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# -*- mode: python; coding: utf-8 -*-
 
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# Mandos Monitor - Control and monitor the Mandos server
 
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# Copyright © 2009-2016 Teddy Hogeborn
 
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# Copyright © 2009-2016 Björn Påhlsson
 
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# This program is free software: you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
11
 
# the Free Software Foundation, either version 3 of the License, or
 
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# (at your option) any later version.
 
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#     This program is distributed in the hope that it will be useful,
 
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#     but WITHOUT ANY WARRANTY; without even the implied warranty of
 
16
 
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
17
 
#     GNU General Public License for more details.
 
19
 
# You should have received a copy of the GNU General Public License
 
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# along with this program.  If not, see
 
21
 
# <http://www.gnu.org/licenses/>.
 
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# Contact the authors at <mandos@recompile.se>.
 
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from __future__ import (division, absolute_import, print_function,
 
29
 
    from future_builtins import *
 
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import urwid.curses_display
 
41
 
from dbus.mainloop.glib import DBusGMainLoop
 
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from gi.repository import GLib
 
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if sys.version_info.major == 2:
 
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locale.setlocale(locale.LC_ALL, '')
 
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logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
 
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# Some useful constants
 
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domain = 'se.recompile'
 
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server_interface = domain + '.Mandos'
 
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client_interface = domain + '.Mandos.Client'
 
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    dbus.OBJECT_MANAGER_IFACE
 
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except AttributeError:
 
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    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
69
 
def isoformat_to_datetime(iso):
 
70
 
    "Parse an ISO 8601 date string to a datetime.datetime()"
 
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    d, t = iso.split("T", 1)
 
74
 
    year, month, day = d.split("-", 2)
 
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    hour, minute, second = t.split(":", 2)
 
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    second, fraction = divmod(float(second), 1)
 
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    return datetime.datetime(int(year),
 
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                             int(second),            # Whole seconds
 
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                             int(fraction*1000000))  # Microseconds
 
86
 
class MandosClientPropertyCache(object):
 
87
 
    """This wraps a Mandos Client D-Bus proxy object, caches the
 
88
 
    properties and calls a hook function when any of them are
 
91
 
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
92
 
        self.proxy = proxy_object  # Mandos Client proxy object
 
93
 
        self.properties = dict() if properties is None else properties
 
94
 
        self.property_changed_match = (
 
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            self.proxy.connect_to_signal("PropertiesChanged",
 
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                                         self.properties_changed,
 
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                                         dbus.PROPERTIES_IFACE,
 
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        if properties is None:
 
101
 
            self.properties.update(self.proxy.GetAll(
 
103
 
                dbus_interface=dbus.PROPERTIES_IFACE))
 
105
 
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
107
 
    def properties_changed(self, interface, properties, invalidated):
 
108
 
        """This is called whenever we get a PropertiesChanged signal
 
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        It updates the changed properties in the "properties" dict.
 
111
 
        # Update properties dict with new value
 
112
 
        if interface == client_interface:
 
113
 
            self.properties.update(properties)
 
116
 
        self.property_changed_match.remove()
 
119
 
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
 
120
 
    """A Mandos Client which is visible on the screen.
 
123
 
    def __init__(self, server_proxy_object=None, update_hook=None,
 
124
 
                 delete_hook=None, logger=None, **kwargs):
 
126
 
        self.update_hook = update_hook
 
128
 
        self.delete_hook = delete_hook
 
129
 
        # Mandos Server proxy object
 
130
 
        self.server_proxy_object = server_proxy_object
 
134
 
        self._update_timer_callback_tag = None
 
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        # The widget shown normally
 
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        self._text_widget = urwid.Text("")
 
138
 
        # The widget shown when we have focus
 
139
 
        self._focus_text_widget = urwid.Text("")
 
140
 
        super(MandosClientWidget, self).__init__(**kwargs)
 
144
 
        self.match_objects = (
 
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            self.proxy.connect_to_signal("CheckerCompleted",
 
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                                         self.checker_completed,
 
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            self.proxy.connect_to_signal("CheckerStarted",
 
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                                         self.checker_started,
 
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            self.proxy.connect_to_signal("GotSecret",
 
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            self.proxy.connect_to_signal("NeedApproval",
 
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            self.proxy.connect_to_signal("Rejected",
 
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        self.logger('Created client {}'
 
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                    .format(self.properties["Name"]), level=0)
 
168
 
    def using_timer(self, flag):
 
169
 
        """Call this method with True or False when timer should be
 
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        activated or deactivated.
 
