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  • Committer: Teddy Hogeborn
  • Date: 2016-03-17 20:40:55 UTC
  • mto: (237.7.594 trunk)
  • mto: This revision was merged to the branch mainline in revision 341.
  • Revision ID: teddy@recompile.se-20160317204055-bhsh5xsidq7w5cxu
Client: Fix plymouth agent; broken since 1.7.2.

Fix an very old memory bug in the plymouth agent (which has been
present since its apperance in version 1.2), but which was only
recently detected at run time due to the new -fsanitize=address
compile- time flag, which has been used since version 1.7.2.  This
detection of a memory access violation causes the program to abort,
making the Plymouth graphical boot system unable to accept interactive
input of passwords when using the Mandos client.

* plugins.d/plymouth.c (exec_and_wait): Fix memory allocation bug when
  allocating new_argv.  Also tolerate a zero-length argv.

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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 © 2009-2016 Teddy Hogeborn
 
7
# Copyright © 2009-2016 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
from gi.repository import GLib
 
43
 
 
44
import dbus
 
45
 
 
46
import locale
 
47
 
 
48
if sys.version_info.major == 2:
 
49
    str = unicode
 
50
 
 
51
locale.setlocale(locale.LC_ALL, '')
 
52
 
 
53
import logging
 
54
logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
 
55
 
 
56
# Some useful constants
 
57
domain = 'se.recompile'
 
58
server_interface = domain + '.Mandos'
 
59
client_interface = domain + '.Mandos.Client'
 
60
version = "1.7.6"
 
61
 
 
62
try:
 
63
    dbus.OBJECT_MANAGER_IFACE
 
64
except AttributeError:
 
65
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
66
 
 
67
def isoformat_to_datetime(iso):
 
68
    "Parse an ISO 8601 date string to a datetime.datetime()"
 
69
    if not iso:
 
70
        return None
 
71
    d, t = iso.split("T", 1)
 
72
    year, month, day = d.split("-", 2)
 
73
    hour, minute, second = t.split(":", 2)
 
74
    second, fraction = divmod(float(second), 1)
 
75
    return datetime.datetime(int(year),
 
76
                             int(month),
 
77
                             int(day),
 
78
                             int(hour),
 
79
                             int(minute),
 
80
                             int(second),           # Whole seconds
 
81
                             int(fraction*1000000)) # Microseconds
 
82
 
 
83
class MandosClientPropertyCache(object):
 
84
    """This wraps a Mandos Client D-Bus proxy object, caches the
 
85
    properties and calls a hook function when any of them are
 
86
    changed.
 
87
    """
 
88
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
89
        self.proxy = proxy_object # Mandos Client proxy object
 
90
        self.properties = dict() if properties is None else properties
 
91
        self.property_changed_match = (
 
92
            self.proxy.connect_to_signal("PropertiesChanged",
 
93
                                         self.properties_changed,
 
94
                                         dbus.PROPERTIES_IFACE,
 
95
                                         byte_arrays=True))
 
96
        
 
97
        if properties is None:
 
98
            self.properties.update(
 
99
                self.proxy.GetAll(client_interface,
 
100
                                  dbus_interface
 
101
                                  = dbus.PROPERTIES_IFACE))
 
102
        
 
103
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
104
    
 
105
    def properties_changed(self, interface, properties, invalidated):
 
106
        """This is called whenever we get a PropertiesChanged signal
 
107
        It updates the changed properties in the "properties" dict.
 
108
        """
 
109
        # Update properties dict with new value
 
110
        if interface == client_interface:
 
111
            self.properties.update(properties)
 
112
    
 
113
    def delete(self):
 
114
        self.property_changed_match.remove()
 
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, **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
        
 
134
        # The widget shown normally
 
135
        self._text_widget = urwid.Text("")
 
136
        # The widget shown when we have focus
 
137
        self._focus_text_widget = urwid.Text("")
 
138
        super(MandosClientWidget, self).__init__(**kwargs)
 
139
        self.update()
 
