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  • Committer: Teddy Hogeborn
  • Date: 2008-08-22 00:16:20 UTC
  • mfrom: (24.1.57 mandos)
  • Revision ID: teddy@fukt.bsnet.se-20080822001620-vxpn1evy0t0kyvj0
* clients.conf ([DEFAULT]/checker): Update to new default value.

* mandos (Client.start_checker): Bug fix: OSError, not
                                 subprocess.OSError.
  (main): Use "fping -q -- %(host)s" instead of "fping -q --
          %%(host)s" as default value for "checker".  Always redirect
          stdin to be from /dev/null, even if in debug mode.

* mandos-clients.conf.xml (DESCRIPTION): Improved wording and refer to
                                         the EXPANSION section.
  (OPTIONS): Added synopsis and improved wording for "checker",
             "fingerprint", and "secret".  Refer to the RUNTIME
             EXPANSION section for the "checker" option.
  (EXAMPLE): Update to new default value for "checker".

* mandos-keygen (trap): Split lines and add "set +e".

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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 © 2009-2012 Teddy Hogeborn
7
 
# Copyright © 2009-2012 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@recompile.se>.
23
 
# 
24
 
 
25
 
from __future__ import (division, absolute_import, print_function,
26
 
                        unicode_literals)
27
 
 
28
 
import sys
29
 
import os
30
 
import signal
31
 
 
32
 
import datetime
33
 
 
34
 
import urwid.curses_display
35
 
import urwid
36
 
 
37
 
from dbus.mainloop.glib import DBusGMainLoop
38
 
import gobject
39
 
 
40
 
import dbus
41
 
 
42
 
import UserList
43
 
 
44
 
import locale
45
 
 
46
 
locale.setlocale(locale.LC_ALL, '')
47
 
 
48
 
import logging
49
 
logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
50
 
 
51
 
# Some useful constants
52
 
domain = 'se.recompile'
53
 
server_interface = domain + '.Mandos'
54
 
client_interface = domain + '.Mandos.Client'
55
 
version = "1.5.3"
56
 
 
57
 
# Always run in monochrome mode
58
 
urwid.curses_display.curses.has_colors = lambda : False
59
 
 
60
 
# Urwid doesn't support blinking, but we want it.  Since we have no
61
 
# use for underline on its own, we make underline also always blink.
62
 
urwid.curses_display.curses.A_UNDERLINE |= (
63
 
    urwid.curses_display.curses.A_BLINK)
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, *args, **kwargs):
87
 
        self.proxy = proxy_object # Mandos Client proxy object
88
 
        
89
 
        self.properties = dict()
90
 
        self.property_changed_match = (
91
 
            self.proxy.connect_to_signal("PropertyChanged",
92
 
                                         self.property_changed,
93
 
                                         client_interface,
94
 
                                         byte_arrays=True))
95
 
        
96
 
        self.properties.update(
97
 
            self.proxy.GetAll(client_interface,
98
 
                              dbus_interface = dbus.PROPERTIES_IFACE))
99
 
 
100
 
        #XXX This breaks good super behaviour
101
 
#        super(MandosClientPropertyCache, self).__init__(
102
 
#            *args, **kwargs)
103
 
    
104
 
    def property_changed(self, property=None, value=None):
105
 
        """This is called whenever we get a PropertyChanged signal
106
 
        It updates the changed property in the "properties" dict.
107
 
        """
108
 
        # Update properties dict with new value
109
 
        self.properties[property] = value
110
 
    
111
 
    def delete(self, *args, **kwargs):
112
 
        self.property_changed_match.remove()
113
 
        super(MandosClientPropertyCache, self).__init__(
114
 
            *args, **kwargs)
115
 
 
116
 
 
117
 
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
118
 
    """A Mandos Client which is visible on the screen.
119
 
    """
120
 
    
121
 
    def __init__(self, server_proxy_object=None, update_hook=None,
122
 
                 delete_hook=None, logger=None, *args, **kwargs):
123
 
        # Called on update
124
 
        self.update_hook = update_hook
125
 
        # Called on delete
126
 
        self.delete_hook = delete_hook
127
 
        # Mandos Server proxy object
128
 
        self.server_proxy_object = server_proxy_object
129
 
        # Logger
130
 
        self.logger = logger
131
 
        
132
 
        self._update_timer_callback_tag = None
133
 
        self._update_timer_callback_lock = 0
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__(
140
 
