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  • Committer: Teddy Hogeborn
  • Date: 2012-05-03 20:16:22 UTC
  • Revision ID: teddy@recompile.se-20120503201622-d9yezi9t17i00lio
* mandos-ctl: Use new string format method.  Bug fix: --version now
              shows the program name.

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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 {0}'
 
176
        #            .format(self.properties["Name"]))
 
177
    
 
178
    def property_changed(self, property=None, value=None):
 
179
        super(self, MandosClientWidget).property_changed(property,
 
180
                                                         value)
 
181
        if property == "ApprovalPending":
 
182
            using_timer(bool(value))
 
183
        if property == "LastCheckerStatus":
 
184
            using_timer(value != 0)
 
185
            #self.logger('Checker for client {0} (command "{1}") was '
 
186
            #            ' successful'.format(self.properties["Name"],
 
187
            #                                 command))
 
188
    
 
189
    def using_timer(self, flag):
 
190
        """Call this method with True or False when timer should be
 
191
        activated or deactivated.
 
192
        """
 
193
        old = self._update_timer_callback_lock
 
194
        if flag:
 
195
            self._update_timer_callback_lock += 1
 
196
        else:
 
197
            self._update_timer_callback_lock -= 1
 
198
        if old == 0 and self._update_timer_callback_lock:
 
199
            # Will update the shown timer value every second
 
200
            self._update_timer_callback_tag = (gobject.timeout_add
 
201
                                               (1000,
 
202
                                                self.update_timer))
 
203
        elif old and self._update_timer_callback_lock == 0:
 
204
            gobject.source_remove(self._update_timer_callback_tag)
 
205
            self._update_timer_callback_tag = None
 
206
    
 
207
    def checker_completed(self, exitstatus, condition, command):
 
208
        if exitstatus == 0:
 
209
            self.update()
 
210
            return
 
211
        # Checker failed
 
212
        if os.WIFEXITED(condition):
 
213
            self.logger('Checker for client {0} (command "{1}")'
 
214
                        ' failed with exit code {2}'
 
215
                        .format(self.properties["Name"], command,
 
216
                                os.WEXITSTATUS(condition)))
 
217
        elif os.WIFSIGNALED(condition):
 
218
            self.logger('Checker for client {0} (command "{1}") was'
 
219
                        ' killed by signal {2}'
 
220
                        .format(self.properties["Name"], command,
 
221
                                os.WTERMSIG(condition)))
 
222
        elif os.WCOREDUMP(condition):
 
223
            self.logger('Checker for client {0} (command "{1}")'
 
224
                        ' dumped core'
 
225
                        .format(self.properties["Name"], command))
 
226
        else:
 
227
            self.logger('Checker for client {0} completed'
 
228
                        ' mysteriously'
 
229
                        .format(self.properties["Name"]))
 
230
        self.update()
 
231
    
 
232
    def checker_started(self, command):
 
233
        """Server signals that a checker started. This could be useful
 
234
           to log in the future. """
 
235
        #self.logger('Client {0} started checker "{1}"'
 
236
        #            .format(self.properties["Name"],
 
237
        #                    unicode(command)))
 
238
        pass
 
239
    
 
240
    def got_secret(self):
 
241
        self.logger('Client {0} received its secret'
 
242
                    .format(self.properties["Name"]))
 
243
    
 
244
    def need_approval(self, timeout, default):
 
245
        if not default:
 
246
            message = 'Client {0} needs approval within {1} seconds'
 
247
        else:
 
248
            message = 'Client {0} will get its secret in {1} seconds'
 
249
        self.logger(message.format(self.properties["Name"],
 
250
                                   timeout/1000))
 
251
        self.using_timer(True)
 
252
    
 
253
    def rejected(self, reason):
 
254
        self.logger('Client {0} was rejected; reason: {1}'
 
255
                    .format(self.properties["Name"], reason))
 
256
    
 
257
    def selectable(self):
 
258
        """Make this a "selectable" widget.
 
