/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2024-09-09 04:24:39 UTC
  • Revision ID: teddy@recompile.se-20240909042439-j85mr20uli2hnyis
Eliminate compiler warnings

Many programs use nested functions, which now result in a linker
warning about executable stack.  Hide this warning.  Also, rewrite a
loop in the plymouth plugin to avoid warning about signed overflow.
This change also makes the plugin pick the alphabetically first
process entry instead of the last, in case many plymouth processes are
found (which should be unlikely).

* Makefile (plugin-runner, dracut-module/password-agent,
  plugins.d/password-prompt, plugins.d/mandos-client,
  plugins.d/plymouth): New target; set LDFLAGS to add "-Xlinker
  --no-warn-execstack".
* plugins.d/plymouth.c (get_pid): When no pid files are found, and we
  are looking through the process list, go though it from the start
  instead of from the end, i.e. in normal alphabetical order and not
  in reverse order.

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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 © 2009-2011 Teddy Hogeborn
7
 
# Copyright © 2009-2011 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)
49
67
 
50
68
# Some useful constants
51
 
domain = 'se.bsnet.fukt'
52
 
server_interface = domain + '.Mandos'
53
 
client_interface = domain + '.Mandos.Client'
54
 
version = "1.3.0"
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)
 
69
domain = "se.recompile"
 
70
server_interface = domain + ".Mandos"
 
71
client_interface = domain + ".Mandos.Client"
 
72
version = "1.8.16"
 
73
 
 
74
try:
 
75
    dbus.OBJECT_MANAGER_IFACE
 
76
except AttributeError:
 
77
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
78
 
63
79
 
64
80
def isoformat_to_datetime(iso):
65
81
    "Parse an ISO 8601 date string to a datetime.datetime()"
74
90
                             int(day),
75
91
                             int(hour),
76
92
                             int(minute),
77
 
                             int(second),           # Whole seconds
78
 
                             int(fraction*1000000)) # Microseconds
79
 
 
80
 
class MandosClientPropertyCache(object):
 
93
                             int(second),            # Whole seconds
 
94
                             int(fraction*1000000))  # Microseconds
 
95
 
 
96
 
 
97
class MandosClientPropertyCache:
81
98
    """This wraps a Mandos Client D-Bus proxy object, caches the
82
99
    properties and calls a hook function when any of them are
83
100
    changed.
84
101
    """
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.
 
102
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
103
        self.proxy = proxy_object  # Mandos Client proxy object
 
104
        self.properties = dict() if properties is None else properties
 
105
        self.property_changed_match = (
 
106
            self.proxy.connect_to_signal("PropertiesChanged",
 
107
                                         self.properties_changed,
 
108
                                         dbus.PROPERTIES_IFACE,
 
109
                                         byte_arrays=True))
 
110
 
 
111
        if properties is None:
 
112
            self.properties.update(self.proxy.GetAll(
 
113
                client_interface,
 
114
                dbus_interface=dbus.PROPERTIES_IFACE))
 
115
 
 
116
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
117
 
 
118
    def properties_changed(self, interface, properties, invalidated):
 
119
        """This is called whenever we get a PropertiesChanged signal
 
120
        It updates the changed properties in the "properties" dict.
105
121
        """
106
122
        # Update properties dict with new value
107
 
        self.properties[property] = value
 
123
        if interface == client_interface:
 
124
            self.properties.update(properties)
 
125
 
 
126
    def delete(self):
 
127
        self.property_changed_match.remove()
108
128
 
109
129
 
110
130
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
111
131
    """A Mandos Client which is visible on the screen.
112
132
    """
113
 
    
 
133
 
114
134
    def __init__(self, server_proxy_object=None, update_hook=None,
115
 
                 delete_hook=None, logger=None, *args, **kwargs):
 
135
                 delete_hook=None, **kwargs):
116
136
        # Called on update
117
137
        self.update_hook = update_hook
118
138
        # Called on delete
119
139
        self.delete_hook = delete_hook
120
140
        # Mandos Server proxy object
121
141
        self.server_proxy_object = server_proxy_object
122
 
        # Logger
123
 
        self.logger = logger
124
 
        
 
142
 
125
143
        self._update_timer_callback_tag = None
126
 
        self._update_timer_callback_lock = 0
127
 
        self.last_checker_failed = False
128
 
        
 
144
 
129
145
        # The widget shown normally
130
146
        self._text_widget = urwid.Text("")
131
147
        # The widget shown when we have focus
132
148
        self._focus_text_widget = urwid.Text("")
133
 
        super(MandosClientWidget, self).__init__(
134
 
            update_hook=update_hook, delete_hook=delete_hook,
135
 
            *args, **kwargs)
 
149
        super(MandosClientWidget, self).__init__(**kwargs)
136
150
        self.update()
137
151
        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
 
        
 
