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mandos-monitor
 
1
#!/usr/bin/python
 
2
# -*- mode: python; coding: utf-8 -*-
 
3
 
 
4
from __future__ import division, absolute_import, with_statement
 
5
 
 
6
import sys
 
7
import os
 
8
import signal
 
9
 
 
10
import datetime
 
11
 
 
12
import urwid.curses_display
 
13
import urwid
 
14
 
 
15
from dbus.mainloop.glib import DBusGMainLoop
 
16
import gobject
 
17
 
 
18
import dbus
 
19
 
 
20
import UserList
 
21
 
 
22
import locale
 
23
 
 
24
locale.setlocale(locale.LC_ALL, u'')
 
25
 
 
26
# Some useful constants
 
27
domain = 'se.bsnet.fukt'
 
28
server_interface = domain + '.Mandos'
 
29
client_interface = domain + '.Mandos.Client'
 
30
version = "1.0.14"
 
31
 
 
32
# Always run in monochrome mode
 
33
urwid.curses_display.curses.has_colors = lambda : False
 
34
 
 
35
# Urwid doesn't support blinking, but we want it.  Since we have no
 
36
# use for underline on its own, we make underline also always blink.
 
37
urwid.curses_display.curses.A_UNDERLINE |= (
 
38
    urwid.curses_display.curses.A_BLINK)
 
39
 
 
40
def isoformat_to_datetime(iso):
 
41
    "Parse an ISO 8601 date string to a datetime.datetime()"
 
42
    if not iso:
 
43
        return None
 
44
    d, t = iso.split(u"T", 1)
 
45
    year, month, day = d.split(u"-", 2)
 
46
    hour, minute, second = t.split(u":", 2)
 
47
    second, fraction = divmod(float(second), 1)
 
48
    return datetime.datetime(int(year),
 
49
                             int(month),
 
50
                             int(day),
 
51
                             int(hour),
 
52
                             int(minute),
 
53
                             int(second),           # Whole seconds
 
54
                             int(fraction*1000000)) # Microseconds
 
55
 
 
56
class MandosClientPropertyCache(object):
 
57
    """This wraps a Mandos Client D-Bus proxy object, caches the
 
58
    properties and calls a hook function when any of them are
 
59
    changed.
 
60
    """
 
61
    def __init__(self, proxy_object=None, *args, **kwargs):
 
62
        self.proxy = proxy_object # Mandos Client proxy object
 
63
        
 
64
        self.properties = dict()
 
65
        self.proxy.connect_to_signal(u"PropertyChanged",
 
66
                                     self.property_changed,
 
67
                                     client_interface,
 
68
                                     byte_arrays=True)
 
69
        
 
70
        self.properties.update(
 
71
            self.proxy.GetAll(client_interface,
 
72
                              dbus_interface = dbus.PROPERTIES_IFACE))
 
73
        super(MandosClientPropertyCache, self).__init__(
 
74
            proxy_object=proxy_object, *args, **kwargs)
 
75
    
 
76
    def property_changed(self, property=None, value=None):
 
77
        """This is called whenever we get a PropertyChanged signal
 
78
        It updates the changed property in the "properties" dict.
 
79
        """
 
80
        # Update properties dict with new value
 
81
        self.properties[property] = value
 
82
 
 
83
 
 
84
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
 
85
    """A Mandos Client which is visible on the screen.
 
86
    """
 
87
    
 
88
    def __init__(self, server_proxy_object=None, update_hook=None,
 
89
                 delete_hook=None, logger=None, *args, **kwargs):
 
90
        # Called on update
 
91
        self.update_hook = update_hook
 
92
        # Called on delete
 
93
        self.delete_hook = delete_hook
 
94
        # Mandos Server proxy object
 
95
        self.server_proxy_object = server_proxy_object
 
96
        # Logger
 
97
        self.logger = logger
 
98
        
 
99
        self._update_timer_callback_tag = None
 
100
        self.last_checker_failed = False
 
101
        
 
102
        # The widget shown normally
 
103
        self._text_widget = urwid.Text(u"")
 
104
        # The widget shown when we have focus
 
105
        self._focus_text_widget = urwid.Text(u"")
 
106
        super(MandosClientWidget, self).__init__(
 
107
            update_hook=update_hook, delete_hook=delete_hook,
 
108
            *args, **kwargs)
 
109
        self.update()
 
110
        self.opened = False
 
111
        self.proxy.connect_to_signal(u"CheckerCompleted",
 
112
                                     self.checker_completed,
 
113
                                     client_interface,
 
114
                                     byte_arrays=True)
 
