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- Committer: Teddy Hogeborn
- Date: 2009-01-10 06:00:50 UTC
- Revision ID: teddy@fukt.bsnet.se-20090110060050-6v5y342fit0233pg
* plugins.d/askpass-fifo.c: Fix name in header.
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/splashy.c: - '' -
* plugins.d/usplash.c: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/splashy.c: - '' -
* plugins.d/usplash.c: - '' -
- files removed:
- DBUS-API
- debian/source
- files renamed:
- mandos-ctl => mandos-list
- files modified:
- .bzrignore
added
removed
mandos-monitor
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos Monitor - Control and monitor the Mandos server
5
#
6
# Copyright © 2009,2010 Teddy Hogeborn
7
# Copyright © 2009,2010 Björn Påhlsson
8
#
9
# This program is free software: you can redistribute it and/or modify
10
# it under the terms of the GNU General Public License as published by
11
# the Free Software Foundation, either version 3 of the License, or
12
# (at your option) any later version.
13
#
14
# This program is distributed in the hope that it will be useful,
15
# but WITHOUT ANY WARRANTY; without even the implied warranty of
16
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17
# GNU General Public License for more details.
18
#
19
# You should have received a copy of the GNU General Public License
20
# along with this program. If not, see <http://www.gnu.org/licenses/>.
21
#
22
# Contact the authors at <mandos@fukt.bsnet.se>.
23
#
24
25
from __future__ import division, absolute_import, print_function, unicode_literals
26
27
import sys
28
import os
29
import signal
30
31
import datetime
32
33
import urwid.curses_display
34
import urwid
35
36
from dbus.mainloop.glib import DBusGMainLoop
37
import gobject
38
39
import dbus
40
41
import UserList
42
43
import locale
44
45
locale.setlocale(locale.LC_ALL, '')
46
47
import logging
48
logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
49
50
# Some useful constants
51
domain = 'se.bsnet.fukt'
52
server_interface = domain + '.Mandos'
53
client_interface = domain + '.Mandos.Client'
54
version = "1.2.3"
55
56
# Always run in monochrome mode
57
urwid.curses_display.curses.has_colors = lambda : False
58
59
# Urwid doesn't support blinking, but we want it. Since we have no
60
# use for underline on its own, we make underline also always blink.
61
urwid.curses_display.curses.A_UNDERLINE |= (
62
urwid.curses_display.curses.A_BLINK)
63
64
def isoformat_to_datetime(iso):
65
"Parse an ISO 8601 date string to a datetime.datetime()"
66
if not iso:
67
return None
68
d, t = iso.split("T", 1)
69
year, month, day = d.split("-", 2)
70
hour, minute, second = t.split(":", 2)
71
second, fraction = divmod(float(second), 1)
72
return datetime.datetime(int(year),
73
int(month),
74
int(day),
75
int(hour),
76
int(minute),
77
int(second), # Whole seconds
78
int(fraction*1000000)) # Microseconds
79
80
class MandosClientPropertyCache(object):
81
"""This wraps a Mandos Client D-Bus proxy object, caches the
82
properties and calls a hook function when any of them are
83
changed.
84
"""
85
def __init__(self, proxy_object=None, *args, **kwargs):
86
self.proxy = proxy_object # Mandos Client proxy object
87
88
self.properties = dict()
89
self.proxy.connect_to_signal("PropertyChanged",
90
self.property_changed,
91
client_interface,
92
byte_arrays=True)
93
94
self.properties.update(
95
self.proxy.GetAll(client_interface,
96
dbus_interface = dbus.PROPERTIES_IFACE))
97
98
#XXX This break good super behaviour!
99
# super(MandosClientPropertyCache, self).__init__(
100
# *args, **kwargs)
101
102
def property_changed(self, property=None, value=None):
103
"""This is called whenever we get a PropertyChanged signal
104
It updates the changed property in the "properties" dict.
105
"""
106
# Update properties dict with new value
107
self.properties[property] = value
108
109
110
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
111
"""A Mandos Client which is visible on the screen.
