/mandos/trunk

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

« back to all changes in this revision

Viewing changes to mandos-monitor

  • Committer: Teddy Hogeborn
  • Date: 2014-05-11 20:09:27 UTC
  • Revision ID: teddy@recompile.se-20140511200927-oz7hxlvaj4ufujn1
Do not depend on new version of avahi-daemon or systemd.

* debian/control (Package: mandos/Depends:): Remove the dependency on
  "avahi-daemon (>= 0.6.31-3) | systemd-sysv".  It is unnecessary
  since we have a workaround in debian/mandos.postinst anyway.

Show diffs side-by-side

added added

removed removed

Lines of Context:
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 © 2009-2014 Teddy Hogeborn
 
7
# Copyright © 2009-2014 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
 
21
# <http://www.gnu.org/licenses/>.
 
22
# 
 
23
# Contact the authors at <mandos@recompile.se>.
 
24
# 
 
25
 
 
26
from __future__ import (division, absolute_import, print_function,
 
27
                        unicode_literals)
 
28
try:
 
29
    from future_builtins import *
 
30
except ImportError:
 
31
    pass
 
32
 
 
33
import sys
 
34
import os
 
35
 
 
36
import datetime
 
37
 
 
38
import urwid.curses_display
 
39
import urwid
 
40
 
 
41
from dbus.mainloop.glib import DBusGMainLoop
 
42
try:
 
43
    import gobject
 
44
except ImportError:
 
45
    from gi.repository import GObject as gobject
 
46
 
 
47
import dbus
 
48
 
 
49
import locale
 
50
 
 
51
if sys.version_info[0] == 2:
 
52
    str = unicode
 
53
 
 
54
locale.setlocale(locale.LC_ALL, '')
 
55
 
 
56
import logging
 
57
logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
 
58
 
 
59
# Some useful constants
 
60
domain = 'se.recompile'
 
61
server_interface = domain + '.Mandos'
 
62
client_interface = domain + '.Mandos.Client'
 
63
version = "1.6.4"
 
64
 
 
65
def isoformat_to_datetime(iso):
 
66
    "Parse an ISO 8601 date string to a datetime.datetime()"
 
67
    if not iso:
 
68
        return None
 
69
    d, t = iso.split("T", 1)
 
70
    year, month, day = d.split("-", 2)
 
71
    hour, minute, second = t.split(":", 2)
 
72
    second, fraction = divmod(float(second), 1)
 
73
    return datetime.datetime(int(year),
 
74
                             int(month),
 
75
                             int(day),
 
76
                             int(hour),
 
77
                             int(minute),
 
78
                             int(second),           # Whole seconds
 
79
                             int(fraction*1000000)) # Microseconds
 
80
 
 
81
class MandosClientPropertyCache(object):
 
82
    """This wraps a Mandos Client D-Bus proxy object, caches the
 
83
    properties and calls a hook function when any of them are
 
84
    changed.
 
85
    """
 
86
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
87
        self.proxy = proxy_object # Mandos Client proxy object
 
88
        self.properties = dict() if properties is None else properties
 
89
        self.property_changed_match = (
 
90
            self.proxy.connect_to_signal("PropertyChanged",
 
91
                                         self._property_changed,
 
92
                                         client_interface,
 
93
                                         byte_arrays=True))
 
94
        
 
95
        if properties is None:
 
96
            self.properties.update(
 
97
                self.proxy.GetAll(client_interface,
 
98
                                  dbus_interface
 
99
                                  = dbus.PROPERTIES_IFACE))
 
100
        
 
101
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
102
    
 
103
    def _property_changed(self, property, value):
 
104
        """Helper which takes positional arguments"""
 
105
        return self.property_changed(property=property, value=value)
 
106
    
 
107
    def property_changed(self, property=None, value=None):
 
108
        """This is called whenever we get a PropertyChanged signal
 
109
        It updates the changed property in the "properties" dict.
 
110
        """
 
111
        # Update properties dict with new value
 
112
        self.properties[property] = value
 
113
    
 
114
    def delete(self):
 
115
        self.property_changed_match.remove()
 
116
 
 
117
 
 
118
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
 
119
    """A Mandos Client which is visible on the screen.
 
