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  • Committer: Teddy Hogeborn
  • Date: 2019-11-03 18:44:41 UTC
  • Revision ID: teddy@recompile.se-20191103184441-1vhjuf06hjqgfohh
mandos-monitor: Use Python's standard loggging module

* mandos-monitor: Use Python's standard loggging module, also for
                  warnings.  Suppress BytesWarning from urwid when
                  exiting.
  (log): New global logger object.  This replaces UserInterface
        log_message().
  (MandosClientWidget.__init__): Remove "logger" argument.
  (MandosClientWidget.using_timer): Wrap self.update_timer using new
                                    glib_safely() function.
  (glib_safely): New function to log any exceptions instead of letting
                 exceptions propagate up to GLib.
  (UserInterface.__init__): Remove "log_level" argument.  Set new
                            "loghandler" attribute, instance of new
                            "UILogHandler".
  (UserInterface.log_message): Removed.
  (UserInterface.log_message_raw): Renamed to "add_log_line"; all
                                   callers changed.  Also fix
                                   off-by-one error in max_log_length
                                   logic.
  (UserInterface.run): Add self.loghandler to logger "log". Wrap
                       self.process_input using new glib_safely()
                       function.
  (UserInterface.stop): Remove self.loghandler from logger "log".
  (UserInterface.process_input): Make verbosity toggle affect log
                                 level of logger "log".
  (UILogHandler): New.

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mandos-monitor
 
1
#!/usr/bin/python3 -bb
 
2
# -*- mode: python; coding: utf-8 -*-
 
3
#
 
4
# Mandos Monitor - Control and monitor the Mandos server
 
5
#
 
6
# Copyright © 2009-2019 Teddy Hogeborn
 
7
# Copyright © 2009-2019 Björn Påhlsson
 
8
#
 
9
# This file is part of Mandos.
 
10
#
 
11
# Mandos is free software: you can redistribute it and/or modify it
 
12
# under the terms of the GNU General Public License as published by
 
13
# the Free Software Foundation, either version 3 of the License, or
 
14
# (at your option) any later version.
 
15
#
 
16
#     Mandos is distributed in the hope that it will be useful, but
 
17
#     WITHOUT ANY WARRANTY; without even the implied warranty of
 
18
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
19
#     GNU General Public License for more details.
 
20
#
 
21
# You should have received a copy of the GNU General Public License
 
22
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
 
23
#
 
24
# Contact the authors at <mandos@recompile.se>.
 
25
#
 
26
 
 
27
from __future__ import (division, absolute_import, print_function,
 
28
                        unicode_literals)
 
29
try:
 
30
    from future_builtins import *
 
31
except ImportError:
 
32
    pass
 
33
 
 
34
import sys
 
35
import os
 
36
import warnings
 
37
import datetime
 
38
 
 
39
import urwid.curses_display
 
40
import urwid
 
41
 
 
42
from dbus.mainloop.glib import DBusGMainLoop
 
43
from gi.repository import GLib
 
44
 
 
45
import dbus
 
46
 
 
47
import locale
 
48
 
 
49
import logging
 
50
 
 
51
if sys.version_info.major == 2:
 
52
    str = unicode
 
53
 
 
54
log = logging.getLogger(os.path.basename(sys.argv[0]))
 
55
logging.basicConfig(level="NOTSET", # Show all messages
 
56
                    format="%(message)s") # Show basic log messages
 
57
 
 
58
logging.captureWarnings(True)   # Show warnings via the logging system
 
59
 
 
60
locale.setlocale(locale.LC_ALL, '')
 
61
 
 
62
logging.getLogger('dbus.proxies').setLevel(logging.CRITICAL)
 
63
 
 
64
# Some useful constants
 
65
domain = 'se.recompile'
 
66
server_interface = domain + '.Mandos'
 
67
client_interface = domain + '.Mandos.Client'
 
68
version = "1.8.9"
 
69
 
 
70
try:
 
