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  • Committer: Teddy Hogeborn
  • Date: 2012-01-15 21:01:13 UTC
  • Revision ID: teddy@recompile.se-20120115210113-mzpkowq0opshtu30
* mandos.xml (CHECKING): Don't claim that a successful secret request
                         is equivalent to a successful checker.

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mandos-monitor
3
3
# 
4
4
# Mandos Monitor - Control and monitor the Mandos server
5
5
# 
6
 
# Copyright © 2009-2014 Teddy Hogeborn
7
 
# Copyright © 2009-2014 Björn Påhlsson
 
6
# Copyright © 2009-2012 Teddy Hogeborn
 
7
# Copyright © 2009-2012 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
17
17
#     GNU General Public License for more details.
18
18
# 
19
19
# You should have received a copy of the GNU General Public License
20
 
# along with this program.  If not, see
21
 
# <http://www.gnu.org/licenses/>.
 
20
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
22
21
# 
23
22
# Contact the authors at <mandos@recompile.se>.
24
23
# 
25
24
 
26
25
from __future__ import (division, absolute_import, print_function,
27
26
                        unicode_literals)
28
 
try:
29
 
    from future_builtins import *
30
 
except ImportError:
31
 
    pass
32
27
 
33
28
import sys
34
29
import os
 
30
import signal
35
31
 
36
32
import datetime
37
33
 
39
35
import urwid
40
36
 
41
37
from dbus.mainloop.glib import DBusGMainLoop
42
 
try:
43
 
    import gobject
44
 
except ImportError:
45
 
    from gi.repository import GObject as gobject
 
38
import gobject
46
39
 
47
40
import dbus
48
41
 
 
42
import UserList
 
43
 
49
44
import locale
50
45
 
51
 
if sys.version_info.major == 2:
52
 
    str = unicode
53
 
 
54
46
locale.setlocale(locale.LC_ALL, '')
55
47
 
56
48
import logging
60
52
domain = 'se.recompile'
61
53
server_interface = domain + '.Mandos'
62
54
client_interface = domain + '.Mandos.Client'
63
 
version = "1.6.8"
 
55
version = "1.5.2"
 
56
 
 
57
# Always run in monochrome mode
 
58
urwid.curses_display.curses.has_colors = lambda : False
 
59
 
 
60
# Urwid doesn't support blinking, but we want it.  Since we have no
 
61
# use for underline on its own, we make underline also always blink.
 
62
urwid.curses_display.curses.A_UNDERLINE |= (
 
63
    urwid.curses_display.curses.A_BLINK)
64
64
 
65
65
def isoformat_to_datetime(iso):
66
66
    "Parse an ISO 8601 date string to a datetime.datetime()"
83
83
    properties and calls a hook function when any of them are
84
84
    changed.
85
85
    """
86
 
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
86
    def __init__(self, proxy_object=None, *args, **kwargs):
87
87
        self.proxy = proxy_object # Mandos Client proxy object
88
 
        self.properties = dict() if properties is None else properties
 
88
        
 
89
        self.properties = dict()
89
90
        self.property_changed_match = (
90
 
            self.proxy.connect_to_signal("PropertiesChanged",
91
 
                                         self.properties_changed,
92
 
                                         dbus.PROPERTIES_IFACE,
 
91
            self.proxy.connect_to_signal("PropertyChanged",
 
92
                                         self.property_changed,
 
93
                                         client_interface,
93
94
                                         byte_arrays=True))
94
95
        
95
 
        if properties is None:
96
 
            self.properties.update(
97
 
                self.proxy.GetAll(client_interface,
98
 
                                  dbus_interface
99
 
                                  = dbus.PROPERTIES_IFACE))
100
 
        
101
 
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
96
        self.properties.update(
 
97
            self.proxy.GetAll(client_interface,
 
98
                              dbus_interface = dbus.PROPERTIES_IFACE))
 
99
 
 
100
        #XXX This breaks good super behaviour
 
101
#        super(MandosClientPropertyCache, self).__init__(
 
102
#            *args, **kwargs)
102
103
    
103
 
    def properties_changed(self, interface, properties, invalidated):
104
 
        """This is called whenever we get a PropertiesChanged signal
105
 
        It updates the changed properties in the "properties" dict.
 