259
        This overrides the method from urwid.FlowWidget."""
 
260
        return True
 
261
    
 
262
    def rows(self, maxcolrow, focus=False):
 
263
        """How many rows this widget will occupy might depend on
 
264
        whether we have focus or not.
 
265
        This overrides the method from urwid.FlowWidget"""
 
266
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
267
    
 
268
    def current_widget(self, focus=False):
 
269
        if focus or self.opened:
 
270
            return self._focus_widget
 
271
        return self._widget
 
272
    
 
273
    def update(self):
 
274
        "Called when what is visible on the screen should be updated."
 
275
        # How to add standout mode to a style
 
276
        with_standout = { "normal": "standout",
 
277
                          "bold": "bold-standout",
 
278
                          "underline-blink":
 
279
                              "underline-blink-standout",
 
280
                          "bold-underline-blink":
 
281
                              "bold-underline-blink-standout",
 
282
                          }
 
283
 
 
284
        # Rebuild focus and non-focus widgets using current properties
 
285
 
 
286
        # Base part of a client. Name!
 
287
        base = '{name}: '.format(name=self.properties["Name"])
 
288
        if not self.properties["Enabled"]:
 
289
            message = "DISABLED"
 
290
        elif self.properties["ApprovalPending"]:
 
291
            timeout = datetime.timedelta(milliseconds
 
292
                                         = self.properties
 
293
                                         ["ApprovalDelay"])
 
294
            last_approval_request = isoformat_to_datetime(
 
295
                self.properties["LastApprovalRequest"])
 
296
            if last_approval_request is not None:
 
297
                timer = timeout - (datetime.datetime.utcnow()
 
298
                                   - last_approval_request)
 
299
            else:
 
300
                timer = datetime.timedelta()
 
301
            if self.properties["ApprovedByDefault"]:
 
302
                message = "Approval in {0}. (d)eny?"
 
303
            else:
 
304
                message = "Denial in {0}. (a)pprove?"
 
305
            message = message.format(unicode(timer).rsplit(".", 1)[0])
 
306
        elif self.properties["LastCheckerStatus"] != 0:
 
307
            # When checker has failed, print a timer until client expires
 
308
            expires = self.properties["Expires"]
 
309
            if expires == "":
 
310
                timer = datetime.timedelta(0)
 
311
            else:
 
312
                expires = datetime.datetime.strptime(expires,
 
313
                                                     '%Y-%m-%dT%H:%M:%S.%f')
 
314
                timer = expires - datetime.datetime.utcnow()
 
315
            message = ('A checker has failed! Time until client'
 
316
                       ' gets disabled: {0}'
 
317
                       .format(unicode(timer).rsplit(".", 1)[0]))
 
318
        else:
 
319
            message = "enabled"
 
320
        self._text = "{0}{1}".format(base, message)
 
321
            
 
322
        if not urwid.supports_unicode():
 
323
            self._text = self._text.encode("ascii", "replace")
 
324
        textlist = [("normal", self._text)]
 
325
        self._text_widget.set_text(textlist)
 
326
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
327
                                           text[1])
 
328
                                          if isinstance(text, tuple)
 
329
                                          else text
 
330
                                          for text in textlist])
 
331
        self._widget = self._text_widget
 
332
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
333
                                            "standout")
 
334
        # Run update hook, if any
 
335
        if self.update_hook is not None:
 
336
            self.update_hook()
 
337
    
 
338
    def update_timer(self):
 
339
        """called by gobject. Will indefinitely loop until
 
340
        gobject.source_remove() on tag is called"""
 
341
        self.update()
 
342
        return True             # Keep calling this
 
343
    
 
344
    def delete(self, *args, **kwargs):
 
345
        if self._update_timer_callback_tag is not None:
 
346
            gobject.source_remove(self._update_timer_callback_tag)
 
347
            self._update_timer_callback_tag = None
 
348
        for match in self.match_objects:
 
349
            match.remove()
 
350
        self.match_objects = ()
 
351
        if self.delete_hook is not None:
 
352
            self.delete_hook(self)
 
353
        return super(MandosClientWidget, self).delete(*args, **kwargs)
 
354
    
 
355
    def render(self, maxcolrow, focus=False):
 
356
        """Render differently if we have focus.
 