            update_hook=update_hook, delete_hook=delete_hook,
141
 
            *args, **kwargs)
142
 
        self.update()
143
 
        self.opened = False
144
 
        
145
 
        last_checked_ok = isoformat_to_datetime(self.properties
146
 
                                                ["LastCheckedOK"])
147
 
        
148
 
        if self.properties ["LastCheckerStatus"] != 0:
149
 
            self.using_timer(True)
150
 
        
151
 
        if self.need_approval:
152
 
            self.using_timer(True)
153
 
        
154
 
        self.match_objects = (
155
 
            self.proxy.connect_to_signal("CheckerCompleted",
156
 
                                         self.checker_completed,
157
 
                                         client_interface,
158
 
                                         byte_arrays=True),
159
 
            self.proxy.connect_to_signal("CheckerStarted",
160
 
                                         self.checker_started,
161
 
                                         client_interface,
162
 
                                         byte_arrays=True),
163
 
            self.proxy.connect_to_signal("GotSecret",
164
 
                                         self.got_secret,
165
 
                                         client_interface,
166
 
                                         byte_arrays=True),
167
 
            self.proxy.connect_to_signal("NeedApproval",
168
 
                                         self.need_approval,
169
 
                                         client_interface,
170
 
                                         byte_arrays=True),
171
 
            self.proxy.connect_to_signal("Rejected",
172
 
                                         self.rejected,
173
 
                                         client_interface,
174
 
                                         byte_arrays=True))
175
 
        #self.logger('Created client %s' % (self.properties["Name"]))
176
 
    
177
 
    def property_changed(self, property=None, value=None):
178
 
        super(self, MandosClientWidget).property_changed(property,
179
 
                                                         value)
180
 
        if property == "ApprovalPending":
181
 
            using_timer(bool(value))
182
 
        if property == "LastCheckerStatus":
183
 
            using_timer(value != 0)
184
 
            #self.logger('Checker for client %s (command "%s")'
185
 
            #            ' was successful'
186
 
            #            % (self.properties["Name"], command))
187
 
    
188
 
    def using_timer(self, flag):
189
 
        """Call this method with True or False when timer should be
190
 
        activated or deactivated.
191
 
        """
192
 
        old = self._update_timer_callback_lock
193
 
        if flag:
194
 
            self._update_timer_callback_lock += 1
195
 
        else:
196
 
            self._update_timer_callback_lock -= 1
197
 
        if old == 0 and self._update_timer_callback_lock:
198
 
            # Will update the shown timer value every second
199
 
            self._update_timer_callback_tag = (gobject.timeout_add
200
 
                                               (1000,
201
 
                                                self.update_timer))
202
 
        elif old and self._update_timer_callback_lock == 0:
203
 
            gobject.source_remove(self._update_timer_callback_tag)
204
 
            self._update_timer_callback_tag = None
205
 
    
206
 
    def checker_completed(self, exitstatus, condition, command):
207
 
        if exitstatus == 0:
208
 
            self.update()
209
 
            return
210
 
        # Checker failed
211
 
        if os.WIFEXITED(condition):
212
 
            self.logger('Checker for client %s (command "%s")'
213
 
                        ' failed with exit code %s'
214
 
                        % (self.properties["Name"], command,
215
 
                           os.WEXITSTATUS(condition)))
216
 
        elif os.WIFSIGNALED(condition):
217
 
            self.logger('Checker for client %s (command "%s")'
218
 
                        ' was killed by signal %s'
219
 
                        % (self.properties["Name"], command,
220
 
                           os.WTERMSIG(condition)))
221
 
        elif os.WCOREDUMP(condition):
222
 
            self.logger('Checker for client %s (command "%s")'
223
 
                        ' dumped core'
224
 
                        % (self.properties["Name"], command))
225
 
        else:
226
 
            self.logger('Checker for client %s completed'
227
 
                        ' mysteriously')
228
 
        self.update()
229
 
    
230
 
    def checker_started(self, command):
231
 
        """Server signals that a checker started. This could be useful
232
 
           to log in the future. """
233
 
        #self.logger('Client %s started checker "%s"'
234
 