115
        self.proxy.connect_to_signal(u"CheckerStarted",
 
116
                                     self.checker_started,
 
117
                                     client_interface,
 
118
                                     byte_arrays=True)
 
119
        self.proxy.connect_to_signal(u"GotSecret",
 
120
                                     self.got_secret,
 
121
                                     client_interface,
 
122
                                     byte_arrays=True)
 
123
        self.proxy.connect_to_signal(u"Rejected",
 
124
                                     self.rejected,
 
125
                                     client_interface,
 
126
                                     byte_arrays=True)
 
127
        last_checked_ok = isoformat_to_datetime(self.properties
 
128
                                                ["last_checked_ok"])
 
129
        if last_checked_ok is None:
 
130
            self.last_checker_failed = True
 
131
        else:
 
132
            self.last_checker_failed = ((datetime.datetime.utcnow()
 
133
                                         - last_checked_ok)
 
134
                                        > datetime.timedelta
 
135
                                        (milliseconds=
 
136
                                         self.properties["interval"]))
 
137
        if self.last_checker_failed:
 
138
            self._update_timer_callback_tag = (gobject.timeout_add
 
139
                                               (1000,
 
140
                                                self.update_timer))
 
141
    
 
142
    def checker_completed(self, exitstatus, condition, command):
 
143
        if exitstatus == 0:
 
144
            if self.last_checker_failed:
 
145
                self.last_checker_failed = False
 
146
                gobject.source_remove(self._update_timer_callback_tag)
 
147
                self._update_timer_callback_tag = None
 
148
            self.logger(u'Checker for client %s (command "%s")'
 
149
                        u' was successful'
 
150
                        % (self.properties[u"name"], command))
 
151
            self.update()
 
152
            return
 
153
        # Checker failed
 
154
        if not self.last_checker_failed:
 
155
            self.last_checker_failed = True
 
156
            self._update_timer_callback_tag = (gobject.timeout_add
 
157
                                               (1000,
 
158
                                                self.update_timer))
 
159
        if os.WIFEXITED(condition):
 
160
            self.logger(u'Checker for client %s (command "%s")'
 
161
                        u' failed with exit code %s'
 
162
                        % (self.properties[u"name"], command,
 
163
                           os.WEXITSTATUS(condition)))
 
164
        elif os.WIFSIGNALED(condition):
 
165
            self.logger(u'Checker for client %s (command "%s")'
 
166
                        u' was killed by signal %s'
 
167
                        % (self.properties[u"name"], command,
 
168
                           os.WTERMSIG(condition)))
 
169
        elif os.WCOREDUMP(condition):
 
170
            self.logger(u'Checker for client %s (command "%s")'
 
171
                        u' dumped core'
 
172
                        % (self.properties[u"name"], command))
 
173
        else:
 
174
            self.logger(u'Checker for client %s completed mysteriously')
 
175
        self.update()
 
176
    
 
177
    def checker_started(self, command):
 
178
        self.logger(u'Client %s started checker "%s"'
 
179
                    % (self.properties[u"name"], unicode(command)))
 
180
    
 
181
    def got_secret(self):
 
182
        self.logger(u'Client %s received its secret'
 
183
                    % self.properties[u"name"])
 
184
    
 
185
    def rejected(self):
 
186
        self.logger(u'Client %s was rejected'
 
187
                    % self.properties[u"name"])
 
188
    
 
189
    def selectable(self):
 
190
        """Make this a "selectable" widget.
 
191
        This overrides the method from urwid.FlowWidget."""
 
192
        return True
 
193
    
 
194
    def rows(self, (maxcol,), focus=False):
 
195
        """How many rows this widget will occupy might depend on
 
196
        whether we have focus or not.
 
197
        This overrides the method from urwid.FlowWidget"""
 
198
        return self.current_widget(focus).rows((maxcol,), focus=focus)
 
199
    
 
200
    def current_widget(self, focus=False):
 
201
        if focus or self.opened:
 
202
            return self._focus_widget
 
203
        return self._widget
 
204
    
 
205
    def update(self):
 
206
        "Called when what is visible on the screen should be updated."
 
