/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk

« back to all changes in this revision

Viewing changes to mandos-monitor

  • Committer: Teddy Hogeborn
  • Date: 2024-11-22 20:30:34 UTC
  • Revision ID: teddy@recompile.se-20241122203034-92q7483wxv29tqev
mandos-monitor: avoid deprecation warnings from urwid

The urwid.FlowWidget class is deprecated.  Replace it with inheriting
from urwid.Widget, and setting the appropriate class attribute.

* mandos-monitor: Replace any mentions of urwid.FlowWidget with
  urwid.Widget.
  (MandosClientWidget): Inherit from "urwid.Widget" instead of
  "urwid.FlowWidget".  Also, move MandosClientPropertyCache to first
  in inheritance list so that its __init__ method can absorb the
  "proxy_object" and "properties" keyword arguments.
  (MandosClientWidget._sizing): New class attribute; set to
  "frozenset(["flow"])".

(Thanks to an anonymous contributor for reporting this.)

Show diffs side-by-side

added added

removed removed

Lines of Context:
mandos-monitor
1
 
#!/usr/bin/python
 
1
#!/usr/bin/python3 -bbI
2
2
# -*- mode: python; coding: utf-8 -*-
3
 
# 
 
3
#
4
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
 
5
#
 
6
# Copyright © 2009-2019 Teddy Hogeborn
 
7
# Copyright © 2009-2019 Björn Påhlsson
 
8
#
 
9
# This file is part of Mandos.
 
10
#
 
11
# Mandos is free software: you can redistribute it and/or modify it
 
12
# under the terms of the GNU General Public License as published by
11
13
# the Free Software Foundation, either version 3 of the License, or
12
14
# (at your option) any later version.
13
15
#
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
#     Mandos is distributed in the hope that it will be useful, but
 
17
#     WITHOUT ANY WARRANTY; without even the implied warranty of
16
18
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17
19
#     GNU General Public License for more details.
18
 
# 
 
20
#
19
21
# 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
 
# 
 
22
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
 
23
#
 
24
# Contact the authors at <mandos@recompile.se>.
 
25
#
 
26
from __future__ import (division, absolute_import, print_function,
 
27
                        unicode_literals)
24
28
 
25
 
from __future__ import division, absolute_import, print_function, unicode_literals
 
29
try:
 
30
    from future_builtins import *
 
31
except ImportError:
 
32
    pass
26
33
 
27
34
import sys
 
35
import logging
28
36
import os
29
 
import signal
30
 
 
 
37
import warnings
31
38
import datetime
 
39
import locale
32
40
 
33
41
import urwid.curses_display
34
42
import urwid
35
43
 
36
44
from dbus.mainloop.glib import DBusGMainLoop
37
 
import gobject
 
45
from gi.repository import GLib
38
46
 
39
47
import dbus
40
48
 
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
if sys.version_info.major == 2:
 
50
    __metaclass__ = type
 
51
    str = unicode
 
52
    input = raw_input
 
53
 
 
54
# Show warnings by default
 
55
if not sys.warnoptions:
 
56
    warnings.simplefilter("default")
 
57
 
 
58
log = logging.getLogger(os.path.basename(sys.argv[0]))
 
59
logging.basicConfig(level="NOTSET", # Show all messages
 
60
                    format="%(message)s") # Show basic log messages
 
61
 
 
62
logging.captureWarnings(True)   # Show warnings via the logging system
 
63
 
 
64
locale.setlocale(locale.LC_ALL, "")
 
65
 
 
66
logging.getLogger("dbus.proxies").setLevel(logging.CRITICAL)
 
67
logging.getLogger("urwid").setLevel(logging.INFO)
49
68
 
50
69
# 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)
 
70
domain = "se.recompile"
 
71
server_interface = domain + ".Mandos"
 
72
client_interface = domain + ".Mandos.Client"
 
73
version = "1.8.17"
 
74
 
 
75
try:
 
76
    dbus.OBJECT_MANAGER_IFACE
 
77
except AttributeError:
 
78
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
79
 
63
80
 
64
81
def isoformat_to_datetime(iso):
65
82
    "Parse an ISO 8601 date string to a datetime.datetime()"
74
91
                             int(day),
75
92
                             int(hour),
76
93
                             int(minute),
77
 
                             int(second),           # Whole seconds
78
 
                             int(fraction*1000000)) # Microseconds
79
 
 
80
 
class MandosClientPropertyCache(object):
 
94
                             int(second),            # Whole seconds
 
95
                             int(fraction*1000000))  # Microseconds
 
96
 
 
97
 
 
98
class MandosClientPropertyCache:
81
99
    """This wraps a Mandos Client D-Bus proxy object, caches the
82
100
    properties and calls a hook function when any of them are
83
101
    changed.
84
102
    """
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.
 