120
    """
 
121
    
 
122
    def __init__(self, server_proxy_object=None, update_hook=None,
 
123
                 delete_hook=None, logger=None, **kwargs):
 
124
        # Called on update
 
125
        self.update_hook = update_hook
 
126
        # Called on delete
 
127
        self.delete_hook = delete_hook
 
128
        # Mandos Server proxy object
 
129
        self.server_proxy_object = server_proxy_object
 
130
        # Logger
 
131
        self.logger = logger
 
132
        
 
133
        self._update_timer_callback_tag = None
 
134
        
 
135
        # The widget shown normally
 
136
        self._text_widget = urwid.Text("")
 
137
        # The widget shown when we have focus
 
138
        self._focus_text_widget = urwid.Text("")
 
139
        super(MandosClientWidget, self).__init__(**kwargs)
 
140
        self.update()
 
141
        self.opened = False
 
142
        
 
143
        self.match_objects = (
 
144
            self.proxy.connect_to_signal("CheckerCompleted",
 
145
                                         self.checker_completed,
 
146
                                         client_interface,
 
147
                                         byte_arrays=True),
 
148
            self.proxy.connect_to_signal("CheckerStarted",
 
149
                                         self.checker_started,
 
150
                                         client_interface,
 
151
                                         byte_arrays=True),
 
152
            self.proxy.connect_to_signal("GotSecret",
 
153
                                         self.got_secret,
 
154
                                         client_interface,
 
155
                                         byte_arrays=True),
 
156
            self.proxy.connect_to_signal("NeedApproval",
 
157
                                         self.need_approval,
 
158
                                         client_interface,
 
159
                                         byte_arrays=True),
 
160
            self.proxy.connect_to_signal("Rejected",
 
161
                                         self.rejected,
 
162
                                         client_interface,
 
163
                                         byte_arrays=True))
 
164
        #self.logger('Created client {0}'
 
165
        #            .format(self.properties["Name"]))
 
166
    
 
167
    def using_timer(self, flag):
 
168
        """Call this method with True or False when timer should be
 
169
        activated or deactivated.
 
170
        """
 
171
        if flag and self._update_timer_callback_tag is None:
 
172
            # Will update the shown timer value every second
 
173
            self._update_timer_callback_tag = (gobject.timeout_add
 
174
                                               (1000,
 
175
                                                self.update_timer))
 
176
        elif not (flag or self._update_timer_callback_tag is None):
 
177
            gobject.source_remove(self._update_timer_callback_tag)
 
178
            self._update_timer_callback_tag = None
 
179
    
 
180
    def checker_completed(self, exitstatus, condition, command):
 
181
        if exitstatus == 0:
 
182
            self.update()
 
183
            return
 
184
        # Checker failed
 
185
        if os.WIFEXITED(condition):
 
186
            self.logger('Checker for client {0} (command "{1}")'
 
187
                        ' failed with exit code {2}'
 
188
                        .format(self.properties["Name"], command,
 
189
                                os.WEXITSTATUS(condition)))
 
190
        elif os.WIFSIGNALED(condition):
 
191
            self.logger('Checker for client {0} (command "{1}") was'
 
192
                        ' killed by signal {2}'
 
193
                        .format(self.properties["Name"], command,
 
194
                                os.WTERMSIG(condition)))
 
195
        elif os.WCOREDUMP(condition):
 
196
            self.logger('Checker for client {0} (command "{1}")'
 
197
                        ' dumped core'
 
198
                        .format(self.properties["Name"], command))
 
199
        else:
 
200
            self.logger('Checker for client {0} completed'
 
201
                        ' mysteriously'
 
202
                        .format(self.properties["Name"]))
 
203
        self.update()
 
204
    
 
205
    def checker_started(self, command):
 
206
        """Server signals that a checker started. This could be useful
 
207
           to log in the future. """
 
208
        #self.logger('Client {0} started checker "{1}"'
 
209
        #            .format(self.properties["Name"],
 
210
        #                    str(command)))
 
211
        pass
 
212
    
 
213
    def got_secret(self):
 
214
        self.logger('Client {0} received its secret'
 
215
                    .format(self.properties["Name"]))
 
216
    
 
217
    def need_approval(self, timeout, default):
 
218
        if not default:
 
219
            message = 'Client {0} needs approval within {1} seconds'
 
220
        else:
 
221
            message = 'Client {0} will get its secret in {1} seconds'
 
222
        self.logger(message.format(self.properties["Name"],
 
223
                                   timeout/1000))
 
224
    
 
225
    def rejected(self, reason):
 
226
        self.logger('Client {0} was rejected; reason: {1}'
 
227
                    .format(self.properties["Name"], reason))
 
228
    
 
229
    def selectable(self):
 
230
        """Make this a "selectable" widget.
 