104
    def property_changed(self, property=None, value=None):
 
105
        """This is called whenever we get a PropertyChanged signal
 
106
        It updates the changed property in the "properties" dict.
106
107
        """
107
108
        # Update properties dict with new value
108
 
        self.properties.update(properties)
 
109
        self.properties[property] = value
109
110
    
110
 
    def delete(self):
 
111
    def delete(self, *args, **kwargs):
111
112
        self.property_changed_match.remove()
 
113
        super(MandosClientPropertyCache, self).__init__(
 
114
            *args, **kwargs)
112
115
 
113
116
 
114
117
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
116
119
    """
117
120
    
118
121
    def __init__(self, server_proxy_object=None, update_hook=None,
119
 
                 delete_hook=None, logger=None, **kwargs):
 
122
                 delete_hook=None, logger=None, *args, **kwargs):
120
123
        # Called on update
121
124
        self.update_hook = update_hook
122
125
        # Called on delete
127
130
        self.logger = logger
128
131
        
129
132
        self._update_timer_callback_tag = None
 
133
        self._update_timer_callback_lock = 0
130
134
        
131
135
        # The widget shown normally
132
136
        self._text_widget = urwid.Text("")
133
137
        # The widget shown when we have focus
134
138
        self._focus_text_widget = urwid.Text("")
135
 
        super(MandosClientWidget, self).__init__(**kwargs)
 
139
        super(MandosClientWidget, self).__init__(
 
140
            update_hook=update_hook, delete_hook=delete_hook,
 
141
            *args, **kwargs)
136
142
        self.update()
137
143
        self.opened = False
138
144
        
 
145
        last_checked_ok = isoformat_to_datetime(self.properties
 
146
                                                ["LastCheckedOK"])
 
147
        
 
148
        if self.properties ["LastCheckerStatus"] != 0:
 
149
            self.using_timer(True)
 
150
        
 
151
        if self.need_approval:
 
152
            self.using_timer(True)
 
153
        
139
154
        self.match_objects = (
140
155
            self.proxy.connect_to_signal("CheckerCompleted",
141
156
                                         self.checker_completed,
157
172
                                         self.rejected,
158
173
                                         client_interface,
159
174
                                         byte_arrays=True))
160
 
        self.logger('Created client {}'
161
 
                    .format(self.properties["Name"]), level=0)
 
175
        #self.logger('Created client %s' % (self.properties["Name"]))
 
176
    
 
177
    def property_changed(self, property=None, value=None):
 
178
        super(self, MandosClientWidget).property_changed(property,
 
179
                                                         value)
 
180
        if property == "ApprovalPending":
 
181
            using_timer(bool(value))
 
182
        if property == "LastCheckerStatus":
 
183
            using_timer(value != 0)
 
184
            #self.logger('Checker for client %s (command "%s")'
 
185
            #            ' was successful'
 
186
            #            % (self.properties["Name"], command))
162
187
    
163
188
    def using_timer(self, flag):
164
189
        """Call this method with True or False when timer should be
165
190
        activated or deactivated.
166
191
        """
167
 
        if flag and self._update_timer_callback_tag is None:
 
192
        old = self._update_timer_callback_lock
 
193
        if flag:
 
194
            self._update_timer_callback_lock += 1
 
195
        else:
 
196
            self._update_timer_callback_lock -= 1
 
197
        if old == 0 and self._update_timer_callback_lock:
168
198
            # Will update the shown timer value every second
169
199
            self._update_timer_callback_tag = (gobject.timeout_add
170
200
                                               (1000,
171
201
                                                self.update_timer))
172
 
        elif not (flag or self._update_timer_callback_tag is None):
 
202
        elif old and self._update_timer_callback_lock == 0:
173
203
            gobject.source_remove(self._update_timer_callback_tag)
174
204
            self._update_timer_callback_tag = None
175
205
    
176
206
    def checker_completed(self, exitstatus, condition, command):
177
207
        if exitstatus == 0:
178
 
            self.logger('Checker for client {} (command "{}")'
179
 
                        ' succeeded'.format(self.properties["Name"],
180
 
                                            command), level=0)
181
208
            self.update()
182
209
            return
183
210
        # Checker failed
184
211
        if os.WIFEXITED(condition):
185
 
            self.logger('Checker for client {} (command "{}") failed'
186
 
                        ' with exit code {}'
187
 
                        .format(self.properties["Name"], command,
188
 
                                os.WEXITSTATUS(condition)))
 