152
 
 
153
        self.match_objects = (
 
154
            self.proxy.connect_to_signal("CheckerCompleted",
 
155
                                         self.checker_completed,
 
156
                                         client_interface,
 
157
                                         byte_arrays=True),
 
158
            self.proxy.connect_to_signal("CheckerStarted",
 
159
                                         self.checker_started,
 
160
                                         client_interface,
 
161
                                         byte_arrays=True),
 
162
            self.proxy.connect_to_signal("GotSecret",
 
163
                                         self.got_secret,
 
164
                                         client_interface,
 
165
                                         byte_arrays=True),
 
166
            self.proxy.connect_to_signal("NeedApproval",
 
167
                                         self.need_approval,
 
168
                                         client_interface,
 
169
                                         byte_arrays=True),
 
170
            self.proxy.connect_to_signal("Rejected",
 
171
                                         self.rejected,
 
172
                                         client_interface,
 
173
                                         byte_arrays=True))
 
174
        log.debug("Created client %s", self.properties["Name"])
 
175
 
184
176
    def using_timer(self, flag):
185
177
        """Call this method with True or False when timer should be
186
178
        activated or deactivated.
187
179
        """
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)
 
180
        if flag and self._update_timer_callback_tag is None:
 
181
            # Will update the shown timer value every second
 
182
            self._update_timer_callback_tag = (
 
183
                GLib.timeout_add(1000,
 
184
                                 glib_safely(self.update_timer)))
 
185
        elif not (flag or self._update_timer_callback_tag is None):
 
186
            GLib.source_remove(self._update_timer_callback_tag)
199
187
            self._update_timer_callback_tag = None
200
 
    
 
188
 
201
189
    def checker_completed(self, exitstatus, condition, command):
202
190
        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))
 
191
            log.debug('Checker for client %s (command "%s")'
 
192
                      " succeeded", self.properties["Name"], command)
209
193
            self.update()
210
194
            return
211
195
        # Checker failed
212
 
        if not self.last_checker_failed:
213
 
            self.last_checker_failed = True
214
 
            self.using_timer(True)
215
196
        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)))
 
197
            log.info('Checker for client %s (command "%s") failed'
 
198
                     " with exit code %d", self.properties["Name"],
 
199
                     command, os.WEXITSTATUS(condition))
220
200
        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')
 
201
            log.info('Checker for client %s (command "%s") was'
 
202
                     " killed by signal %d", self.properties["Name"],
 
203
                     command, os.WTERMSIG(condition))
232
204
        self.update()
233
 
    
 
205
 
234
206
    def checker_started(self, command):
235
 
        #self.logger('Client %s started checker "%s"'
236
 
        #            % (self.properties["Name"], unicode(command)))
237
 
        pass
238
 
    
 
207
        """Server signals that a checker started."""
 
208
        log.debug('Client %s started checker "%s"',
 
209
                  self.properties["Name"], command)
 
210
 
239
211
    def got_secret(self):
240
 
        self.last_checker_failed = False
241
 
        self.logger('Client %s received its secret'
242
 
                    % self.properties["Name"])
243
 
    
 
212
        log.info("Client %s received its secret",
 
213
                 self.properties["Name"])
 
214
 
244
215
    def need_approval(self, timeout, default):
245
216
        if not default:
246
 
            message = 'Client %s needs approval within %s seconds'
 
217
            message = "Client %s needs approval within %f seconds"
247
218
        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
 
    
 
219
            message = "Client %s will get its secret in %f seconds"
 
220
        log.info(message, self.properties["Name"], timeout/1000)
 
221
 
253
222
    def rejected(self, reason):
254
 
        self.logger('Client %s was rejected; reason: %s'
255
 
                    % (self.properties["Name"], reason))
256
 
    
 
223
        log.info("Client %s was rejected; reason: %s",
 
224
                 self.properties["Name"], reason)
 
225
 
257
226
    def selectable(self):
258
227
        """Make this a "selectable" widget.
259
228
        This overrides the method from urwid.FlowWidget."""
260
229
        return True
261
 
    
 
230
 
262
231
    def rows(self, maxcolrow, focus=False):
263
232
        """How many rows this widget will occupy might depend on
264
233
        whether we have focus or not.
265
234
        This overrides the method from urwid.FlowWidget"""
266
235
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
267
 
    
 
236
 
268
237
    def current_widget(self, focus=False):
269
238
        if focus or self.opened:
270
239
            return self._focus_widget
271
240
        return self._widget
272
 
    
 
241
 
273
242
    def update(self):
274
243
        "Called when what is visible on the screen should be updated."
275
244
        # 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
 
                          }
 
245
        with_standout = {"normal": "standout",
 
246
                         "bold": "bold-standout",
 
247
                         "underline-blink":
 
248
                         "underline-blink-standout",
 
249
                         "bold-underline-blink":
 
250
                         "bold-underline-blink-standout",
 
251
                         }
283
252
 
284
253
        # Rebuild focus and non-focus widgets using current properties
285
254
 
286
255
        # Base part of a client. Name!
287
 
        base = ('%(name)s: '
288
 
                      % {"name": self.properties["Name"]})
 
256
        base = "{name}: ".format(name=self.properties["Name"])
289
257
        if not self.properties["Enabled"]:
290
258
            message = "DISABLED"
 