71
    dbus.OBJECT_MANAGER_IFACE
 
72
except AttributeError:
 
73
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
74
 
 
75
 
 
76
def isoformat_to_datetime(iso):
 
77
    "Parse an ISO 8601 date string to a datetime.datetime()"
 
78
    if not iso:
 
79
        return None
 
80
    d, t = iso.split("T", 1)
 
81
    year, month, day = d.split("-", 2)
 
82
    hour, minute, second = t.split(":", 2)
 
83
    second, fraction = divmod(float(second), 1)
 
84
    return datetime.datetime(int(year),
 
85
                             int(month),
 
86
                             int(day),
 
87
                             int(hour),
 
88
                             int(minute),
 
89
                             int(second),            # Whole seconds
 
90
                             int(fraction*1000000))  # Microseconds
 
91
 
 
92
 
 
93
class MandosClientPropertyCache(object):
 
94
    """This wraps a Mandos Client D-Bus proxy object, caches the
 
95
    properties and calls a hook function when any of them are
 
96
    changed.
 
97
    """
 
98
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
99
        self.proxy = proxy_object  # Mandos Client proxy object
 
100
        self.properties = dict() if properties is None else properties
 
101
        self.property_changed_match = (
 
102
            self.proxy.connect_to_signal("PropertiesChanged",
 
103
                                         self.properties_changed,
 
104
                                         dbus.PROPERTIES_IFACE,
 
105
                                         byte_arrays=True))
 
106
 
 
107
        if properties is None:
 
108
            self.properties.update(self.proxy.GetAll(
 
109
                client_interface,
 
110
                dbus_interface=dbus.PROPERTIES_IFACE))
 
111
 
 
112
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
113
 
 
114
    def properties_changed(self, interface, properties, invalidated):
 
115
        """This is called whenever we get a PropertiesChanged signal
 
116
        It updates the changed properties in the "properties" dict.
 
117
        """
 
118
        # Update properties dict with new value
 
119
        if interface == client_interface:
 
120
            self.properties.update(properties)
 
121
 
 
122
    def delete(self):
 
123
        self.property_changed_match.remove()
 
124
 
 
125
 
 
126
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
 
127
    """A Mandos Client which is visible on the screen.
 
128
    """
 
129
 
 
130
    def __init__(self, server_proxy_object=None, update_hook=None,
 
131
                 delete_hook=None, **kwargs):
 
132
        # Called on update
 
133
        self.update_hook = update_hook
 
134
        # Called on delete
 
135
        self.delete_hook = delete_hook
 
136
        # Mandos Server proxy object
 
137
        self.server_proxy_object = server_proxy_object
 
138
 
 
139
        self._update_timer_callback_tag = None
 
140
 
 
141
        # The widget shown normally
 
142
        self._text_widget = urwid.Text("")
 
143
        # The widget shown when we have focus
 
144
        self._focus_text_widget = urwid.Text("")
 
145
        super(MandosClientWidget, self).__init__(**kwargs)
 
146
        self.update()
 
147
        self.opened = False
 
148
 
 
149
        self.match_objects = (
 
150
            self.proxy.connect_to_signal("CheckerCompleted",
 
151
                                         self.checker_completed,
 
152
                                         client_interface,
 
153
                                         byte_arrays=True),
 
154
            self.proxy.connect_to_signal("CheckerStarted",
 
155
                                         self.checker_started,
 
156
                                         client_interface,
 
157
                                         byte_arrays=True),
 
158
            self.proxy.connect_to_signal("GotSecret",
 
159
                                         self.got_secret,
 
160
                                         client_interface,
 
161
                                         byte_arrays=True),
 
162
            self.proxy.connect_to_signal("NeedApproval",
 
163
                                         self.need_approval,
 
164
                                         client_interface,
 
165
                                         byte_arrays=True),
 
166
            self.proxy.connect_to_signal("Rejected",
 
167
                                         self.rejected,
 
168
                                         client_interface,
 
169
                                         byte_arrays=True))
 
170
        log.debug('Created client %s', self.properties["Name"])
 
171
 
 
172
    def using_timer(self, flag):
 
173
        """Call this method with True or False when timer should be
 
174
        activated or deactivated.
 