231
        This overrides the method from urwid.FlowWidget."""
 
232
        return True
 
233
    
 
234
    def rows(self, maxcolrow, focus=False):
 
235
        """How many rows this widget will occupy might depend on
 
236
        whether we have focus or not.
 
237
        This overrides the method from urwid.FlowWidget"""
 
238
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
239
    
 
240
    def current_widget(self, focus=False):
 
241
        if focus or self.opened:
 
242
            return self._focus_widget
 
243
        return self._widget
 
244
    
 
245
    def update(self):
 
246
        "Called when what is visible on the screen should be updated."
 
247
        # How to add standout mode to a style
 
248
        with_standout = { "normal": "standout",
 
249
                          "bold": "bold-standout",
 
250
                          "underline-blink":
 
251
                              "underline-blink-standout",
 
252
                          "bold-underline-blink":
 
253
                              "bold-underline-blink-standout",
 
254
                          }
 
255
        
 
256
        # Rebuild focus and non-focus widgets using current properties
 
257
        
 
258
        # Base part of a client. Name!
 
259
        base = '{name}: '.format(name=self.properties["Name"])
 
260
        if not self.properties["Enabled"]:
 
261
            message = "DISABLED"
 
262
            self.using_timer(False)
 
263
        elif self.properties["ApprovalPending"]:
 
264
            timeout = datetime.timedelta(milliseconds
 
265
                                         = self.properties
 
266
                                         ["ApprovalDelay"])
 
267
            last_approval_request = isoformat_to_datetime(
 
268
                self.properties["LastApprovalRequest"])
 
269
            if last_approval_request is not None:
 
270
                timer = max(timeout - (datetime.datetime.utcnow()
 
271
                                       - last_approval_request),
 
272
                            datetime.timedelta())
 
273
            else:
 
274
                timer = datetime.timedelta()
 
275
            if self.properties["ApprovedByDefault"]:
 
276
                message = "Approval in {0}. (d)eny?"
 
277
            else:
 
278
                message = "Denial in {0}. (a)pprove?"
 
279
            message = message.format(str(timer).rsplit(".", 1)[0])
 
280
            self.using_timer(True)
 
281
        elif self.properties["LastCheckerStatus"] != 0:
 
282
            # When checker has failed, show timer until client expires
 
283
            expires = self.properties["Expires"]
 
284
            if expires == "":
 
285
                timer = datetime.timedelta(0)
 
286
            else:
 
287
                expires = (datetime.datetime.strptime
 
288
                           (expires, '%Y-%m-%dT%H:%M:%S.%f'))
 
289
                timer = max(expires - datetime.datetime.utcnow(),
 
290
                            datetime.timedelta())
 
291
            message = ('A checker has failed! Time until client'
 
292
                       ' gets disabled: {0}'
 
293
                       .format(str(timer).rsplit(".", 1)[0]))
 
294
            self.using_timer(True)
 
295
        else:
 
296
            message = "enabled"
 
297
            self.using_timer(False)
 
298
        self._text = "{0}{1}".format(base, message)
 
299
        
 
300
        if not urwid.supports_unicode():
 
301
            self._text = self._text.encode("ascii", "replace")
 
302
        textlist = [("normal", self._text)]
 
303
        self._text_widget.set_text(textlist)
 
304
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
305
                                           text[1])
 
306
                                          if isinstance(text, tuple)
 
307
                                          else text
 
308
                                          for text in textlist])
 
309
        self._widget = self._text_widget
 
310
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
311
                                            "standout")
 
312
        # Run update hook, if any
 
313
        if self.update_hook is not None:
 
314
            self.update_hook()
 
315
    
 
316
    def update_timer(self):
 
317
        """called by gobject. Will indefinitely loop until
 
318
        gobject.source_remove() on tag is called"""
 