259
            self.using_timer(False)
291
260
        elif self.properties["ApprovalPending"]:
292
 
            timeout = datetime.timedelta(milliseconds
293
 
                                         = self.properties
294
 
                                         ["ApprovalDelay"])
 
261
            timeout = datetime.timedelta(
 
262
                milliseconds=self.properties["ApprovalDelay"])
295
263
            last_approval_request = isoformat_to_datetime(
296
264
                self.properties["LastApprovalRequest"])
297
265
            if last_approval_request is not None:
298
 
                timer = timeout - (datetime.datetime.utcnow()
299
 
                                   - last_approval_request)
 
266
                timer = max(timeout - (datetime.datetime.utcnow()
 
267
                                       - last_approval_request),
 
268
                            datetime.timedelta())
300
269
            else:
301
270
                timer = datetime.timedelta()
302
271
            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])
 
272
                message = "Approval in {}. (d)eny?"
 
273
            else:
 
274
                message = "Denial in {}. (a)pprove?"
 
275
            message = message.format(str(timer).rsplit(".", 1)[0])
 
276
            self.using_timer(True)
 
277
        elif self.properties["LastCheckerStatus"] != 0:
 
278
            # When checker has failed, show timer until client expires
 
279
            expires = self.properties["Expires"]
 
280
            if expires == "":
 
281
                timer = datetime.timedelta(0)
 
282
            else:
 
283
                expires = (datetime.datetime.strptime
 
284
                           (expires, "%Y-%m-%dT%H:%M:%S.%f"))
 
285
                timer = max(expires - datetime.datetime.utcnow(),
 
286
                            datetime.timedelta())
 
287
            message = ("A checker has failed! Time until client"
 
288
                       " gets disabled: {}"
 
289
                       .format(str(timer).rsplit(".", 1)[0]))
 
290
            self.using_timer(True)
319
291
        else:
320
292
            message = "enabled"
321
 
        self._text = "%s%s" % (base, message)
322
 
            
 
293
            self.using_timer(False)
 
294
        self._text = "{}{}".format(base, message)
 
295
 
323
296
        if not urwid.supports_unicode():
324
297
            self._text = self._text.encode("ascii", "replace")
325
298
        textlist = [("normal", self._text)]
335
308
        # Run update hook, if any
336
309
        if self.update_hook is not None:
337
310
            self.update_hook()
338
 
    
 
311
 
339
312
    def update_timer(self):
340
 
        "called by gobject"
 
313
        """called by GLib. Will indefinitely loop until
 
314
        GLib.source_remove() on tag is called
 
315
        """
341
316
        self.update()
342
317
        return True             # Keep calling this
343
 
    
344
 
    def delete(self):
 
318
 
 
319
    def delete(self, **kwargs):
345
320
        if self._update_timer_callback_tag is not None:
346
 
            gobject.source_remove(self._update_timer_callback_tag)
 
321
            GLib.source_remove(self._update_timer_callback_tag)
347
322
            self._update_timer_callback_tag = None
 
323
        for match in self.match_objects:
 
324
            match.remove()
 
325
        self.match_objects = ()
348
326
        if self.delete_hook is not None:
349
327
            self.delete_hook(self)
350
 
    
 
328
        return super(MandosClientWidget, self).delete(**kwargs)
 
329
 
351
330
    def render(self, maxcolrow, focus=False):
352
331
        """Render differently if we have focus.
353
332
        This overrides the method from urwid.FlowWidget"""
354
333
        return self.current_widget(focus).render(maxcolrow,
355
334
                                                 focus=focus)
356
 
    
 
335
 
357
336
    def keypress(self, maxcolrow, key):
358
337
        """Handle keys.
359
338
        This overrides the method from urwid.FlowWidget"""
360
339
        if key == "+":
361
 
            self.proxy.Enable(dbus_interface = client_interface,
362
 
                              ignore_reply=True)
 
340
            self.proxy.Set(client_interface, "Enabled",
 
341
                           dbus.Boolean(True), ignore_reply=True,
 
342
                           dbus_interface=dbus.PROPERTIES_IFACE)
363
343
        elif key == "-":
364
 
            self.proxy.Disable(dbus_interface = client_interface,
365
 
                               ignore_reply=True)
 
344
            self.proxy.Set(client_interface, "Enabled", False,
 
345
                           ignore_reply=True,
 
346
                           dbus_interface=dbus.PROPERTIES_IFACE)
366
347
        elif key == "a":
367
348
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
368
 
                               dbus_interface = client_interface,
 
349
                               dbus_interface=client_interface,
369
350
                               ignore_reply=True)
370
351
        elif key == "d":
371
352
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
372
 
                                  dbus_interface = client_interface,
 
353
                               dbus_interface=client_interface,
373
354
                               ignore_reply=True)
374
355
        elif key == "R" or key == "_" or key == "ctrl k":
375
356
            self.server_proxy_object.RemoveClient(self.proxy
376
357
                                                  .object_path,
377
358
                                                  ignore_reply=True)
378
359
        elif key == "s":
379
 
            self.proxy.StartChecker(dbus_interface = client_interface,
380
 
                                    ignore_reply=True)
 
