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  • Committer: Teddy Hogeborn
  • Date: 2015-08-10 07:34:37 UTC
  • Revision ID: teddy@recompile.se-20150810073437-3m8jgt13nqric6vf
Revert change to D-Bus API.

The D-Bus API signal CheckerCompleted is documented to provide a
wait(2) status value.  Since the server switched to using subprocess
to run checkers, it no longer has access to a wait(2) status value.  A
previous change to work around this made the D-Bus API incompatible.
Revert this change by constructing a fake wait(2) status value; this
keeps the D-Bus API stable.

* DBUS-API (CheckerCompleted): Revert incompatible change.
* mandos (ClientDBus.checker_callback): Construct fake wait(2) status.
* mandos-monitor (MandosClientWidget.checker_completed): Revert to
                                                         using
                                                         original API
                                                         with wait(2)
                                                         condition
                                                         value.

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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 © 2009-2015 Teddy Hogeborn
 
7
# Copyright © 2009-2015 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.major == 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 = "1.6.9"
 
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("PropertiesChanged",
 
91
                                         self.properties_changed,
 
92
                                         dbus.PROPERTIES_IFACE,
 
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 properties_changed(self, interface, properties, invalidated):
 
104
        """This is called whenever we get a PropertiesChanged signal
 
105
        It updates the changed properties in the "properties" dict.
 
106
        """
 
107
        # Update properties dict with new value
 
108
        self.properties.update(properties)
 
109
    
 
110
    def delete(self):
 
111
        self.property_changed_match.remove()
 
112
 
 
113
 
 
114
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
 
115
    """A Mandos Client which is visible on the screen.
 
116
    """
 
117
    
 
118
    def __init__(self, server_proxy_object=None, update_hook=None,
 
119
                 delete_hook=None, logger=None, **kwargs):
 
120
        # Called on update
 
121
        self.update_hook = update_hook
 
122
        # Called on delete
 
123
        self.delete_hook = delete_hook
 
124
        # Mandos Server proxy object
 
125
        self.server_proxy_object = server_proxy_object
 
126
        # Logger
 
127
        self.logger = logger
 
128
        
 
129
        self._update_timer_callback_tag = None
 
130
        
 
131
        # The widget shown normally
 
132
        self._text_widget = urwid.Text("")
 
133
        # The widget shown when we have focus
 
134
        self._focus_text_widget = urwid.Text("")
 
135
        super(MandosClientWidget, self).__init__(**kwargs)
 
136
        self.update()
 
137
        self.opened = False
 
138
        
 
139
        self.match_objects = (
 
140
            self.proxy.connect_to_signal("CheckerCompleted",
 
141
                                         self.checker_completed,
 
142
                                         client_interface,
 
143
                                         byte_arrays=True),
 
144
            self.proxy.connect_to_signal("CheckerStarted",
 
145
                                         self.checker_started,
 
146
                                         client_interface,
 
147
                                         byte_arrays=True),
 
148
            self.proxy.connect_to_signal("GotSecret",
 
149
                                         self.got_secret,
 
150
                                         client_interface,
 
151
                                         byte_arrays=True),
 
152
            self.proxy.connect_to_signal("NeedApproval",
 
153
                                         self.need_approval,
 
154
                                         client_interface,
 
155
                                         byte_arrays=True),
 
156
            self.proxy.connect_to_signal("Rejected",
 
157
                                         self.rejected,
 
158
                                         client_interface,
 
159
                                         byte_arrays=True))
 
160
        self.logger('Created client {}'
 
161
                    .format(self.properties["Name"]), level=0)
 
162
    
 
163
    def using_timer(self, flag):
 
164
        """Call this method with True or False when timer should be
 
165
        activated or deactivated.
 