140
        self.opened = False
 
141
        
 
142
        self.match_objects = (
 
143
            self.proxy.connect_to_signal("CheckerCompleted",
 
144
                                         self.checker_completed,
 
145
                                         client_interface,
 
146
                                         byte_arrays=True),
 
147
            self.proxy.connect_to_signal("CheckerStarted",
 
148
                                         self.checker_started,
 
149
                                         client_interface,
 
150
                                         byte_arrays=True),
 
151
            self.proxy.connect_to_signal("GotSecret",
 
152
                                         self.got_secret,
 
153
                                         client_interface,
 
154
                                         byte_arrays=True),
 
155
            self.proxy.connect_to_signal("NeedApproval",
 
156
                                         self.need_approval,
 
157
                                         client_interface,
 
158
                                         byte_arrays=True),
 
159
            self.proxy.connect_to_signal("Rejected",
 
160
                                         self.rejected,
 
161
                                         client_interface,
 
162
                                         byte_arrays=True))
 
163
        self.logger('Created client {}'
 
164
                    .format(self.properties["Name"]), level=0)
 
165
    
 
166
    def using_timer(self, flag):
 
167
        """Call this method with True or False when timer should be
 
168
        activated or deactivated.
 
169
        """
 
170
        if flag and self._update_timer_callback_tag is None:
 
171
            # Will update the shown timer value every second
 
172
            self._update_timer_callback_tag = (GLib.timeout_add
 
173
                                               (1000,
 
174
                                                self.update_timer))
 
175
        elif not (flag or self._update_timer_callback_tag is None):
 
176
            GLib.source_remove(self._update_timer_callback_tag)
 
177
            self._update_timer_callback_tag = None
 
178
    
 
179
    def checker_completed(self, exitstatus, condition, command):
 
180
        if exitstatus == 0:
 
181
            self.logger('Checker for client {} (command "{}")'
 
182
                        ' succeeded'.format(self.properties["Name"],
 
183
                                            command), level=0)
 
184
            self.update()
 
185
            return
 
186
        # Checker failed
 
187
        if os.WIFEXITED(condition):
 
188
            self.logger('Checker for client {} (command "{}") failed'
 
189
                        ' with exit code {}'
 
190
                        .format(self.properties["Name"], command,
 
191
                                os.WEXITSTATUS(condition)))
 
192
        elif os.WIFSIGNALED(condition):
 
193
            self.logger('Checker for client {} (command "{}") was'
 
194
                        ' killed by signal {}'
 
195
                        .format(self.properties["Name"], command,
 
196
                                os.WTERMSIG(condition)))
 
197
        self.update()
 
198
    
 
199
    def checker_started(self, command):
 
200
        """Server signals that a checker started."""
 
201
        self.logger('Client {} started checker "{}"'
 
202
                    .format(self.properties["Name"],
 
203
                            command), level=0)
 
204
    
 
205
    def got_secret(self):
 
206
        self.logger('Client {} received its secret'
 
207
                    .format(self.properties["Name"]))
 
208
    
 
209
    def need_approval(self, timeout, default):
 
210
        if not default:
 
211
            message = 'Client {} needs approval within {} seconds'
 
212
        else:
 
213
            message = 'Client {} will get its secret in {} seconds'
 
214
        self.logger(message.format(self.properties["Name"],
 
215
                                   timeout/1000))
 
216
    
 
217
    def rejected(self, reason):
 
218
        self.logger('Client {} was rejected; reason: {}'
 
219
                    .format(self.properties["Name"], reason))
 
220
    
 
221
    def selectable(self):
 
222
        """Make this a "selectable" widget.
 
223
        This overrides the method from urwid.FlowWidget."""
 
224
        return True
 
225
    
 
226
    def rows(self, maxcolrow, focus=False):
 
227
        """How many rows this widget will occupy might depend on
 
228
        whether we have focus or not.
 
229
        This overrides the method from urwid.FlowWidget"""
 
230
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
231
    
 
232
    def current_widget(self, focus=False):
 
233
        if focus or self.opened:
 
234
            return self._focus_widget
 
235
        return self._widget
 
236
    
 
237
    def update(self):
 
238
        "Called when what is visible on the screen should be updated."
 