207
        # How to add standout mode to a style
 
208
        with_standout = { u"normal": u"standout",
 
209
                          u"bold": u"bold-standout",
 
210
                          u"underline-blink":
 
211
                              u"underline-blink-standout",
 
212
                          u"bold-underline-blink":
 
213
                              u"bold-underline-blink-standout",
 
214
                          }
 
215
        
 
216
        # Rebuild focus and non-focus widgets using current properties
 
217
        self._text = (u'%(name)s: %(enabled)s%(timer)s'
 
218
                      % { u"name": self.properties[u"name"],
 
219
                          u"enabled":
 
220
                              (u"enabled"
 
221
                               if self.properties[u"enabled"]
 
222
                               else u"DISABLED"),
 
223
                          u"timer": (unicode(datetime.timedelta
 
224
                                             (milliseconds =
 
225
                                              self.properties
 
226
                                              [u"timeout"])
 
227
                                             - (datetime.datetime
 
228
                                                .utcnow()
 
229
                                                - isoformat_to_datetime
 
230
                                                (max((self.properties
 
231
                                                 ["last_checked_ok"]
 
232
                                                 or
 
233
                                                 self.properties
 
234
                                                 ["created"]),
 
235
                                                    self.properties[u"last_enabled"]))))
 
236
                                     if (self.last_checker_failed
 
237
                                         and self.properties
 
238
                                         [u"enabled"])
 
239
                                     else u"")})
 
240
        if not urwid.supports_unicode():
 
241
            self._text = self._text.encode("ascii", "replace")
 
242
        textlist = [(u"normal", self._text)]
 
243
        self._text_widget.set_text(textlist)
 
244
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
245
                                           text[1])
 
246
                                          if isinstance(text, tuple)
 
247
                                          else text
 
248
                                          for text in textlist])
 
249
        self._widget = self._text_widget
 
250
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
251
                                            "standout")
 
252
        # Run update hook, if any
 
253
        if self.update_hook is not None:
 
254
            self.update_hook()
 
255
    
 
256
    def update_timer(self):
 
257
        "called by gobject"
 
258
        self.update()
 
259
        return True             # Keep calling this
 
260
    
 
261
    def delete(self):
 
262
        if self._update_timer_callback_tag is not None:
 
263
            gobject.source_remove(self._update_timer_callback_tag)
 
264
            self._update_timer_callback_tag = None
 
265
        if self.delete_hook is not None:
 
266
            self.delete_hook(self)
 
267
    
 
268
    def render(self, (maxcol,), focus=False):
 
269
        """Render differently if we have focus.
 
270
        This overrides the method from urwid.FlowWidget"""
 
271
        return self.current_widget(focus).render((maxcol,),
 
272
                                                 focus=focus)
 
273
    
 
274
    def keypress(self, (maxcol,), key):
 
275
        """Handle keys.
 
276
        This overrides the method from urwid.FlowWidget"""
 
277
        if key == u"e" or key == u"+":
 
278
            self.proxy.Enable()
 
279
        elif key == u"d" or key == u"-":
 
280
            self.proxy.Disable()
 
281
        elif key == u"r" or key == u"_" or key == u"ctrl k":
 
282
            self.server_proxy_object.RemoveClient(self.proxy
 
283
                                                  .object_path)
 
284
        elif key == u"s":
 
285
            self.proxy.StartChecker()
 
286
        elif key == u"S":
 
287
            self.proxy.StopChecker()
 
288
        elif key == u"C":
 
289
            self.proxy.CheckedOK()
 
290
        # xxx
 
291
#         elif key == u"p" or key == "=":
 
292
#             self.proxy.pause()
 
293
#         elif key == u"u" or key == ":":
 
294
#             self.proxy.unpause()
 
295
#         elif key == u"RET":
 
296
#             self.open()
 
297
        else:
 
298
            return key
 
299
    
 
300
    def property_changed(self, property=None, value=None,
 
301
                         *args, **kwargs):
 
302
        """Call self.update() if old value is not new value.
 
303
        This overrides the method from MandosClientPropertyCache"""
 
304
        property_name = unicode(property)
 
305
        old_value = self.properties.get(property_name)
 
306
        super(MandosClientWidget, self).property_changed(
 
307
            property=property, value=value, *args, **kwargs)
 
308
        if self.properties.get(property_name) != old_value:
 
309
            self.update()
 
310
 
 
311
 
 
312
class ConstrainedListBox(urwid.ListBox):
 
313
    """Like a normal urwid.ListBox, but will consume all "up" or
 
314
    "down" key presses, thus not allowing any containing widgets to
 
315
    use them as an excuse to shift focus away from this widget.
 