319
        self.update()
 
320
        return True             # Keep calling this
 
321
    
 
322
    def delete(self, **kwargs):
 
323
        if self._update_timer_callback_tag is not None:
 
324
            gobject.source_remove(self._update_timer_callback_tag)
 
325
            self._update_timer_callback_tag = None
 
326
        for match in self.match_objects:
 
327
            match.remove()
 
328
        self.match_objects = ()
 
329
        if self.delete_hook is not None:
 
330
            self.delete_hook(self)
 
331
        return super(MandosClientWidget, self).delete(**kwargs)
 
332
    
 
333
    def render(self, maxcolrow, focus=False):
 
334
        """Render differently if we have focus.
 
335
        This overrides the method from urwid.FlowWidget"""
 
336
        return self.current_widget(focus).render(maxcolrow,
 
337
                                                 focus=focus)
 
338
    
 
339
    def keypress(self, maxcolrow, key):
 
340
        """Handle keys.
 
341
        This overrides the method from urwid.FlowWidget"""
 
342
        if key == "+":
 
343
            self.proxy.Enable(dbus_interface = client_interface,
 
344
                              ignore_reply=True)
 
345
        elif key == "-":
 
346
            self.proxy.Disable(dbus_interface = client_interface,
 
347
                               ignore_reply=True)
 
348
        elif key == "a":
 
349
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
350
                               dbus_interface = client_interface,
 
351
                               ignore_reply=True)
 
352
        elif key == "d":
 
353
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
354
                                  dbus_interface = client_interface,
 
355
                               ignore_reply=True)
 
356
        elif key == "R" or key == "_" or key == "ctrl k":
 
357
            self.server_proxy_object.RemoveClient(self.proxy
 
358
                                                  .object_path,
 
359
                                                  ignore_reply=True)
 
360
        elif key == "s":
 
361
            self.proxy.StartChecker(dbus_interface = client_interface,
 
362
                                    ignore_reply=True)
 
363
        elif key == "S":
 
364
            self.proxy.StopChecker(dbus_interface = client_interface,
 
365
                                   ignore_reply=True)
 
366
        elif key == "C":
 
367
            self.proxy.CheckedOK(dbus_interface = client_interface,
 
368
                                 ignore_reply=True)
 
369
        # xxx
 
370
#         elif key == "p" or key == "=":
 
371
#             self.proxy.pause()
 
372
#         elif key == "u" or key == ":":
 
373
#             self.proxy.unpause()
 
374
#         elif key == "RET":
 
375
#             self.open()
 
376
        else:
 
377
            return key
 
378
    
 
379
    def property_changed(self, property=None, **kwargs):
 
380
        """Call self.update() if old value is not new value.
 
381
        This overrides the method from MandosClientPropertyCache"""
 
382
        property_name = str(property)
 
383
        old_value = self.properties.get(property_name)
 
384
        super(MandosClientWidget, self).property_changed(
 
385
            property=property, **kwargs)
 
386
        if self.properties.get(property_name) != old_value:
 
387
            self.update()
 
388
 
 
389
 
 
390
class ConstrainedListBox(urwid.ListBox):
 
391
    """Like a normal urwid.ListBox, but will consume all "up" or
 
392
    "down" key presses, thus not allowing any containing widgets to
 
393
    use them as an excuse to shift focus away from this widget.
 
394
    """
 
395
    def keypress(self, *args, **kwargs):
 
396
        ret = super(ConstrainedListBox, self).keypress(*args, **kwargs)
 
397
        if ret in ("up", "down"):
 
398
            return
 
399
        return ret
 
400
 
 
401
 
 
402
class UserInterface(object):
 
403
    """This is the entire user interface - the whole screen
 
404
    with boxes, lists of client widgets, etc.
 
