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  • Committer: Teddy Hogeborn
  • Date: 2015-12-03 21:06:34 UTC
  • Revision ID: teddy@recompile.se-20151203210634-5dcyccalld40cygn
http://bugs.debian.org/806073
* debian/rules (override_dh_fixperms): Split into
                                       "override_dh_fixperms-arch" and
                                       "override_dh_fixperms-indep".
                                       Fixes Debian bug #806073.

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mandos-monitor
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3
# 
4
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# Mandos Monitor - Control and monitor the Mandos server
5
5
# 
6
 
# Copyright © 2009-2012 Teddy Hogeborn
7
 
# Copyright © 2009-2012 Björn Påhlsson
 
6
# Copyright © 2009-2015 Teddy Hogeborn
 
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# Copyright © 2009-2015 Björn Påhlsson
8
8
# 
9
9
# This program is free software: you can redistribute it and/or modify
10
10
# it under the terms of the GNU General Public License as published by
25
25
 
26
26
from __future__ import (division, absolute_import, print_function,
27
27
                        unicode_literals)
28
 
 
29
 
from future_builtins import *
 
28
try:
 
29
    from future_builtins import *
 
30
except ImportError:
 
31
    pass
30
32
 
31
33
import sys
32
34
import os
33
 
import signal
34
35
 
35
36
import datetime
36
37
 
38
39
import urwid
39
40
 
40
41
from dbus.mainloop.glib import DBusGMainLoop
41
 
import gobject
 
42
try:
 
43
    import gobject
 
44
except ImportError:
 
45
    from gi.repository import GObject as gobject
42
46
 
43
47
import dbus
44
48
 
45
 
import UserList
46
 
 
47
49
import locale
48
50
 
 
51
if sys.version_info.major == 2:
 
52
    str = unicode
 
53
 
49
54
locale.setlocale(locale.LC_ALL, '')
50
55
 
51
56
import logging
55
60
domain = 'se.recompile'
56
61
server_interface = domain + '.Mandos'
57
62
client_interface = domain + '.Mandos.Client'
58
 
version = "1.5.3"
59
 
 
60
 
# Always run in monochrome mode
61
 
urwid.curses_display.curses.has_colors = lambda : False
62
 
 
63
 
# Urwid doesn't support blinking, but we want it.  Since we have no
64
 
# use for underline on its own, we make underline also always blink.
65
 
urwid.curses_display.curses.A_UNDERLINE |= (
66
 
    urwid.curses_display.curses.A_BLINK)
 
63
version = "1.7.1"
 
64
 
 
65
try:
 
66
    dbus.OBJECT_MANAGER_IFACE
 
67
except AttributeError:
 
68
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
67
69
 
68
70
def isoformat_to_datetime(iso):
69
71
    "Parse an ISO 8601 date string to a datetime.datetime()"
90
92
        self.proxy = proxy_object # Mandos Client proxy object
91
93
        self.properties = dict() if properties is None else properties
92
94
        self.property_changed_match = (
93
 
            self.proxy.connect_to_signal("PropertyChanged",
94
 
                                         self._property_changed,
95
 
                                         client_interface,
 
95
            self.proxy.connect_to_signal("PropertiesChanged",
 
96
                                         self.properties_changed,
 
97
                                         dbus.PROPERTIES_IFACE,
96
98
                                         byte_arrays=True))
97
99
        
98
100
        if properties is None:
103
105
        
104
106
        super(MandosClientPropertyCache, self).__init__(**kwargs)
105
107
    
106
 
    def _property_changed(self, property, value):
107
 
        """Helper which takes positional arguments"""
108
 
        return self.property_changed(property=property, value=value)
109
 
    
110
 
    def property_changed(self, property=None, value=None):
111
 
        """This is called whenever we get a PropertyChanged signal
112
 
        It updates the changed property in the "properties" dict.
 