357
        This overrides the method from urwid.FlowWidget"""
 
358
        return self.current_widget(focus).render(maxcolrow,
 
359
                                                 focus=focus)
 
360
    
 
361
    def keypress(self, maxcolrow, key):
 
362
        """Handle keys.
 
363
        This overrides the method from urwid.FlowWidget"""
 
364
        if key == "+":
 
365
            self.proxy.Enable(dbus_interface = client_interface,
 
366
                              ignore_reply=True)
 
367
        elif key == "-":
 
368
            self.proxy.Disable(dbus_interface = client_interface,
 
369
                               ignore_reply=True)
 
370
        elif key == "a":
 
371
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
372
                               dbus_interface = client_interface,
 
373
                               ignore_reply=True)
 
374
        elif key == "d":
 
375
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
376
                                  dbus_interface = client_interface,
 
377
                               ignore_reply=True)
 
378
        elif key == "R" or key == "_" or key == "ctrl k":
 
379
            self.server_proxy_object.RemoveClient(self.proxy
 
380
                                                  .object_path,
 
381
                                                  ignore_reply=True)
 
382
        elif key == "s":
 
383
            self.proxy.StartChecker(dbus_interface = client_interface,
 
384
                                    ignore_reply=True)
 
385
        elif key == "S":
 
386
            self.proxy.StopChecker(dbus_interface = client_interface,
 
387
                                   ignore_reply=True)
 
388
        elif key == "C":
 
389
            self.proxy.CheckedOK(dbus_interface = client_interface,
 
390
                                 ignore_reply=True)
 
391
        # xxx
 
392
#         elif key == "p" or key == "=":
 
393
#             self.proxy.pause()
 
394
#         elif key == "u" or key == ":":
 
395
#             self.proxy.unpause()
 
396
#         elif key == "RET":
 
397
#             self.open()
 
398
        else:
 
399
            return key
 
400
    
 
401
    def property_changed(self, property=None, value=None,
 
402
                         *args, **kwargs):
 
403
        """Call self.update() if old value is not new value.
 
404
        This overrides the method from MandosClientPropertyCache"""
 
405
        property_name = unicode(property)
 
406
        old_value = self.properties.get(property_name)
 
407
        super(MandosClientWidget, self).property_changed(
 
408
            property=property, value=value, *args, **kwargs)
 
409
        if self.properties.get(property_name) != old_value:
 
410
            self.update()
 
411
 
 
412
 
 
413
class ConstrainedListBox(urwid.ListBox):
 
414
    """Like a normal urwid.ListBox, but will consume all "up" or
 
415
    "down" key presses, thus not allowing any containing widgets to
 
416
    use them as an excuse to shift focus away from this widget.
 
417
    """
 
418
    def keypress(self, maxcolrow, key):
 
419
        ret = super(ConstrainedListBox, self).keypress(maxcolrow, key)
 
420
        if ret in ("up", "down"):
 
421
            return
 
422
        return ret
 
423
 
 
424
 
 
425
class UserInterface(object):
 
426
    """This is the entire user interface - the whole screen
 
427
    with boxes, lists of client widgets, etc.
 
428
    """
 
429
    def __init__(self, max_log_length=1000):
 
430
        DBusGMainLoop(set_as_default=True)
 
431
        
 
432
        self.screen = urwid.curses_display.Screen()
 
433
        
 
434
        self.screen.register_palette((
 
435
                ("normal",
 
436
                 "default", "default", None),
 
437
                ("bold",
 
438
                 "default", "default", "bold"),
 
439
                ("underline-blink",
 
440
                 "default", "default", "underline"),
 
441
                ("standout",
 
442
                 "default", "default", "standout"),
 
443
                ("bold-underline-blink",
 
444
                 "default", "default", ("bold", "underline")),
 
445
                ("bold-standout",
 
446
                 "default", "default", ("bold", "standout")),
 
447
                ("underline-blink-standout",
 
448
                 "default", "default", ("underline", "standout")),
 
449
                ("bold-underline-blink-standout",
 
450
                 "default", "default", ("bold", "underline",
 
451
                                          "standout")),
 
452
                ))
 