405
    """
 
406
    def __init__(self, max_log_length=1000):
 
407
        DBusGMainLoop(set_as_default=True)
 
408
        
 
409
        self.screen = urwid.curses_display.Screen()
 
410
        
 
411
        self.screen.register_palette((
 
412
                ("normal",
 
413
                 "default", "default", None),
 
414
                ("bold",
 
415
                 "bold", "default", "bold"),
 
416
                ("underline-blink",
 
417
                 "underline,blink", "default", "underline,blink"),
 
418
                ("standout",
 
419
                 "standout", "default", "standout"),
 
420
                ("bold-underline-blink",
 
421
                 "bold,underline,blink", "default", "bold,underline,blink"),
 
422
                ("bold-standout",
 
423
                 "bold,standout", "default", "bold,standout"),
 
424
                ("underline-blink-standout",
 
425
                 "underline,blink,standout", "default",
 
426
                 "underline,blink,standout"),
 
427
                ("bold-underline-blink-standout",
 
428
                 "bold,underline,blink,standout", "default",
 
429
                 "bold,underline,blink,standout"),
 
430
                ))
 
431
        
 
432
        if urwid.supports_unicode():
 
433
            self.divider = "─" # \u2500
 
434
            #self.divider = "━" # \u2501
 
435
        else:
 
436
            #self.divider = "-" # \u002d
 
437
            self.divider = "_" # \u005f
 
438
        
 
439
        self.screen.start()
 
440
        
 
441
        self.size = self.screen.get_cols_rows()
 
442
        
 
443
        self.clients = urwid.SimpleListWalker([])
 
444
        self.clients_dict = {}
 
445
        
 
446
        # We will add Text widgets to this list
 
447
        self.log = []
 
448
        self.max_log_length = max_log_length
 
449
        
 
450
        # We keep a reference to the log widget so we can remove it
 
451
        # from the ListWalker without it getting destroyed
 
452
        self.logbox = ConstrainedListBox(self.log)
 
453
        
 
454
        # This keeps track of whether self.uilist currently has
 
455
        # self.logbox in it or not
 
456
        self.log_visible = True
 
457
        self.log_wrap = "any"
 
458
        
 
459
        self.rebuild()
 
460
        self.log_message_raw(("bold",
 
461
                              "Mandos Monitor version " + version))
 
462
        self.log_message_raw(("bold",
 
463
                              "q: Quit  ?: Help"))
 
464
        
 
465
        self.busname = domain + '.Mandos'
 
466
        self.main_loop = gobject.MainLoop()
 
467
    
 
468
    def client_not_found(self, fingerprint, address):
 
469
        self.log_message("Client with address {0} and fingerprint"
 
470
                         " {1} could not be found"
 
471
                         .format(address, fingerprint))
 
472
    
 
473
    def rebuild(self):
 
474
        """This rebuilds the User Interface.
 
475
        Call this when the widget layout needs to change"""
 
476
        self.uilist = []
 
477
        #self.uilist.append(urwid.ListBox(self.clients))
 
478
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
479
                                                          clients),
 
480
                                       #header=urwid.Divider(),
 
481
                                       header=None,
 
482
                                       footer=
 
483
                                       urwid.Divider(div_char=
 
484
                                                     self.divider)))
 
485
        if self.log_visible:
 
486
            self.uilist.append(self.logbox)
 
487
        self.topwidget = urwid.Pile(self.uilist)
 
488
    
 
489
    def log_message(self, message):
 
490
        """Log message formatted with timestamp"""
 
491
        timestamp = datetime.datetime.now().isoformat()
 
492
        self.log_message_raw(timestamp + ": " + message)
 
493
    
 
494
    def log_message_raw(self, markup):
 
495
        """Add a log message to the log buffer."""
 
496
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
497
        if (self.max_log_length
 
498
            and len(self.log) > self.max_log_length):
 
499
            del self.log[0:len(self.log)-self.max_log_length-1]
 
500
        self.logbox.set_focus(len(self.logbox.body.contents),
 
501
                              coming_from="above")
 
502
        self.refresh()
 
503
    
 
504
    def toggle_log_display(self):
 
505
        """Toggle visibility of the log buffer."""
 
506
        self.log_visible = not self.log_visible
 
507
        self.rebuild()
 
508
        #self.log_message("Log visibility changed to: "
 
509
        #                 + str(self.log_visible))
 
510
    
 
511
    def change_log_display(self):
 
512
        """Change type of log display.
 
513
        Currently, this toggles wrapping of text lines."""
 
514
        if self.log_wrap == "clip":
 
515
            self.log_wrap = "any"
 
516
        else:
 
517
            self.log_wrap = "clip"
 
518
        for textwidget in self.log:
 
519
            textwidget.set_wrap_mode(self.log_wrap)
 
520
        #self.log_message("Wrap mode: " + self.log_wrap)
 
521
    
 
522
    def find_and_remove_client(self, path, name):
 
523
        """Find a client by its object path and remove it.
 