108
    def properties_changed(self, interface, properties, invalidated):
 
109
        """This is called whenever we get a PropertiesChanged signal
 
110
        It updates the changed properties in the "properties" dict.
113
111
        """
114
112
        # Update properties dict with new value
115
 
        self.properties[property] = value
 
113
        if interface == client_interface:
 
114
            self.properties.update(properties)
116
115
    
117
116
    def delete(self):
118
117
        self.property_changed_match.remove()
134
133
        self.logger = logger
135
134
        
136
135
        self._update_timer_callback_tag = None
137
 
        self._update_timer_callback_lock = 0
138
136
        
139
137
        # The widget shown normally
140
138
        self._text_widget = urwid.Text("")
144
142
        self.update()
145
143
        self.opened = False
146
144
        
147
 
        last_checked_ok = isoformat_to_datetime(self.properties
148
 
                                                ["LastCheckedOK"])
149
 
        
150
 
        if self.properties ["LastCheckerStatus"] != 0:
151
 
            self.using_timer(True)
152
 
        
153
 
        if self.need_approval:
154
 
            self.using_timer(True)
155
 
        
156
145
        self.match_objects = (
157
146
            self.proxy.connect_to_signal("CheckerCompleted",
158
147
                                         self.checker_completed,
174
163
                                         self.rejected,
175
164
                                         client_interface,
176
165
                                         byte_arrays=True))
177
 
        #self.logger('Created client {0}'
178
 
        #            .format(self.properties["Name"]))
179
 
    
180
 
    def property_changed(self, property=None, value=None):
181
 
        super(self, MandosClientWidget).property_changed(property,
182
 
                                                         value)
183
 
        if property == "ApprovalPending":
184
 
            using_timer(bool(value))
185
 
        if property == "LastCheckerStatus":
186
 
            using_timer(value != 0)
187
 
            #self.logger('Checker for client {0} (command "{1}") was '
188
 
            #            ' successful'.format(self.properties["Name"],
189
 
            #                                 command))
 
166
        self.logger('Created client {}'
 
167
                    .format(self.properties["Name"]), level=0)
190
168
    
191
169
    def using_timer(self, flag):
192
170
        """Call this method with True or False when timer should be
193
171
        activated or deactivated.
194
172
        """
195
 
        old = self._update_timer_callback_lock
196
 
        if flag:
197
 
            self._update_timer_callback_lock += 1
198
 
        else:
199
 
            self._update_timer_callback_lock -= 1
200
 
        if old == 0 and self._update_timer_callback_lock:
 
173
        if flag and self._update_timer_callback_tag is None:
201
174
            # Will update the shown timer value every second
202
175
            self._update_timer_callback_tag = (gobject.timeout_add
203
176
                                               (1000,
204
177
                                                self.update_timer))
205
 
        elif old and self._update_timer_callback_lock == 0:
 
178
        elif not (flag or self._update_timer_callback_tag is None):
206
179
            gobject.source_remove(self._update_timer_callback_tag)
207
180
            self._update_timer_callback_tag = None
208
181
    
209
182
    def checker_completed(self, exitstatus, condition, command):
210
183
        if exitstatus == 0:
 
184
            self.logger('Checker for client {} (command "{}")'
 
185
                        ' succeeded'.format(self.properties["Name"],
 
186
                                            command), level=0)
211
187
            self.update()
212
188
            return
213
189
        # Checker failed
214
190
        if os.WIFEXITED(condition):
215
 
            self.logger('Checker for client {0} (command "{1}")'
216
 
                        ' failed with exit code {2}'
 
191
            self.logger('Checker for client {} (command "{}") failed'
 
192
                        ' with exit code {}'
217
193
                        .format(self.properties["Name"], command,
218
194
                                os.WEXITSTATUS(condition)))
219
195
        elif os.WIFSIGNALED(condition):
220
 
            self.logger('Checker for client {0} (command "{1}") was'
221
 
                        ' killed by signal {2}'
 
196
            self.logger('Checker for client {} (command "{}") was'
 
197
                        ' killed by signal {}'
222
198
                        .format(self.properties["Name"], command,
223
199
                                os.WTERMSIG(condition)))
224
 
        elif os.WCOREDUMP(condition):
225
 
            self.logger('Checker for client {0} (command "{1}")'
226
 
                        ' dumped core'
227
 
                        .format(self.properties["Name"], command))
228
 
        else:
229
 
            self.logger('Checker for client {0} completed'
230
 
                        ' mysteriously'
231
 
                        .format(self.properties["Name"]))
232
200
        self.update()
233
201
    
234
202
    def checker_started(self, command):
235
 
        """Server signals that a checker started. This could be useful
236
 
           to log in the future. """
237
 
        #self.logger('Client {0} started checker "{1}"'
238
 
        #            .format(self.properties["Name"],
239
 
        #                    unicode(command)))
240
 
        pass
 
203
        """Server signals that a checker started."""
 