166
        """
 
167
        if flag and self._update_timer_callback_tag is None:
 
168
            # Will update the shown timer value every second
 
169
            self._update_timer_callback_tag = (gobject.timeout_add
 
170
                                               (1000,
 
171
                                                self.update_timer))
 
172
        elif not (flag or self._update_timer_callback_tag is None):
 
173
            gobject.source_remove(self._update_timer_callback_tag)
 
174
            self._update_timer_callback_tag = None
 
175
    
 
176
    def checker_completed(self, exitstatus, condition, command):
 
177
        if exitstatus == 0:
 
178
            self.logger('Checker for client {} (command "{}")'
 
179
                        ' succeeded'.format(self.properties["Name"],
 
180
                                            command), level=0)
 
181
            self.update()
 
182
            return
 
183
        # Checker failed
 
184
        if os.WIFEXITED(condition):
 
185
            self.logger('Checker for client {} (command "{}") failed'
 
186
                        ' with exit code {}'
 
187
                        .format(self.properties["Name"], command,
 
188
                                os.WEXITSTATUS(condition)))
 
189
        elif os.WIFSIGNALED(condition):
 
190
            self.logger('Checker for client {} (command "{}") was'
 
191
                        ' killed by signal {}'
 
192
                        .format(self.properties["Name"], command,
 
193
                                os.WTERMSIG(condition)))
 
194
        self.update()
 
195
    
 
196
    def checker_started(self, command):
 
197
        """Server signals that a checker started."""
 
198
        self.logger('Client {} started checker "{}"'
 
199
                    .format(self.properties["Name"],
 
200
                            command), level=0)
 
201
    
 
202
    def got_secret(self):
 
203
        self.logger('Client {} received its secret'
 
204
                    .format(self.properties["Name"]))
 
205
    
 
206
    def need_approval(self, timeout, default):
 
207
        if not default:
 
208
            message = 'Client {} needs approval within {} seconds'
 
209
        else:
 
210
            message = 'Client {} will get its secret in {} seconds'
 
211
        self.logger(message.format(self.properties["Name"],
 
212
                                   timeout/1000))
 
213
    
 
214
    def rejected(self, reason):
 
215
        self.logger('Client {} was rejected; reason: {}'
 
216
                    .format(self.properties["Name"], reason))
 
217
    
 
218
    def selectable(self):
 
219
        """Make this a "selectable" widget.
 
220
        This overrides the method from urwid.FlowWidget."""
 
221
        return True
 
222
    
 
223
    def rows(self, maxcolrow, focus=False):
 
224
        """How many rows this widget will occupy might depend on
 
225
        whether we have focus or not.
 
226
        This overrides the method from urwid.FlowWidget"""
 
227
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
228
    
 
229
    def current_widget(self, focus=False):
 
230
        if focus or self.opened:
 
231
            return self._focus_widget
 
232
        return self._widget
 
233
    
 
234
    def update(self):
 
235
        "Called when what is visible on the screen should be updated."
 
236
        # How to add standout mode to a style
 
237
        with_standout = { "normal": "standout",
 
238
                          "bold": "bold-standout",
 
239
                          "underline-blink":
 
240
                              "underline-blink-standout",
 
241
                          "bold-underline-blink":
 
242
                              "bold-underline-blink-standout",
 
243
                          }
 
244
        
 
245
        # Rebuild focus and non-focus widgets using current properties
 
246
        
 
247
        # Base part of a client. Name!
 
248
        base = '{name}: '.format(name=self.properties["Name"])
 
249
        if not self.properties["Enabled"]:
 
250
            message = "DISABLED"
 
251
            self.using_timer(False)
 
252
        elif self.properties["ApprovalPending"]:
 
253
            timeout = datetime.timedelta(milliseconds
 
254
                                         = self.properties
 
255
                                         ["ApprovalDelay"])
 
256
            last_approval_request = isoformat_to_datetime(
 
257
                self.properties["LastApprovalRequest"])
 
258
            if last_approval_request is not None:
 
259
                timer = max(timeout - (datetime.datetime.utcnow()
 
260
                                       - last_approval_request),
 
261
                            datetime.timedelta())
 
262
            else:
 
263
                timer = datetime.timedelta()
 
264
            if self.properties["ApprovedByDefault"]:
 
265
                message = "Approval in {}. (d)eny?"
 