        #            % (self.properties["Name"], unicode(command)))
235
 
        pass
236
 
    
237
 
    def got_secret(self):
238
 
        self.logger('Client %s received its secret'
239
 
                    % self.properties["Name"])
240
 
    
241
 
    def need_approval(self, timeout, default):
242
 
        if not default:
243
 
            message = 'Client %s needs approval within %s seconds'
244
 
        else:
245
 
            message = 'Client %s will get its secret in %s seconds'
246
 
        self.logger(message
247
 
                    % (self.properties["Name"], timeout/1000))
248
 
        self.using_timer(True)
249
 
    
250
 
    def rejected(self, reason):
251
 
        self.logger('Client %s was rejected; reason: %s'
252
 
                    % (self.properties["Name"], reason))
253
 
    
254
 
    def selectable(self):
255
 
        """Make this a "selectable" widget.
256
 
        This overrides the method from urwid.FlowWidget."""
257
 
        return True
258
 
    
259
 
    def rows(self, maxcolrow, focus=False):
260
 
        """How many rows this widget will occupy might depend on
261
 
        whether we have focus or not.
262
 
        This overrides the method from urwid.FlowWidget"""
263
 
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
264
 
    
265
 
    def current_widget(self, focus=False):
266
 
        if focus or self.opened:
267
 
            return self._focus_widget
268
 
        return self._widget
269
 
    
270
 
    def update(self):
271
 
        "Called when what is visible on the screen should be updated."
272
 
        # How to add standout mode to a style
273
 
        with_standout = { "normal": "standout",
274
 
                          "bold": "bold-standout",
275
 
                          "underline-blink":
276
 
                              "underline-blink-standout",
277
 
                          "bold-underline-blink":
278
 
                              "bold-underline-blink-standout",
279
 
                          }
280
 
 
281
 
        # Rebuild focus and non-focus widgets using current properties
282
 
 
283
 
        # Base part of a client. Name!
284
 
        base = ('%(name)s: '
285
 
                      % {"name": self.properties["Name"]})
286
 
        if not self.properties["Enabled"]:
287
 
            message = "DISABLED"
288
 
        elif self.properties["ApprovalPending"]:
289
 
            timeout = datetime.timedelta(milliseconds
290
 
                                         = self.properties
291
 
                                         ["ApprovalDelay"])
292
 
            last_approval_request = isoformat_to_datetime(
293
 
                self.properties["LastApprovalRequest"])
294
 
            if last_approval_request is not None:
295
 
                timer = timeout - (datetime.datetime.utcnow()
296
 
                                   - last_approval_request)
297
 
            else:
298
 
                timer = datetime.timedelta()
299
 
            if self.properties["ApprovedByDefault"]:
300
 
                message = "Approval in %s. (d)eny?"
301
 
            else:
302
 
                message = "Denial in %s. (a)pprove?"
303
 
            message = message % unicode(timer).rsplit(".", 1)[0]
304
 
        elif self.properties["LastCheckerStatus"] != 0:
305
 
            # When checker has failed, print a timer until client expires
306
 
            expires = self.properties["Expires"]
307
 
            if expires == "":
308
 
                timer = datetime.timedelta(0)
309
 
            else:
310
 
                expires = datetime.datetime.strptime(expires,
311
 
                                                     '%Y-%m-%dT%H:%M:%S.%f')
312
 
                timer = expires - datetime.datetime.utcnow()
313
 
            message = ('A checker has failed! Time until client'
314
 
                       ' gets disabled: %s'
315
 
                           % unicode(timer).rsplit(".", 1)[0])
316
 
        else:
317
 
            message = "enabled"
318
 
        self._text = "%s%s" % (base, message)
319
 
            
320
 
        if not urwid.supports_unicode():
321
 
            self._text = self._text.encode("ascii", "replace")
322
 
        textlist = [("normal", self._text)]
323
 
        self._text_widget.set_text(textlist)
324
 
        self._focus_text_widget.set_text([(with_standout[text[0]],
325
 
                                           text[1])
326
 
                                          if isinstance(text, tuple)
327
 
                                          else text
328
 
                                          for text in textlist])
329
 
        self._widget = self._text_widget
330
 
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
331
 
                                            "standout")
332
 
        # Run update hook, if any
333
 
        if self.update_hook is not None:
334
 