524
        
 
525
        This is connected to the ClientRemoved signal from the
 
526
        Mandos server object."""
 
527
        try:
 
528
            client = self.clients_dict[path]
 
529
        except KeyError:
 
530
            # not found?
 
531
            self.log_message("Unknown client {0!r} ({1!r}) removed"
 
532
                             .format(name, path))
 
533
            return
 
534
        client.delete()
 
535
    
 
536
    def add_new_client(self, path):
 
537
        client_proxy_object = self.bus.get_object(self.busname, path)
 
538
        self.add_client(MandosClientWidget(server_proxy_object
 
539
                                           =self.mandos_serv,
 
540
                                           proxy_object
 
541
                                           =client_proxy_object,
 
542
                                           update_hook
 
543
                                           =self.refresh,
 
544
                                           delete_hook
 
545
                                           =self.remove_client,
 
546
                                           logger
 
547
                                           =self.log_message),
 
548
                        path=path)
 
549
    
 
550
    def add_client(self, client, path=None):
 
551
        self.clients.append(client)
 
552
        if path is None:
 
553
            path = client.proxy.object_path
 
554
        self.clients_dict[path] = client
 
555
        self.clients.sort(key=lambda c: c.properties["Name"])
 
556
        self.refresh()
 
557
    
 
558
    def remove_client(self, client, path=None):
 
559
        self.clients.remove(client)
 
560
        if path is None:
 
561
            path = client.proxy.object_path
 
562
        del self.clients_dict[path]
 
563
        self.refresh()
 
564
    
 
565
    def refresh(self):
 
566
        """Redraw the screen"""
 
567
        canvas = self.topwidget.render(self.size, focus=True)
 
568
        self.screen.draw_screen(self.size, canvas)
 
569
    
 
570
    def run(self):
 
571
        """Start the main loop and exit when it's done."""
 
572
        self.bus = dbus.SystemBus()
 
573
        mandos_dbus_objc = self.bus.get_object(
 
574
            self.busname, "/", follow_name_owner_changes=True)
 
575
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
 
576
                                          dbus_interface
 
577
                                          = server_interface)
 
578
        try:
 
579
            mandos_clients = (self.mandos_serv
 
580
                              .GetAllClientsWithProperties())
 
581
            if not mandos_clients:
 
582
                self.log_message_raw(("bold", "Note: Server has no clients."))
 
583
        except dbus.exceptions.DBusException:
 
584
            self.log_message_raw(("bold", "Note: No Mandos server running."))
 
585
            mandos_clients = dbus.Dictionary()
 
586
        
 
587
        (self.mandos_serv
 
588
         .connect_to_signal("ClientRemoved",
 
589
                            self.find_and_remove_client,
 
590
                            dbus_interface=server_interface,
 
591
                            byte_arrays=True))
 
592
        (self.mandos_serv
 
593
         .connect_to_signal("ClientAdded",
 
594
                            self.add_new_client,
 
595
                            dbus_interface=server_interface,
 
596
                            byte_arrays=True))
 
597
        (self.mandos_serv
 
598
         .connect_to_signal("ClientNotFound",
 
599
                            self.client_not_found,
 
600
                            dbus_interface=server_interface,
 
601
                            byte_arrays=True))
 
602
        for path, client in mandos_clients.items():
 
603
            client_proxy_object = self.bus.get_object(self.busname,
 
604
                                                      path)
 
605
            self.add_client(MandosClientWidget(server_proxy_object
 
606
                                               =self.mandos_serv,
 
607
                                               proxy_object
 
608
                                               =client_proxy_object,
 
609
                                               properties=client,
 
610
                                               update_hook
 
611
                                               =self.refresh,
 
612
                                               delete_hook
 
613
                                               =self.remove_client,
 
614
                                               logger
 
615
                                               =self.log_message),
 
616
                            path=path)
 
617
        
 
618
        self.refresh()
 
619
        self._input_callback_tag = (gobject.io_add_watch
 
620
                                    (sys.stdin.fileno(),
 
621
                                     gobject.IO_IN,
 
622
                                     self.process_input))
 