103
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
104
        self.proxy = proxy_object  # Mandos Client proxy object
 
105
        self.properties = dict() if properties is None else properties
 
106
        self.property_changed_match = (
 
107
            self.proxy.connect_to_signal("PropertiesChanged",
 
108
                                         self.properties_changed,
 
109
                                         dbus.PROPERTIES_IFACE,
 
110
                                         byte_arrays=True))
 
111
 
 
112
        if properties is None:
 
113
            self.properties.update(self.proxy.GetAll(
 
114
                client_interface,
 
115
                dbus_interface=dbus.PROPERTIES_IFACE))
 
116
 
 
117
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
118
 
 
119
    def properties_changed(self, interface, properties, invalidated):
 
120
        """This is called whenever we get a PropertiesChanged signal
 
121
        It updates the changed properties in the "properties" dict.
105
122
        """
106
123
        # Update properties dict with new value
107
 
        self.properties[property] = value
108
 
 
109
 
 
110
 
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
 
124
        if interface == client_interface:
 
125
            self.properties.update(properties)
 
126
 
 
127
    def delete(self):
 
128
        self.property_changed_match.remove()
 
129
 
 
130
 
 
131
class MandosClientWidget(MandosClientPropertyCache, urwid.Widget):
111
132
    """A Mandos Client which is visible on the screen.
112
133
    """
113
 
    
 
134
 
 
135
    _sizing = frozenset(["flow"])
 
136
 
114
137
    def __init__(self, server_proxy_object=None, update_hook=None,
115
 
                 delete_hook=None, logger=None, *args, **kwargs):
 
138
                 delete_hook=None, **kwargs):
116
139
        # Called on update
117
140
        self.update_hook = update_hook
118
141
        # Called on delete
119
142
        self.delete_hook = delete_hook
120
143
        # Mandos Server proxy object
121
144
        self.server_proxy_object = server_proxy_object
122
 
        # Logger
123
 
        self.logger = logger
124
 
        
 
145
 
125
146
        self._update_timer_callback_tag = None
126
 
        self._update_timer_callback_lock = 0
127
 
        self.last_checker_failed = False
128
 
        
 
147
 
129
148
        # The widget shown normally
130
149
        self._text_widget = urwid.Text("")
131
150
        # The widget shown when we have focus
132
151
        self._focus_text_widget = urwid.Text("")
133
 
        super(MandosClientWidget, self).__init__(
134
 
            update_hook=update_hook, delete_hook=delete_hook,
135
 
            *args, **kwargs)
 
152
        super(MandosClientWidget, self).__init__(**kwargs)
136
153
        self.update()
137
154
        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
 
        
 
155
 
 
156
        self.match_objects = (
 
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
        log.debug("Created client %s", self.properties["Name"])
 
178
 
184
179
    def using_timer(self, flag):
185
180
        """Call this method with True or False when timer should be
186
181
        activated or deactivated.
187
182
        """
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)
 
183
        if flag and self._update_timer_callback_tag is None:
 
184
            # Will update the shown timer value every second
 
185
            self._update_timer_callback_tag = (
 
186
                GLib.timeout_add(1000,
 
187
                                 glib_safely(self.update_timer)))
 
188
        elif not (flag or self._update_timer_callback_tag is None):
 
189
            GLib.source_remove(self._update_timer_callback_tag)
199
190
            self._update_timer_callback_tag = None
200
 
    
 
191
 
201
192
    def checker_completed(self, exitstatus, condition, command):
202
193
        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))
 
194
            log.debug('Checker for client %s (command "%s")'
 
195
                      " succeeded", self.properties["Name"], command)
209
196
            self.update()
210
197
            return
211
198
        # Checker failed
212
 
        if not self.last_checker_failed:
213
 
            self.last_checker_failed = True
214
 
            self.using_timer(True)
215
199
        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)))
 
200
            log.info('Checker for client %s (command "%s") failed'
 
201
                     " with exit code %d", self.properties["Name"],
 
202
                     command, os.WEXITSTATUS(condition))
220
203
        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')
 
204
            log.info('Checker for client %s (command "%s") was'
 
205
                     " killed by signal %d", self.properties["Name"],
 
206
                     command, os.WTERMSIG(condition))
232
207
        self.update()
233
 
    
 
208
 
234
209
    def checker_started(self, command):
235
 
        #self.logger('Client %s started checker "%s"'
236
 
        #            % (self.properties["Name"], unicode(command)))
237
 
        pass
238
 
    
 
210
        """Server signals that a checker started."""
 