316
    """
 
317
    def keypress(self, (maxcol, maxrow), key):
 
318
        ret = super(ConstrainedListBox, self).keypress((maxcol, maxrow), key)
 
319
        if ret in (u"up", u"down"):
 
320
            return
 
321
        return ret
 
322
 
 
323
 
 
324
class UserInterface(object):
 
325
    """This is the entire user interface - the whole screen
 
326
    with boxes, lists of client widgets, etc.
 
327
    """
 
328
    def __init__(self, max_log_length=1000):
 
329
        DBusGMainLoop(set_as_default=True)
 
330
        
 
331
        self.screen = urwid.curses_display.Screen()
 
332
        
 
333
        self.screen.register_palette((
 
334
                (u"normal",
 
335
                 u"default", u"default", None),
 
336
                (u"bold",
 
337
                 u"default", u"default", u"bold"),
 
338
                (u"underline-blink",
 
339
                 u"default", u"default", u"underline"),
 
340
                (u"standout",
 
341
                 u"default", u"default", u"standout"),
 
342
                (u"bold-underline-blink",
 
343
                 u"default", u"default", (u"bold", u"underline")),
 
344
                (u"bold-standout",
 
345
                 u"default", u"default", (u"bold", u"standout")),
 
346
                (u"underline-blink-standout",
 
347
                 u"default", u"default", (u"underline", u"standout")),
 
348
                (u"bold-underline-blink-standout",
 
349
                 u"default", u"default", (u"bold", u"underline",
 
350
                                          u"standout")),
 
351
                ))
 
352
        
 
353
        if urwid.supports_unicode():
 
354
            self.divider = u"─" # \u2500
 
355
            #self.divider = u"━" # \u2501
 
356
        else:
 
357
            #self.divider = u"-" # \u002d
 
358
            self.divider = u"_" # \u005f
 
359
        
 
360
        self.screen.start()
 
361
        
 
362
        self.size = self.screen.get_cols_rows()
 
363
        
 
364
        self.clients = urwid.SimpleListWalker([])
 
365
        self.clients_dict = {}
 
366
        
 
367
        # We will add Text widgets to this list
 
368
        self.log = []
 
369
        self.max_log_length = max_log_length
 
370
        
 
371
        # We keep a reference to the log widget so we can remove it
 
372
        # from the ListWalker without it getting destroyed
 
373
        self.logbox = ConstrainedListBox(self.log)
 
374
        
 
375
        # This keeps track of whether self.uilist currently has
 
376
        # self.logbox in it or not
 
377
        self.log_visible = True
 
378
        self.log_wrap = u"any"
 
379
        
 
380
        self.rebuild()
 
381
        self.log_message_raw((u"bold",
 
382
                              u"Mandos Monitor version " + version))
 
383
        self.log_message_raw((u"bold",
 
384
                              u"q: Quit  ?: Help"))
 
385
        
 
386
        self.busname = domain + '.Mandos'
 
387
        self.main_loop = gobject.MainLoop()
 
388
        self.bus = dbus.SystemBus()
 
389
        mandos_dbus_objc = self.bus.get_object(
 
390
            self.busname, u"/", follow_name_owner_changes=True)
 
391
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
 
392
                                          dbus_interface
 
393
                                          = server_interface)
 
394
        try:
 
395
            mandos_clients = (self.mandos_serv
 
396
                              .GetAllClientsWithProperties())
 
397
        except dbus.exceptions.DBusException:
 
398
            mandos_clients = dbus.Dictionary()
 
399
        
 
400
        (self.mandos_serv
 
401
         .connect_to_signal(u"ClientRemoved",
 
402
                            self.find_and_remove_client,
 
403
                            dbus_interface=server_interface,
 
404
                            byte_arrays=True))
 
405
        (self.mandos_serv
 
406
         .connect_to_signal(u"ClientAdded",
 
407
                            self.add_new_client,
 
408
                            dbus_interface=server_interface,
 
409
                            byte_arrays=True))
 
410
        (self.mandos_serv
 
411
         .connect_to_signal(u"ClientNotFound",
 
412
                            self.client_not_found,
 
413
                            dbus_interface=server_interface,
 
414
                            byte_arrays=True))
 
415
        for path, client in mandos_clients.iteritems():
 
416
            client_proxy_object = self.bus.get_object(self.busname,
 
417
                                                      path)
 
418
            self.add_client(MandosClientWidget(server_proxy_object
 
419
                                               =self.mandos_serv,
 
420
                                               proxy_object
 
421
                                               =client_proxy_object,
 
422
                                               properties=client,
 
423
                                               update_hook
 
424
                                               =self.refresh,
 
425
                                               delete_hook
 
426
                                               =self.remove_client,
 
427
                                               logger
 
428
                                               =self.log_message),
 
429
                            path=path)
 
430
    
 
431
    def client_not_found(self, fingerprint, address):
 
432
        self.log_message((u"Client with address %s and fingerprint %s"
 
433
                          u" could not be found" % (address,
 
434
                                                    fingerprint)))
 
435
    
 
436
    def rebuild(self):
 
437
        """This rebuilds the User Interface.
 