266
            else:
 
267
                message = "Denial in {}. (a)pprove?"
 
268
            message = message.format(str(timer).rsplit(".", 1)[0])
 
269
            self.using_timer(True)
 
270
        elif self.properties["LastCheckerStatus"] != 0:
 
271
            # When checker has failed, show timer until client expires
 
272
            expires = self.properties["Expires"]
 
273
            if expires == "":
 
274
                timer = datetime.timedelta(0)
 
275
            else:
 
276
                expires = (datetime.datetime.strptime
 
277
                           (expires, '%Y-%m-%dT%H:%M:%S.%f'))
 
278
                timer = max(expires - datetime.datetime.utcnow(),
 
279
                            datetime.timedelta())
 
280
            message = ('A checker has failed! Time until client'
 
281
                       ' gets disabled: {}'
 
282
                       .format(str(timer).rsplit(".", 1)[0]))
 
283
            self.using_timer(True)
 
284
        else:
 
285
            message = "enabled"
 
286
            self.using_timer(False)
 
287
        self._text = "{}{}".format(base, message)
 
288
        
 
289
        if not urwid.supports_unicode():
 
290
            self._text = self._text.encode("ascii", "replace")
 
291
        textlist = [("normal", self._text)]
 
292
        self._text_widget.set_text(textlist)
 
293
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
294
                                           text[1])
 
295
                                          if isinstance(text, tuple)
 
296
                                          else text
 
297
                                          for text in textlist])
 
298
        self._widget = self._text_widget
 
299
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
300
                                            "standout")
 
301
        # Run update hook, if any
 
302
        if self.update_hook is not None:
 
303
            self.update_hook()
 
304
    
 
305
    def update_timer(self):
 
306
        """called by gobject. Will indefinitely loop until
 
307
        gobject.source_remove() on tag is called"""
 
308
        self.update()
 
309
        return True             # Keep calling this
 
310
    
 
311
    def delete(self, **kwargs):
 
312
        if self._update_timer_callback_tag is not None:
 
313
            gobject.source_remove(self._update_timer_callback_tag)
 
314
            self._update_timer_callback_tag = None
 
315
        for match in self.match_objects:
 
316
            match.remove()
 
317
        self.match_objects = ()
 
318
        if self.delete_hook is not None:
 
319
            self.delete_hook(self)
 
320
        return super(MandosClientWidget, self).delete(**kwargs)
 
321
    
 
322
    def render(self, maxcolrow, focus=False):
 
323
        """Render differently if we have focus.
 
324
        This overrides the method from urwid.FlowWidget"""
 
325
        return self.current_widget(focus).render(maxcolrow,
 
326
                                                 focus=focus)
 
327
    
 
328
    def keypress(self, maxcolrow, key):
 
329
        """Handle keys.
 
330
        This overrides the method from urwid.FlowWidget"""
 
331
        if key == "+":
 
332
            self.proxy.Set(client_interface, "Enabled",
 
333
                           dbus.Boolean(True), ignore_reply = True,
 
334
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
335
        elif key == "-":
 
336
            self.proxy.Set(client_interface, "Enabled", False,
 
337
                           ignore_reply = True,
 
338
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
339
        elif key == "a":
 
340
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
341
                               dbus_interface = client_interface,
 
342
                               ignore_reply=True)
 
343
        elif key == "d":
 
344
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
345
                                  dbus_interface = client_interface,
 
346
                               ignore_reply=True)
 
347
        elif key == "R" or key == "_" or key == "ctrl k":
 
348
            self.server_proxy_object.RemoveClient(self.proxy
 
349
                                                  .object_path,
 
350
                                                  ignore_reply=True)
 
351
        elif key == "s":
 
352
            self.proxy.Set(client_interface, "CheckerRunning",
 
353
                           dbus.Boolean(True), ignore_reply = True,
 
354
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
355
        elif key == "S":
 