212
            self.logger('Checker for client %s (command "%s")'
 
213
                        ' failed with exit code %s'
 
214
                        % (self.properties["Name"], command,
 
215
                           os.WEXITSTATUS(condition)))
189
216
        elif os.WIFSIGNALED(condition):
190
 
            self.logger('Checker for client {} (command "{}") was'
191
 
                        ' killed by signal {}'
192
 
                        .format(self.properties["Name"], command,
193
 
                                os.WTERMSIG(condition)))
 
217
            self.logger('Checker for client %s (command "%s")'
 
218
                        ' was killed by signal %s'
 
219
                        % (self.properties["Name"], command,
 
220
                           os.WTERMSIG(condition)))
194
221
        elif os.WCOREDUMP(condition):
195
 
            self.logger('Checker for client {} (command "{}") dumped'
196
 
                        ' core'.format(self.properties["Name"],
197
 
                                       command))
 
222
            self.logger('Checker for client %s (command "%s")'
 
223
                        ' dumped core'
 
224
                        % (self.properties["Name"], command))
198
225
        else:
199
 
            self.logger('Checker for client {} completed'
200
 
                        ' mysteriously'
201
 
                        .format(self.properties["Name"]))
 
226
            self.logger('Checker for client %s completed'
 
227
                        ' mysteriously')
202
228
        self.update()
203
229
    
204
230
    def checker_started(self, command):
205
 
        """Server signals that a checker started."""
206
 
        self.logger('Client {} started checker "{}"'
207
 
                    .format(self.properties["Name"],
208
 
                            command), level=0)
 
231
        """Server signals that a checker started. This could be useful
 
232
           to log in the future. """
 
233
        #self.logger('Client %s started checker "%s"'
 
234
        #            % (self.properties["Name"], unicode(command)))
 
235
        pass
209
236
    
210
237
    def got_secret(self):
211
 
        self.logger('Client {} received its secret'
212
 
                    .format(self.properties["Name"]))
 
238
        self.logger('Client %s received its secret'
 
239
                    % self.properties["Name"])
213
240
    
214
241
    def need_approval(self, timeout, default):
215
242
        if not default:
216
 
            message = 'Client {} needs approval within {} seconds'
 
243
            message = 'Client %s needs approval within %s seconds'
217
244
        else:
218
 
            message = 'Client {} will get its secret in {} seconds'
219
 
        self.logger(message.format(self.properties["Name"],
220
 
                                   timeout/1000))
 
245
            message = 'Client %s will get its secret in %s seconds'
 
246
        self.logger(message
 
247
                    % (self.properties["Name"], timeout/1000))
 
248
        self.using_timer(True)
221
249
    
222
250
    def rejected(self, reason):
223
 
        self.logger('Client {} was rejected; reason: {}'
224
 
                    .format(self.properties["Name"], reason))
 
251
        self.logger('Client %s was rejected; reason: %s'
 
252
                    % (self.properties["Name"], reason))
225
253
    
226
254
    def selectable(self):
227
255
        """Make this a "selectable" widget.
249
277
                          "bold-underline-blink":
250
278
                              "bold-underline-blink-standout",
251
279
                          }
252
 
        
 
280
 
253
281
        # Rebuild focus and non-focus widgets using current properties
254
 
        
 
282
 
255
283
        # Base part of a client. Name!
256
 
        base = '{name}: '.format(name=self.properties["Name"])
 
284
        base = ('%(name)s: '
 
285
                      % {"name": self.properties["Name"]})
257
286
        if not self.properties["Enabled"]:
258
287
            message = "DISABLED"
259
 
            self.using_timer(False)
260
288
        elif self.properties["ApprovalPending"]:
261
289
            timeout = datetime.timedelta(milliseconds
262
290
                                         = self.properties
264
292
            last_approval_request = isoformat_to_datetime(
265
293
                self.properties["LastApprovalRequest"])
266
294
            if last_approval_request is not None:
267
 
                timer = max(timeout - (datetime.datetime.utcnow()
268
 
                                       - last_approval_request),
269
 
                            datetime.timedelta())
 
295
                timer = timeout - (datetime.datetime.utcnow()
 
296
                                   - last_approval_request)
270
297
            else:
271
298
                timer = datetime.timedelta()
272
299
            if self.properties["ApprovedByDefault"]:
273
 
                message = "Approval in {}. (d)eny?"
 