            self.update_hook()
335
 
    
336
 
    def update_timer(self):
337
 
        """called by gobject. Will indefinitely loop until
338
 
        gobject.source_remove() on tag is called"""
339
 
        self.update()
340
 
        return True             # Keep calling this
341
 
    
342
 
    def delete(self, *args, **kwargs):
343
 
        if self._update_timer_callback_tag is not None:
344
 
            gobject.source_remove(self._update_timer_callback_tag)
345
 
            self._update_timer_callback_tag = None
346
 
        for match in self.match_objects:
347
 
            match.remove()
348
 
        self.match_objects = ()
349
 
        if self.delete_hook is not None:
350
 
            self.delete_hook(self)
351
 
        return super(MandosClientWidget, self).delete(*args, **kwargs)
352
 
    
353
 
    def render(self, maxcolrow, focus=False):
354
 
        """Render differently if we have focus.
355
 
        This overrides the method from urwid.FlowWidget"""
356
 
        return self.current_widget(focus).render(maxcolrow,
357
 
                                                 focus=focus)
358
 
    
359
 
    def keypress(self, maxcolrow, key):
360
 
        """Handle keys.
361
 
        This overrides the method from urwid.FlowWidget"""
362
 
        if key == "+":
363
 
            self.proxy.Enable(dbus_interface = client_interface,
364
 
                              ignore_reply=True)
365
 
        elif key == "-":
366
 
            self.proxy.Disable(dbus_interface = client_interface,
367
 
                               ignore_reply=True)
368
 
        elif key == "a":
369
 
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
370
 
                               dbus_interface = client_interface,
371
 
                               ignore_reply=True)
372
 
        elif key == "d":
373
 
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
374
 
                                  dbus_interface = client_interface,
375
 
                               ignore_reply=True)
376
 
        elif key == "R" or key == "_" or key == "ctrl k":
377
 
            self.server_proxy_object.RemoveClient(self.proxy
378
 
                                                  .object_path,
379
 
                                                  ignore_reply=True)
380
 
        elif key == "s":
381
 
            self.proxy.StartChecker(dbus_interface = client_interface,
382
 
                                    ignore_reply=True)
383
 
        elif key == "S":
384
 
            self.proxy.StopChecker(dbus_interface = client_interface,
385
 
                                   ignore_reply=True)
386
 
        elif key == "C":
387
 
            self.proxy.CheckedOK(dbus_interface = client_interface,
388
 
                                 ignore_reply=True)
389
 
        # xxx
390
 
#         elif key == "p" or key == "=":
391
 
#             self.proxy.pause()
392
 
#         elif key == "u" or key == ":":
393
 
#             self.proxy.unpause()
394
 
#         elif key == "RET":
395
 
#             self.open()
396
 
        else:
397
 
            return key
398
 
    
399
 
    def property_changed(self, property=None, value=None,
400
 
                         *args, **kwargs):
401
 
        """Call self.update() if old value is not new value.
402
 
        This overrides the method from MandosClientPropertyCache"""
403
 
        property_name = unicode(property)
404
 
        old_value = self.properties.get(property_name)
405
 
        super(MandosClientWidget, self).property_changed(
406
 
            property=property, value=value, *args, **kwargs)
407
 
        if self.properties.get(property_name) != old_value:
408
 
            self.update()
409
 
 
410
 
 
411
 
class ConstrainedListBox(urwid.ListBox):
412
 
    """Like a normal urwid.ListBox, but will consume all "up" or
413
 
    "down" key presses, thus not allowing any containing widgets to
414
 
    use them as an excuse to shift focus away from this widget.
415
 
    """
416
 
    def keypress(self, maxcolrow, key):
417
 
        ret = super(ConstrainedListBox, self).keypress(maxcolrow, key)
418
 
        if ret in ("up", "down"):
419
 
            return
420
 
        return ret
421
 
 
422
 
 
423
 
class UserInterface(object):
424
 
    """This is the entire user interface - the whole screen
425
 
    with boxes, lists of client widgets, etc.
426
 
    """
427
 
    def __init__(self, max_log_length=1000):
428
 
        DBusGMainLoop(set_as_default=True)
429
 
        
430
 
        self.screen = urwid.curses_display.Screen()
431
 
        
432
 
        self.screen.register_palette((
433
 
                ("normal",
434
 
                 "default", "default", None),
435
 
                ("bold",
436
 
                 "default", "default", "bold"),
437
 
                ("underline-blink",
438
 
                 "default", "default", "underline"),
439
 