211
        log.debug('Client %s started checker "%s"',
 
212
                  self.properties["Name"], command)
 
213
 
239
214
    def got_secret(self):
240
 
        self.last_checker_failed = False
241
 
        self.logger('Client %s received its secret'
242
 
                    % self.properties["Name"])
243
 
    
 
215
        log.info("Client %s received its secret",
 
216
                 self.properties["Name"])
 
217
 
244
218
    def need_approval(self, timeout, default):
245
219
        if not default:
246
 
            message = 'Client %s needs approval within %s seconds'
 
220
            message = "Client %s needs approval within %f seconds"
247
221
        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
 
    
 
222
            message = "Client %s will get its secret in %f seconds"
 
223
        log.info(message, self.properties["Name"], timeout/1000)
 
224
 
253
225
    def rejected(self, reason):
254
 
        self.logger('Client %s was rejected; reason: %s'
255
 
                    % (self.properties["Name"], reason))
256
 
    
 
226
        log.info("Client %s was rejected; reason: %s",
 
227
                 self.properties["Name"], reason)
 
228
 
257
229
    def selectable(self):
258
230
        """Make this a "selectable" widget.
259
 
        This overrides the method from urwid.FlowWidget."""
 
231
        This overrides the method from urwid.Widget."""
260
232
        return True
261
 
    
 
233
 
262
234
    def rows(self, maxcolrow, focus=False):
263
235
        """How many rows this widget will occupy might depend on
264
236
        whether we have focus or not.
265
 
        This overrides the method from urwid.FlowWidget"""
 
237
        This overrides the method from urwid.Widget"""
266
238
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
267
 
    
 
239
 
268
240
    def current_widget(self, focus=False):
269
241
        if focus or self.opened:
270
242
            return self._focus_widget
271
243
        return self._widget
272
 
    
 
244
 
273
245
    def update(self):
274
246
        "Called when what is visible on the screen should be updated."
275
247
        # 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
 
                          }
 
248
        with_standout = {"normal": "standout",
 
249
                         "bold": "bold-standout",
 
250
                         "underline-blink":
 
251
                         "underline-blink-standout",
 
252
                         "bold-underline-blink":
 
253
                         "bold-underline-blink-standout",
 
254
                         }
283
255
 
284
256
        # Rebuild focus and non-focus widgets using current properties
285
257
 
286
258
        # Base part of a client. Name!
287
 
        base = ('%(name)s: '
288
 
                      % {"name": self.properties["Name"]})
 
259
        base = "{name}: ".format(name=self.properties["Name"])
289
260
        if not self.properties["Enabled"]:
290
261
            message = "DISABLED"
 
262
            self.using_timer(False)
291
263
        elif self.properties["ApprovalPending"]:
292
 
            timeout = datetime.timedelta(milliseconds
293
 
                                         = self.properties
294
 
                                         ["ApprovalDelay"])
 
264
            timeout = datetime.timedelta(
 
265
                milliseconds=self.properties["ApprovalDelay"])
295
266
            last_approval_request = isoformat_to_datetime(
296
267
                self.properties["LastApprovalRequest"])
297
268
            if last_approval_request is not None:
298
 
                timer = timeout - (datetime.datetime.utcnow()
299
 
                                   - last_approval_request)
 
269
                timer = max(timeout - (datetime.datetime.utcnow()
 
270
                                       - last_approval_request),
 
271
                            datetime.timedelta())
300
272
            else:
301
273
                timer = datetime.timedelta()
302
274
            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])
 
275
                message = "Approval in {}. (d)eny?"
 
276
            else:
 
277
                message = "Denial in {}. (a)pprove?"
 