239
        # How to add standout mode to a style
 
240
        with_standout = { "normal": "standout",
 
241
                          "bold": "bold-standout",
 
242
                          "underline-blink":
 
243
                              "underline-blink-standout",
 
244
                          "bold-underline-blink":
 
245
                              "bold-underline-blink-standout",
 
246
                          }
 
247
        
 
248
        # Rebuild focus and non-focus widgets using current properties
 
249
        
 
250
        # Base part of a client. Name!
 
251
        base = '{name}: '.format(name=self.properties["Name"])
 
252
        if not self.properties["Enabled"]:
 
253
            message = "DISABLED"
 
254
            self.using_timer(False)
 
255
        elif self.properties["ApprovalPending"]:
 
256
            timeout = datetime.timedelta(milliseconds
 
257
                                         = self.properties
 
258
                                         ["ApprovalDelay"])
 
259
            last_approval_request = isoformat_to_datetime(
 
260
                self.properties["LastApprovalRequest"])
 
261
            if last_approval_request is not None:
 
262
                timer = max(timeout - (datetime.datetime.utcnow()
 
263
                                       - last_approval_request),
 
264
                            datetime.timedelta())
 
265
            else:
 
266
                timer = datetime.timedelta()
 
267
            if self.properties["ApprovedByDefault"]:
 
268
                message = "Approval in {}. (d)eny?"
 
269
            else:
 
270
                message = "Denial in {}. (a)pprove?"
 
271
            message = message.format(str(timer).rsplit(".", 1)[0])
 
272
            self.using_timer(True)
 
273
        elif self.properties["LastCheckerStatus"] != 0:
 
274
            # When checker has failed, show timer until client expires
 
275
            expires = self.properties["Expires"]
 
276
            if expires == "":
 
277
                timer = datetime.timedelta(0)
 
278
            else:
 
279
                expires = (datetime.datetime.strptime
 
280
                           (expires, '%Y-%m-%dT%H:%M:%S.%f'))
 
281
                timer = max(expires - datetime.datetime.utcnow(),
 
282
                            datetime.timedelta())
 
283
            message = ('A checker has failed! Time until client'
 
284
                       ' gets disabled: {}'
 
285
                       .format(str(timer).rsplit(".", 1)[0]))
 
286
            self.using_timer(True)
 
287
        else:
 
288
            message = "enabled"
 
289
            self.using_timer(False)
 
290
        self._text = "{}{}".format(base, message)
 
291
        
 
292
        if not urwid.supports_unicode():
 
293
            self._text = self._text.encode("ascii", "replace")
 
294
        textlist = [("normal", self._text)]
 
295
        self._text_widget.set_text(textlist)
 
296
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
297
                                           text[1])
 
298
                                          if isinstance(text, tuple)
 
299
                                          else text
 
300
                                          for text in textlist])
 
301
        self._widget = self._text_widget
 
302
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
303
                                            "standout")
 
304
        # Run update hook, if any
 
305
        if self.update_hook is not None:
 
306
            self.update_hook()
 
307
    
 
308
    def update_timer(self):
 
309
        """called by GLib. Will indefinitely loop until
 
310
        GLib.source_remove() on tag is called
 
311
        """
 
312
        self.update()
 
313
        return True             # Keep calling this
 
314
    
 
315
    def delete(self, **kwargs):
 
316
        if self._update_timer_callback_tag is not None:
 
317
            GLib.source_remove(self._update_timer_callback_tag)
 
318
            self._update_timer_callback_tag = None
 
319
        for match in self.match_objects:
 
320
            match.remove()
 
321
        self.match_objects = ()
 
322
        if self.delete_hook is not None:
 
323
            self.delete_hook(self)
 
324
        return super(MandosClientWidget, self).delete(**kwargs)
 
325
    
 
326
    def render(self, maxcolrow, focus=False):
 
327
        """Render differently if we have focus.
 
328
        This overrides the method from urwid.FlowWidget"""
 
329
        return self.current_widget(focus).render(maxcolrow,
 
330
                                                 focus=focus)
 
331
    
 
332
    def keypress(self, maxcolrow, key):
 
333
        """Handle keys.
 