                ("standout",
440
 
                 "default", "default", "standout"),
441
 
                ("bold-underline-blink",
442
 
                 "default", "default", ("bold", "underline")),
443
 
                ("bold-standout",
444
 
                 "default", "default", ("bold", "standout")),
445
 
                ("underline-blink-standout",
446
 
                 "default", "default", ("underline", "standout")),
447
 
                ("bold-underline-blink-standout",
448
 
                 "default", "default", ("bold", "underline",
449
 
                                          "standout")),
450
 
                ))
451
 
        
452
 
        if urwid.supports_unicode():
453
 
            self.divider = "─" # \u2500
454
 
            #self.divider = "━" # \u2501
455
 
        else:
456
 
            #self.divider = "-" # \u002d
457
 
            self.divider = "_" # \u005f
458
 
        
459
 
        self.screen.start()
460
 
        
461
 
        self.size = self.screen.get_cols_rows()
462
 
        
463
 
        self.clients = urwid.SimpleListWalker([])
464
 
        self.clients_dict = {}
465
 
        
466
 
        # We will add Text widgets to this list
467
 
        self.log = []
468
 
        self.max_log_length = max_log_length
469
 
        
470
 
        # We keep a reference to the log widget so we can remove it
471
 
        # from the ListWalker without it getting destroyed
472
 
        self.logbox = ConstrainedListBox(self.log)
473
 
        
474
 
        # This keeps track of whether self.uilist currently has
475
 
        # self.logbox in it or not
476
 
        self.log_visible = True
477
 
        self.log_wrap = "any"
478
 
        
479
 
        self.rebuild()
480
 
        self.log_message_raw(("bold",
481
 
                              "Mandos Monitor version " + version))
482
 
        self.log_message_raw(("bold",
483
 
                              "q: Quit  ?: Help"))
484
 
        
485
 
        self.busname = domain + '.Mandos'
486
 
        self.main_loop = gobject.MainLoop()
487
 
    
488
 
    def client_not_found(self, fingerprint, address):
489
 
        self.log_message(("Client with address %s and fingerprint %s"
490
 
                          " could not be found" % (address,
491
 
                                                    fingerprint)))
492
 
    
493
 
    def rebuild(self):
494
 
        """This rebuilds the User Interface.
495
 
        Call this when the widget layout needs to change"""
496
 
        self.uilist = []
497
 
        #self.uilist.append(urwid.ListBox(self.clients))
498
 
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
499
 
                                                          clients),
500
 
                                       #header=urwid.Divider(),
501
 
                                       header=None,
502
 
                                       footer=
503
 
                                       urwid.Divider(div_char=
504
 
                                                     self.divider)))
505
 
        if self.log_visible:
506
 
            self.uilist.append(self.logbox)
507
 
        self.topwidget = urwid.Pile(self.uilist)
508
 
    
509
 
    def log_message(self, message):
510
 
        timestamp = datetime.datetime.now().isoformat()
511
 
        self.log_message_raw(timestamp + ": " + message)
512
 
    
513
 
    def log_message_raw(self, markup):
514
 
        """Add a log message to the log buffer."""
515
 
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
516
 
        if (self.max_log_length
517
 
            and len(self.log) > self.max_log_length):
518
 
            del self.log[0:len(self.log)-self.max_log_length-1]
519
 
        self.logbox.set_focus(len(self.logbox.body.contents),
520
 
                              coming_from="above")
521
 
        self.refresh()
522
 
    
523
 
    def toggle_log_display(self):
524
 
        """Toggle visibility of the log buffer."""
525
 
        self.log_visible = not self.log_visible
526
 
        self.rebuild()
527
 
        #self.log_message("Log visibility changed to: "
528
 
        #                 + unicode(self.log_visible))
529
 
    
530
 
    def change_log_display(self):
531
 
        """Change type of log display.
532
 
        Currently, this toggles wrapping of text lines."""
533
 
        if self.log_wrap == "clip":
534
 
            self.log_wrap = "any"
535
 
        else:
536
 
            self.log_wrap = "clip"
537
 
        for textwidget in self.log:
538
 
            textwidget.set_wrap_mode(self.log_wrap)
539
 
        #self.log_message("Wrap mode: " + self.log_wrap)
540
 
    
541
 
    def find_and_remove_client(self, path, name):
542
 
        """Find a client by its object path and remove it.
543
 
        
544
 
        This is connected to the ClientRemoved signal from the
545
 
        Mandos server object."""