356
            self.proxy.Set(client_interface, "CheckerRunning",
 
357
                           dbus.Boolean(False), ignore_reply = True,
 
358
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
359
        elif key == "C":
 
360
            self.proxy.CheckedOK(dbus_interface = client_interface,
 
361
                                 ignore_reply=True)
 
362
        # xxx
 
363
#         elif key == "p" or key == "=":
 
364
#             self.proxy.pause()
 
365
#         elif key == "u" or key == ":":
 
366
#             self.proxy.unpause()
 
367
#         elif key == "RET":
 
368
#             self.open()
 
369
        else:
 
370
            return key
 
371
    
 
372
    def properties_changed(self, interface, properties, invalidated):
 
373
        """Call self.update() if any properties changed.
 
374
        This overrides the method from MandosClientPropertyCache"""
 
375
        old_values = { key: self.properties.get(key)
 
376
                       for key in properties.keys() }
 
377
        super(MandosClientWidget, self).properties_changed(
 
378
            interface, properties, invalidated)
 
379
        if any(old_values[key] != self.properties.get(key)
 
380
               for key in old_values):
 
381
            self.update()
 
382
 
 
383
 
 
384
class ConstrainedListBox(urwid.ListBox):
 
385
    """Like a normal urwid.ListBox, but will consume all "up" or
 
386
    "down" key presses, thus not allowing any containing widgets to
 
387
    use them as an excuse to shift focus away from this widget.
 
388
    """
 
389
    def keypress(self, *args, **kwargs):
 
390
        ret = super(ConstrainedListBox, self).keypress(*args, **kwargs)
 
391
        if ret in ("up", "down"):
 
392
            return
 
393
        return ret
 
394
 
 
395
 
 
396
class UserInterface(object):
 
397
    """This is the entire user interface - the whole screen
 
398
    with boxes, lists of client widgets, etc.
 
399
    """
 
400
    def __init__(self, max_log_length=1000, log_level=1):
 
401
        DBusGMainLoop(set_as_default=True)
 
402
        
 
403
        self.screen = urwid.curses_display.Screen()
 
404
        
 
405
        self.screen.register_palette((
 
406
                ("normal",
 
407
                 "default", "default", None),
 
408
                ("bold",
 
409
                 "bold", "default", "bold"),
 
410
                ("underline-blink",
 
411
                 "underline,blink", "default", "underline,blink"),
 
412
                ("standout",
 
413
                 "standout", "default", "standout"),
 
414
                ("bold-underline-blink",
 
415
                 "bold,underline,blink", "default", "bold,underline,blink"),
 
416
                ("bold-standout",
 
417
                 "bold,standout", "default", "bold,standout"),
 
418
                ("underline-blink-standout",
 
419
                 "underline,blink,standout", "default",
 
420
                 "underline,blink,standout"),
 
421
                ("bold-underline-blink-standout",
 
422
                 "bold,underline,blink,standout", "default",
 
423
                 "bold,underline,blink,standout"),
 
424
                ))
 
425
        
 
426
        if urwid.supports_unicode():
 
427
            self.divider = "─" # \u2500
 
428
            #self.divider = "━" # \u2501
 
429
        else:
 
430
            #self.divider = "-" # \u002d
 
431
            self.divider = "_" # \u005f
 
432
        
 
433
        self.screen.start()
 
434
        
 
435
        self.size = self.screen.get_cols_rows()
 
436
        
 
437
        self.clients = urwid.SimpleListWalker([])
 
438
        self.clients_dict = {}
 
439
        
 
440
        # We will add Text widgets to this list
 
441
        self.log = []
 
442
        self.max_log_length = max_log_length
 
443
        
 
444
        self.log_level = log_level
 
445
        
 
446
        # We keep a reference to the log widget so we can remove it
 
447
        # from the ListWalker without it getting destroyed
 
448
        self.logbox = ConstrainedListBox(self.log)
 