175
        """
 
176
        if flag and self._update_timer_callback_tag is None:
 
177
            # Will update the shown timer value every second
 
178
            self._update_timer_callback_tag = (
 
179
                GLib.timeout_add(1000,
 
180
                                 glib_safely(self.update_timer)))
 
181
        elif not (flag or self._update_timer_callback_tag is None):
 
182
            GLib.source_remove(self._update_timer_callback_tag)
 
183
            self._update_timer_callback_tag = None
 
184
 
 
185
    def checker_completed(self, exitstatus, condition, command):
 
186
        if exitstatus == 0:
 
187
            log.debug('Checker for client %s (command "%s")'
 
188
                      ' succeeded', self.properties["Name"], command)
 
189
            self.update()
 
190
            return
 
191
        # Checker failed
 
192
        if os.WIFEXITED(condition):
 
193
            log.info('Checker for client %s (command "%s") failed'
 
194
                     ' with exit code %d', self.properties["Name"],
 
195
                     command, os.WEXITSTATUS(condition))
 
196
        elif os.WIFSIGNALED(condition):
 
197
            log.info('Checker for client %s (command "%s") was'
 
198
                     ' killed by signal %d', self.properties["Name"],
 
199
                     command, os.WTERMSIG(condition))
 
200
        self.update()
 
201
 
 
202
    def checker_started(self, command):
 
203
        """Server signals that a checker started."""
 
204
        log.debug('Client %s started checker "%s"',
 
205
                  self.properties["Name"], command)
 
206
 
 
207
    def got_secret(self):
 
208
        log.info("Client %s received its secret",
 
209
                 self.properties["Name"])
 
210
 
 
211
    def need_approval(self, timeout, default):
 
212
        if not default:
 
213
            message = "Client %s needs approval within %f seconds"
 
214
        else:
 
215
            message = "Client %s will get its secret in %f seconds"
 
216
        log.info(message, self.properties["Name"], timeout/1000)
 
217
 
 
218
    def rejected(self, reason):
 
219
        log.info("Client %s was rejected; reason: %s",
 
220
                 self.properties["Name"], reason)
 
221
 
 
222
    def selectable(self):
 
223
        """Make this a "selectable" widget.
 
224
        This overrides the method from urwid.FlowWidget."""
 
225
        return True
 
226
 
 
227
    def rows(self, maxcolrow, focus=False):
 
228
        """How many rows this widget will occupy might depend on
 
229
        whether we have focus or not.
 
230
        This overrides the method from urwid.FlowWidget"""
 
231
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
232
 
 
233
    def current_widget(self, focus=False):
 
234
        if focus or self.opened:
 
235
            return self._focus_widget
 
236
        return self._widget
 
237
 
 
238
    def update(self):
 
239
        "Called when what is visible on the screen should be updated."
 
240
        # How to add standout mode to a style
 
241
        with_standout = {"normal": "standout",
 
242
                         "bold": "bold-standout",
 
243
                         "underline-blink":
 
244
                         "underline-blink-standout",
 
245
                         "bold-underline-blink":
 
246
                         "bold-underline-blink-standout",
 
247
                         }
 
248
 
 
249
        # Rebuild focus and non-focus widgets using current properties
 
250
 
 
251
        # Base part of a client. Name!
 