546
 
        try:
547
 
            client = self.clients_dict[path]
548
 
        except KeyError:
549
 
            # not found?
550
 
            self.log_message("Unknown client %r (%r) removed", name,
551
 
                             path)
552
 
            return
553
 
        client.delete()
554
 
    
555
 
    def add_new_client(self, path):
556
 
        client_proxy_object = self.bus.get_object(self.busname, path)
557
 
        self.add_client(MandosClientWidget(server_proxy_object
558
 
                                           =self.mandos_serv,
559
 
                                           proxy_object
560
 
                                           =client_proxy_object,
561
 
                                           update_hook
562
 
                                           =self.refresh,
563
 
                                           delete_hook
564
 
                                           =self.remove_client,
565
 
                                           logger
566
 
                                           =self.log_message),
567
 
                        path=path)
568
 
    
569
 
    def add_client(self, client, path=None):
570
 
        self.clients.append(client)
571
 
        if path is None:
572
 
            path = client.proxy.object_path
573
 
        self.clients_dict[path] = client
574
 
        self.clients.sort(None, lambda c: c.properties["Name"])
575
 
        self.refresh()
576
 
    
577
 
    def remove_client(self, client, path=None):
578
 
        self.clients.remove(client)
579
 
        if path is None:
580
 
            path = client.proxy.object_path
581
 
        del self.clients_dict[path]
582
 
        if not self.clients_dict:
583
 
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
584
 
            # is completely emptied, we need to recreate it.
585
 
            self.clients = urwid.SimpleListWalker([])
586
 
            self.rebuild()
587
 
        self.refresh()
588
 
    
589
 
    def refresh(self):
590
 
        """Redraw the screen"""
591
 
        canvas = self.topwidget.render(self.size, focus=True)
592
 
        self.screen.draw_screen(self.size, canvas)
593
 
    
594
 
    def run(self):
595
 
        """Start the main loop and exit when it's done."""
596
 
        self.bus = dbus.SystemBus()
597
 
        mandos_dbus_objc = self.bus.get_object(
598
 
            self.busname, "/", follow_name_owner_changes=True)
599
 
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
600
 
                                          dbus_interface
601
 
                                          = server_interface)
602
 
        try:
603
 
            mandos_clients = (self.mandos_serv
604
 
                              .GetAllClientsWithProperties())
605
 
        except dbus.exceptions.DBusException:
606
 
            mandos_clients = dbus.Dictionary()
607
 
        
608
 
        (self.mandos_serv
609
 
         .connect_to_signal("ClientRemoved",
610
 
                            self.find_and_remove_client,
611
 
                            dbus_interface=server_interface,
612
 
                            byte_arrays=True))
613
 
        (self.mandos_serv
614
 
         .connect_to_signal("ClientAdded",
615
 
                            self.add_new_client,
616
 
                            dbus_interface=server_interface,
617
 
                            byte_arrays=True))
618
 
        (self.mandos_serv
619
 
         .connect_to_signal("ClientNotFound",
620
 
                            self.client_not_found,
621
 
                            dbus_interface=server_interface,
622
 
                            byte_arrays=True))
623
 
        for path, client in mandos_clients.iteritems():
624
 
            client_proxy_object = self.bus.get_object(self.busname,
625
 
                                                      path)
626
 
            self.add_client(MandosClientWidget(server_proxy_object
627
 
                                               =self.mandos_serv,
628
 
                                               proxy_object
629
 
                                               =client_proxy_object,
630
 
                                               properties=client,
631
 
                                               update_hook
632
 
                                               =self.refresh,
633
 
                                               delete_hook
634
 
                                               =self.remove_client,
635
 
                                               logger
636
 
                                               =self.log_message),
637
 
                            path=path)
638
 
 
639
 
        self.refresh()
640
 
        self._input_callback_tag = (gobject.io_add_watch
641
 
                                    (sys.stdin.fileno(),
642
 
                                     gobject.IO_IN,
643
 