278
            message = message.format(str(timer).rsplit(".", 1)[0])
 
279
            self.using_timer(True)
 
280
        elif self.properties["LastCheckerStatus"] != 0:
 
281
            # When checker has failed, show timer until client expires
 
282
            expires = self.properties["Expires"]
 
283
            if expires == "":
 
284
                timer = datetime.timedelta(0)
 
285
            else:
 
286
                expires = (datetime.datetime.strptime
 
287
                           (expires, "%Y-%m-%dT%H:%M:%S.%f"))
 
288
                timer = max(expires - datetime.datetime.utcnow(),
 
289
                            datetime.timedelta())
 
290
            message = ("A checker has failed! Time until client"
 
291
                       " gets disabled: {}"
 
292
                       .format(str(timer).rsplit(".", 1)[0]))
 
293
            self.using_timer(True)
319
294
        else:
320
295
            message = "enabled"
321
 
        self._text = "%s%s" % (base, message)
322
 
            
 
296
            self.using_timer(False)
 
297
        self._text = "{}{}".format(base, message)
 
298
 
323
299
        if not urwid.supports_unicode():
324
300
            self._text = self._text.encode("ascii", "replace")
325
301
        textlist = [("normal", self._text)]
335
311
        # Run update hook, if any
336
312
        if self.update_hook is not None:
337
313
            self.update_hook()
338
 
    
 
314
 
339
315
    def update_timer(self):
340
 
        "called by gobject"
 
316
        """called by GLib. Will indefinitely loop until
 
317
        GLib.source_remove() on tag is called
 
318
        """
341
319
        self.update()
342
320
        return True             # Keep calling this
343
 
    
344
 
    def delete(self):
 
321
 
 
322
    def delete(self, **kwargs):
345
323
        if self._update_timer_callback_tag is not None:
346
 
            gobject.source_remove(self._update_timer_callback_tag)
 
324
            GLib.source_remove(self._update_timer_callback_tag)
347
325
            self._update_timer_callback_tag = None
 
326
        for match in self.match_objects:
 
327
            match.remove()
 
328
        self.match_objects = ()
348
329
        if self.delete_hook is not None:
349
330
            self.delete_hook(self)
350
 
    
 
331
        return super(MandosClientWidget, self).delete(**kwargs)
 
332
 
351
333
    def render(self, maxcolrow, focus=False):
352
334
        """Render differently if we have focus.
353
 
        This overrides the method from urwid.FlowWidget"""
 
335
        This overrides the method from urwid.Widget"""
354
336
        return self.current_widget(focus).render(maxcolrow,
355
337
                                                 focus=focus)
356
 
    
 
338
 
357
339
    def keypress(self, maxcolrow, key):
358
340
        """Handle keys.
359
 
        This overrides the method from urwid.FlowWidget"""
 
341
        This overrides the method from urwid.Widget"""
360
342
        if key == "+":
361
 
            self.proxy.Enable(dbus_interface = client_interface)
 
343
            self.proxy.Set(client_interface, "Enabled",
 
344
                           dbus.Boolean(True), ignore_reply=True,
 
345
                           dbus_interface=dbus.PROPERTIES_IFACE)
362
346
        elif key == "-":
363
 
            self.proxy.Disable(dbus_interface = client_interface)
 
347
            self.proxy.Set(client_interface, "Enabled", False,
 
348
                           ignore_reply=True,
 
349
                           dbus_interface=dbus.PROPERTIES_IFACE)
364
350
        elif key == "a":
365
351
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
366
 
                               dbus_interface = client_interface)
 
352
                               dbus_interface=client_interface,
 
353
                               ignore_reply=True)
367
354
        elif key == "d":
368
355
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
369
 
                                  dbus_interface = client_interface)
 
356
                               dbus_interface=client_interface,
 
357
                               ignore_reply=True)
370
358
        elif key == "R" or key == "_" or key == "ctrl k":
371
359
            self.server_proxy_object.RemoveClient(self.proxy
372
 
                                                  .object_path)
 
360
                                                  .object_path,
 
361
                                                  ignore_reply=True)
373
362
        elif key == "s":
374
 
            self.proxy.StartChecker(dbus_interface = client_interface)
 
363
            self.proxy.Set(client_interface, "CheckerRunning",
 
364
                           dbus.Boolean(True), ignore_reply=True,
 
365
                           dbus_interface=dbus.PROPERTIES_IFACE)
375
366
        elif key == "S":
376
 
            self.proxy.StopChecker(dbus_interface = client_interface)
 
367
            self.proxy.Set(client_interface, "CheckerRunning",
 
368
                           dbus.Boolean(False), ignore_reply=True,
 
369
                           dbus_interface=dbus.PROPERTIES_IFACE)
377
370
        elif key == "C":
378
 
            self.proxy.CheckedOK(dbus_interface = client_interface)
 
371
            self.proxy.CheckedOK(dbus_interface=client_interface,
 
372
                                 ignore_reply=True)
379
373
        # xxx
380
374
#         elif key == "p" or key == "=":
381
375
#             self.proxy.pause()
385
379
#             self.open()
386
380
        else:
387
381
            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.
 