334
        This overrides the method from urwid.FlowWidget"""
 
335
        if key == "+":
 
336
            self.proxy.Set(client_interface, "Enabled",
 
337
                           dbus.Boolean(True), ignore_reply = True,
 
338
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
339
        elif key == "-":
 
340
            self.proxy.Set(client_interface, "Enabled", False,
 
341
                           ignore_reply = True,
 
342
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
343
        elif key == "a":
 
344
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
345
                               dbus_interface = client_interface,
 
346
                               ignore_reply=True)
 
347
        elif key == "d":
 
348
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
349
                                  dbus_interface = client_interface,
 
350
                               ignore_reply=True)
 
351
        elif key == "R" or key == "_" or key == "ctrl k":
 
352
            self.server_proxy_object.RemoveClient(self.proxy
 
353
                                                  .object_path,
 
354
                                                  ignore_reply=True)
 
355
        elif key == "s":
 
356
            self.proxy.Set(client_interface, "CheckerRunning",
 
357
                           dbus.Boolean(True), ignore_reply = True,
 
358
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
359
        elif key == "S":
 
360
            self.proxy.Set(client_interface, "CheckerRunning",
 
361
                           dbus.Boolean(False), ignore_reply = True,
 
362
                           dbus_interface = dbus.PROPERTIES_IFACE)
 
363
        elif key == "C":
 
364
            self.proxy.CheckedOK(dbus_interface = client_interface,
 
365
                                 ignore_reply=True)
 
366
        # xxx
 
367
#         elif key == "p" or key == "=":
 
368
#             self.proxy.pause()
 
369
#         elif key == "u" or key == ":":
 
370
#             self.proxy.unpause()
 
371
#         elif key == "RET":
 
372
#             self.open()
 
373
        else:
 
374
            return key
 
375
    
 
376
    def properties_changed(self, interface, properties, invalidated):
 
377
        """Call self.update() if any properties changed.
 
378
        This overrides the method from MandosClientPropertyCache"""
 
379
        old_values = { key: self.properties.get(key)
 
380
                       for key in properties.keys() }
 
381
        super(MandosClientWidget, self).properties_changed(
 
382
            interface, properties, invalidated)
 
383
        if any(old_values[key] != self.properties.get(key)
 
384
               for key in old_values):
 
385
            self.update()
 
386
 
 
387
 
 
388
class ConstrainedListBox(urwid.ListBox):
 
389
    """Like a normal urwid.ListBox, but will consume all "up" or
 
390
    "down" key presses, thus not allowing any containing widgets to
 
391
    use them as an excuse to shift focus away from this widget.
 
392
    """
 
393
    def keypress(self, *args, **kwargs):
 
394
        ret = super(ConstrainedListBox, self).keypress(*args, **kwargs)
 
395
        if ret in ("up", "down"):
 
396
            return
 
397
        return ret
 
398
 
 
399
 
 
400
class UserInterface(object):
 
401
    """This is the entire user interface - the whole screen
 
402
    with boxes, lists of client widgets, etc.
 
403
    """
 
404
    def __init__(self, max_log_length=1000, log_level=1):
 
405
        DBusGMainLoop(set_as_default=True)
 
406
        
 
407
        self.screen = urwid.curses_display.Screen()
 
408
        
 
409
        self.screen.register_palette((
 
410
                ("normal",
 
411
                 "default", "default", None),
 
412
                ("bold",
 
413
                 "bold", "default", "bold"),
 
414
                ("underline-blink",
 
415
                 "underline,blink", "default", "underline,blink"),
 
416
                ("standout",
 
417
                 "standout", "default", "standout"),
 
418
                ("bold-underline-blink",
 
419
                 "bold,underline,blink", "default", "bold,underline,blink"),
 
420
                ("bold-standout",
 
421
                 "bold,standout", "default", "bold,standout"),
 
422
                ("underline-blink-standout",
 
423
                 "underline,blink,standout", "default",
 
424
                 "underline,blink,standout"),
 
425
                ("bold-underline-blink-standout",
 
426
                 "bold,underline,blink,standout", "default",
 
427
                 "bold,underline,blink,standout"),
 
428
                ))
 
429
        
 
430
        if urwid.supports_unicode():
 
431
            self.divider = "─" # \u2500
 
432
            #self.divider = "━" # \u2501
 
433
        else:
 