360
            self.proxy.Set(client_interface, "CheckerRunning",
 
361
                           dbus.Boolean(True), ignore_reply=True,
 
362
                           dbus_interface=dbus.PROPERTIES_IFACE)
381
363
        elif key == "S":
382
 
            self.proxy.StopChecker(dbus_interface = client_interface,
383
 
                                   ignore_reply=True)
 
364
            self.proxy.Set(client_interface, "CheckerRunning",
 
365
                           dbus.Boolean(False), ignore_reply=True,
 
366
                           dbus_interface=dbus.PROPERTIES_IFACE)
384
367
        elif key == "C":
385
 
            self.proxy.CheckedOK(dbus_interface = client_interface,
 
368
            self.proxy.CheckedOK(dbus_interface=client_interface,
386
369
                                 ignore_reply=True)
387
370
        # xxx
388
371
#         elif key == "p" or key == "=":
393
376
#             self.open()
394
377
        else:
395
378
            return key
396
 
    
397
 
    def property_changed(self, property=None, value=None,
398
 
                         *args, **kwargs):
399
 
        """Call self.update() if old value is not new value.
 
379
 
 
380
    def properties_changed(self, interface, properties, invalidated):
 
381
        """Call self.update() if any properties changed.
400
382
        This overrides the method from MandosClientPropertyCache"""
401
 
        property_name = unicode(property)
402
 
        old_value = self.properties.get(property_name)
403
 
        super(MandosClientWidget, self).property_changed(
404
 
            property=property, value=value, *args, **kwargs)
405
 
        if self.properties.get(property_name) != old_value:
 
383
        old_values = {key: self.properties.get(key)
 
384
                      for key in properties.keys()}
 
385
        super(MandosClientWidget, self).properties_changed(
 
386
            interface, properties, invalidated)
 
387
        if any(old_values[key] != self.properties.get(key)
 
388
               for key in old_values):
406
389
            self.update()
407
390
 
408
391
 
 
392
def glib_safely(func, retval=True):
 
393
    def safe_func(*args, **kwargs):
 
394
        try:
 
395
            return func(*args, **kwargs)
 
396
        except Exception:
 
397
            log.exception("")
 
398
            return retval
 
399
    return safe_func
 
400
 
 
401
 
409
402
class ConstrainedListBox(urwid.ListBox):
410
403
    """Like a normal urwid.ListBox, but will consume all "up" or
411
404
    "down" key presses, thus not allowing any containing widgets to
412
405
    use them as an excuse to shift focus away from this widget.
413
406
    """
414
 
    def keypress(self, maxcolrow, key):
415
 
        ret = super(ConstrainedListBox, self).keypress(maxcolrow, key)
 
407
    def keypress(self, *args, **kwargs):
 
408
        ret = (super(ConstrainedListBox, self)
 
409
               .keypress(*args, **kwargs))
416
410
        if ret in ("up", "down"):
417
411
            return
418
412
        return ret
419
413
 
420
414
 
421
 
class UserInterface(object):
 
415
class UserInterface:
422
416
    """This is the entire user interface - the whole screen
423
417
    with boxes, lists of client widgets, etc.
424
418
    """
425
419
    def __init__(self, max_log_length=1000):
426
420
        DBusGMainLoop(set_as_default=True)
427
 
        
 
421
 
428
422
        self.screen = urwid.curses_display.Screen()
429
 
        
 
423
 
430
424
        self.screen.register_palette((
431
425
                ("normal",
432
426
                 "default", "default", None),
433
427
                ("bold",
434
 
                 "default", "default", "bold"),
 
428
                 "bold", "default", "bold"),
435
429
                ("underline-blink",
436
 
                 "default", "default", "underline"),
 
430
                 "underline,blink", "default", "underline,blink"),
437
431
                ("standout",
438
 
                 "default", "default", "standout"),
 
432
                 "standout", "default", "standout"),
439
433
                ("bold-underline-blink",
440
 
                 "default", "default", ("bold", "underline")),
 
434
                 "bold,underline,blink", "default",
 
435
                 "bold,underline,blink"),
441
436
                ("bold-standout",
442
 
                 "default", "default", ("bold", "standout")),
 
437
                 "bold,standout", "default", "bold,standout"),
443
438
                ("underline-blink-standout",
444
 
                 "default", "default", ("underline", "standout")),
 
439
                 "underline,blink,standout", "default",
 
440
                 "underline,blink,standout"),
445
441
                ("bold-underline-blink-standout",
446
 
                 "default", "default", ("bold", "underline",
447
 
                                          "standout")),
 
442
                 "bold,underline,blink,standout", "default",
 
443
                 "bold,underline,blink,standout"),
448
444
                ))
449
 
        
 