204
        self.logger('Client {} started checker "{}"'
 
205
                    .format(self.properties["Name"],
 
206
                            command), level=0)
241
207
    
242
208
    def got_secret(self):
243
 
        self.logger('Client {0} received its secret'
 
209
        self.logger('Client {} received its secret'
244
210
                    .format(self.properties["Name"]))
245
211
    
246
212
    def need_approval(self, timeout, default):
247
213
        if not default:
248
 
            message = 'Client {0} needs approval within {1} seconds'
 
214
            message = 'Client {} needs approval within {} seconds'
249
215
        else:
250
 
            message = 'Client {0} will get its secret in {1} seconds'
 
216
            message = 'Client {} will get its secret in {} seconds'
251
217
        self.logger(message.format(self.properties["Name"],
252
218
                                   timeout/1000))
253
 
        self.using_timer(True)
254
219
    
255
220
    def rejected(self, reason):
256
 
        self.logger('Client {0} was rejected; reason: {1}'
 
221
        self.logger('Client {} was rejected; reason: {}'
257
222
                    .format(self.properties["Name"], reason))
258
223
    
259
224
    def selectable(self):
282
247
                          "bold-underline-blink":
283
248
                              "bold-underline-blink-standout",
284
249
                          }
285
 
 
 
250
        
286
251
        # Rebuild focus and non-focus widgets using current properties
287
 
 
 
252
        
288
253
        # Base part of a client. Name!
289
254
        base = '{name}: '.format(name=self.properties["Name"])
290
255
        if not self.properties["Enabled"]:
291
256
            message = "DISABLED"
 
257
            self.using_timer(False)
292
258
        elif self.properties["ApprovalPending"]:
293
259
            timeout = datetime.timedelta(milliseconds
294
260
                                         = self.properties
296
262
            last_approval_request = isoformat_to_datetime(
297
263
                self.properties["LastApprovalRequest"])
298
264
            if last_approval_request is not None:
299
 
                timer = timeout - (datetime.datetime.utcnow()
300
 
                                   - last_approval_request)
 
265
                timer = max(timeout - (datetime.datetime.utcnow()
 
266
                                       - last_approval_request),
 
267
                            datetime.timedelta())
301
268
            else:
302
269
                timer = datetime.timedelta()
303
270
            if self.properties["ApprovedByDefault"]:
304
 
                message = "Approval in {0}. (d)eny?"
 
271
                message = "Approval in {}. (d)eny?"
305
272
            else:
306
 
                message = "Denial in {0}. (a)pprove?"
307
 
            message = message.format(unicode(timer).rsplit(".", 1)[0])
 
273
                message = "Denial in {}. (a)pprove?"
 
274
            message = message.format(str(timer).rsplit(".", 1)[0])
 
275
            self.using_timer(True)
308
276
        elif self.properties["LastCheckerStatus"] != 0:
309
277
            # When checker has failed, show timer until client expires
310
278
            expires = self.properties["Expires"]
313
281
            else:
314
282
                expires = (datetime.datetime.strptime
315
283
                           (expires, '%Y-%m-%dT%H:%M:%S.%f'))
316
 
                timer = expires - datetime.datetime.utcnow()
 
284
                timer = max(expires - datetime.datetime.utcnow(),
 
285
                            datetime.timedelta())
317
286
            message = ('A checker has failed! Time until client'
318
 
                       ' gets disabled: {0}'
319
 
                       .format(unicode(timer).rsplit(".", 1)[0]))
 
287
                       ' gets disabled: {}'
 
288
                       .format(str(timer).rsplit(".", 1)[0]))
 
289
            self.using_timer(True)
320
290
        else:
321
291
            message = "enabled"
322
 
        self._text = "{0}{1}".format(base, message)
323
 
            
 
292
            self.using_timer(False)
 
293
        self._text = "{}{}".format(base, message)
 
294
        
324
295
        if not urwid.supports_unicode():
325
296
            self._text = self._text.encode("ascii", "replace")
326
297
        textlist = [("normal", self._text)]
364
335
        """Handle keys.
365
336
        This overrides the method from urwid.FlowWidget"""
366
337
        if key == "+":
367
 
            self.proxy.Enable(dbus_interface = client_interface,
368
 
                              ignore_reply=True)
 