434
            #self.divider = "-" # \u002d
 
435
            self.divider = "_" # \u005f
 
436
        
 
437
        self.screen.start()
 
438
        
 
439
        self.size = self.screen.get_cols_rows()
 
440
        
 
441
        self.clients = urwid.SimpleListWalker([])
 
442
        self.clients_dict = {}
 
443
        
 
444
        # We will add Text widgets to this list
 
445
        self.log = []
 
446
        self.max_log_length = max_log_length
 
447
        
 
448
        self.log_level = log_level
 
449
        
 
450
        # We keep a reference to the log widget so we can remove it
 
451
        # from the ListWalker without it getting destroyed
 
452
        self.logbox = ConstrainedListBox(self.log)
 
453
        
 
454
        # This keeps track of whether self.uilist currently has
 
455
        # self.logbox in it or not
 
456
        self.log_visible = True
 
457
        self.log_wrap = "any"
 
458
        
 
459
        self.rebuild()
 
460
        self.log_message_raw(("bold",
 
461
                              "Mandos Monitor version " + version))
 
462
        self.log_message_raw(("bold",
 
463
                              "q: Quit  ?: Help"))
 
464
        
 
465
        self.busname = domain + '.Mandos'
 
466
        self.main_loop = GLib.MainLoop()
 
467
    
 
468
    def client_not_found(self, fingerprint, address):
 
469
        self.log_message("Client with address {} and fingerprint {}"
 
470
                         " could not be found"
 
471
                         .format(address, fingerprint))
 
472
    
 
473
    def rebuild(self):
 
474
        """This rebuilds the User Interface.
 
475
        Call this when the widget layout needs to change"""
 
476
        self.uilist = []
 
477
        #self.uilist.append(urwid.ListBox(self.clients))
 
478
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
479
                                                          clients),
 
480
                                       #header=urwid.Divider(),
 
481
                                       header=None,
 
482
                                       footer=
 
483
                                       urwid.Divider(div_char=
 
484
                                                     self.divider)))
 
485
        if self.log_visible:
 
486
            self.uilist.append(self.logbox)
 
487
        self.topwidget = urwid.Pile(self.uilist)
 
488
    
 
489
    def log_message(self, message, level=1):
 
490
        """Log message formatted with timestamp"""
 
491
        if level < self.log_level:
 
492
            return
 
493
        timestamp = datetime.datetime.now().isoformat()
 
494
        self.log_message_raw("{}: {}".format(timestamp, message),
 
495
                             level=level)
 
496
    
 
497
    def log_message_raw(self, markup, level=1):
 
498
        """Add a log message to the log buffer."""
 
499
        if level < self.log_level:
 
500
            return
 
501
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
502
        if (self.max_log_length
 
503
            and len(self.log) > self.max_log_length):
 
504
            del self.log[0:len(self.log)-self.max_log_length-1]
 
505
        self.logbox.set_focus(len(self.logbox.body.contents),
 
506
                              coming_from="above")
 
507
        self.refresh()
 
508
    
 
509
    def toggle_log_display(self):
 
510
        """Toggle visibility of the log buffer."""
 
511
        self.log_visible = not self.log_visible
 
512
        self.rebuild()
 
513
        self.log_message("Log visibility changed to: {}"
 
514
                         .format(self.log_visible), level=0)
 
515
    
 
516
    def change_log_display(self):
 
517
        """Change type of log display.
 
518
        Currently, this toggles wrapping of text lines."""
 
519
        if self.log_wrap == "clip":
 
520
            self.log_wrap = "any"
 
521
        else:
 
522
            self.log_wrap = "clip"
 
523
        for textwidget in self.log:
 
524
            textwidget.set_wrap_mode(self.log_wrap)
 
525
        self.log_message("Wrap mode: {}".format(self.log_wrap),
 
526
                         level=0)
 
527
    
 
528
    def find_and_remove_client(self, path, interfaces):
 
529
        """Find a client by its object path and remove it.
 
530
        
 
531
        This is connected to the InterfacesRemoved signal from the
 
532
        Mandos server object."""
 
533
        if client_interface not in interfaces:
 
534
            # Not a Mandos client object; ignore
 
535
            return
 
536
        try:
 
537
            client = self.clients_dict[path]
 
538
        except KeyError:
 
539
            # not found?
 