112
"""
113
114
def __init__(self, server_proxy_object=None, update_hook=None,
115
delete_hook=None, logger=None, *args, **kwargs):
116
# Called on update
117
self.update_hook = update_hook
118
# Called on delete
119
self.delete_hook = delete_hook
120
# Mandos Server proxy object
121
self.server_proxy_object = server_proxy_object
122
# Logger
123
self.logger = logger
124
125
self._update_timer_callback_tag = None
126
self._update_timer_callback_lock = 0
127
self.last_checker_failed = False
128
129
# The widget shown normally
130
self._text_widget = urwid.Text("")
131
# The widget shown when we have focus
132
self._focus_text_widget = urwid.Text("")
133
super(MandosClientWidget, self).__init__(
134
update_hook=update_hook, delete_hook=delete_hook,
135
*args, **kwargs)
136
self.update()
137
self.opened = False
138
139
last_checked_ok = isoformat_to_datetime(self.properties
140
["LastCheckedOK"])
141
if last_checked_ok is None:
142
self.last_checker_failed = True
143
else:
144
self.last_checker_failed = ((datetime.datetime.utcnow()
145
- last_checked_ok)
146
> datetime.timedelta
147
(milliseconds=
148
self.properties
149
["Interval"]))
150
151
if self.last_checker_failed:
152
self.using_timer(True)
153
154
if self.need_approval:
155
self.using_timer(True)
156
157
self.proxy.connect_to_signal("CheckerCompleted",
158
self.checker_completed,
159
client_interface,
160
byte_arrays=True)
161
self.proxy.connect_to_signal("CheckerStarted",
162
self.checker_started,
163
client_interface,
164
byte_arrays=True)
165
self.proxy.connect_to_signal("GotSecret",
166
self.got_secret,
167
client_interface,
168
byte_arrays=True)
169
self.proxy.connect_to_signal("NeedApproval",
170
self.need_approval,
171
client_interface,
172
byte_arrays=True)
173
self.proxy.connect_to_signal("Rejected",
174
self.rejected,
175
client_interface,
176
byte_arrays=True)
177
178
def property_changed(self, property=None, value=None):
179
super(self, MandosClientWidget).property_changed(property,
180
value)
181
if property == "ApprovalPending":
182
using_timer(bool(value))
183
184
def using_timer(self, flag):
185
"""Call this method with True or False when timer should be
186
activated or deactivated.
187
"""
188
old = self._update_timer_callback_lock
189
if flag:
190
self._update_timer_callback_lock += 1
191
else:
192
self._update_timer_callback_lock -= 1
193
if old == 0 and self._update_timer_callback_lock:
194
self._update_timer_callback_tag = (gobject.timeout_add
195
(1000,
196
self.update_timer))
197
elif old and self._update_timer_callback_lock == 0:
198
gobject.source_remove(self._update_timer_callback_tag)
199
self._update_timer_callback_tag = None
200
201
def checker_completed(self, exitstatus, condition, command):
202
if exitstatus == 0:
203
if self.last_checker_failed:
204
self.last_checker_failed = False
205
self.using_timer(False)
206
#self.logger('Checker for client %s (command "%s")'
207
# ' was successful'
208
# % (self.properties["Name"], command))
209
self.update()
210
return
211
# Checker failed
212
if not self.last_checker_failed:
213
self.last_checker_failed = True
214
self.using_timer(True)
215
if os.WIFEXITED(condition):
216
self.logger('Checker for client %s (command "%s")'
217
' failed with exit code %s'
218
% (self.properties["Name"], command,
219
os.WEXITSTATUS(condition)))
220
elif os.WIFSIGNALED(condition):
221
self.logger('Checker for client %s (command "%s")'
222
' was killed by signal %s'
223
% (self.properties["Name"], command,
224
os.WTERMSIG(condition)))
225
elif os.WCOREDUMP(condition):
226
self.logger('Checker for client %s (command "%s")'
227
' dumped core'
228
% (self.properties["Name"], command))
229
else:
230
self.logger('Checker for client %s completed'
231
' mysteriously')
232
self.update()
233
234
def checker_started(self, command):
235
#self.logger('Client %s started checker "%s"'
236
# % (self.properties["Name"], unicode(command)))
237
pass
238
239
def got_secret(self):
240
self.last_checker_failed = False
241
self.logger('Client %s received its secret'
242
% self.properties["Name"])
243
244
def need_approval(self, timeout, default):
245
if not default:
246
message = 'Client %s needs approval within %s seconds'
247
else:
248
message = 'Client %s will get its secret in %s seconds'
249
self.logger(message
250
% (self.properties["Name"], timeout/1000))
251
self.using_timer(True)
252
253
def rejected(self, reason):
254
self.logger('Client %s was rejected; reason: %s'
255
% (self.properties["Name"], reason))
256
257
def selectable(self):
258
"""Make this a "selectable" widget.