445
 
450
446
        if urwid.supports_unicode():
451
 
            self.divider = "─" # \u2500
452
 
            #self.divider = "━" # \u2501
 
447
            self.divider = "─"  # \u2500
453
448
        else:
454
 
            #self.divider = "-" # \u002d
455
 
            self.divider = "_" # \u005f
456
 
        
 
449
            self.divider = "_"  # \u005f
 
450
 
457
451
        self.screen.start()
458
 
        
 
452
 
459
453
        self.size = self.screen.get_cols_rows()
460
 
        
 
454
 
461
455
        self.clients = urwid.SimpleListWalker([])
462
456
        self.clients_dict = {}
463
 
        
 
457
 
464
458
        # We will add Text widgets to this list
465
 
        self.log = []
 
459
        self.log = urwid.SimpleListWalker([])
466
460
        self.max_log_length = max_log_length
467
 
        
 
461
 
468
462
        # We keep a reference to the log widget so we can remove it
469
463
        # from the ListWalker without it getting destroyed
470
464
        self.logbox = ConstrainedListBox(self.log)
471
 
        
 
465
 
472
466
        # This keeps track of whether self.uilist currently has
473
467
        # self.logbox in it or not
474
468
        self.log_visible = True
475
469
        self.log_wrap = "any"
476
 
        
 
470
 
 
471
        self.loghandler = UILogHandler(self)
 
472
 
477
473
        self.rebuild()
478
 
        self.log_message_raw(("bold",
479
 
                              "Mandos Monitor version " + version))
480
 
        self.log_message_raw(("bold",
481
 
                              "q: Quit  ?: Help"))
482
 
        
483
 
        self.busname = domain + '.Mandos'
484
 
        self.main_loop = gobject.MainLoop()
485
 
        self.bus = dbus.SystemBus()
486
 
        mandos_dbus_objc = self.bus.get_object(
487
 
            self.busname, "/", follow_name_owner_changes=True)
488
 
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
489
 
                                          dbus_interface
490
 
                                          = server_interface)
491
 
        try:
492
 
            mandos_clients = (self.mandos_serv
493
 
                              .GetAllClientsWithProperties())
494
 
        except dbus.exceptions.DBusException:
495
 
            mandos_clients = dbus.Dictionary()
496
 
        
497
 
        (self.mandos_serv
498
 
         .connect_to_signal("ClientRemoved",
499
 
                            self.find_and_remove_client,
500
 
                            dbus_interface=server_interface,
501
 
                            byte_arrays=True))
502
 
        (self.mandos_serv
503
 
         .connect_to_signal("ClientAdded",
504
 
                            self.add_new_client,
505
 
                            dbus_interface=server_interface,
506
 
                            byte_arrays=True))
507
 
        (self.mandos_serv
508
 
         .connect_to_signal("ClientNotFound",
509
 
                            self.client_not_found,
510
 
                            dbus_interface=server_interface,
511
 
                            byte_arrays=True))
512
 
        for path, client in mandos_clients.iteritems():
513
 
            client_proxy_object = self.bus.get_object(self.busname,
514
 
                                                      path)
515
 
            self.add_client(MandosClientWidget(server_proxy_object
516
 
                                               =self.mandos_serv,
517
 
                                               proxy_object
518
 
                                               =client_proxy_object,
519
 
                                               properties=client,
520
 
                                               update_hook
521
 
                                               =self.refresh,
522
 
                                               delete_hook
523
 
                                               =self.remove_client,
524
 
                                               logger
525
 
                                               =self.log_message),
526
 
                            path=path)
527
 
    
528
 
    def client_not_found(self, fingerprint, address):
529
 
        self.log_message(("Client with address %s and fingerprint %s"
530
 
                          " could not be found" % (address,
531
 
                                                    fingerprint)))
532
 
    
 
474
        self.add_log_line(("bold",
 
475
                           "Mandos Monitor version " + version))
 
476
        self.add_log_line(("bold", "q: Quit  ?: Help"))
 
477
 
 
478
        self.busname = domain + ".Mandos"
 
479
        self.main_loop = GLib.MainLoop()
 
480
 
 
481
    def client_not_found(self, key_id, address):
 
482
        log.info("Client with address %s and key ID %s could"
 
483
                 " not be found", address, key_id)
 
484
 
533
485
    def rebuild(self):
534
486
        """This rebuilds the User Interface.
535
487
        Call this when the widget layout needs to change"""
536
488
        self.uilist = []
537
 
        #self.uilist.append(urwid.ListBox(self.clients))
 
489
        # self.uilist.append(urwid.ListBox(self.clients))
538
490
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
539
491
                                                          clients),
540
 
                                       #header=urwid.Divider(),
 
492
                                       # header=urwid.Divider(),
541
493
                                       header=None,
542
 
                                       footer=
543
 
                                       urwid.Divider(div_char=
544
 
                                                     self.divider)))
 
494
                                       footer=urwid.Divider(
 
495
                                           div_char=self.divider)))
545
496
        if self.log_visible:
546
497
            self.uilist.append(self.logbox)
547
 
            pass
548
498
        self.topwidget = urwid.Pile(self.uilist)
549
 
    
550
 
    def log_message(self, message):
551
 
        timestamp = datetime.datetime.now().isoformat()
552
 
        self.log_message_raw(timestamp + ": " + message)
553
 
    
554
 
    def log_message_raw(self, markup):
555
 
        """Add a log message to the log buffer."""
 