252
        base = '{name}: '.format(name=self.properties["Name"])
 
253
        if not self.properties["Enabled"]:
 
254
            message = "DISABLED"
 
255
            self.using_timer(False)
 
256
        elif self.properties["ApprovalPending"]:
 
257
            timeout = datetime.timedelta(
 
258
                milliseconds=self.properties["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
def glib_safely(func, retval=True):
 
389
    def safe_func(*args, **kwargs):
 
390
        try:
 
391
            return func(*args, **kwargs)
 
392
        except Exception:
 
393
            log.exception("")
 
394
            return retval
 
395
    return safe_func
 
396
 
 
397
 
 
398
class ConstrainedListBox(urwid.ListBox):
 
399
    """Like a normal urwid.ListBox, but will consume all "up" or
 
400
    "down" key presses, thus not allowing any containing widgets to
 
401
    use them as an excuse to shift focus away from this widget.
 
402
    """
 
403
    def keypress(self, *args, **kwargs):
 
404
        ret = (super(ConstrainedListBox, self)
 
405
               .keypress(*args, **kwargs))
 
406
        if ret in ("up", "down"):
 
407
            return
 
408
        return ret
 
409
 
 
410
 
 
411
class UserInterface(object):
 
412
    """This is the entire user interface - the whole screen
 
413
    with boxes, lists of client widgets, etc.
 
414
    """
 
415
    def __init__(self, max_log_length=1000):
 
416
        DBusGMainLoop(set_as_default=True)
 
417
 
 
418
        self.screen = urwid.curses_display.Screen()
 
419
 
 
420
        self.screen.register_palette((
 
421
                ("normal",
 
422
                 "default", "default", None),
 
423
                ("bold",
 
424
                 "bold", "default", "bold"),
 
425
                ("underline-blink",
 
426
                 "underline,blink", "default", "underline,blink"),
 
427
                ("standout",
 
428
                 "standout", "default", "standout"),
 
429
                ("bold-underline-blink",
 
430
                 "bold,underline,blink", "default",
 
431
                 "bold,underline,blink"),
 
432
                ("bold-standout",
 
433
                 "bold,standout", "default", "bold,standout"),
 
434
                ("underline-blink-standout",
 
435
                 "underline,blink,standout", "default",
 
436
                 "underline,blink,standout"),
 
437
                ("bold-underline-blink-standout",
 
438
                 "bold,underline,blink,standout", "default",
 
439
                 "bold,underline,blink,standout"),
 
440
                ))
 
441
 
 
442
        if urwid.supports_unicode():
 
443
            self.divider = "─"  # \u2500
 
444
        else:
 
445
            self.divider = "_"  # \u005f
 
446
 
 
447
        self.screen.start()
 
448
 
 
449
        self.size = self.screen.get_cols_rows()
 
450
 
 
451
        self.clients = urwid.SimpleListWalker([])
 
452
        self.clients_dict = {}
 
453
 
 
454
        # We will add Text widgets to this list
 
455
        self.log = urwid.SimpleListWalker([])
 
456
        self.max_log_length = max_log_length
 
457
 
 
458
        # We keep a reference to the log widget so we can remove it
 
459
        # from the ListWalker without it getting destroyed
 
460
        self.logbox = ConstrainedListBox(self.log)
 
461
 
 
462
        # This keeps track of whether self.uilist currently has
 
463
        # self.logbox in it or not
 
464
        self.log_visible = True
 
465
        self.log_wrap = "any"
 
466
 
 
467
        self.loghandler = UILogHandler(self)
 
468
 
 
469
        self.rebuild()
 
470
        self.add_log_line(("bold",
 
471
                           "Mandos Monitor version " + version))
 
472
        self.add_log_line(("bold", "q: Quit  ?: Help"))
 
473
 
 
474
        self.busname = domain + '.Mandos'
 
475
        self.main_loop = GLib.MainLoop()
 
476
 
 
477
    def client_not_found(self, key_id, address):
 
478
        log.info("Client with address %s and key ID %s could"
 
479
                 " not be found", address, key_id)
 
480
 
 
481
    def rebuild(self):
 
482
        """This rebuilds the User Interface.
 