453
        
 
454
        if urwid.supports_unicode():
 
455
            self.divider = "─" # \u2500
 
456
            #self.divider = "━" # \u2501
 
457
        else:
 
458
            #self.divider = "-" # \u002d
 
459
            self.divider = "_" # \u005f
 
460
        
 
461
        self.screen.start()
 
462
        
 
463
        self.size = self.screen.get_cols_rows()
 
464
        
 
465
        self.clients = urwid.SimpleListWalker([])
 
466
        self.clients_dict = {}
 
467
        
 
468
        # We will add Text widgets to this list
 
469
        self.log = []
 
470
        self.max_log_length = max_log_length
 
471
        
 
472
        # We keep a reference to the log widget so we can remove it
 
473
        # from the ListWalker without it getting destroyed
 
474
        self.logbox = ConstrainedListBox(self.log)
 
475
        
 
476
        # This keeps track of whether self.uilist currently has
 
477
        # self.logbox in it or not
 
478
        self.log_visible = True
 
479
        self.log_wrap = "any"
 
480
        
 
481
        self.rebuild()
 
482
        self.log_message_raw(("bold",
 
483
                              "Mandos Monitor version " + version))
 
484
        self.log_message_raw(("bold",
 
485
                              "q: Quit  ?: Help"))
 
486
        
 
487
        self.busname = domain + '.Mandos'
 
488
        self.main_loop = gobject.MainLoop()
 
489
    
 
490
    def client_not_found(self, fingerprint, address):
 
491
        self.log_message("Client with address {0} and fingerprint"
 
492
                         " {1} could not be found"
 
493
                         .format(address, fingerprint))
 
494
    
 
495
    def rebuild(self):
 
496
        """This rebuilds the User Interface.
 
497
        Call this when the widget layout needs to change"""
 
498
        self.uilist = []
 
499
        #self.uilist.append(urwid.ListBox(self.clients))
 
500
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
501
                                                          clients),
 
502
                                       #header=urwid.Divider(),
 
503
                                       header=None,
 
504
                                       footer=
 
505
                                       urwid.Divider(div_char=
 
506
                                                     self.divider)))
 
507
        if self.log_visible:
 
508
            self.uilist.append(self.logbox)
 
509
        self.topwidget = urwid.Pile(self.uilist)
 
510
    
 
511
    def log_message(self, message):
 
512
        timestamp = datetime.datetime.now().isoformat()
 
513
        self.log_message_raw(timestamp + ": " + message)
 
514
    
 
515
    def log_message_raw(self, markup):
 
516
        """Add a log message to the log buffer."""
 
517
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
518
        if (self.max_log_length
 
519
            and len(self.log) > self.max_log_length):
 
520
            del self.log[0:len(self.log)-self.max_log_length-1]
 
521
        self.logbox.set_focus(len(self.logbox.body.contents),
 
522
                              coming_from="above")
 
523
        self.refresh()
 
524
    
 
525
    def toggle_log_display(self):
 
526
        """Toggle visibility of the log buffer."""
 
527
        self.log_visible = not self.log_visible
 
528
        self.rebuild()
 
529
        #self.log_message("Log visibility changed to: "
 
530
        #                 + unicode(self.log_visible))
 
531
    
 
532
    def change_log_display(self):
 
533
        """Change type of log display.
 
534
        Currently, this toggles wrapping of text lines."""
 
535
        if self.log_wrap == "clip":
 
536
            self.log_wrap = "any"
 
537
        else:
 
538
            self.log_wrap = "clip"
 
539
        for textwidget in self.log:
 
540
            textwidget.set_wrap_mode(self.log_wrap)
 
541
        #self.log_message("Wrap mode: " + self.log_wrap)
 
542
    
 
543
    def find_and_remove_client(self, path, name):
 
544
        """Find a client by its object path and remove it.
 
545
        
 
546
        This is connected to the ClientRemoved signal from the
 
547
        Mandos server object."""
 
548
        try:
 
549
            client = self.clients_dict[path]
 
550
        except KeyError:
 
551
            # not found?
 