259
This overrides the method from urwid.FlowWidget."""
260
return True
261
262
def rows(self, maxcolrow, focus=False):
263
"""How many rows this widget will occupy might depend on
264
whether we have focus or not.
265
This overrides the method from urwid.FlowWidget"""
266
return self.current_widget(focus).rows(maxcolrow, focus=focus)
267
268
def current_widget(self, focus=False):
269
if focus or self.opened:
270
return self._focus_widget
271
return self._widget
272
273
def update(self):
274
"Called when what is visible on the screen should be updated."
275
# How to add standout mode to a style
276
with_standout = { "normal": "standout",
277
"bold": "bold-standout",
278
"underline-blink":
279
"underline-blink-standout",
280
"bold-underline-blink":
281
"bold-underline-blink-standout",
282
}
283
284
# Rebuild focus and non-focus widgets using current properties
285
286
# Base part of a client. Name!
287
base = ('%(name)s: '
288
% {"name": self.properties["Name"]})
289
if not self.properties["Enabled"]:
290
message = "DISABLED"
291
elif self.properties["ApprovalPending"]:
292
timeout = datetime.timedelta(milliseconds
293
= self.properties
294
["ApprovalDelay"])
295
last_approval_request = isoformat_to_datetime(
296
self.properties["LastApprovalRequest"])
297
if last_approval_request is not None:
298
timer = timeout - (datetime.datetime.utcnow()
299
- last_approval_request)
300
else:
301
timer = datetime.timedelta()
302
if self.properties["ApprovedByDefault"]:
303
message = "Approval in %s. (d)eny?"
304
else:
305
message = "Denial in %s. (a)pprove?"
306
message = message % unicode(timer).rsplit(".", 1)[0]
307
elif self.last_checker_failed:
308
timeout = datetime.timedelta(milliseconds
309
= self.properties
310
["Timeout"])
311
last_ok = isoformat_to_datetime(
312
max((self.properties["LastCheckedOK"]
313
or self.properties["Created"]),
314
self.properties["LastEnabled"]))
315
timer = timeout - (datetime.datetime.utcnow() - last_ok)
316
message = ('A checker has failed! Time until client'
317
' gets disabled: %s'
318
% unicode(timer).rsplit(".", 1)[0])
319
else:
320
message = "enabled"
321
self._text = "%s%s" % (base, message)
322
323
if not urwid.supports_unicode():
324
self._text = self._text.encode("ascii", "replace")
325
textlist = [("normal", self._text)]
326
self._text_widget.set_text(textlist)
327
self._focus_text_widget.set_text([(with_standout[text[0]],
328
text[1])
329
if isinstance(text, tuple)
330
else text
331
for text in textlist])
332
self._widget = self._text_widget
333
self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
334
"standout")
335
# Run update hook, if any
336
if self.update_hook is not None:
337
self.update_hook()
338
339
def update_timer(self):
340
"called by gobject"
341
self.update()
342
return True # Keep calling this
343
344
def delete(self):
345
if self._update_timer_callback_tag is not None:
346
gobject.source_remove(self._update_timer_callback_tag)
347
self._update_timer_callback_tag = None
348
if self.delete_hook is not None:
349
self.delete_hook(self)
350
351
def render(self, maxcolrow, focus=False):
352
"""Render differently if we have focus.
353
This overrides the method from urwid.FlowWidget"""
354
return self.current_widget(focus).render(maxcolrow,
355
focus=focus)
356
357
def keypress(self, maxcolrow, key):
358
"""Handle keys.