172
 
        if flag and self._update_timer_callback_tag is None:
 
173
 
            # Will update the shown timer value every second
 
174
 
            self._update_timer_callback_tag = (GLib.timeout_add
 
177
 
        elif not (flag or self._update_timer_callback_tag is None):
 
178
 
            GLib.source_remove(self._update_timer_callback_tag)
 
179
 
            self._update_timer_callback_tag = None
 
181
 
    def checker_completed(self, exitstatus, condition, command):
 
183
 
            self.logger('Checker for client {} (command "{}")'
 
184
 
                        ' succeeded'.format(self.properties["Name"],
 
189
 
        if os.WIFEXITED(condition):
 
190
 
            self.logger('Checker for client {} (command "{}") failed'
 
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                        .format(self.properties["Name"], command,
 
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                                os.WEXITSTATUS(condition)))
 
194
 
        elif os.WIFSIGNALED(condition):
 
195
 
            self.logger('Checker for client {} (command "{}") was'
 
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                        ' killed by signal {}'
 
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                        .format(self.properties["Name"], command,
 
198
 
                                os.WTERMSIG(condition)))
 
201
 
    def checker_started(self, command):
 
202
 
        """Server signals that a checker started."""
 
203
 
        self.logger('Client {} started checker "{}"'
 
204
 
                    .format(self.properties["Name"],
 
207
 
    def got_secret(self):
 
208
 
        self.logger('Client {} received its secret'
 
209
 
                    .format(self.properties["Name"]))
 
211
 
    def need_approval(self, timeout, default):
 
213
 
            message = 'Client {} needs approval within {} seconds'
 
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            message = 'Client {} will get its secret in {} seconds'
 
216
 
        self.logger(message.format(self.properties["Name"],
 
219
 
    def rejected(self, reason):
 
220
 
        self.logger('Client {} was rejected; reason: {}'
 
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                    .format(self.properties["Name"], reason))
 
223
 
    def selectable(self):
 
224
 
        """Make this a "selectable" widget.
 
225
 
        This overrides the method from urwid.FlowWidget."""
 
228
 
    def rows(self, maxcolrow, focus=False):
 
229
 
        """How many rows this widget will occupy might depend on
 
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        whether we have focus or not.
 
231
 
        This overrides the method from urwid.FlowWidget"""
 
232
 
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
234
 
    def current_widget(self, focus=False):
 
235
 
        if focus or self.opened:
 
236
 
            return self._focus_widget
 
240
 
        "Called when what is visible on the screen should be updated."
 
241
 
        # How to add standout mode to a style
 
242
 
        with_standout = {"normal": "standout",
 
243
 
                         "bold": "bold-standout",
 
245
 
                         "underline-blink-standout",
 
246
 
                         "bold-underline-blink":
 
247
 
                         "bold-underline-blink-standout",
 
250
 
        # Rebuild focus and non-focus widgets using current properties
 
252
 
        # Base part of a client. Name!
 
253
 
        base = '{name}: '.format(name=self.properties["Name"])
 
254
 
        if not self.properties["Enabled"]:
 
256
 
            self.using_timer(False)
 
257
 
        elif self.properties["ApprovalPending"]:
 
258
 
            timeout = datetime.timedelta(
 
259
 
                milliseconds=self.properties["ApprovalDelay"])
 
260
 
            last_approval_request = isoformat_to_datetime(
 
261
 
                self.properties["LastApprovalRequest"])
 
262
 
            if last_approval_request is not None:
 
263
 
                timer = max(timeout - (datetime.datetime.utcnow()
 
264
 
                                       - last_approval_request),
 
265
 
                            datetime.timedelta())
 
267
 
                timer = datetime.timedelta()
 
268
 
            if self.properties["ApprovedByDefault"]:
 
269
 
                message = "Approval in {}. (d)eny?"
 