540
            self.log_message("Unknown client {!r} removed"
 
541
                             .format(path))
 
542
            return
 
543
        client.delete()
 
544
    
 
545
    def add_new_client(self, path, ifs_and_props):
 
546
        """Find a client by its object path and remove it.
 
547
        
 
548
        This is connected to the InterfacesAdded signal from the
 
549
        Mandos server object.
 
550
        """
 
551
        if client_interface not in ifs_and_props:
 
552
            # Not a Mandos client object; ignore
 
553
            return
 
554
        client_proxy_object = self.bus.get_object(self.busname, path)
 
555
        self.add_client(MandosClientWidget(server_proxy_object
 
556
                                           =self.mandos_serv,
 
557
                                           proxy_object
 
558
                                           =client_proxy_object,
 
559
                                           update_hook
 
560
                                           =self.refresh,
 
561
                                           delete_hook
 
562
                                           =self.remove_client,
 
563
                                           logger
 
564
                                           =self.log_message,
 
565
                                           properties
 
566
                                           = dict(ifs_and_props[
 
567
                                               client_interface])),
 
568
                        path=path)
 
569
    
 
570
    def add_client(self, client, path=None):
 
571
        self.clients.append(client)
 
572
        if path is None:
 
573
            path = client.proxy.object_path
 
574
        self.clients_dict[path] = client
 
575
        self.clients.sort(key=lambda c: c.properties["Name"])
 
576
        self.refresh()
 
577
    
 
578
    def remove_client(self, client, path=None):
 
579
        self.clients.remove(client)
 
580
        if path is None:
 
581
            path = client.proxy.object_path
 
582
        del self.clients_dict[path]
 
583
        self.refresh()
 
584
    
 
585
    def refresh(self):
 
586
        """Redraw the screen"""
 
587
        canvas = self.topwidget.render(self.size, focus=True)
 
588
        self.screen.draw_screen(self.size, canvas)
 
589
    
 
590
    def run(self):
 
591
        """Start the main loop and exit when it's done."""
 
592
        self.bus = dbus.SystemBus()
 
593
        mandos_dbus_objc = self.bus.get_object(
 
594
            self.busname, "/", follow_name_owner_changes=True)
 
595
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
 
596
                                          dbus_interface
 
597
                                          = server_interface)
 
598
        try:
 
599
            mandos_clients = (self.mandos_serv
 
600
                              .GetAllClientsWithProperties())
 
601
            if not mandos_clients:
 
602
                self.log_message_raw(("bold", "Note: Server has no clients."))
 
603
        except dbus.exceptions.DBusException:
 
604
            self.log_message_raw(("bold", "Note: No Mandos server running."))
 
605
            mandos_clients = dbus.Dictionary()
 
606
        
 
607
        (self.mandos_serv
 
608
         .connect_to_signal("InterfacesRemoved",
 
609
                            self.find_and_remove_client,
 
610
                            dbus_interface
 
611
                            = dbus.OBJECT_MANAGER_IFACE,
 
612
                            byte_arrays=True))
 
613
        (self.mandos_serv
 
614
         .connect_to_signal("InterfacesAdded",
 
615
                            self.add_new_client,
 
616
                            dbus_interface
 
617
                            = dbus.OBJECT_MANAGER_IFACE,
 
618
                            byte_arrays=True))
 
619
        (self.mandos_serv
 
620
         .connect_to_signal("ClientNotFound",
 
621
                            self.client_not_found,
 
622
                            dbus_interface=server_interface,
 
623
                            byte_arrays=True))
 
624
        for path, client in mandos_clients.items():
 
625
            client_proxy_object = self.bus.get_object(self.busname,
 
626
                                                      path)
 
627
            self.add_client(MandosClientWidget(server_proxy_object
 
628
                                               =self.mandos_serv,
 
629
                                               proxy_object
 
630
                                               =client_proxy_object,
 
631
                                               properties=client,
 
632
                                               update_hook
 
633
                                               =self.refresh,
 
634
                                               delete_hook
 
635
                                               =self.remove_client,
 
636
                                               logger
 
637
                                               =self.log_message),
 
638
                            path=path)
 