438
        Call this when the widget layout needs to change"""
 
439
        self.uilist = []
 
440
        #self.uilist.append(urwid.ListBox(self.clients))
 
441
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.clients),
 
442
                                       #header=urwid.Divider(),
 
443
                                       header=None,
 
444
                                       footer=urwid.Divider(div_char=self.divider)))
 
445
        if self.log_visible:
 
446
            self.uilist.append(self.logbox)
 
447
            pass
 
448
        self.topwidget = urwid.Pile(self.uilist)
 
449
    
 
450
    def log_message(self, message):
 
451
        timestamp = datetime.datetime.now().isoformat()
 
452
        self.log_message_raw(timestamp + u": " + message)
 
453
    
 
454
    def log_message_raw(self, markup):
 
455
        """Add a log message to the log buffer."""
 
456
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
457
        if (self.max_log_length
 
458
            and len(self.log) > self.max_log_length):
 
459
            del self.log[0:len(self.log)-self.max_log_length-1]
 
460
        self.logbox.set_focus(len(self.logbox.body.contents),
 
461
                              coming_from=u"above")
 
462
        self.refresh()
 
463
    
 
464
    def toggle_log_display(self):
 
465
        """Toggle visibility of the log buffer."""
 
466
        self.log_visible = not self.log_visible
 
467
        self.rebuild()
 
468
        self.log_message(u"Log visibility changed to: "
 
469
                         + unicode(self.log_visible))
 
470
    
 
471
    def change_log_display(self):
 
472
        """Change type of log display.
 
473
        Currently, this toggles wrapping of text lines."""
 
474
        if self.log_wrap == u"clip":
 
475
            self.log_wrap = u"any"
 
476
        else:
 
477
            self.log_wrap = u"clip"
 
478
        for textwidget in self.log:
 
479
            textwidget.set_wrap_mode(self.log_wrap)
 
480
        self.log_message(u"Wrap mode: " + self.log_wrap)
 
481
    
 
482
    def find_and_remove_client(self, path, name):
 
483
        """Find an client from its object path and remove it.
 
484
        
 
485
        This is connected to the ClientRemoved signal from the
 
486
        Mandos server object."""
 
487
        try:
 
488
            client = self.clients_dict[path]
 
489
        except KeyError:
 
490
            # not found?
 
491
            return
 
492
        self.remove_client(client, path)
 
493
    
 
494
    def add_new_client(self, path):
 
495
        client_proxy_object = self.bus.get_object(self.busname, path)
 
496
        self.add_client(MandosClientWidget(server_proxy_object
 
497
                                           =self.mandos_serv,
 
498
                                           proxy_object
 
499
                                           =client_proxy_object,
 
500
                                           update_hook
 
501
                                           =self.refresh,
 
502
                                           delete_hook
 
503
                                           =self.remove_client,
 
504
                                           logger
 
505
                                           =self.log_message),
 
506
                        path=path)
 
507
    
 
508
    def add_client(self, client, path=None):
 
509
        self.clients.append(client)
 
510
        if path is None:
 
511
            path = client.proxy.object_path
 
512
        self.clients_dict[path] = client
 
513
        self.clients.sort(None, lambda c: c.properties[u"name"])
 
514
        self.refresh()
 
515
    
 
516
    def remove_client(self, client, path=None):
 
517
        self.clients.remove(client)
 
518
        if path is None:
 
519
            path = client.proxy.object_path
 
520
        del self.clients_dict[path]
 
521
        if not self.clients_dict:
 
522
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
 
523
            # is completely emptied, we need to recreate it.
 
524
            self.clients = urwid.SimpleListWalker([])
 
525
            self.rebuild()
 
526
        self.refresh()
 
527
    
 
528
    def refresh(self):
 
529
        """Redraw the screen"""
 
530
        canvas = self.topwidget.render(self.size, focus=True)
 
531
        self.screen.draw_screen(self.size, canvas)
 
532
    
 
533
    def run(self):
 
534
        """Start the main loop and exit when it's done."""
 