449
        
 
450
        # This keeps track of whether self.uilist currently has
 
451
        # self.logbox in it or not
 
452
        self.log_visible = True
 
453
        self.log_wrap = "any"
 
454
        
 
455
        self.rebuild()
 
456
        self.log_message_raw(("bold",
 
457
                              "Mandos Monitor version " + version))
 
458
        self.log_message_raw(("bold",
 
459
                              "q: Quit  ?: Help"))
 
460
        
 
461
        self.busname = domain + '.Mandos'
 
462
        self.main_loop = gobject.MainLoop()
 
463
    
 
464
    def client_not_found(self, fingerprint, address):
 
465
        self.log_message("Client with address {} and fingerprint {}"
 
466
                         " could not be found"
 
467
                         .format(address, fingerprint))
 
468
    
 
469
    def rebuild(self):
 
470
        """This rebuilds the User Interface.
 
471
        Call this when the widget layout needs to change"""
 
472
        self.uilist = []
 
473
        #self.uilist.append(urwid.ListBox(self.clients))
 
474
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
475
                                                          clients),
 
476
                                       #header=urwid.Divider(),
 
477
                                       header=None,
 
478
                                       footer=
 
479
                                       urwid.Divider(div_char=
 
480
                                                     self.divider)))
 
481
        if self.log_visible:
 
482
            self.uilist.append(self.logbox)
 
483
        self.topwidget = urwid.Pile(self.uilist)
 
484
    
 
485
    def log_message(self, message, level=1):
 
486
        """Log message formatted with timestamp"""
 
487
        if level < self.log_level:
 
488
            return
 
489
        timestamp = datetime.datetime.now().isoformat()
 
490
        self.log_message_raw("{}: {}".format(timestamp, message),
 
491
                             level=level)
 
492
    
 
493
    def log_message_raw(self, markup, level=1):
 
494
        """Add a log message to the log buffer."""
 
495
        if level < self.log_level:
 
496
            return
 
497
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
498
        if (self.max_log_length
 
499
            and len(self.log) > self.max_log_length):
 
500
            del self.log[0:len(self.log)-self.max_log_length-1]
 
501
        self.logbox.set_focus(len(self.logbox.body.contents),
 
502
                              coming_from="above")
 
503
        self.refresh()
 
504
    
 
505
    def toggle_log_display(self):
 
506
        """Toggle visibility of the log buffer."""
 
507
        self.log_visible = not self.log_visible
 
508
        self.rebuild()
 
509
        self.log_message("Log visibility changed to: {}"
 
510
                         .format(self.log_visible), level=0)
 
511
    
 
512
    def change_log_display(self):
 
513
        """Change type of log display.
 
514
        Currently, this toggles wrapping of text lines."""
 
515
        if self.log_wrap == "clip":
 
516
            self.log_wrap = "any"
 
517
        else:
 
518
            self.log_wrap = "clip"
 
519
        for textwidget in self.log:
 
520
            textwidget.set_wrap_mode(self.log_wrap)
 
521
        self.log_message("Wrap mode: {}".format(self.log_wrap),
 
522
                         level=0)
 
523
    
 
524
    def find_and_remove_client(self, path, name):
 
525
        """Find a client by its object path and remove it.
 
526
        
 
527
        This is connected to the ClientRemoved signal from the
 
528
        Mandos server object."""
 
529
        try:
 
530
            client = self.clients_dict[path]
 
531
        except KeyError:
 
532
            # not found?
 