499
 
 
500
    def add_log_line(self, markup):
556
501
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
557
 
        if (self.max_log_length
558
 
            and len(self.log) > self.max_log_length):
559
 
            del self.log[0:len(self.log)-self.max_log_length-1]
560
 
        self.logbox.set_focus(len(self.logbox.body.contents),
 
502
        if self.max_log_length:
 
503
            if len(self.log) > self.max_log_length:
 
504
                del self.log[0:(len(self.log) - self.max_log_length)]
 
505
        self.logbox.set_focus(len(self.logbox.body.contents)-1,
561
506
                              coming_from="above")
562
507
        self.refresh()
563
 
    
 
508
 
564
509
    def toggle_log_display(self):
565
510
        """Toggle visibility of the log buffer."""
566
511
        self.log_visible = not self.log_visible
567
512
        self.rebuild()
568
 
        #self.log_message("Log visibility changed to: "
569
 
        #                 + unicode(self.log_visible))
570
 
    
 
513
        log.debug("Log visibility changed to: %s", self.log_visible)
 
514
 
571
515
    def change_log_display(self):
572
516
        """Change type of log display.
573
517
        Currently, this toggles wrapping of text lines."""
577
521
            self.log_wrap = "clip"
578
522
        for textwidget in self.log:
579
523
            textwidget.set_wrap_mode(self.log_wrap)
580
 
        #self.log_message("Wrap mode: " + self.log_wrap)
581
 
    
582
 
    def find_and_remove_client(self, path, name):
583
 
        """Find an client from its object path and remove it.
584
 
        
585
 
        This is connected to the ClientRemoved signal from the
 
524
        log.debug("Wrap mode: %s", self.log_wrap)
 
525
 
 
526
    def find_and_remove_client(self, path, interfaces):
 
527
        """Find a client by its object path and remove it.
 
528
 
 
529
        This is connected to the InterfacesRemoved signal from the
586
530
        Mandos server object."""
 
531
        if client_interface not in interfaces:
 
532
            # Not a Mandos client object; ignore
 
533
            return
587
534
        try:
588
535
            client = self.clients_dict[path]
589
536
        except KeyError:
590
537
            # not found?
591
 
            return
592
 
        self.remove_client(client, path)
593
 
    
594
 
    def add_new_client(self, path):
 
538
            log.warning("Unknown client %s removed", path)
 
539
            return
 
540
        client.delete()
 
541
 
 
542
    def add_new_client(self, path, ifs_and_props):
 
543
        """Find a client by its object path and remove it.
 
544
 
 
545
        This is connected to the InterfacesAdded signal from the
 
546
        Mandos server object.
 
547
        """
 
548
        if client_interface not in ifs_and_props:
 
549
            # Not a Mandos client object; ignore
 
550
            return
595
551
        client_proxy_object = self.bus.get_object(self.busname, path)
596
 
        self.add_client(MandosClientWidget(server_proxy_object
597
 
                                           =self.mandos_serv,
598
 
                                           proxy_object
599
 
                                           =client_proxy_object,
600
 
                                           update_hook
601
 
                                           =self.refresh,
602
 
                                           delete_hook
603
 
                                           =self.remove_client,
604
 
                                           logger
605
 
                                           =self.log_message),
 
552
        self.add_client(MandosClientWidget(
 
553
            server_proxy_object=self.mandos_serv,
 
554
            proxy_object=client_proxy_object,
 
555
            update_hook=self.refresh,
 
556
            delete_hook=self.remove_client,
 
557
            properties=dict(ifs_and_props[client_interface])),
606
558
                        path=path)
607
 
    
 
559
 
608
560
    def add_client(self, client, path=None):
609
561
        self.clients.append(client)
610
562
        if path is None:
611
563
            path = client.proxy.object_path
612
564
        self.clients_dict[path] = client
613
 
        self.clients.sort(None, lambda c: c.properties["Name"])
 
565
        self.clients.sort(key=lambda c: c.properties["Name"])
614
566
        self.refresh()
615
 
    
 
567
 
616
568
    def remove_client(self, client, path=None):
617
569
        self.clients.remove(client)
618
570
        if path is None:
619
571
            path = client.proxy.object_path
620
572
        del self.clients_dict[path]
621
 
        if not self.clients_dict:
622
 
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
623
 
            # is completely emptied, we need to recreate it.
624
 
            self.clients = urwid.SimpleListWalker([])
625
 
            self.rebuild()
626
573
        self.refresh()
627
 
    
 
574
 
628
575
    def refresh(self):
629
576
        """Redraw the screen"""
630
577
        canvas = self.topwidget.render(self.size, focus=True)
631
578
        self.screen.draw_screen(self.size, canvas)
632
 
    
 
579
 
633
580
    def run(self):
634
581
        """Start the main loop and exit when it's done."""
 