483
        Call this when the widget layout needs to change"""
 
484
        self.uilist = []
 
485
        # self.uilist.append(urwid.ListBox(self.clients))
 
486
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
487
                                                          clients),
 
488
                                       # header=urwid.Divider(),
 
489
                                       header=None,
 
490
                                       footer=urwid.Divider(
 
491
                                           div_char=self.divider)))
 
492
        if self.log_visible:
 
493
            self.uilist.append(self.logbox)
 
494
        self.topwidget = urwid.Pile(self.uilist)
 
495
 
 
496
    def add_log_line(self, markup):
 
497
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
498
        if self.max_log_length:
 
499
            if len(self.log) > self.max_log_length:
 
500
                del self.log[0:(len(self.log) - self.max_log_length)]
 
501
        self.logbox.set_focus(len(self.logbox.body.contents)-1,
 
502
                              coming_from="above")
 
503
        self.refresh()
 
504
 
 
505
    def toggle_log_display(self):
 
506
        """Toggle visibility of the log buffer."""
 
507
        self.log_visible = not self.log_visible
 
508
        self.rebuild()
 
509
        log.debug("Log visibility changed to: %s", self.log_visible)
 
510
 
 
511
    def change_log_display(self):
 
512
        """Change type of log display.
 
513
        Currently, this toggles wrapping of text lines."""
 
514
        if self.log_wrap == "clip":
 
515
            self.log_wrap = "any"
 
516
        else:
 
517
            self.log_wrap = "clip"
 
518
        for textwidget in self.log:
 
519
            textwidget.set_wrap_mode(self.log_wrap)
 
520
        log.debug("Wrap mode: %s", self.log_wrap)
 
521
 
 
522
    def find_and_remove_client(self, path, interfaces):
 
523
        """Find a client by its object path and remove it.
 
524
 
 
525
        This is connected to the InterfacesRemoved signal from the
 
526
        Mandos server object."""
 
527
        if client_interface not in interfaces:
 
528
            # Not a Mandos client object; ignore
 
529
            return
 
530
        try:
 
531
            client = self.clients_dict[path]
 
532
        except KeyError:
 
533
            # not found?
 
534
            log.warning("Unknown client %s removed", path)
 
535
            return
 
536
        client.delete()
 
537
 
 
538
    def add_new_client(self, path, ifs_and_props):
 
539
        """Find a client by its object path and remove it.
 
540
 
 
541
        This is connected to the InterfacesAdded signal from the
 
542
        Mandos server object.
 
543
        """
 
544
        if client_interface not in ifs_and_props:
 
545
            # Not a Mandos client object; ignore
 
546
            return
 
547
        client_proxy_object = self.bus.get_object(self.busname, path)
 
548
        self.add_client(MandosClientWidget(
 
549
            server_proxy_object=self.mandos_serv,
 
550
            proxy_object=client_proxy_object,
 
551
            update_hook=self.refresh,
 
552
            delete_hook=self.remove_client,
 
553
            properties=dict(ifs_and_props[client_interface])),
 
554
                        path=path)
 
555
 
 
556
    def add_client(self, client, path=None):
 
557
        self.clients.append(client)
 
558
        if path is None:
 
559
            path = client.proxy.object_path
 
560
        self.clients_dict[path] = client
 
561
        self.clients.sort(key=lambda c: c.properties["Name"])
 
562
        self.refresh()
 
563
 
 
564
    def remove_client(self, client, path=None):
 
565
        self.clients.remove(client)
 
566
        if path is None:
 
567
            path = client.proxy.object_path
 
568
        del self.clients_dict[path]
 
569
        self.refresh()
 
570
 
 
571
    def refresh(self):
 
572
        """Redraw the screen"""
 
573
        canvas = self.topwidget.render(self.size, focus=True)
 
574
        self.screen.draw_screen(self.size, canvas)
 
575
 
 
576
    def run(self):
 
577
        """Start the main loop and exit when it's done."""
 
