                                        ["libreoffice", "abiword"],
                                        dispvm=True)

    def test_103_pptx_dispvm(self):
        filename = "/home/user/test_file.pptx"
        self.prepare_pptx(filename)
        self.open_file_and_check_viewer(filename, [],
                                        ["libreoffice"],
                                        dispvm=True)

    def test_104_png_dispvm(self):
        filename = "/home/user/test_file.png"
        self.prepare_png(filename)
        self.open_file_and_check_viewer(filename, [],
                                        ["shotwell", "eog", "display"],
                                        dispvm=True)

    def test_105_jpg_dispvm(self):
        filename = "/home/user/test_file.jpg"
        self.prepare_jpg(filename)
        self.open_file_and_check_viewer(filename, [],
                                        ["shotwell", "eog", "display"],
                                        dispvm=True)

    def test_106_jpeg_dispvm(self):
        filename = "/home/user/test_file.jpeg"
        self.prepare_jpg(filename)
        self.open_file_and_check_viewer(filename, [],
                                        ["shotwell", "eog", "display"],
                                        dispvm=True)


def load_tests(loader, tests, pattern):
    try:
        qc = qubes.qubes.QubesVmCollection()
        qc.lock_db_for_reading()
        qc.load()
        qc.unlock_db()
        templates = [vm.name for vm in qc.values() if
                     isinstance(vm, qubes.qubes.QubesTemplateVm)]
    except OSError:
        templates = []
    for template in templates:
        tests.addTests(loader.loadTestsFromTestCase(
            type(
                'TC_00_AppVM_' + template,
                (TC_00_AppVMMixin, qubes.tests.QubesTestCase),
                {'template': template})))

        tests.addTests(loader.loadTestsFromTestCase(
            type(
                'TC_20_DispVM_' + template,
                (TC_20_DispVMMixin, qubes.tests.QubesTestCase),
                {'template': template})))
        tests.addTests(loader.loadTestsFromTestCase(
            type(
                'TC_40_PVGrub_' + template,
                (TC_40_PVGrub, qubes.tests.QubesTestCase),
                {'template': template})))

        tests.addTests(loader.loadTestsFromTestCase(
            type(
                'TC_50_MimeHandlers_' + template,
                (TC_50_MimeHandlers, qubes.tests.QubesTestCase),
                {'template': template})))

    return tests