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  • Committer: teddy at bsnet
  • Date: 2011-02-11 18:54:14 UTC
  • mto: (237.7.13 mandos)
  • mto: This revision was merged to the branch mainline in revision 282.
  • Revision ID: teddy@fukt.bsnet.se-20110211185414-cjmw3hppv9i3h9wh
* mandos-monitor: Use only unicode string literals.
  (MandosClientWidget.rows, MandosClientWidget.render,
  MandosClientWidget.keypress, ConstrainedListBox.keypress) Don't use
                                                            argument
                                                            tuple
                                                            unpacking.

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