582
        log.addHandler(self.loghandler)
 
583
        self.orig_log_propagate = log.propagate
 
584
        log.propagate = False
 
585
        self.orig_log_level = log.level
 
586
        log.setLevel("INFO")
 
587
        self.bus = dbus.SystemBus()
 
588
        mandos_dbus_objc = self.bus.get_object(
 
589
            self.busname, "/", follow_name_owner_changes=True)
 
590
        self.mandos_serv = dbus.Interface(
 
591
            mandos_dbus_objc, dbus_interface=server_interface)
 
592
        try:
 
593
            mandos_clients = (self.mandos_serv
 
594
                              .GetAllClientsWithProperties())
 
595
            if not mandos_clients:
 
596
                log.warning("Note: Server has no clients.")
 
597
        except dbus.exceptions.DBusException:
 
598
            log.warning("Note: No Mandos server running.")
 
599
            mandos_clients = dbus.Dictionary()
 
600
 
 
601
        (self.mandos_serv
 
602
         .connect_to_signal("InterfacesRemoved",
 
603
                            self.find_and_remove_client,
 
604
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
605
                            byte_arrays=True))
 
606
        (self.mandos_serv
 
607
         .connect_to_signal("InterfacesAdded",
 
608
                            self.add_new_client,
 
609
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
610
                            byte_arrays=True))
 
611
        (self.mandos_serv
 
612
         .connect_to_signal("ClientNotFound",
 
613
                            self.client_not_found,
 
614
                            dbus_interface=server_interface,
 
615
                            byte_arrays=True))
 
616
        for path, client in mandos_clients.items():
 
617
            client_proxy_object = self.bus.get_object(self.busname,
 
618
                                                      path)
 
619
            self.add_client(MandosClientWidget(
 
620
                server_proxy_object=self.mandos_serv,
 
621
                proxy_object=client_proxy_object,
 
622
                properties=client,
 
623
                update_hook=self.refresh,
 
624
                delete_hook=self.remove_client),
 
625
                            path=path)
 
626
 
635
627
        self.refresh()
636
 
        self._input_callback_tag = (gobject.io_add_watch
637
 
                                    (sys.stdin.fileno(),
638
 
                                     gobject.IO_IN,
639
 
                                     self.process_input))
 
628
        self._input_callback_tag = (
 
629
            GLib.io_add_watch(
 
630
                GLib.IOChannel.unix_new(sys.stdin.fileno()),
 
631
                GLib.PRIORITY_DEFAULT, GLib.IO_IN,
 
632
                glib_safely(self.process_input)))
640
633
        self.main_loop.run()
641
634
        # Main loop has finished, we should close everything now
642
 
        gobject.source_remove(self._input_callback_tag)
643
 
        self.screen.stop()
644
 
    
 
635
        GLib.source_remove(self._input_callback_tag)
 
636
        with warnings.catch_warnings():
 
637
            warnings.simplefilter("ignore", BytesWarning)
 
638
            self.screen.stop()
 
639
 
645
640
    def stop(self):
646
641
        self.main_loop.quit()
647
 
    
 
642
        log.removeHandler(self.loghandler)
 
643
        log.propagate = self.orig_log_propagate
 
644
 
648
645
    def process_input(self, source, condition):
649
646
        keys = self.screen.get_input()
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
 
                         }
 
647
        translations = {"ctrl n": "down",       # Emacs
 
648
                        "ctrl p": "up",         # Emacs
 
649
                        "ctrl v": "page down",  # Emacs
 
650
                        "meta v": "page up",    # Emacs
 
651
                        " ": "page down",       # less
 
652
                        "f": "page down",       # less
 
653
                        "b": "page up",         # less
 
654
                        "j": "down",            # vi
 
655
                        "k": "up",              # vi
 
656
                        }
660
657
        for key in keys:
661
658
            try:
662
659
                key = translations[key]
663
660
            except KeyError:    # :-)
664
661
                pass
665
 
            
 
662
 
666
663
            if key == "q" or key == "Q":
667
664
                self.stop()
668
665
                break
669
666
            elif key == "window resize":
670
667
                self.size = self.screen.get_cols_rows()
671
668
                self.refresh()
672
 
            elif key == "\f":  # Ctrl-L
 
669
            elif key == "ctrl l":
 
670
                self.screen.clear()
673
671
                self.refresh()
674
672
            elif key == "l" or key == "D":
675
673
                self.toggle_log_display()
681
679
                if not self.log_visible:
682
680
                    self.log_visible = True
683
681
                    self.rebuild()
684
 
                self.log_message_raw(("bold",
685
 
                                      "  ".
686
 
                                      join(("q: Quit",
687
 
                                            "?: Help",
688
 
                                            "l: Log window toggle",
689
 
                                            "TAB: Switch window",
690
 
                                            "w: Wrap (log)"))))
691
 
                self.log_message_raw(("bold",
692
 
                                      "  "
693
 
                                      .join(("Clients:",
694
 
                                             "+: Enable",
695
 
                                             "-: Disable",
696
 
                                             "R: Remove",
697
 
                                             "s: Start new checker",
698
 
                                             "S: Stop checker",
699
 
                                             "C: Checker OK",
700
 
                                             "a: Approve",
701
 
                                             "d: Deny"))))
 