552
            self.log_message("Unknown client {0!r} ({1!r}) removed"
 
553
                             .format(name, path))
 
554
            return
 
555
        client.delete()
 
556
    
 
557
    def add_new_client(self, path):
 
558
        client_proxy_object = self.bus.get_object(self.busname, path)
 
559
        self.add_client(MandosClientWidget(server_proxy_object
 
560
                                           =self.mandos_serv,
 
561
                                           proxy_object
 
562
                                           =client_proxy_object,
 
563
                                           update_hook
 
564
                                           =self.refresh,
 
565
                                           delete_hook
 
566
                                           =self.remove_client,
 
567
                                           logger
 
568
                                           =self.log_message),
 
569
                        path=path)
 
570
    
 
571
    def add_client(self, client, path=None):
 
572
        self.clients.append(client)
 
573
        if path is None:
 
574
            path = client.proxy.object_path
 
575
        self.clients_dict[path] = client
 
576
        self.clients.sort(None, lambda c: c.properties["Name"])
 
577
        self.refresh()
 
578
    
 
579
    def remove_client(self, client, path=None):
 
580
        self.clients.remove(client)
 
581
        if path is None:
 
582
            path = client.proxy.object_path
 
583
        del self.clients_dict[path]
 
584
        if not self.clients_dict:
 
585
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
 
586
            # is completely emptied, we need to recreate it.
 
587
            self.clients = urwid.SimpleListWalker([])
 
588
            self.rebuild()
 
589
        self.refresh()
 
590
    
 
591
    def refresh(self):
 
592
        """Redraw the screen"""
 
593
        canvas = self.topwidget.render(self.size, focus=True)
 
594
        self.screen.draw_screen(self.size, canvas)
 
595
    
 
596
    def run(self):
 
597
        """Start the main loop and exit when it's done."""
 
598
        self.bus = dbus.SystemBus()
 
599
        mandos_dbus_objc = self.bus.get_object(
 
600
            self.busname, "/", follow_name_owner_changes=True)
 
601
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
 
602
                                          dbus_interface
 
603
                                          = server_interface)
 
604
        try:
 
605
            mandos_clients = (self.mandos_serv
 
606
                              .GetAllClientsWithProperties())
 
607
        except dbus.exceptions.DBusException:
 
608
            mandos_clients = dbus.Dictionary()
 
609
        
 
610
        (self.mandos_serv
 
611
         .connect_to_signal("ClientRemoved",
 
612
                            self.find_and_remove_client,
 
613
                            dbus_interface=server_interface,
 
614
                            byte_arrays=True))
 
615
        (self.mandos_serv
 
616
         .connect_to_signal("ClientAdded",
 
617
                            self.add_new_client,
 
618
                            dbus_interface=server_interface,
 
619
                            byte_arrays=True))
 
620
        (self.mandos_serv
 
621
         .connect_to_signal("ClientNotFound",
 
622
                            self.client_not_found,
 
623
                            dbus_interface=server_interface,
 
624
                            byte_arrays=True))
 
625
        for path, client in mandos_clients.iteritems():
 
626
            client_proxy_object = self.bus.get_object(self.busname,
 
627
                                                      path)
 
628
            self.add_client(MandosClientWidget(server_proxy_object
 
629
                                               =self.mandos_serv,
 
630
                                               proxy_object
 
631
                                               =client_proxy_object,
 
632
                                               properties=client,
 
633
                                               update_hook
 
634
                                               =self.refresh,
 
635
                                               delete_hook
 
636
                                               =self.remove_client,
 
637
                                               logger
 
638
                                               =self.log_message),
 
639
                            path=path)
 
640
 
 
641
        self.refresh()
 
642
        self._input_callback_tag = (gobject.io_add_watch
 
643
                                    (sys.stdin.fileno(),
 
644
                                     gobject.IO_IN,
 
645
                                     self.process_input))
 
646
        self.main_loop.run()
 
647
        # Main loop has finished, we should close everything now
 
648
        gobject.source_remove(self._input_callback_tag)
 