639
        
 
640
        self.refresh()
 
641
        self._input_callback_tag = (GLib.io_add_watch
 
642
                                    (sys.stdin.fileno(),
 
643
                                     GLib.IO_IN,
 
644
                                     self.process_input))
 
645
        self.main_loop.run()
 
646
        # Main loop has finished, we should close everything now
 
647
        GLib.source_remove(self._input_callback_tag)
 
648
        self.screen.stop()
 
649
    
 
650
    def stop(self):
 
651
        self.main_loop.quit()
 
652
    
 
653
    def process_input(self, source, condition):
 
654
        keys = self.screen.get_input()
 
655
        translations = { "ctrl n": "down",      # Emacs
 
656
                         "ctrl p": "up",        # Emacs
 
657
                         "ctrl v": "page down", # Emacs
 
658
                         "meta v": "page up",   # Emacs
 
659
                         " ": "page down",      # less
 
660
                         "f": "page down",      # less
 
661
                         "b": "page up",        # less
 
662
                         "j": "down",           # vi
 
663
                         "k": "up",             # vi
 
664
                         }
 
665
        for key in keys:
 
666
            try:
 
667
                key = translations[key]
 
668
            except KeyError:    # :-)
 
669
                pass
 
670
            
 
671
            if key == "q" or key == "Q":
 
672
                self.stop()
 
673
                break
 
674
            elif key == "window resize":
 
675
                self.size = self.screen.get_cols_rows()
 
676
                self.refresh()
 
677
            elif key == "ctrl l":
 
678
                self.screen.clear()
 
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 lines)",
 
697
                                            "v: Toggle verbose log",
 
698
                                            ))))
 
699
                self.log_message_raw(("bold",
 
700
                                      "  "
 
701
                                      .join(("Clients:",
 
702
                                             "+: Enable",
 
703
                                             "-: Disable",
 
704
                                             "R: Remove",
 
705
                                             "s: Start new checker",
 
706
                                             "S: Stop checker",
 
707
                                             "C: Checker OK",
 
708
                                             "a: Approve",
 
709
                                             "d: Deny"))))
 
710
                self.refresh()
 
711
            elif key == "tab":
 
712
                if self.topwidget.get_focus() is self.logbox:
 
713
                    self.topwidget.set_focus(0)
 
714
                else:
 
715
                    self.topwidget.set_focus(self.logbox)
 
716
                self.refresh()
 
717
            elif key == "v":
 
718
                if self.log_level == 0:
 
719
                    self.log_level = 1
 
720
                    self.log_message("Verbose mode: Off")
 
721
                else:
 
722
                    self.log_level = 0
 
723
                    self.log_message("Verbose mode: On")
 
724
            #elif (key == "end" or key == "meta >" or key == "G"
 
725
            #      or key == ">"):
 
726
            #    pass            # xxx end-of-buffer
 
727
            #elif (key == "home" or key == "meta <" or key == "g"
 
728
            #      or key == "<"):
 
729
            #    pass            # xxx beginning-of-buffer
 
730
            #elif key == "ctrl e" or key == "$":
 
731
            #    pass            # xxx move-end-of-line
 
732
            #elif key == "ctrl a" or key == "^":
 
733
            #    pass            # xxx move-beginning-of-line
 
734
            #elif key == "ctrl b" or key == "meta (" or key == "h":
 
735
            #    pass            # xxx left
 
736
            #elif key == "ctrl f" or key == "meta )" or key == "l":
 
737
            #    pass            # xxx right
 
738
            #elif key == "a":
 
739
            #    pass            # scroll up log
 
740
            #elif key == "z":
 
741
            #    pass            # scroll down log
 
742
            elif self.topwidget.selectable():
 
743
                self.topwidget.keypress(self.size, key)
 
744
                self.refresh()
 
745
        return True
 
746
 
 
747
ui = UserInterface()
 
748
try:
 
749
    ui.run()
 
750
except KeyboardInterrupt:
 
751
    ui.screen.stop()
 
752
except Exception as e:
 
753
    ui.log_message(str(e))
 
754
    ui.screen.stop()
 
755
    raise