                                     self.process_input))
644
 
        self.main_loop.run()
645
 
        # Main loop has finished, we should close everything now
646
 
        gobject.source_remove(self._input_callback_tag)
647
 
        self.screen.stop()
648
 
    
649
 
    def stop(self):
650
 
        self.main_loop.quit()
651
 
    
652
 
    def process_input(self, source, condition):
653
 
        keys = self.screen.get_input()
654
 
        translations = { "ctrl n": "down",      # Emacs
655
 
                         "ctrl p": "up",        # Emacs
656
 
                         "ctrl v": "page down", # Emacs
657
 
                         "meta v": "page up",   # Emacs
658
 
                         " ": "page down",      # less
659
 
                         "f": "page down",      # less
660
 
                         "b": "page up",        # less
661
 
                         "j": "down",           # vi
662
 
                         "k": "up",             # vi
663
 
                         }
664
 
        for key in keys:
665
 
            try:
666
 
                key = translations[key]
667
 
            except KeyError:    # :-)
668
 
                pass
669
 
            
670
 
            if key == "q" or key == "Q":
671
 
                self.stop()
672
 
                break
673
 
            elif key == "window resize":
674
 
                self.size = self.screen.get_cols_rows()
675
 
                self.refresh()
676
 
            elif key == "\f":  # Ctrl-L
677
 
                self.refresh()
678
 
            elif key == "l" or key == "D":
679
 
                self.toggle_log_display()
680
 
                self.refresh()
681
 
            elif key == "w" or key == "i":
682
 
                self.change_log_display()
683
 
                self.refresh()
684
 
            elif key == "?" or key == "f1" or key == "esc":
685
 
                if not self.log_visible:
686
 
                    self.log_visible = True
687
 
                    self.rebuild()
688
 
                self.log_message_raw(("bold",
689
 
                                      "  ".
690
 
                                      join(("q: Quit",
691
 
                                            "?: Help",
692
 
                                            "l: Log window toggle",
693
 
                                            "TAB: Switch window",
694
 
                                            "w: Wrap (log)"))))
695
 
                self.log_message_raw(("bold",
696
 
                                      "  "
697
 
                                      .join(("Clients:",
698
 
                                             "+: Enable",
699
 
                                             "-: Disable",
700
 
                                             "R: Remove",
701
 
                                             "s: Start new checker",
702
 
                                             "S: Stop checker",
703
 
                                             "C: Checker OK",
704
 
                                             "a: Approve",
705
 
                                             "d: Deny"))))
706
 
                self.refresh()
707
 
            elif key == "tab":
708
 
                if self.topwidget.get_focus() is self.logbox:
709
 
                    self.topwidget.set_focus(0)
710
 
                else:
711
 
                    self.topwidget.set_focus(self.logbox)
712
 
                self.refresh()
713
 
            #elif (key == "end" or key == "meta >" or key == "G"
714
 
            #      or key == ">"):
715
 
            #    pass            # xxx end-of-buffer
716
 
            #elif (key == "home" or key == "meta <" or key == "g"
717
 
            #      or key == "<"):
718
 
            #    pass            # xxx beginning-of-buffer
719
 
            #elif key == "ctrl e" or key == "$":
720
 
            #    pass            # xxx move-end-of-line
721
 
            #elif key == "ctrl a" or key == "^":
722
 
            #    pass            # xxx move-beginning-of-line
723
 
            #elif key == "ctrl b" or key == "meta (" or key == "h":
724
 
            #    pass            # xxx left
725
 
            #elif key == "ctrl f" or key == "meta )" or key == "l":
726
 
            #    pass            # xxx right
727
 
            #elif key == "a":
728
 
            #    pass            # scroll up log
729
 
            #elif key == "z":
730
 
            #    pass            # scroll down log
731
 
            elif self.topwidget.selectable():
732
 
                self.topwidget.keypress(self.size, key)
733
 
                self.refresh()
734
 
        return True
735
 
 
736
 
ui = UserInterface()
737
 
try:
738
 
    ui.run()
739
 
except KeyboardInterrupt:
740
 
    ui.screen.stop()
741
 
except Exception, e:
742
 
    ui.log_message(unicode(e))
743
 
    ui.screen.stop()
744
 
    raise