578
        log.addHandler(self.loghandler)
 
579
        self.orig_log_propagate = log.propagate
 
580
        log.propagate = False
 
581
        self.orig_log_level = log.level
 
582
        log.setLevel("INFO")
 
583
        self.bus = dbus.SystemBus()
 
584
        mandos_dbus_objc = self.bus.get_object(
 
585
            self.busname, "/", follow_name_owner_changes=True)
 
586
        self.mandos_serv = dbus.Interface(
 
587
            mandos_dbus_objc, dbus_interface=server_interface)
 
588
        try:
 
589
            mandos_clients = (self.mandos_serv
 
590
                              .GetAllClientsWithProperties())
 
591
            if not mandos_clients:
 
592
                log.warning("Note: Server has no clients.")
 
593
        except dbus.exceptions.DBusException:
 
594
            log.warning("Note: No Mandos server running.")
 
595
            mandos_clients = dbus.Dictionary()
 
596
 
 
597
        (self.mandos_serv
 
598
         .connect_to_signal("InterfacesRemoved",
 
599
                            self.find_and_remove_client,
 
600
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
601
                            byte_arrays=True))
 
602
        (self.mandos_serv
 
603
         .connect_to_signal("InterfacesAdded",
 
604
                            self.add_new_client,
 
605
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
606
                            byte_arrays=True))
 
607
        (self.mandos_serv
 
608
         .connect_to_signal("ClientNotFound",
 
609
                            self.client_not_found,
 
610
                            dbus_interface=server_interface,
 
611
                            byte_arrays=True))
 
612
        for path, client in mandos_clients.items():
 
613
            client_proxy_object = self.bus.get_object(self.busname,
 
614
                                                      path)
 
615
            self.add_client(MandosClientWidget(
 
616
                server_proxy_object=self.mandos_serv,
 
617
                proxy_object=client_proxy_object,
 
618
                properties=client,
 
619
                update_hook=self.refresh,
 
620
                delete_hook=self.remove_client),
 
621
                            path=path)
 
622
 
 
623
        self.refresh()
 
624
        self._input_callback_tag = (
 
625
            GLib.io_add_watch(
 
626
                GLib.IOChannel.unix_new(sys.stdin.fileno()),
 
627
                GLib.PRIORITY_DEFAULT, GLib.IO_IN,
 
628
                glib_safely(self.process_input)))
 
629
        self.main_loop.run()
 
630
        # Main loop has finished, we should close everything now
 
631
        GLib.source_remove(self._input_callback_tag)
 
632
        with warnings.catch_warnings():
 
633
            warnings.simplefilter("ignore", BytesWarning)
 
634
            self.screen.stop()
 
635
 
 
636
    def stop(self):
 
637
        self.main_loop.quit()
 
638
        log.removeHandler(self.loghandler)
 
639
        log.propagate = self.orig_log_propagate
 
640
 
 
641
    def process_input(self, source, condition):
 
642
        keys = self.screen.get_input()
 
643
        translations = {"ctrl n": "down",       # Emacs
 
644
                        "ctrl p": "up",         # Emacs
 
645
                        "ctrl v": "page down",  # Emacs
 
646
                        "meta v": "page up",    # Emacs
 
647
                        " ": "page down",       # less
 
648
                        "f": "page down",       # less
 
649
                        "b": "page up",         # less
 
650
                        "j": "down",            # vi
 
651
                        "k": "up",              # vi
 
652
                        }
 
653
        for key in keys:
 
654
            try:
 
655
                key = translations[key]
 
656
            except KeyError:    # :-)
 
657
                pass
 
658
 
 
659
            if key == "q" or key == "Q":
 
660
                self.stop()
 
661
                break
 
662
            elif key == "window resize":
 
663
                self.size = self.screen.get_cols_rows()
 
664
                self.refresh()
 
665
            elif key == "ctrl l":
 
666
                self.screen.clear()
 
667
                self.refresh()
 
668
            elif key == "l" or key == "D":
 
669
                self.toggle_log_display()
 
670
                self.refresh()
 