382
 
 
383
    def properties_changed(self, interface, properties, invalidated):
 
384
        """Call self.update() if any properties changed.
392
385
        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:
 
386
        old_values = {key: self.properties.get(key)
 
387
                      for key in properties.keys()}
 
388
        super(MandosClientWidget, self).properties_changed(
 
389
            interface, properties, invalidated)
 
390
        if any(old_values[key] != self.properties.get(key)
 
391
               for key in old_values):
398
392
            self.update()
399
393
 
400
394
 
 
395
def glib_safely(func, retval=True):
 
396
    def safe_func(*args, **kwargs):
 
397
        try:
 
398
            return func(*args, **kwargs)
 
399
        except Exception:
 
400
            log.exception("")
 
401
            return retval
 
402
    return safe_func
 
403
 
 
404
 
401
405
class ConstrainedListBox(urwid.ListBox):
402
406
    """Like a normal urwid.ListBox, but will consume all "up" or
403
407
    "down" key presses, thus not allowing any containing widgets to
404
408
    use them as an excuse to shift focus away from this widget.
405
409
    """
406
 
    def keypress(self, maxcolrow, key):
407
 
        ret = super(ConstrainedListBox, self).keypress(maxcolrow, key)
 
410
    def keypress(self, *args, **kwargs):
 
411
        ret = (super(ConstrainedListBox, self)
 
412
               .keypress(*args, **kwargs))
408
413
        if ret in ("up", "down"):
409
414
            return
410
415
        return ret
411
416
 
412
417
 
413
 
class UserInterface(object):
 
418
class UserInterface:
414
419
    """This is the entire user interface - the whole screen
415
420
    with boxes, lists of client widgets, etc.
416
421
    """
417
422
    def __init__(self, max_log_length=1000):
418
423
        DBusGMainLoop(set_as_default=True)
419
 
        
 
424
 
420
425
        self.screen = urwid.curses_display.Screen()
421
 
        
 
426
 
422
427
        self.screen.register_palette((
423
428
                ("normal",
424
429
                 "default", "default", None),
425
430
                ("bold",
426
 
                 "default", "default", "bold"),
 
431
                 "bold", "default", "bold"),
427
432
                ("underline-blink",
428
 
                 "default", "default", "underline"),
 
433
                 "underline,blink", "default", "underline,blink"),
429
434
                ("standout",
430
 
                 "default", "default", "standout"),
 
435
                 "standout", "default", "standout"),
431
436
                ("bold-underline-blink",
432
 
                 "default", "default", ("bold", "underline")),
 
437
                 "bold,underline,blink", "default",
 
438
                 "bold,underline,blink"),
433
439
                ("bold-standout",
434
 
                 "default", "default", ("bold", "standout")),
 
440
                 "bold,standout", "default", "bold,standout"),
435
441
                ("underline-blink-standout",
436
 
                 "default", "default", ("underline", "standout")),
 
442
                 "underline,blink,standout", "default",
 
443
                 "underline,blink,standout"),
437
444
                ("bold-underline-blink-standout",
438
 
                 "default", "default", ("bold", "underline",
439
 
                                          "standout")),
 
445
                 "bold,underline,blink,standout", "default",
 
446
                 "bold,underline,blink,standout"),
440
447
                ))
441
 
        
 
448
 
442
449
        if urwid.supports_unicode():
443
 
            self.divider = "─" # \u2500
444
 
            #self.divider = "━" # \u2501
 
450
            self.divider = "─"  # \u2500
445
451
        else:
446
 
            #self.divider = "-" # \u002d
447
 
            self.divider = "_" # \u005f
448
 
        
 
452
            self.divider = "_"  # \u005f
 
453
 
449
454
        self.screen.start()
450
 
        
 
455
 
451
456
        self.size = self.screen.get_cols_rows()
452
 
        
 
457
 
453
458
        self.clients = urwid.SimpleListWalker([])
454
459
        self.clients_dict = {}
455
 
        
 
460
 
456
461
        # We will add Text widgets to this list
457
 
        self.log = []
 
462
        self.log = urwid.SimpleListWalker([])
458
463
        self.max_log_length = max_log_length
459
 
        
 
464
 
460
465
        # We keep a reference to the log widget so we can remove it
461
466
        # from the ListWalker without it getting destroyed
462
467
        self.logbox = ConstrainedListBox(self.log)
463
 