359
This overrides the method from urwid.FlowWidget"""
360
if key == "+":
361
self.proxy.Enable(dbus_interface = client_interface)
362
elif key == "-":
363
self.proxy.Disable(dbus_interface = client_interface)
364
elif key == "a":
365
self.proxy.Approve(dbus.Boolean(True, variant_level=1),
366
dbus_interface = client_interface)
367
elif key == "d":
368
self.proxy.Approve(dbus.Boolean(False, variant_level=1),
369
dbus_interface = client_interface)
370
elif key == "R" or key == "_" or key == "ctrl k":
371
self.server_proxy_object.RemoveClient(self.proxy
372
.object_path)
373
elif key == "s":
374
self.proxy.StartChecker(dbus_interface = client_interface)
375
elif key == "S":
376
self.proxy.StopChecker(dbus_interface = client_interface)
377
elif key == "C":
378
self.proxy.CheckedOK(dbus_interface = client_interface)
379
# xxx
380
# elif key == "p" or key == "=":
381
# self.proxy.pause()
382
# elif key == "u" or key == ":":
383
# self.proxy.unpause()
384
# elif key == "RET":
385
# self.open()
386
else:
387
return key
388
389
def property_changed(self, property=None, value=None,
390
*args, **kwargs):
391
"""Call self.update() if old value is not new value.
392
This overrides the method from MandosClientPropertyCache"""
393
property_name = unicode(property)
394
old_value = self.properties.get(property_name)
395
super(MandosClientWidget, self).property_changed(
396
property=property, value=value, *args, **kwargs)
397
if self.properties.get(property_name) != old_value:
398
self.update()
399
400
401
class ConstrainedListBox(urwid.ListBox):
402
"""Like a normal urwid.ListBox, but will consume all "up" or
403
"down" key presses, thus not allowing any containing widgets to
404
use them as an excuse to shift focus away from this widget.
405
"""
406
def keypress(self, maxcolrow, key):
407
ret = super(ConstrainedListBox, self).keypress(maxcolrow, key)
408
if ret in ("up", "down"):
409
return
410
return ret
411
412
413
class UserInterface(object):
414
"""This is the entire user interface - the whole screen
415
with boxes, lists of client widgets, etc.
416
"""
417
def __init__(self, max_log_length=1000):
418
DBusGMainLoop(set_as_default=True)
419
420
self.screen = urwid.curses_display.Screen()
421
422
self.screen.register_palette((
423
("normal",
424
"default", "default", None),
425
("bold",
426
"default", "default", "bold"),
427
("underline-blink",
428
"default", "default", "underline"),
429
("standout",
430
"default", "default", "standout"),
431
("bold-underline-blink",
432
"default", "default", ("bold", "underline")),
433
("bold-standout",
434
"default", "default", ("bold", "standout")),
435
("underline-blink-standout",
436
"default", "default", ("underline", "standout")),
437
("bold-underline-blink-standout",
438
"default", "default", ("bold", "underline",
439
"standout")),
440
))
441
442
if urwid.supports_unicode():
443
self.divider = "─" # \u2500
444
#self.divider = "━" # \u2501
445
else:
446
#self.divider = "-" # \u002d
447
self.divider = "_" # \u005f
448
449
self.screen.start()
450
451
self.size = self.screen.get_cols_rows()
452
453
self.clients = urwid.SimpleListWalker([])
454
self.clients_dict = {}
455
456
# We will add Text widgets to this list
457
self.log = []
458
self.max_log_length = max_log_length
459
460
# We keep a reference to the log widget so we can remove it
461
# from the ListWalker without it getting destroyed
462
self.logbox = ConstrainedListBox(self.log)
463
464
# This keeps track of whether self.uilist currently has
465
# self.logbox in it or not
466
self.log_visible = True
467
self.log_wrap = "any"
468
469
self.rebuild()
470
self.log_message_raw(("bold",
471
"Mandos Monitor version " + version))
472
self.log_message_raw(("bold",
473
"q: Quit ?: Help"))
474
475
self.busname = domain + '.Mandos'
476
self.main_loop = gobject.MainLoop()
477
self.bus = dbus.SystemBus()
478
mandos_dbus_objc = self.bus.get_object(
479
self.busname, "/", follow_name_owner_changes=True)
480
self.mandos_serv = dbus.Interface(mandos_dbus_objc,