649
        self.screen.stop()
 
650
    
 
651
    def stop(self):
 
652
        self.main_loop.quit()
 
653
    
 
654
    def process_input(self, source, condition):
 
655
        keys = self.screen.get_input()
 
656
        translations = { "ctrl n": "down",      # Emacs
 
657
                         "ctrl p": "up",        # Emacs
 
658
                         "ctrl v": "page down", # Emacs
 
659
                         "meta v": "page up",   # Emacs
 
660
                         " ": "page down",      # less
 
661
                         "f": "page down",      # less
 
662
                         "b": "page up",        # less
 
663
                         "j": "down",           # vi
 
664
                         "k": "up",             # vi
 
665
                         }
 
666
        for key in keys:
 
667
            try:
 
668
                key = translations[key]
 
669
            except KeyError:    # :-)
 
670
                pass
 
671
            
 
672
            if key == "q" or key == "Q":
 
673
                self.stop()
 
674
                break
 
675
            elif key == "window resize":
 
676
                self.size = self.screen.get_cols_rows()
 
677
                self.refresh()
 
678
            elif key == "\f":  # Ctrl-L
 
679
                self.refresh()
 
680
            elif key == "l" or key == "D":
 
681
                self.toggle_log_display()
 
682
                self.refresh()
 
683
            elif key == "w" or key == "i":
 
684
                self.change_log_display()
 
685
                self.refresh()
 
686
            elif key == "?" or key == "f1" or key == "esc":
 
687
                if not self.log_visible:
 
688
                    self.log_visible = True
 
689
                    self.rebuild()
 
690
                self.log_message_raw(("bold",
 
691
                                      "  ".
 
692
                                      join(("q: Quit",
 
693
                                            "?: Help",
 
694
                                            "l: Log window toggle",
 
695
                                            "TAB: Switch window",
 
696
                                            "w: Wrap (log)"))))
 
697
                self.log_message_raw(("bold",
 
698
                                      "  "
 
699
                                      .join(("Clients:",
 
700
                                             "+: Enable",
 
701
                                             "-: Disable",
 
702
                                             "R: Remove",
 
703
                                             "s: Start new checker",
 
704
                                             "S: Stop checker",
 
705
                                             "C: Checker OK",
 
706
                                             "a: Approve",
 
707
                                             "d: Deny"))))
 
708
                self.refresh()
 
709
            elif key == "tab":
 
710
                if self.topwidget.get_focus() is self.logbox:
 
711
                    self.topwidget.set_focus(0)
 
712
                else:
 
713
                    self.topwidget.set_focus(self.logbox)
 
714
                self.refresh()
 
715
            #elif (key == "end" or key == "meta >" or key == "G"
 
716
            #      or key == ">"):
 
717
            #    pass            # xxx end-of-buffer
 
718
            #elif (key == "home" or key == "meta <" or key == "g"
 
719
            #      or key == "<"):
 
720
            #    pass            # xxx beginning-of-buffer
 
721
            #elif key == "ctrl e" or key == "$":
 
722
            #    pass            # xxx move-end-of-line
 
723
            #elif key == "ctrl a" or key == "^":
 
724
            #    pass            # xxx move-beginning-of-line
 
725
            #elif key == "ctrl b" or key == "meta (" or key == "h":
 
726
            #    pass            # xxx left
 
727
            #elif key == "ctrl f" or key == "meta )" or key == "l":
 
728
            #    pass            # xxx right
 
729
            #elif key == "a":
 
730
            #    pass            # scroll up log
 
731
            #elif key == "z":
 
732
            #    pass            # scroll down log
 
733
            elif self.topwidget.selectable():
 
734
                self.topwidget.keypress(self.size, key)
 
735
                self.refresh()
 
736
        return True
 
737
 
 
738
ui = UserInterface()
 
739
try:
 
740
    ui.run()
 
741
except KeyboardInterrupt:
 
742
    ui.screen.stop()
 
743
except Exception, e:
 
744
    ui.log_message(unicode(e))
 
745
    ui.screen.stop()
 
746
    raise