300
                message = "Approval in %s. (d)eny?"
274
301
            else:
275
 
                message = "Denial in {}. (a)pprove?"
276
 
            message = message.format(str(timer).rsplit(".", 1)[0])
277
 
            self.using_timer(True)
 
302
                message = "Denial in %s. (a)pprove?"
 
303
            message = message % unicode(timer).rsplit(".", 1)[0]
278
304
        elif self.properties["LastCheckerStatus"] != 0:
279
 
            # When checker has failed, show timer until client expires
 
305
            # When checker has failed, print a timer until client expires
280
306
            expires = self.properties["Expires"]
281
307
            if expires == "":
282
308
                timer = datetime.timedelta(0)
283
309
            else:
284
 
                expires = (datetime.datetime.strptime
285
 
                           (expires, '%Y-%m-%dT%H:%M:%S.%f'))
286
 
                timer = max(expires - datetime.datetime.utcnow(),
287
 
                            datetime.timedelta())
 
310
                expires = datetime.datetime.strptime(expires,
 
311
                                                     '%Y-%m-%dT%H:%M:%S.%f')
 
312
                timer = expires - datetime.datetime.utcnow()
288
313
            message = ('A checker has failed! Time until client'
289
 
                       ' gets disabled: {}'
290
 
                       .format(str(timer).rsplit(".", 1)[0]))
291
 
            self.using_timer(True)
 
314
                       ' gets disabled: %s'
 
315
                           % unicode(timer).rsplit(".", 1)[0])
292
316
        else:
293
317
            message = "enabled"
294
 
            self.using_timer(False)
295
 
        self._text = "{}{}".format(base, message)
296
 
        
 
318
        self._text = "%s%s" % (base, message)
 
319
            
297
320
        if not urwid.supports_unicode():
298
321
            self._text = self._text.encode("ascii", "replace")
299
322
        textlist = [("normal", self._text)]
316
339
        self.update()
317
340
        return True             # Keep calling this
318
341
    
319
 
    def delete(self, **kwargs):
 
342
    def delete(self, *args, **kwargs):
320
343
        if self._update_timer_callback_tag is not None:
321
344
            gobject.source_remove(self._update_timer_callback_tag)
322
345
            self._update_timer_callback_tag = None
325
348
        self.match_objects = ()
326
349
        if self.delete_hook is not None:
327
350
            self.delete_hook(self)
328
 
        return super(MandosClientWidget, self).delete(**kwargs)
 
351
        return super(MandosClientWidget, self).delete(*args, **kwargs)
329
352
    
330
353
    def render(self, maxcolrow, focus=False):
331
354
        """Render differently if we have focus.
373
396
        else:
374
397
            return key
375
398
    
376
 
    def properties_changed(self, interface, properties, invalidated):
377
 
        """Call self.update() if any properties changed.
 
399
    def property_changed(self, property=None, value=None,
 
400
                         *args, **kwargs):
 
401
        """Call self.update() if old value is not new value.
378
402
        This overrides the method from MandosClientPropertyCache"""
379
 
        old_values = { key: self.properties.get(key)
380
 
                       for key in properties.keys() }
381
 
        super(MandosClientWidget, self).properties_changed(
382
 
            interface, properties, invalidated)
383
 
        if any(old_values[key] != self.properties.get(key)
384
 
               for key in old_values):
 
403
        property_name = unicode(property)
 
404
        old_value = self.properties.get(property_name)
 
405
        super(MandosClientWidget, self).property_changed(
 
406
            property=property, value=value, *args, **kwargs)
 
407
        if self.properties.get(property_name) != old_value:
385
408
            self.update()
386
409
 
387
410
 
390
413
    "down" key presses, thus not allowing any containing widgets to
391
414
    use them as an excuse to shift focus away from this widget.
392
415
    """
393
 
    def keypress(self, *args, **kwargs):
394
 
        ret = super(ConstrainedListBox, self).keypress(*args, **kwargs)
 
416
    def keypress(self, maxcolrow, key):
 