533
            self.log_message("Unknown client {!r} ({!r}) removed"
 
534
                             .format(name, path))
 
535
            return
 
536
        client.delete()
 
537
    
 
538
    def add_new_client(self, path):
 
539
        client_proxy_object = self.bus.get_object(self.busname, path)
 
540
        self.add_client(MandosClientWidget(server_proxy_object
 
541
                                           =self.mandos_serv,
 
542
                                           proxy_object
 
543
                                           =client_proxy_object,
 
544
                                           update_hook
 
545
                                           =self.refresh,
 
546
                                           delete_hook
 
547
                                           =self.remove_client,
 
548
                                           logger
 
549
                                           =self.log_message),
 
550
                        path=path)
 
551
    
 
552
    def add_client(self, client, path=None):
 
553
        self.clients.append(client)
 
554
        if path is None:
 
555
            path = client.proxy.object_path
 
556
        self.clients_dict[path] = client
 
557
        self.clients.sort(key=lambda c: c.properties["Name"])
 
558
        self.refresh()
 
559
    
 
560
    def remove_client(self, client, path=None):
 
561
        self.clients.remove(client)
 
562
        if path is None:
 
563
            path = client.proxy.object_path
 
564
        del self.clients_dict[path]
 
565
        self.refresh()
 
566
    
 
567
    def refresh(self):
 
568
        """Redraw the screen"""
 
569
        canvas = self.topwidget.render(self.size, focus=True)
 
570
        self.screen.draw_screen(self.size, canvas)
 
571
    
 
572
    def run(self):
 
573
        """Start the main loop and exit when it's done."""
 
574
        self.bus = dbus.SystemBus()
 
575
        mandos_dbus_objc = self.bus.get_object(
 
576
            self.busname, "/", follow_name_owner_changes=True)
 
577
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
 
578
                                          dbus_interface
 
579
                                          = server_interface)
 
580
        try:
 
581
            mandos_clients = (self.mandos_serv
 
582
                              .GetAllClientsWithProperties())
 
583
            if not mandos_clients:
 
584
                self.log_message_raw(("bold", "Note: Server has no clients."))
 
585
        except dbus.exceptions.DBusException:
 
586
            self.log_message_raw(("bold", "Note: No Mandos server running."))
 
587
            mandos_clients = dbus.Dictionary()
 
588
        
 
589
        (self.mandos_serv
 
590
         .connect_to_signal("ClientRemoved",
 
591
                            self.find_and_remove_client,
 
592
                            dbus_interface=server_interface,
 
593
                            byte_arrays=True))
 
594
        (self.mandos_serv
 
595
         .connect_to_signal("ClientAdded",
 
596
                            self.add_new_client,
 
597
                            dbus_interface=server_interface,
 
598
                            byte_arrays=True))
 
599
        (self.mandos_serv
 
600
         .connect_to_signal("ClientNotFound",
 
601
                            self.client_not_found,
 
602
                            dbus_interface=server_interface,
 
603
                            byte_arrays=True))
 
604
        for path, client in mandos_clients.items():
 
605
            client_proxy_object = self.bus.get_object(self.busname,
 
606
                                                      path)
 
607
            self.add_client(MandosClientWidget(server_proxy_object
 
608
                                               =self.mandos_serv,
 
609
                                               proxy_object
 
610
                                               =client_proxy_object,
 
611
                                               properties=client,
 
612
                                               update_hook
 
613
                                               =self.refresh,
 
614
                                               delete_hook
 
615
                                               =self.remove_client,
 
616
                                               logger
 
617
                                               =self.log_message),
 
618
                            path=path)
 
619
        
 
620
        self.refresh()
 
621
        self._input_callback_tag = (gobject.io_add_watch
 
622
                                    (sys.stdin.fileno(),
 
623
                                     gobject.IO_IN,
 
624
                                     self.process_input))
 
625
        self.main_loop.run()
 
626
        # Main loop has finished, we should close everything now
 
627
        gobject.source_remove(self._input_callback_tag)
 
628
        self.screen.stop()
 
629
    
 
630
    def stop(self):
 
631
        self.main_loop.quit()
 
632
    
 
633
    def process_input(self, source, condition):
 
634
        keys = self.screen.get_input()
 