338
            self.proxy.Set(client_interface, "Enabled",
 
339
                           dbus.Boolean(True), ignore_reply = True,
 
340
                           dbus_interface = dbus.PROPERTIES_IFACE)
369
341
        elif key == "-":
370
 
            self.proxy.Disable(dbus_interface = client_interface,
371
 
                               ignore_reply=True)
 
342
            self.proxy.Set(client_interface, "Enabled", False,
 
343
                           ignore_reply = True,
 
344
                           dbus_interface = dbus.PROPERTIES_IFACE)
372
345
        elif key == "a":
373
346
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
374
347
                               dbus_interface = client_interface,
382
355
                                                  .object_path,
383
356
                                                  ignore_reply=True)
384
357
        elif key == "s":
385
 
            self.proxy.StartChecker(dbus_interface = client_interface,
386
 
                                    ignore_reply=True)
 
358
            self.proxy.Set(client_interface, "CheckerRunning",
 
359
                           dbus.Boolean(True), ignore_reply = True,
 
360
                           dbus_interface = dbus.PROPERTIES_IFACE)
387
361
        elif key == "S":
388
 
            self.proxy.StopChecker(dbus_interface = client_interface,
389
 
                                   ignore_reply=True)
 
362
            self.proxy.Set(client_interface, "CheckerRunning",
 
363
                           dbus.Boolean(False), ignore_reply = True,
 
364
                           dbus_interface = dbus.PROPERTIES_IFACE)
390
365
        elif key == "C":
391
366
            self.proxy.CheckedOK(dbus_interface = client_interface,
392
367
                                 ignore_reply=True)
400
375
        else:
401
376
            return key
402
377
    
403
 
    def property_changed(self, property=None, **kwargs):
404
 
        """Call self.update() if old value is not new value.
 
378
    def properties_changed(self, interface, properties, invalidated):
 
379
        """Call self.update() if any properties changed.
405
380
        This overrides the method from MandosClientPropertyCache"""
406
 
        property_name = unicode(property)
407
 
        old_value = self.properties.get(property_name)
408
 
        super(MandosClientWidget, self).property_changed(
409
 
            property=property, **kwargs)
410
 
        if self.properties.get(property_name) != old_value:
 
381
        old_values = { key: self.properties.get(key)
 
382
                       for key in properties.keys() }
 
383
        super(MandosClientWidget, self).properties_changed(
 
384
            interface, properties, invalidated)
 
385
        if any(old_values[key] != self.properties.get(key)
 
386
               for key in old_values):
411
387
            self.update()
412
388
 
413
389
 
427
403
    """This is the entire user interface - the whole screen
428
404
    with boxes, lists of client widgets, etc.
429
405
    """
430
 
    def __init__(self, max_log_length=1000):
 
406
    def __init__(self, max_log_length=1000, log_level=1):
431
407
        DBusGMainLoop(set_as_default=True)
432
408
        
433
409
        self.screen = urwid.curses_display.Screen()
436
412
                ("normal",
437
413
                 "default", "default", None),
438
414
                ("bold",
439
 
                 "default", "default", "bold"),
 
415
                 "bold", "default", "bold"),
440
416
                ("underline-blink",
441
 
                 "default", "default", "underline"),
 
417
                 "underline,blink", "default", "underline,blink"),
442
418
                ("standout",
443
 
                 "default", "default", "standout"),
 
419
                 "standout", "default", "standout"),
444
420
                ("bold-underline-blink",
445
 
                 "default", "default", ("bold", "underline")),
 
421
                 "bold,underline,blink", "default", "bold,underline,blink"),
446
422
                ("bold-standout",
447
 
                 "default", "default", ("bold", "standout")),
 
423
                 "bold,standout", "default", "bold,standout"),
448
424
                ("underline-blink-standout",
449
 
                 "default", "default", ("underline", "standout")),
 
425
                 "underline,blink,standout", "default",
 
426
                 "underline,blink,standout"),
450
427
                ("bold-underline-blink-standout",
451
 
                 "default", "default", ("bold", "underline",
452
 
                                          "standout")),
 
428
                 "bold,underline,blink,standout", "default",
 
429
                 "bold,underline,blink,standout"),
453
430
                ))
454
431
        