271
 
                message = "Denial in {}. (a)pprove?"
 
272
 
            message = message.format(str(timer).rsplit(".", 1)[0])
 
273
 
            self.using_timer(True)
 
274
 
        elif self.properties["LastCheckerStatus"] != 0:
 
275
 
            # When checker has failed, show timer until client expires
 
276
 
            expires = self.properties["Expires"]
 
278
 
                timer = datetime.timedelta(0)
 
280
 
                expires = (datetime.datetime.strptime
 
281
 
                           (expires, '%Y-%m-%dT%H:%M:%S.%f'))
 
282
 
                timer = max(expires - datetime.datetime.utcnow(),
 
283
 
                            datetime.timedelta())
 
284
 
            message = ('A checker has failed! Time until client'
 
286
 
                       .format(str(timer).rsplit(".", 1)[0]))
 
287
 
            self.using_timer(True)
 
290
 
            self.using_timer(False)
 
291
 
        self._text = "{}{}".format(base, message)
 
293
 
        if not urwid.supports_unicode():
 
294
 
            self._text = self._text.encode("ascii", "replace")
 
295
 
        textlist = [("normal", self._text)]
 
296
 
        self._text_widget.set_text(textlist)
 
297
 
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
299
 
                                          if isinstance(text, tuple)
 
301
 
                                          for text in textlist])
 
302
 
        self._widget = self._text_widget
 
303
 
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
305
 
        # Run update hook, if any
 
306
 
        if self.update_hook is not None:
 
309
 
    def update_timer(self):
 
310
 
        """called by GLib. Will indefinitely loop until
 
311
 
        GLib.source_remove() on tag is called
 
314
 
        return True             # Keep calling this
 
316
 
    def delete(self, **kwargs):
 
317
 
        if self._update_timer_callback_tag is not None:
 
318
 
            GLib.source_remove(self._update_timer_callback_tag)
 
319
 
            self._update_timer_callback_tag = None
 
320
 
        for match in self.match_objects:
 
322
 
        self.match_objects = ()
 
323
 
        if self.delete_hook is not None:
 
324
 
            self.delete_hook(self)
 
325
 
        return super(MandosClientWidget, self).delete(**kwargs)
 
327
 
    def render(self, maxcolrow, focus=False):
 
328
 
        """Render differently if we have focus.
 
329
 
        This overrides the method from urwid.FlowWidget"""
 
330
 
        return self.current_widget(focus).render(maxcolrow,
 
333
 
    def keypress(self, maxcolrow, key):
 
335
 
        This overrides the method from urwid.FlowWidget"""
 
337
 
            self.proxy.Set(client_interface, "Enabled",
 
338
 
                           dbus.Boolean(True), ignore_reply=True,
 
339
 
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
341
 
            self.proxy.Set(client_interface, "Enabled", False,
 
343
 
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
345
 
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
346
 
                               dbus_interface=client_interface,
 
349
 
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
350
 
                               dbus_interface=client_interface,
 
352
 
        elif key == "R" or key == "_" or key == "ctrl k":
 
353
 
            self.server_proxy_object.RemoveClient(self.proxy
 
357
 
            self.proxy.Set(client_interface, "CheckerRunning",
 
358
 
                           dbus.Boolean(True), ignore_reply=True,
 
359
 
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
361
 
            self.proxy.Set(client_interface, "CheckerRunning",
 
362
 
                           dbus.Boolean(False), ignore_reply=True,
 
363
 
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
365
 
            self.proxy.CheckedOK(dbus_interface=client_interface,
 
368
 
#         elif key == "p" or key == "=":
 
370
 
#         elif key == "u" or key == ":":
 
371
 
#             self.proxy.unpause()
 
377
 
    def properties_changed(self, interface, properties, invalidated):
 
378
 
        """Call self.update() if any properties changed.
 