        
 
468
 
464
469
        # This keeps track of whether self.uilist currently has
465
470
        # self.logbox in it or not
466
471
        self.log_visible = True
467
472
        self.log_wrap = "any"
468
 
        
 
473
 
 
474
        self.loghandler = UILogHandler(self)
 
475
 
469
476
        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
 
    
 
477
        self.add_log_line(("bold",
 
478
                           "Mandos Monitor version " + version))
 
479
        self.add_log_line(("bold", "q: Quit  ?: Help"))
 
480
 
 
481
        self.busname = domain + ".Mandos"
 
482
        self.main_loop = GLib.MainLoop()
 
483
 
 
484
    def client_not_found(self, key_id, address):
 
485
        log.info("Client with address %s and key ID %s could"
 
486
                 " not be found", address, key_id)
 
487
 
525
488
    def rebuild(self):
526
489
        """This rebuilds the User Interface.
527
490
        Call this when the widget layout needs to change"""
528
491
        self.uilist = []
529
 
        #self.uilist.append(urwid.ListBox(self.clients))
 
492
        # self.uilist.append(urwid.ListBox(self.clients))
530
493
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
531
494
                                                          clients),
532
 
                                       #header=urwid.Divider(),
 
495
                                       # header=urwid.Divider(),
533
496
                                       header=None,
534
 
                                       footer=
535
 
                                       urwid.Divider(div_char=
536
 
                                                     self.divider)))
 
497
                                       footer=urwid.Divider(
 
498
                                           div_char=self.divider)))
537
499
        if self.log_visible:
538
500
            self.uilist.append(self.logbox)
539
 
            pass
540
501
        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."""
 
502
 
 
503
    def add_log_line(self, markup):
548
504
        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),
 
505
        if self.max_log_length:
 
506
            if len(self.log) > self.max_log_length:
 
507
                del self.log[0:(len(self.log) - self.max_log_length)]
 
508
        self.logbox.set_focus(len(self.logbox.body.contents)-1,
553
509
                              coming_from="above")
554
510
        self.refresh()
555
 
    
 
511
 
556
512
    def toggle_log_display(self):
557
513
        """Toggle visibility of the log buffer."""
558
514
        self.log_visible = not self.log_visible
559
515
        self.rebuild()
560
 
        #self.log_message("Log visibility changed to: "
561
 
        #                 + unicode(self.log_visible))
562
 
    
 
516
        log.debug("Log visibility changed to: %s", self.log_visible)
 
517
 
563
518
    def change_log_display(self):
564
519
        """Change type of log display.
565
520
        Currently, this toggles wrapping of text lines."""
569
524
            self.log_wrap = "clip"
570
525
        for textwidget in self.log:
571
526
            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
 
527
        log.debug("Wrap mode: %s", self.log_wrap)
 
528
 
 
529
    def find_and_remove_client(self, path, interfaces):
 
530
        """Find a client by its object path and remove it.
 
531
 
 
532
        This is connected to the InterfacesRemoved signal from the
578
533
        Mandos server object."""
 
534
        if client_interface not in interfaces:
 
535
            # Not a Mandos client object; ignore
 
536
            return
579
537
        try:
580
538
            client = self.clients_dict[path]
581
539
        except KeyError:
582
540
            # not found?
583
 
            return
584
 
        self.remove_client(client, path)
585
 
    
586
 
    def add_new_client(self, path):
 
541
            log.warning("Unknown client %s removed", path)
 
542
            return
 
543
        client.delete()
 
544
 
 
545
    def add_new_client(self, path, ifs_and_props):
 
546
        """Find a client by its object path and remove it.
 
547
 
 
548
        This is connected to the InterfacesAdded signal from the
 
549
        Mandos server object.
 
550
        """
 
551
        if client_interface not in ifs_and_props:
 
552
            # Not a Mandos client object; ignore
 
553
            return
587
554
        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),
 
555
        self.add_client(MandosClientWidget(
 
556
            server_proxy_object=self.mandos_serv,
 
557
            proxy_object=client_proxy_object,
 
558
            update_hook=self.refresh,
 
559
            delete_hook=self.remove_client,
 
560
            properties=dict(ifs_and_props[client_interface])),
598
561
                        path=path)
599
 
    
 
562
 
600
563
    def add_client(self, client, path=None):
601
564
        self.clients.append(client)
602
565
        if path is None:
603
566
            path = client.proxy.object_path
604
567
        self.clients_dict[path] = client
605
 
        self.clients.sort(None, lambda c: c.properties["Name"])
 