623
        self.main_loop.run()
 
624
        # Main loop has finished, we should close everything now
 
625
        gobject.source_remove(self._input_callback_tag)
 
626
        self.screen.stop()
 
627
    
 
628
    def stop(self):
 
629
        self.main_loop.quit()
 
630
    
 
631
    def process_input(self, source, condition):
 
632
        keys = self.screen.get_input()
 
633
        translations = { "ctrl n": "down",      # Emacs
 
634
                         "ctrl p": "up",        # Emacs
 
635
                         "ctrl v": "page down", # Emacs
 
636
                         "meta v": "page up",   # Emacs
 
637
                         " ": "page down",      # less
 
638
                         "f": "page down",      # less
 
639
                         "b": "page up",        # less
 
640
                         "j": "down",           # vi
 
641
                         "k": "up",             # vi
 
642
                         }
 
643
        for key in keys:
 
644
            try:
 
645
                key = translations[key]
 
646
            except KeyError:    # :-)
 
647
                pass
 
648
            
 
649
            if key == "q" or key == "Q":
 
650
                self.stop()
 
651
                break
 
652
            elif key == "window resize":
 
653
                self.size = self.screen.get_cols_rows()
 
654
                self.refresh()
 
655
            elif key == "\f":  # Ctrl-L
 
656
                self.refresh()
 
657
            elif key == "l" or key == "D":
 
658
                self.toggle_log_display()
 
659
                self.refresh()
 
660
            elif key == "w" or key == "i":
 
661
                self.change_log_display()
 
662
                self.refresh()
 
663
            elif key == "?" or key == "f1" or key == "esc":
 
664
                if not self.log_visible:
 
665
                    self.log_visible = True
 
666
                    self.rebuild()
 
667
                self.log_message_raw(("bold",
 
668
                                      "  ".
 
669
                                      join(("q: Quit",
 
670
                                            "?: Help",
 
671
                                            "l: Log window toggle",
 
672
                                            "TAB: Switch window",
 
673
                                            "w: Wrap (log)"))))
 
674
                self.log_message_raw(("bold",
 
675
                                      "  "
 
676
                                      .join(("Clients:",
 
677
                                             "+: Enable",
 
678
                                             "-: Disable",
 
679
                                             "R: Remove",
 
680
                                             "s: Start new checker",
 
681
                                             "S: Stop checker",
 
682
                                             "C: Checker OK",
 
683
                                             "a: Approve",
 
684
                                             "d: Deny"))))
 
685
                self.refresh()
 
686
            elif key == "tab":
 
687
                if self.topwidget.get_focus() is self.logbox:
 
688
                    self.topwidget.set_focus(0)
 
689
                else:
 
690
                    self.topwidget.set_focus(self.logbox)
 
691
                self.refresh()
 
692
            #elif (key == "end" or key == "meta >" or key == "G"
 
693
            #      or key == ">"):
 
694
            #    pass            # xxx end-of-buffer
 
695
            #elif (key == "home" or key == "meta <" or key == "g"
 
696
            #      or key == "<"):
 
697
            #    pass            # xxx beginning-of-buffer
 
698
            #elif key == "ctrl e" or key == "$":
 
699
            #    pass            # xxx move-end-of-line
 
700
            #elif key == "ctrl a" or key == "^":
 
701
            #    pass            # xxx move-beginning-of-line
 
702
            #elif key == "ctrl b" or key == "meta (" or key == "h":
 
703
            #    pass            # xxx left
 
704
            #elif key == "ctrl f" or key == "meta )" or key == "l":
 
705
            #    pass            # xxx right
 
706
            #elif key == "a":
 
707
            #    pass            # scroll up log
 
708
            #elif key == "z":
 
709
            #    pass            # scroll down log
 
710
            elif self.topwidget.selectable():
 
711
                self.topwidget.keypress(self.size, key)
 
712
                self.refresh()
 
713
        return True
 
714
 
 
715
ui = UserInterface()
 
716
try:
 
717
    ui.run()
 
718
except KeyboardInterrupt:
 
719
    ui.screen.stop()
 
720
except Exception as e:
 
721
    ui.log_message(str(e))
 
722
    ui.screen.stop()
 
723
    raise