379
 
        This overrides the method from MandosClientPropertyCache"""
 
380
 
        old_values = {key: self.properties.get(key)
 
381
 
                      for key in properties.keys()}
 
382
 
        super(MandosClientWidget, self).properties_changed(
 
383
 
            interface, properties, invalidated)
 
384
 
        if any(old_values[key] != self.properties.get(key)
 
385
 
               for key in old_values):
 
389
 
class ConstrainedListBox(urwid.ListBox):
 
390
 
    """Like a normal urwid.ListBox, but will consume all "up" or
 
391
 
    "down" key presses, thus not allowing any containing widgets to
 
392
 
    use them as an excuse to shift focus away from this widget.
 
394
 
    def keypress(self, *args, **kwargs):
 
395
 
        ret = (super(ConstrainedListBox, self)
 
396
 
               .keypress(*args, **kwargs))
 
397
 
        if ret in ("up", "down"):
 
402
 
class UserInterface(object):
 
403
 
    """This is the entire user interface - the whole screen
 
404
 
    with boxes, lists of client widgets, etc.
 
406
 
    def __init__(self, max_log_length=1000, log_level=1):
 
407
 
        DBusGMainLoop(set_as_default=True)
 
409
 
        self.screen = urwid.curses_display.Screen()
 
411
 
        self.screen.register_palette((
 
413
 
                 "default", "default", None),
 
415
 
                 "bold", "default", "bold"),
 
417
 
                 "underline,blink", "default", "underline,blink"),
 
419
 
                 "standout", "default", "standout"),
 
420
 
                ("bold-underline-blink",
 
421
 
                 "bold,underline,blink", "default",
 
422
 
                 "bold,underline,blink"),
 
424
 
                 "bold,standout", "default", "bold,standout"),
 
425
 
                ("underline-blink-standout",
 
426
 
                 "underline,blink,standout", "default",
 
427
 
                 "underline,blink,standout"),
 
428
 
                ("bold-underline-blink-standout",
 
429
 
                 "bold,underline,blink,standout", "default",
 
430
 
                 "bold,underline,blink,standout"),
 
433
 
        if urwid.supports_unicode():
 
434
 
            self.divider = "─"  # \u2500
 
436
 
            self.divider = "_"  # \u005f
 
440
 
        self.size = self.screen.get_cols_rows()
 
442
 
        self.clients = urwid.SimpleListWalker([])
 
443
 
        self.clients_dict = {}
 
445
 
        # We will add Text widgets to this list
 
447
 
        self.max_log_length = max_log_length
 
449
 
        self.log_level = log_level
 
451
 
        # We keep a reference to the log widget so we can remove it
 
452
 
        # from the ListWalker without it getting destroyed
 
453
 
        self.logbox = ConstrainedListBox(self.log)
 
455
 
        # This keeps track of whether self.uilist currently has
 
456
 
        # self.logbox in it or not
 
457
 
        self.log_visible = True
 
458
 
        self.log_wrap = "any"
 
461
 
        self.log_message_raw(("bold",
 
462
 
                              "Mandos Monitor version " + version))
 
463
 
        self.log_message_raw(("bold",
 
466
 
        self.busname = domain + '.Mandos'
 
467
 
        self.main_loop = GLib.MainLoop()
 
469
 
    def client_not_found(self, fingerprint, address):
 
470
 
        self.log_message("Client with address {} and fingerprint {}"
 
471
 
                         " could not be found"
 
472
 
                         .format(address, fingerprint))
 
475
 
        """This rebuilds the User Interface.
 