671
            elif key == "w" or key == "i":
 
672
                self.change_log_display()
 
673
                self.refresh()
 
674
            elif key == "?" or key == "f1" or key == "esc":
 
675
                if not self.log_visible:
 
676
                    self.log_visible = True
 
677
                    self.rebuild()
 
678
                self.add_log_line(("bold",
 
679
                                   "  ".join(("q: Quit",
 
680
                                              "?: Help",
 
681
                                              "l: Log window toggle",
 
682
                                              "TAB: Switch window",
 
683
                                              "w: Wrap (log lines)",
 
684
                                              "v: Toggle verbose log",
 
685
                                   ))))
 
686
                self.add_log_line(("bold",
 
687
                                   "  ".join(("Clients:",
 
688
                                              "+: Enable",
 
689
                                              "-: Disable",
 
690
                                              "R: Remove",
 
691
                                              "s: Start new checker",
 
692
                                              "S: Stop checker",
 
693
                                              "C: Checker OK",
 
694
                                              "a: Approve",
 
695
                                              "d: Deny",
 
696
                                   ))))
 
697
                self.refresh()
 
698
            elif key == "tab":
 
699
                if self.topwidget.get_focus() is self.logbox:
 
700
                    self.topwidget.set_focus(0)
 
701
                else:
 
702
                    self.topwidget.set_focus(self.logbox)
 
703
                self.refresh()
 
704
            elif key == "v":
 
705
                if log.level < logging.INFO:
 
706
                    log.setLevel(logging.INFO)
 
707
                    log.info("Verbose mode: Off")
 
708
                else:
 
709
                    log.setLevel(logging.NOTSET)
 
710
                    log.info("Verbose mode: On")
 
711
            # elif (key == "end" or key == "meta >" or key == "G"
 
712
            #       or key == ">"):
 
713
            #     pass            # xxx end-of-buffer
 
714
            # elif (key == "home" or key == "meta <" or key == "g"
 
715
            #       or key == "<"):
 
716
            #     pass            # xxx beginning-of-buffer
 
717
            # elif key == "ctrl e" or key == "$":
 
718
            #     pass            # xxx move-end-of-line
 
719
            # elif key == "ctrl a" or key == "^":
 
720
            #     pass            # xxx move-beginning-of-line
 
721
            # elif key == "ctrl b" or key == "meta (" or key == "h":
 
722
            #     pass            # xxx left
 
723
            # elif key == "ctrl f" or key == "meta )" or key == "l":
 
724
            #     pass            # xxx right
 
725
            # elif key == "a":
 
726
            #     pass            # scroll up log
 
727
            # elif key == "z":
 
728
            #     pass            # scroll down log
 
729
            elif self.topwidget.selectable():
 
730
                self.topwidget.keypress(self.size, key)
 
731
                self.refresh()
 
732
        return True
 
733
 
 
734
 
 
735
class UILogHandler(logging.Handler):
 
736
    def __init__(self, ui, *args, **kwargs):
 
737
        self.ui = ui
 
738
        super(UILogHandler, self).__init__(*args, **kwargs)
 
739
        self.setFormatter(
 
740
            logging.Formatter("%(asctime)s: %(message)s"))
 
741
    def emit(self, record):
 
742
        msg = self.format(record)
 
743
        if record.levelno > logging.INFO:
 
744
            msg = ("bold", msg)
 
745
        self.ui.add_log_line(msg)
 
746
 
 
747
 
 
748
ui = UserInterface()
 
749
try:
 
750
    ui.run()
 
751
except KeyboardInterrupt:
 
752
    with warnings.catch_warnings():
 
753
        warnings.filterwarnings("ignore", "", BytesWarning)
 
754
        ui.screen.stop()
 
755
except Exception:
 
756
    with warnings.catch_warnings():
 
757
        warnings.filterwarnings("ignore", "", BytesWarning)
 
758
        ui.screen.stop()
 
759
    raise