568
        self.clients.sort(key=lambda c: c.properties["Name"])
606
569
        self.refresh()
607
 
    
 
570
 
608
571
    def remove_client(self, client, path=None):
609
572
        self.clients.remove(client)
610
573
        if path is None:
611
574
            path = client.proxy.object_path
612
575
        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
576
        self.refresh()
619
 
    
 
577
 
620
578
    def refresh(self):
621
579
        """Redraw the screen"""
622
580
        canvas = self.topwidget.render(self.size, focus=True)
623
581
        self.screen.draw_screen(self.size, canvas)
624
 
    
 
582
 
625
583
    def run(self):
626
584
        """Start the main loop and exit when it's done."""
 
585
        log.addHandler(self.loghandler)
 
586
        self.orig_log_propagate = log.propagate
 
587
        log.propagate = False
 
588
        self.orig_log_level = log.level
 
589
        log.setLevel("INFO")
 
590
        self.bus = dbus.SystemBus()
 
591
        mandos_dbus_objc = self.bus.get_object(
 
592
            self.busname, "/", follow_name_owner_changes=True)
 
593
        self.mandos_serv = dbus.Interface(
 
594
            mandos_dbus_objc, dbus_interface=server_interface)
 
595
        try:
 
596
            mandos_clients = (self.mandos_serv
 
597
                              .GetAllClientsWithProperties())
 
598
            if not mandos_clients:
 
599
                log.warning("Note: Server has no clients.")
 
600
        except dbus.exceptions.DBusException:
 
601
            log.warning("Note: No Mandos server running.")
 
602
            mandos_clients = dbus.Dictionary()
 
603
 
 
604
        (self.mandos_serv
 
605
         .connect_to_signal("InterfacesRemoved",
 
606
                            self.find_and_remove_client,
 
607
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
608
                            byte_arrays=True))
 
609
        (self.mandos_serv
 
610
         .connect_to_signal("InterfacesAdded",
 
611
                            self.add_new_client,
 
612
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
613
                            byte_arrays=True))
 
614
        (self.mandos_serv
 
615
         .connect_to_signal("ClientNotFound",
 
616
                            self.client_not_found,
 
617
                            dbus_interface=server_interface,
 
618
                            byte_arrays=True))
 
619
        for path, client in mandos_clients.items():
 
620
            client_proxy_object = self.bus.get_object(self.busname,
 
621
                                                      path)
 
622
            self.add_client(MandosClientWidget(
 
623
                server_proxy_object=self.mandos_serv,
 
624
                proxy_object=client_proxy_object,
 
625
                properties=client,
 
626
                update_hook=self.refresh,
 
627
                delete_hook=self.remove_client),
 
628
                            path=path)
 
629
 
627
630
        self.refresh()
628
 
        self._input_callback_tag = (gobject.io_add_watch
629
 
                                    (sys.stdin.fileno(),
630
 
                                     gobject.IO_IN,
631
 
                                     self.process_input))
 
631
        self._input_callback_tag = (
 
632
            GLib.io_add_watch(
 
633
                GLib.IOChannel.unix_new(sys.stdin.fileno()),
 
634
                GLib.PRIORITY_DEFAULT, GLib.IO_IN,
 
635
                glib_safely(self.process_input)))
632
636
        self.main_loop.run()
633
637
        # Main loop has finished, we should close everything now
634
 
        gobject.source_remove(self._input_callback_tag)
635
 
        self.screen.stop()
636
 
    
 
638
        GLib.source_remove(self._input_callback_tag)
 
639
        with warnings.catch_warnings():
 
640
            warnings.simplefilter("ignore", BytesWarning)
 
641
            self.screen.stop()
 
642
 
637
643
    def stop(self):
638
644
        self.main_loop.quit()
639
 
    
 
645
        log.removeHandler(self.loghandler)
 
646
        log.propagate = self.orig_log_propagate
 
647
 
640
648
    def process_input(self, source, condition):
641
649
        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
 
                         }
 
650
        translations = {"ctrl n": "down",       # Emacs
 
651
                        "ctrl p": "up",         # Emacs
 
652
                        "ctrl v": "page down",  # Emacs
 
653
                        "meta v": "page up",    # Emacs
 
654
                        " ": "page down",       # less
 
655
                        "f": "page down",       # less
 
656
                        "b": "page up",         # less
 
657
                        "j": "down",            # vi
 
658
                        "k": "up",              # vi
 
659
                        }
652
660
        for key in keys:
653
661
            try:
654
662
                key = translations[key]
655
663
            except KeyError:    # :-)
656
664
                pass
657
 