476
 
        Call this when the widget layout needs to change"""
 
478
 
        # self.uilist.append(urwid.ListBox(self.clients))
 
479
 
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
481
 
                                       # header=urwid.Divider(),
 
483
 
                                       footer=urwid.Divider(
 
484
 
                                           div_char=self.divider)))
 
486
 
            self.uilist.append(self.logbox)
 
487
 
        self.topwidget = urwid.Pile(self.uilist)
 
489
 
    def log_message(self, message, level=1):
 
490
 
        """Log message formatted with timestamp"""
 
491
 
        if level < self.log_level:
 
493
 
        timestamp = datetime.datetime.now().isoformat()
 
494
 
        self.log_message_raw("{}: {}".format(timestamp, message),
 
497
 
    def log_message_raw(self, markup, level=1):
 
498
 
        """Add a log message to the log buffer."""
 
499
 
        if level < self.log_level:
 
501
 
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
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-1]
 
505
 
        self.logbox.set_focus(len(self.logbox.body.contents),
 
509
 
    def toggle_log_display(self):
 
510
 
        """Toggle visibility of the log buffer."""
 
511
 
        self.log_visible = not self.log_visible
 
513
 
        self.log_message("Log visibility changed to: {}"
 
514
 
                         .format(self.log_visible), level=0)
 
516
 
    def change_log_display(self):
 
517
 
        """Change type of log display.
 
518
 
        Currently, this toggles wrapping of text lines."""
 
519
 
        if self.log_wrap == "clip":
 
520
 
            self.log_wrap = "any"
 
522
 
            self.log_wrap = "clip"
 
523
 
        for textwidget in self.log:
 
524
 
            textwidget.set_wrap_mode(self.log_wrap)
 
525
 
        self.log_message("Wrap mode: {}".format(self.log_wrap),
 
528
 
    def find_and_remove_client(self, path, interfaces):
 
529
 
        """Find a client by its object path and remove it.
 
531
 
        This is connected to the InterfacesRemoved signal from the
 
532
 
        Mandos server object."""
 
533
 
        if client_interface not in interfaces:
 
534
 
            # Not a Mandos client object; ignore
 
537
 
            client = self.clients_dict[path]
 
540
 
            self.log_message("Unknown client {!r} removed"
 
545
 
    def add_new_client(self, path, ifs_and_props):
 
546
 
        """Find a client by its object path and remove it.
 
548
 
        This is connected to the InterfacesAdded signal from the
 
549
 
        Mandos server object.
 
551
 
        if client_interface not in ifs_and_props:
 
552
 
            # Not a Mandos client object; ignore
 
554
 
        client_proxy_object = self.bus.get_object(self.busname, path)
 
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
 
            logger=self.log_message,
 
561
 
            properties=dict(ifs_and_props[client_interface])),
 
564
 
    def add_client(self, client, path=None):
 
565
 
        self.clients.append(client)
 
567
 
            path = client.proxy.object_path
 
568
 
        self.clients_dict[path] = client
 
569
 
        self.clients.sort(key=lambda c: c.properties["Name"])
 
572
 
    def remove_client(self, client, path=None):
 
573
 
        self.clients.remove(client)
 
575
 
            path = client.proxy.object_path
 
576
 
        del self.clients_dict[path]
 
580
 
        """Redraw the screen"""
 
581
 
        canvas = self.topwidget.render(self.size, focus=True)
 
582
 
        self.screen.draw_screen(self.size, canvas)
 
585
 
        """Start the main loop and exit when it's done."""
 
586
 
        self.bus = dbus.SystemBus()
 
587
 
        mandos_dbus_objc = self.bus.get_object(
 
588
 
            self.busname, "/", follow_name_owner_changes=True)
 
589
 
        self.mandos_serv = dbus.Interface(
 
590
 
            mandos_dbus_objc, dbus_interface=server_interface)
 
592
 
            mandos_clients = (self.mandos_serv
 
593
 
                              .GetAllClientsWithProperties())
 
594
 
            if not mandos_clients:
 
595
 
                self.log_message_raw(("bold",
 
596
 
                                      "Note: Server has no clients."))
 
597
 
        except dbus.exceptions.DBusException:
 
598
 
            self.log_message_raw(("bold",
 
599
 
                                  "Note: No Mandos server running."))
 