481
dbus_interface
482
= server_interface)
483
try:
484
mandos_clients = (self.mandos_serv
485
.GetAllClientsWithProperties())
486
except dbus.exceptions.DBusException:
487
mandos_clients = dbus.Dictionary()
488
489
(self.mandos_serv
490
.connect_to_signal("ClientRemoved",
491
self.find_and_remove_client,
492
dbus_interface=server_interface,
493
byte_arrays=True))
494
(self.mandos_serv
495
.connect_to_signal("ClientAdded",
496
self.add_new_client,
497
dbus_interface=server_interface,
498
byte_arrays=True))
499
(self.mandos_serv
500
.connect_to_signal("ClientNotFound",
501
self.client_not_found,
502
dbus_interface=server_interface,
503
byte_arrays=True))
504
for path, client in mandos_clients.iteritems():
505
client_proxy_object = self.bus.get_object(self.busname,
506
path)
507
self.add_client(MandosClientWidget(server_proxy_object
508
=self.mandos_serv,
509
proxy_object
510
=client_proxy_object,
511
properties=client,
512
update_hook
513
=self.refresh,
514
delete_hook
515
=self.remove_client,
516
logger
517
=self.log_message),
518
path=path)
519
520
def client_not_found(self, fingerprint, address):
521
self.log_message(("Client with address %s and fingerprint %s"
522
" could not be found" % (address,
523
fingerprint)))
524
525
def rebuild(self):
526
"""This rebuilds the User Interface.
527
Call this when the widget layout needs to change"""
528
self.uilist = []
529
#self.uilist.append(urwid.ListBox(self.clients))
530
self.uilist.append(urwid.Frame(ConstrainedListBox(self.
531
clients),
532
#header=urwid.Divider(),
533
header=None,
534
footer=
535
urwid.Divider(div_char=
536
self.divider)))
537
if self.log_visible:
538
self.uilist.append(self.logbox)
539
pass
540
self.topwidget = urwid.Pile(self.uilist)
541
542
def log_message(self, message):
543
timestamp = datetime.datetime.now().isoformat()
544
self.log_message_raw(timestamp + ": " + message)
545
546
def log_message_raw(self, markup):
547
"""Add a log message to the log buffer."""
548
self.log.append(urwid.Text(markup, wrap=self.log_wrap))
549
if (self.max_log_length
550
and len(self.log) > self.max_log_length):
551
del self.log[0:len(self.log)-self.max_log_length-1]
552
self.logbox.set_focus(len(self.logbox.body.contents),
553
coming_from="above")
554
self.refresh()
555
556
def toggle_log_display(self):
557
"""Toggle visibility of the log buffer."""
558
self.log_visible = not self.log_visible
559
self.rebuild()
560
#self.log_message("Log visibility changed to: "
561
# + unicode(self.log_visible))
562
563
def change_log_display(self):
564
"""Change type of log display.
565
Currently, this toggles wrapping of text lines."""
566
if self.log_wrap == "clip":
567
self.log_wrap = "any"
568
else:
569
self.log_wrap = "clip"
570
for textwidget in self.log:
571
textwidget.set_wrap_mode(self.log_wrap)
572
#self.log_message("Wrap mode: " + self.log_wrap)
573
574
def find_and_remove_client(self, path, name):
575
"""Find an client from its object path and remove it.
576
577
This is connected to the ClientRemoved signal from the
578
Mandos server object."""
579
try:
580
client = self.clients_dict[path]
581
except KeyError:
582
# not found?
583
return
584
self.remove_client(client, path)
585
586
def add_new_client(self, path):
587
client_proxy_object = self.bus.get_object(self.busname, path)
588
self.add_client(MandosClientWidget(server_proxy_object
589
=self.mandos_serv,
590
proxy_object
591
=client_proxy_object,
592
update_hook
593
=self.refresh,
594
delete_hook
595
=self.remove_client,
596
logger
597
=self.log_message),
598
path=path)
599
600
def add_client(self, client, path=None):
601
self.clients.append(client)
602
if path is None:
603
path = client.proxy.object_path
604
self.clients_dict[path] = client
605
self.clients.sort(None, lambda c: c.properties["Name"])
606
self.refresh()
607
608
def remove_client(self, client, path=None):
609
self.clients.remove(client)
610
if path is None:
611
path = client.proxy.object_path
612
del self.clients_dict[path]
613
if not self.clients_dict:
614
# Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
615
# is completely emptied, we need to recreate it.
616
self.clients = urwid.SimpleListWalker([])
617
self.rebuild()
618
self.refresh()
619
620
def refresh(self):
621
"""Redraw the screen"""
622
canvas = self.topwidget.render(self.size, focus=True)
623
self.screen.draw_screen(self.size, canvas)
624
625
def run(self):
626
"""Start the main loop and exit when it's done."""
627
self.refresh()
628
self._input_callback_tag = (gobject.io_add_watch
629
(sys.stdin.fileno(),
630
gobject.IO_IN,
631
self.process_input))
632
self.main_loop.run()
633
# Main loop has finished, we should close everything now
634
gobject.source_remove(self._input_callback_tag)
635
self.screen.stop()
636
637
def stop(self):
638
self.main_loop.quit()
639
640
def process_input(self, source, condition):
641
keys = self.screen.get_input()
642
translations = { "ctrl n": "down", # Emacs
643
"ctrl p": "up", # Emacs
644
"ctrl v": "page down", # Emacs
645
"meta v": "page up", # Emacs
646
" ": "page down", # less
647
"f": "page down", # less
648
"b": "page up", # less
649
"j": "down", # vi
650
"k": "up", # vi
651
}
652
for key in keys:
653
try:
654
key = translations[key]
655
except KeyError: # :-)
656
pass
657
658
if key == "q" or key == "Q":
659
self.stop()
660
break
661
elif key == "window resize":
662
self.size = self.screen.get_cols_rows()
663
self.refresh()
664
elif key == "\f": # Ctrl-L
665
self.refresh()
666
elif key == "l" or key == "D":
667
self.toggle_log_display()
668
self.refresh()
669
elif key == "w" or key == "i":
670
self.change_log_display()
671
self.refresh()
672
elif key == "?" or key == "f1" or key == "esc":
673
if not self.log_visible:
674
self.log_visible = True
675
self.rebuild()
676
self.log_message_raw(("bold",
677
" ".
678
join(("q: Quit",
679
"?: Help",
680
"l: Log window toggle",
681
"TAB: Switch window",
682
"w: Wrap (log)"))))
683
self.log_message_raw(("bold",
684
" "
685
.join(("Clients:",
686
"+: Enable",
687
"-: Disable",
688
"R: Remove",
689
"s: Start new checker",
690
"S: Stop checker",
691
"C: Checker OK",
692
"a: Approve",
693
"d: Deny"))))
694
self.refresh()
695
elif key == "tab":
696
if self.topwidget.get_focus() is self.logbox:
697
self.topwidget.set_focus(0)
698
else:
699
self.topwidget.set_focus(self.logbox)
700
self.refresh()
701
#elif (key == "end" or key == "meta >" or key == "G"
702
# or key == ">"):
703
# pass # xxx end-of-buffer
704
#elif (key == "home" or key == "meta <" or key == "g"
705
# or key == "<"):
706
# pass # xxx beginning-of-buffer
707
#elif key == "ctrl e" or key == "$":
708
# pass # xxx move-end-of-line
709
#elif key == "ctrl a" or key == "^":
710
# pass # xxx move-beginning-of-line
711
#elif key == "ctrl b" or key == "meta (" or key == "h":
712
# pass # xxx left
713
#elif key == "ctrl f" or key == "meta )" or key == "l":
714
# pass # xxx right
715
#elif key == "a":
716
# pass # scroll up log
717
#elif key == "z":
718
# pass # scroll down log
719
elif self.topwidget.selectable():
720
self.topwidget.keypress(self.size, key)
721
self.refresh()
722
return True
723
724
ui = UserInterface()
725
try:
726
ui.run()
727
except KeyboardInterrupt:
728
ui.screen.stop()
729
except Exception, e:
730
ui.log_message(unicode(e))
731
ui.screen.stop()
732
raise
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0