417
        ret = super(ConstrainedListBox, self).keypress(maxcolrow, key)
395
418
        if ret in ("up", "down"):
396
419
            return
397
420
        return ret
401
424
    """This is the entire user interface - the whole screen
402
425
    with boxes, lists of client widgets, etc.
403
426
    """
404
 
    def __init__(self, max_log_length=1000, log_level=1):
 
427
    def __init__(self, max_log_length=1000):
405
428
        DBusGMainLoop(set_as_default=True)
406
429
        
407
430
        self.screen = urwid.curses_display.Screen()
410
433
                ("normal",
411
434
                 "default", "default", None),
412
435
                ("bold",
413
 
                 "bold", "default", "bold"),
 
436
                 "default", "default", "bold"),
414
437
                ("underline-blink",
415
 
                 "underline,blink", "default", "underline,blink"),
 
438
                 "default", "default", "underline"),
416
439
                ("standout",
417
 
                 "standout", "default", "standout"),
 
440
                 "default", "default", "standout"),
418
441
                ("bold-underline-blink",
419
 
                 "bold,underline,blink", "default", "bold,underline,blink"),
 
442
                 "default", "default", ("bold", "underline")),
420
443
                ("bold-standout",
421
 
                 "bold,standout", "default", "bold,standout"),
 
444
                 "default", "default", ("bold", "standout")),
422
445
                ("underline-blink-standout",
423
 
                 "underline,blink,standout", "default",
424
 
                 "underline,blink,standout"),
 
446
                 "default", "default", ("underline", "standout")),
425
447
                ("bold-underline-blink-standout",
426
 
                 "bold,underline,blink,standout", "default",
427
 
                 "bold,underline,blink,standout"),
 
448
                 "default", "default", ("bold", "underline",
 
449
                                          "standout")),
428
450
                ))
429
451
        
430
452
        if urwid.supports_unicode():
445
467
        self.log = []
446
468
        self.max_log_length = max_log_length
447
469
        
448
 
        self.log_level = log_level
449
 
        
450
470
        # We keep a reference to the log widget so we can remove it
451
471
        # from the ListWalker without it getting destroyed
452
472
        self.logbox = ConstrainedListBox(self.log)
466
486
        self.main_loop = gobject.MainLoop()
467
487
    
468
488
    def client_not_found(self, fingerprint, address):
469
 
        self.log_message("Client with address {} and fingerprint {}"
470
 
                         " could not be found"
471
 
                         .format(address, fingerprint))
 
489
        self.log_message(("Client with address %s and fingerprint %s"
 
490
                          " could not be found" % (address,
 
491
                                                    fingerprint)))
472
492
    
473
493
    def rebuild(self):
474
494
        """This rebuilds the User Interface.
486
506
            self.uilist.append(self.logbox)
487
507
        self.topwidget = urwid.Pile(self.uilist)
488
508
    
489
 
    def log_message(self, message, level=1):
490
 
        """Log message formatted with timestamp"""
491
 
        if level < self.log_level:
492
 
            return
 
509
    def log_message(self, message):
493
510
        timestamp = datetime.datetime.now().isoformat()
494
 
        self.log_message_raw("{}: {}".format(timestamp, message),
495
 
                             level=level)
 
511
        self.log_message_raw(timestamp + ": " + message)
496
512
    
497
 
    def log_message_raw(self, markup, level=1):
 
513
    def log_message_raw(self, markup):
498
514
        """Add a log message to the log buffer."""
499
 
        if level < self.log_level:
500
 
            return
501
515
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
502
516
        if (self.max_log_length
503
517
            and len(self.log) > self.max_log_length):
510
524
        """Toggle visibility of the log buffer."""
511
525
        self.log_visible = not self.log_visible
512
526
        self.rebuild()
513
 
        self.log_message("Log visibility changed to: {}"
514
 
                         .format(self.log_visible), level=0)
 
527
        #self.log_message("Log visibility changed to: "
 
528
        #                 + unicode(self.log_visible))
515
529
    
516
530
    def change_log_display(self):
517
531
        """Change type of log display.
522
536
            self.log_wrap = "clip"
523
537
        for textwidget in self.log:
524
538
            textwidget.set_wrap_mode(self.log_wrap)
525
 
        self.log_message("Wrap mode: {}".format(self.log_wrap),
526
 
                         level=0)
 