600
 
            mandos_clients = dbus.Dictionary()
 
603
 
         .connect_to_signal("InterfacesRemoved",
 
604
 
                            self.find_and_remove_client,
 
605
 
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
608
 
         .connect_to_signal("InterfacesAdded",
 
610
 
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
613
 
         .connect_to_signal("ClientNotFound",
 
614
 
                            self.client_not_found,
 
615
 
                            dbus_interface=server_interface,
 
617
 
        for path, client in mandos_clients.items():
 
618
 
            client_proxy_object = self.bus.get_object(self.busname,
 
620
 
            self.add_client(MandosClientWidget(
 
621
 
                server_proxy_object=self.mandos_serv,
 
622
 
                proxy_object=client_proxy_object,
 
624
 
                update_hook=self.refresh,
 
625
 
                delete_hook=self.remove_client,
 
626
 
                logger=self.log_message),
 
630
 
        self._input_callback_tag = (GLib.io_add_watch
 
635
 
        # Main loop has finished, we should close everything now
 
636
 
        GLib.source_remove(self._input_callback_tag)
 
640
 
        self.main_loop.quit()
 
642
 
    def process_input(self, source, condition):
 
643
 
        keys = self.screen.get_input()
 
644
 
        translations = {"ctrl n": "down",       # Emacs
 
645
 
                        "ctrl p": "up",         # Emacs
 
646
 
                        "ctrl v": "page down",  # Emacs
 
647
 
                        "meta v": "page up",    # Emacs
 
648
 
                        " ": "page down",       # less
 
649
 
                        "f": "page down",       # less
 
650
 
                        "b": "page up",         # less
 
656
 
                key = translations[key]
 
657
 
            except KeyError:    # :-)
 
660
 
            if key == "q" or key == "Q":
 
663
 
            elif key == "window resize":
 
664
 
                self.size = self.screen.get_cols_rows()
 
666
 
            elif key == "ctrl l":
 
669
 
            elif key == "l" or key == "D":
 
670
 
                self.toggle_log_display()
 
672
 
            elif key == "w" or key == "i":
 
673
 
                self.change_log_display()
 
675
 
            elif key == "?" or key == "f1" or key == "esc":
 
676
 
                if not self.log_visible:
 
677
 
                    self.log_visible = True
 
679
 
                self.log_message_raw(("bold",
 
683
 
                                            "l: Log window toggle",
 
684
 
                                            "TAB: Switch window",
 
685
 
                                            "w: Wrap (log lines)",
 
686
 
                                            "v: Toggle verbose log",
 
688
 
                self.log_message_raw(("bold",
 
694
 
                                             "s: Start new checker",
 
701
 
                if self.topwidget.get_focus() is self.logbox:
 
702
 
                    self.topwidget.set_focus(0)
 
704
 
                    self.topwidget.set_focus(self.logbox)
 
707
 
                if self.log_level == 0:
 
709
 
                    self.log_message("Verbose mode: Off")
 
712
 
                    self.log_message("Verbose mode: On")
 
713
 
            # elif (key == "end" or key == "meta >" or key == "G"
 
715
 
            #     pass            # xxx end-of-buffer
 
716
 
            # elif (key == "home" or key == "meta <" or key == "g"
 
718
 
            #     pass            # xxx beginning-of-buffer
 
719
 
            # elif key == "ctrl e" or key == "$":
 
720
 
            #     pass            # xxx move-end-of-line
 
721
 
            # elif key == "ctrl a" or key == "^":
 
722
 
            #     pass            # xxx move-beginning-of-line
 
723
 
            # elif key == "ctrl b" or key == "meta (" or key == "h":
 
725
 
            # elif key == "ctrl f" or key == "meta )" or key == "l":
 
728
 
            #     pass            # scroll up log
 
730
 
            #     pass            # scroll down log
 
731
 
            elif self.topwidget.selectable():
 
732
 
                self.topwidget.keypress(self.size, key)
 
740
 
except KeyboardInterrupt:
 
742
 
except Exception as e:
 
743
 
    ui.log_message(str(e))