682
                self.add_log_line(("bold",
 
683
                                   "  ".join(("q: Quit",
 
684
                                              "?: Help",
 
685
                                              "l: Log window toggle",
 
686
                                              "TAB: Switch window",
 
687
                                              "w: Wrap (log lines)",
 
688
                                              "v: Toggle verbose log",
 
689
                                   ))))
 
690
                self.add_log_line(("bold",
 
691
                                   "  ".join(("Clients:",
 
692
                                              "+: Enable",
 
693
                                              "-: Disable",
 
694
                                              "R: Remove",
 
695
                                              "s: Start new checker",
 
696
                                              "S: Stop checker",
 
697
                                              "C: Checker OK",
 
698
                                              "a: Approve",
 
699
                                              "d: Deny",
 
700
                                   ))))
702
701
                self.refresh()
703
702
            elif key == "tab":
704
703
                if self.topwidget.get_focus() is self.logbox:
706
705
                else:
707
706
                    self.topwidget.set_focus(self.logbox)
708
707
                self.refresh()
709
 
            #elif (key == "end" or key == "meta >" or key == "G"
710
 
            #      or key == ">"):
711
 
            #    pass            # xxx end-of-buffer
712
 
            #elif (key == "home" or key == "meta <" or key == "g"
713
 
            #      or key == "<"):
714
 
            #    pass            # xxx beginning-of-buffer
715
 
            #elif key == "ctrl e" or key == "$":
716
 
            #    pass            # xxx move-end-of-line
717
 
            #elif key == "ctrl a" or key == "^":
718
 
            #    pass            # xxx move-beginning-of-line
719
 
            #elif key == "ctrl b" or key == "meta (" or key == "h":
720
 
            #    pass            # xxx left
721
 
            #elif key == "ctrl f" or key == "meta )" or key == "l":
722
 
            #    pass            # xxx right
723
 
            #elif key == "a":
724
 
            #    pass            # scroll up log
725
 
            #elif key == "z":
726
 
            #    pass            # scroll down log
 
708
            elif key == "v":
 
709
                if log.level < logging.INFO:
 
710
                    log.setLevel(logging.INFO)
 
711
                    log.info("Verbose mode: Off")
 
712
                else:
 
713
                    log.setLevel(logging.NOTSET)
 
714
                    log.info("Verbose mode: On")
 
715
            # elif (key == "end" or key == "meta >" or key == "G"
 
716
            #       or key == ">"):
 
717
            #     pass            # xxx end-of-buffer
 
718
            # elif (key == "home" or key == "meta <" or key == "g"
 
719
            #       or key == "<"):
 
720
            #     pass            # xxx beginning-of-buffer
 
721
            # elif key == "ctrl e" or key == "$":
 
722
            #     pass            # xxx move-end-of-line
 
723
            # elif key == "ctrl a" or key == "^":
 
724
            #     pass            # xxx move-beginning-of-line
 
725
            # elif key == "ctrl b" or key == "meta (" or key == "h":
 
726
            #     pass            # xxx left
 
727
            # elif key == "ctrl f" or key == "meta )" or key == "l":
 
728
            #     pass            # xxx right
 
729
            # elif key == "a":
 
730
            #     pass            # scroll up log
 
731
            # elif key == "z":
 
732
            #     pass            # scroll down log
727
733
            elif self.topwidget.selectable():
728
734
                self.topwidget.keypress(self.size, key)
729
735
                self.refresh()
730
736
        return True
731
737
 
 
738
 
 
739
class UILogHandler(logging.Handler):
 
740
    def __init__(self, ui, *args, **kwargs):
 
741
        self.ui = ui
 
742
        super(UILogHandler, self).__init__(*args, **kwargs)
 
743
        self.setFormatter(
 
744
            logging.Formatter("%(asctime)s: %(message)s"))
 
745
    def emit(self, record):
 
746
        msg = self.format(record)
 
747
        if record.levelno > logging.INFO:
 
748
            msg = ("bold", msg)
 
749
        self.ui.add_log_line(msg)
 
750
 
 
751
 
732
752
ui = UserInterface()
733
753
try:
734
754
    ui.run()
735
755
except KeyboardInterrupt:
736
 
    ui.screen.stop()
737
 
except Exception, e:
738
 
    ui.log_message(unicode(e))
739
 
    ui.screen.stop()
 
756
    with warnings.catch_warnings():
 
757
        warnings.filterwarnings("ignore", "", BytesWarning)
 
758
        ui.screen.stop()
 
759
except Exception:
 
760
    with warnings.catch_warnings():
 
761
        warnings.filterwarnings("ignore", "", BytesWarning)
 
762
        ui.screen.stop()
740
763
    raise