539
        #self.log_message("Wrap mode: " + self.log_wrap)
527
540
    
528
541
    def find_and_remove_client(self, path, name):
529
542
        """Find a client by its object path and remove it.
534
547
            client = self.clients_dict[path]
535
548
        except KeyError:
536
549
            # not found?
537
 
            self.log_message("Unknown client {!r} ({!r}) removed"
538
 
                             .format(name, path))
 
550
            self.log_message("Unknown client %r (%r) removed", name,
 
551
                             path)
539
552
            return
540
553
        client.delete()
541
554
    
558
571
        if path is None:
559
572
            path = client.proxy.object_path
560
573
        self.clients_dict[path] = client
561
 
        self.clients.sort(key=lambda c: c.properties["Name"])
 
574
        self.clients.sort(None, lambda c: c.properties["Name"])
562
575
        self.refresh()
563
576
    
564
577
    def remove_client(self, client, path=None):
566
579
        if path is None:
567
580
            path = client.proxy.object_path
568
581
        del self.clients_dict[path]
 
582
        if not self.clients_dict:
 
583
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
 
584
            # is completely emptied, we need to recreate it.
 
585
            self.clients = urwid.SimpleListWalker([])
 
586
            self.rebuild()
569
587
        self.refresh()
570
588
    
571
589
    def refresh(self):
584
602
        try:
585
603
            mandos_clients = (self.mandos_serv
586
604
                              .GetAllClientsWithProperties())
587
 
            if not mandos_clients:
588
 
                self.log_message_raw(("bold", "Note: Server has no clients."))
589
605
        except dbus.exceptions.DBusException:
590
 
            self.log_message_raw(("bold", "Note: No Mandos server running."))
591
606
            mandos_clients = dbus.Dictionary()
592
607
        
593
608
        (self.mandos_serv
605
620
                            self.client_not_found,
606
621
                            dbus_interface=server_interface,
607
622
                            byte_arrays=True))
608
 
        for path, client in mandos_clients.items():
 
623
        for path, client in mandos_clients.iteritems():
609
624
            client_proxy_object = self.bus.get_object(self.busname,
610
625
                                                      path)
611
626
            self.add_client(MandosClientWidget(server_proxy_object
620
635
                                               logger
621
636
                                               =self.log_message),
622
637
                            path=path)
623
 
        
 
638
 
624
639
        self.refresh()
625
640
        self._input_callback_tag = (gobject.io_add_watch
626
641
                                    (sys.stdin.fileno(),
658
673
            elif key == "window resize":
659
674
                self.size = self.screen.get_cols_rows()
660
675
                self.refresh()
661
 
            elif key == "ctrl l":
662
 
                self.screen.clear()
 
676
            elif key == "\f":  # Ctrl-L
663
677
                self.refresh()
664
678
            elif key == "l" or key == "D":
665
679
                self.toggle_log_display()
677
691
                                            "?: Help",
678
692
                                            "l: Log window toggle",
679
693
                                            "TAB: Switch window",
680
 
                                            "w: Wrap (log lines)",
681
 
                                            "v: Toggle verbose log",
682
 
                                            ))))
 
694
                                            "w: Wrap (log)"))))
683
695
                self.log_message_raw(("bold",
684
696
                                      "  "
685
697
                                      .join(("Clients:",
698
710
                else:
699
711
                    self.topwidget.set_focus(self.logbox)
700
712
                self.refresh()
701
 
            elif key == "v":
702
 
                if self.log_level == 0:
703
 
                    self.log_level = 1
704
 
                    self.log_message("Verbose mode: Off")
705
 
                else:
706
 
                    self.log_level = 0
707
 
                    self.log_message("Verbose mode: On")
708
713
            #elif (key == "end" or key == "meta >" or key == "G"
709
714
            #      or key == ">"):
710
715
            #    pass            # xxx end-of-buffer
733
738
    ui.run()
734
739
except KeyboardInterrupt:
735
740
    ui.screen.stop()
736
 
except Exception as e:
737
 
    ui.log_message(str(e))
 
741
except Exception, e:
 
742
    ui.log_message(unicode(e))
738
743
    ui.screen.stop()
739
744
    raise