635
        translations = { "ctrl n": "down",      # Emacs
 
636
                         "ctrl p": "up",        # Emacs
 
637
                         "ctrl v": "page down", # Emacs
 
638
                         "meta v": "page up",   # Emacs
 
639
                         " ": "page down",      # less
 
640
                         "f": "page down",      # less
 
641
                         "b": "page up",        # less
 
642
                         "j": "down",           # vi
 
643
                         "k": "up",             # vi
 
644
                         }
 
645
        for key in keys:
 
646
            try:
 
647
                key = translations[key]
 
648
            except KeyError:    # :-)
 
649
                pass
 
650
            
 
651
            if key == "q" or key == "Q":
 
652
                self.stop()
 
653
                break
 
654
            elif key == "window resize":
 
655
                self.size = self.screen.get_cols_rows()
 
656
                self.refresh()
 
657
            elif key == "ctrl l":
 
658
                self.screen.clear()
 
659
                self.refresh()
 
660
            elif key == "l" or key == "D":
 
661
                self.toggle_log_display()
 
662
                self.refresh()
 
663
            elif key == "w" or key == "i":
 
664
                self.change_log_display()
 
665
                self.refresh()
 
666
            elif key == "?" or key == "f1" or key == "esc":
 
667
                if not self.log_visible:
 
668
                    self.log_visible = True
 
669
                    self.rebuild()
 
670
                self.log_message_raw(("bold",
 
671
                                      "  ".
 
672
                                      join(("q: Quit",
 
673
                                            "?: Help",
 
674
                                            "l: Log window toggle",
 
675
                                            "TAB: Switch window",
 
676
                                            "w: Wrap (log lines)",
 
677
                                            "v: Toggle verbose log",
 
678
                                            ))))
 
679
                self.log_message_raw(("bold",
 
680
                                      "  "
 
681
                                      .join(("Clients:",
 
682
                                             "+: Enable",
 
683
                                             "-: Disable",
 
684
                                             "R: Remove",
 
685
                                             "s: Start new checker",
 
686
                                             "S: Stop checker",
 
687
                                             "C: Checker OK",
 
688
                                             "a: Approve",
 
689
                                             "d: Deny"))))
 
690
                self.refresh()
 
691
            elif key == "tab":
 
692
                if self.topwidget.get_focus() is self.logbox:
 
693
                    self.topwidget.set_focus(0)
 
694
                else:
 
695
                    self.topwidget.set_focus(self.logbox)
 
696
                self.refresh()
 
697
            elif key == "v":
 
698
                if self.log_level == 0:
 
699
                    self.log_level = 1
 
700
                    self.log_message("Verbose mode: Off")
 
701
                else:
 
702
                    self.log_level = 0
 
703
                    self.log_message("Verbose mode: On")
 
704
            #elif (key == "end" or key == "meta >" or key == "G"
 
705
            #      or key == ">"):
 
706
            #    pass            # xxx end-of-buffer
 
707
            #elif (key == "home" or key == "meta <" or key == "g"
 
708
            #      or key == "<"):
 
709
            #    pass            # xxx beginning-of-buffer
 
710
            #elif key == "ctrl e" or key == "$":
 
711
            #    pass            # xxx move-end-of-line
 
712
            #elif key == "ctrl a" or key == "^":
 
713
            #    pass            # xxx move-beginning-of-line
 
714
            #elif key == "ctrl b" or key == "meta (" or key == "h":
 
715
            #    pass            # xxx left
 
716
            #elif key == "ctrl f" or key == "meta )" or key == "l":
 
717
            #    pass            # xxx right
 
718
            #elif key == "a":
 
719
            #    pass            # scroll up log
 
720
            #elif key == "z":
 
721
            #    pass            # scroll down log
 
722
            elif self.topwidget.selectable():
 
723
                self.topwidget.keypress(self.size, key)
 
724
                self.refresh()
 
725
        return True
 
726
 
 
727
ui = UserInterface()
 
728
try:
 
729
    ui.run()
 
730
except KeyboardInterrupt:
 
731
    ui.screen.stop()
 
732
except Exception as e:
 
733
    ui.log_message(str(e))
 
734
    ui.screen.stop()
 
735
    raise