535
        self.refresh()
 
536
        self._input_callback_tag = (gobject.io_add_watch
 
537
                                    (sys.stdin.fileno(),
 
538
                                     gobject.IO_IN,
 
539
                                     self.process_input))
 
540
        self.main_loop.run()
 
541
        # Main loop has finished, we should close everything now
 
542
        gobject.source_remove(self._input_callback_tag)
 
543
        self.screen.stop()
 
544
    
 
545
    def stop(self):
 
546
        self.main_loop.quit()
 
547
    
 
548
    def process_input(self, source, condition):
 
549
        keys = self.screen.get_input()
 
550
        translations = { u"ctrl n": u"down",      # Emacs
 
551
                         u"ctrl p": u"up",        # Emacs
 
552
                         u"ctrl v": u"page down", # Emacs
 
553
                         u"meta v": u"page up",   # Emacs
 
554
                         u" ": u"page down",      # less
 
555
                         u"f": u"page down",      # less
 
556
                         u"b": u"page up",        # less
 
557
                         u"j": u"down",           # vi
 
558
                         u"k": u"up",             # vi
 
559
                         }
 
560
        for key in keys:
 
561
            try:
 
562
                key = translations[key]
 
563
            except KeyError:    # :-)
 
564
                pass
 
565
            
 
566
            if key == u"q" or key == u"Q":
 
567
                self.stop()
 
568
                break
 
569
            elif key == u"window resize":
 
570
                self.size = self.screen.get_cols_rows()
 
571
                self.refresh()
 
572
            elif key == u"\f":  # Ctrl-L
 
573
                self.refresh()
 
574
            elif key == u"l" or key == u"D":
 
575
                self.toggle_log_display()
 
576
                self.refresh()
 
577
            elif key == u"w" or key == u"i":
 
578
                self.change_log_display()
 
579
                self.refresh()
 
580
            elif key == u"?" or key == u"f1" or key == u"esc":
 
581
                if not self.log_visible:
 
582
                    self.log_visible = True
 
583
                    self.rebuild()
 
584
                self.log_message_raw((u"bold",
 
585
                                      u"  ".
 
586
                                      join((u"q: Quit",
 
587
                                            u"?: Help",
 
588
                                            u"l: Log window toggle",
 
589
                                            u"TAB: Switch window",
 
590
                                            u"w: Wrap (log)"))))
 
591
                self.log_message_raw((u"bold",
 
592
                                      u"  "
 
593
                                      .join((u"Clients:",
 
594
                                             u"e: Enable",
 
595
                                             u"d: Disable",
 
596
                                             u"r: Remove",
 
597
                                             u"s: Start new checker",
 
598
                                             u"S: Stop checker",
 
599
                                             u"C: Checker OK"))))
 
600
                self.refresh()
 
601
            elif key == u"tab":
 
602
                if self.topwidget.get_focus() is self.logbox:
 
603
                    self.topwidget.set_focus(0)
 
604
                else:
 
605
                    self.topwidget.set_focus(self.logbox)
 
606
                self.refresh()
 
607
            #elif (key == u"end" or key == u"meta >" or key == u"G"
 
608
            #      or key == u">"):
 
609
            #    pass            # xxx end-of-buffer
 
610
            #elif (key == u"home" or key == u"meta <" or key == u"g"
 
611
            #      or key == u"<"):
 
612
            #    pass            # xxx beginning-of-buffer
 
613
            #elif key == u"ctrl e" or key == u"$":
 
614
            #    pass            # xxx move-end-of-line
 
615
            #elif key == u"ctrl a" or key == u"^":
 
616
            #    pass            # xxx move-beginning-of-line
 
617
            #elif key == u"ctrl b" or key == u"meta (" or key == u"h":
 
618
            #    pass            # xxx left
 
619
            #elif key == u"ctrl f" or key == u"meta )" or key == u"l":
 
620
            #    pass            # xxx right
 
621
            #elif key == u"a":
 
622
            #    pass            # scroll up log
 
623
            #elif key == u"z":
 
624
            #    pass            # scroll down log
 
625
            elif self.topwidget.selectable():
 
626
                self.topwidget.keypress(self.size, key)
 
627
                self.refresh()
 
628
        return True
 
629
 
 
630
ui = UserInterface()
 
631
try:
 
632
    ui.run()
 
633
except Exception, e:
 
634
    ui.log_message(unicode(e))
 
635
    ui.screen.stop()
 
636
    raise