455
432
        if urwid.supports_unicode():
470
447
        self.log = []
471
448
        self.max_log_length = max_log_length
472
449
        
 
450
        self.log_level = log_level
 
451
        
473
452
        # We keep a reference to the log widget so we can remove it
474
453
        # from the ListWalker without it getting destroyed
475
454
        self.logbox = ConstrainedListBox(self.log)
489
468
        self.main_loop = gobject.MainLoop()
490
469
    
491
470
    def client_not_found(self, fingerprint, address):
492
 
        self.log_message("Client with address {0} and fingerprint"
493
 
                         " {1} could not be found"
 
471
        self.log_message("Client with address {} and fingerprint {}"
 
472
                         " could not be found"
494
473
                         .format(address, fingerprint))
495
474
    
496
475
    def rebuild(self):
509
488
            self.uilist.append(self.logbox)
510
489
        self.topwidget = urwid.Pile(self.uilist)
511
490
    
512
 
    def log_message(self, message):
 
491
    def log_message(self, message, level=1):
 
492
        """Log message formatted with timestamp"""
 
493
        if level < self.log_level:
 
494
            return
513
495
        timestamp = datetime.datetime.now().isoformat()
514
 
        self.log_message_raw(timestamp + ": " + message)
 
496
        self.log_message_raw("{}: {}".format(timestamp, message),
 
497
                             level=level)
515
498
    
516
 
    def log_message_raw(self, markup):
 
499
    def log_message_raw(self, markup, level=1):
517
500
        """Add a log message to the log buffer."""
 
501
        if level < self.log_level:
 
502
            return
518
503
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
519
504
        if (self.max_log_length
520
505
            and len(self.log) > self.max_log_length):
527
512
        """Toggle visibility of the log buffer."""
528
513
        self.log_visible = not self.log_visible
529
514
        self.rebuild()
530
 
        #self.log_message("Log visibility changed to: "
531
 
        #                 + unicode(self.log_visible))
 
515
        self.log_message("Log visibility changed to: {}"
 
516
                         .format(self.log_visible), level=0)
532
517
    
533
518
    def change_log_display(self):
534
519
        """Change type of log display.
539
524
            self.log_wrap = "clip"
540
525
        for textwidget in self.log:
541
526
            textwidget.set_wrap_mode(self.log_wrap)
542
 
        #self.log_message("Wrap mode: " + self.log_wrap)
 
527
        self.log_message("Wrap mode: {}".format(self.log_wrap),
 
528
                         level=0)
543
529
    
544
 
    def find_and_remove_client(self, path, name):
 
530
    def find_and_remove_client(self, path, interfaces):
545
531
        """Find a client by its object path and remove it.
546
532
        
547
 
        This is connected to the ClientRemoved signal from the
 
533
        This is connected to the InterfacesRemoved signal from the
548
534
        Mandos server object."""
 
535
        if client_interface not in interfaces:
 
536
            # Not a Mandos client object; ignore
 
537
            return
549
538
        try:
550
539
            client = self.clients_dict[path]
551
540
        except KeyError:
552
541
            # not found?
553
 
            self.log_message("Unknown client {0!r} ({1!r}) removed"
554
 
                             .format(name, path))
 
542
            self.log_message("Unknown client {!r} removed"
 
543
                             .format(path))
555
544
            return
556
545
        client.delete()
557
546
    
558
 
    def add_new_client(self, path):
 
547
    def add_new_client(self, path, ifs_and_props):
 
548
        """Find a client by its object path and remove it.
 
549
        
 
550
        This is connected to the InterfacesAdded signal from the
 
551
        Mandos server object.
 
552
        """
 
553
        if client_interface not in ifs_and_props:
 
554
            # Not a Mandos client object; ignore
 
555
            return
559
556
        client_proxy_object = self.bus.get_object(self.busname, path)
560
557
        self.add_client(MandosClientWidget(server_proxy_object
561
558
                                           =self.mandos_serv,
566
563
                                           delete_hook
567
564
                                           =self.remove_client,
568
565
                                           logger
569
 
                                           =self.log_message),
 
566
                                           =self.log_message,
 
567
                                           properties
 
568
                                           = dict(ifs_and_props[
 
569
                                               client_interface])),
570
570
                        path=path)
571
571
    