            
 
665
 
658
666
            if key == "q" or key == "Q":
659
667
                self.stop()
660
668
                break
661
669
            elif key == "window resize":
662
670
                self.size = self.screen.get_cols_rows()
663
671
                self.refresh()
664
 
            elif key == "\f":  # Ctrl-L
 
672
            elif key == "ctrl l":
 
673
                self.screen.clear()
665
674
                self.refresh()
666
675
            elif key == "l" or key == "D":
667
676
                self.toggle_log_display()
673
682
                if not self.log_visible:
674
683
                    self.log_visible = True
675
684
                    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"))))
 
685
                self.add_log_line(("bold",
 
686
                                   "  ".join(("q: Quit",
 
687
                                              "?: Help",
 
688
                                              "l: Log window toggle",
 
689
                                              "TAB: Switch window",
 
690
                                              "w: Wrap (log lines)",
 
691
                                              "v: Toggle verbose log",
 
692
                                   ))))
 
693
                self.add_log_line(("bold",
 
694
                                   "  ".join(("Clients:",
 
695
                                              "+: Enable",
 
696
                                              "-: Disable",
 
697
                                              "R: Remove",
 
698
                                              "s: Start new checker",
 
699
                                              "S: Stop checker",
 
700
                                              "C: Checker OK",
 
701
                                              "a: Approve",
 
702
                                              "d: Deny",
 
703
                                   ))))
694
704
                self.refresh()
695
705
            elif key == "tab":
696
706
                if self.topwidget.get_focus() is self.logbox:
698
708
                else:
699
709
                    self.topwidget.set_focus(self.logbox)
700
710
                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
 
711
            elif key == "v":
 
712
                if log.level < logging.INFO:
 
713
                    log.setLevel(logging.INFO)
 
714
                    log.info("Verbose mode: Off")
 
715
                else:
 
716
                    log.setLevel(logging.NOTSET)
 
717
                    log.info("Verbose mode: On")
 
718
            # elif (key == "end" or key == "meta >" or key == "G"
 
719
            #       or key == ">"):
 
720
            #     pass            # xxx end-of-buffer
 
721
            # elif (key == "home" or key == "meta <" or key == "g"
 
722
            #       or key == "<"):
 
723
            #     pass            # xxx beginning-of-buffer
 
724
            # elif key == "ctrl e" or key == "$":
 
725
            #     pass            # xxx move-end-of-line
 
726
            # elif key == "ctrl a" or key == "^":
 
727
            #     pass            # xxx move-beginning-of-line
 
728
            # elif key == "ctrl b" or key == "meta (" or key == "h":
 
729
            #     pass            # xxx left
 
730
            # elif key == "ctrl f" or key == "meta )" or key == "l":
 
731
            #     pass            # xxx right
 
732
            # elif key == "a":
 
733
            #     pass            # scroll up log
 
734
            # elif key == "z":
 
735
            #     pass            # scroll down log
719
736
            elif self.topwidget.selectable():
720
737
                self.topwidget.keypress(self.size, key)
721
738
                self.refresh()
722
739
        return True
723
740
 
 
741
 
 
742
class UILogHandler(logging.Handler):
 
743
    def __init__(self, ui, *args, **kwargs):
 
744
        self.ui = ui
 
745
        super(UILogHandler, self).__init__(*args, **kwargs)
 
746
        self.setFormatter(
 
747
            logging.Formatter("%(asctime)s: %(message)s"))
 
748
    def emit(self, record):
 
749
        msg = self.format(record)
 
750
        if record.levelno > logging.INFO:
 
751
            msg = ("bold", msg)
 
752
        self.ui.add_log_line(msg)
 
753
 
 
754
 
724
755
ui = UserInterface()
725
756
try:
726
757
    ui.run()
727
758
except KeyboardInterrupt:
728
 
    ui.screen.stop()
729
 
except Exception, e:
730
 
    ui.log_message(unicode(e))
731
 
    ui.screen.stop()
 
759
    with warnings.catch_warnings():
 
760
        warnings.filterwarnings("ignore", "", BytesWarning)
 
761
        ui.screen.stop()
 
762
except Exception:
 
763
    with warnings.catch_warnings():
 
764
        warnings.filterwarnings("ignore", "", BytesWarning)
 
765
        ui.screen.stop()
732
766
    raise