572
572
    def add_client(self, client, path=None):
574
574
        if path is None:
575
575
            path = client.proxy.object_path
576
576
        self.clients_dict[path] = client
577
 
        self.clients.sort(None, lambda c: c.properties["Name"])
 
577
        self.clients.sort(key=lambda c: c.properties["Name"])
578
578
        self.refresh()
579
579
    
580
580
    def remove_client(self, client, path=None):
582
582
        if path is None:
583
583
            path = client.proxy.object_path
584
584
        del self.clients_dict[path]
585
 
        if not self.clients_dict:
586
 
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
587
 
            # is completely emptied, we need to recreate it.
588
 
            self.clients = urwid.SimpleListWalker([])
589
 
            self.rebuild()
590
585
        self.refresh()
591
586
    
592
587
    def refresh(self):
605
600
        try:
606
601
            mandos_clients = (self.mandos_serv
607
602
                              .GetAllClientsWithProperties())
 
603
            if not mandos_clients:
 
604
                self.log_message_raw(("bold", "Note: Server has no clients."))
608
605
        except dbus.exceptions.DBusException:
 
606
            self.log_message_raw(("bold", "Note: No Mandos server running."))
609
607
            mandos_clients = dbus.Dictionary()
610
608
        
611
609
        (self.mandos_serv
612
 
         .connect_to_signal("ClientRemoved",
 
610
         .connect_to_signal("InterfacesRemoved",
613
611
                            self.find_and_remove_client,
614
 
                            dbus_interface=server_interface,
 
612
                            dbus_interface
 
613
                            = dbus.OBJECT_MANAGER_IFACE,
615
614
                            byte_arrays=True))
616
615
        (self.mandos_serv
617
 
         .connect_to_signal("ClientAdded",
 
616
         .connect_to_signal("InterfacesAdded",
618
617
                            self.add_new_client,
619
 
                            dbus_interface=server_interface,
 
618
                            dbus_interface
 
619
                            = dbus.OBJECT_MANAGER_IFACE,
620
620
                            byte_arrays=True))
621
621
        (self.mandos_serv
622
622
         .connect_to_signal("ClientNotFound",
623
623
                            self.client_not_found,
624
624
                            dbus_interface=server_interface,
625
625
                            byte_arrays=True))
626
 
        for path, client in mandos_clients.iteritems():
 
626
        for path, client in mandos_clients.items():
627
627
            client_proxy_object = self.bus.get_object(self.busname,
628
628
                                                      path)
629
629
            self.add_client(MandosClientWidget(server_proxy_object
676
676
            elif key == "window resize":
677
677
                self.size = self.screen.get_cols_rows()
678
678
                self.refresh()
679
 
            elif key == "\f":  # Ctrl-L
 
679
            elif key == "ctrl l":
 
680
                self.screen.clear()
680
681
                self.refresh()
681
682
            elif key == "l" or key == "D":
682
683
                self.toggle_log_display()
694
695
                                            "?: Help",
695
696
                                            "l: Log window toggle",
696
697
                                            "TAB: Switch window",
697
 
                                            "w: Wrap (log)"))))
 
698
                                            "w: Wrap (log lines)",
 
699
                                            "v: Toggle verbose log",
 
700
                                            ))))
698
701
                self.log_message_raw(("bold",
699
702
                                      "  "
700
703
                                      .join(("Clients:",
713
716
                else:
714
717
                    self.topwidget.set_focus(self.logbox)
715
718
                self.refresh()
 
719
            elif key == "v":
 
720
                if self.log_level == 0:
 
721
                    self.log_level = 1
 
722
                    self.log_message("Verbose mode: Off")
 
723
                else:
 
724
                    self.log_level = 0
 
725
                    self.log_message("Verbose mode: On")
716
726
            #elif (key == "end" or key == "meta >" or key == "G"
717
727
            #      or key == ">"):
718
728
            #    pass            # xxx end-of-buffer
741
751
    ui.run()
742
752
except KeyboardInterrupt:
743
753
    ui.screen.stop()
744
 
except Exception, e:
745
 
    ui.log_message(unicode(e))
 
754
except Exception as e:
 
755
    ui.log_message(str(e))
746
756
    ui.screen.stop()
747
757
    raise