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  • Committer: Teddy Hogeborn
  • Date: 2024-11-22 20:30:34 UTC
  • Revision ID: teddy@recompile.se-20241122203034-92q7483wxv29tqev
mandos-monitor: avoid deprecation warnings from urwid

The urwid.FlowWidget class is deprecated.  Replace it with inheriting
from urwid.Widget, and setting the appropriate class attribute.

* mandos-monitor: Replace any mentions of urwid.FlowWidget with
  urwid.Widget.
  (MandosClientWidget): Inherit from "urwid.Widget" instead of
  "urwid.FlowWidget".  Also, move MandosClientPropertyCache to first
  in inheritance list so that its __init__ method can absorb the
  "proxy_object" and "properties" keyword arguments.
  (MandosClientWidget._sizing): New class attribute; set to
  "frozenset(["flow"])".

(Thanks to an anonymous contributor for reporting this.)

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mandos-monitor
 
1
#!/usr/bin/python3 -bbI
 
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
from __future__ import (division, absolute_import, print_function,
 
27
                        unicode_literals)
 
28
 
 
29
try:
 
30
    from future_builtins import *
 
31
except ImportError:
 
32
    pass
 
33
 
 
34
import sys
 
35
import logging
 
36
import os
 
37
import warnings
 
38
import datetime
 
39
import locale
 
40
 
 
41
import urwid.curses_display
 
42
import urwid
 
43
 
 
44
from dbus.mainloop.glib import DBusGMainLoop
 
45
from gi.repository import GLib
 
46
 
 
47
import dbus
 
48
 
 
49
if sys.version_info.major == 2:
 
50
    __metaclass__ = type
 
51
    str = unicode
 
52
    input = raw_input
 
53
 
 
54
# Show warnings by default
 
55
if not sys.warnoptions:
 
56
    warnings.simplefilter("default")
 
57
 
 
58
log = logging.getLogger(os.path.basename(sys.argv[0]))
 
59
logging.basicConfig(level="NOTSET", # Show all messages
 
60
                    format="%(message)s") # Show basic log messages
 
61
 
 
62
logging.captureWarnings(True)   # Show warnings via the logging system
 
63
 
 
64
locale.setlocale(locale.LC_ALL, "")
 
65
 
 
66
logging.getLogger("dbus.proxies").setLevel(logging.CRITICAL)
 
67
logging.getLogger("urwid").setLevel(logging.INFO)
 
68
 
 
69
# Some useful constants
 
70
domain = "se.recompile"
 
71
server_interface = domain + ".Mandos"
 
72
client_interface = domain + ".Mandos.Client"
 
73
version = "1.8.17"
 
74
 
 
75
try:
 
76
    dbus.OBJECT_MANAGER_IFACE
 
77
except AttributeError:
 
78
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
79
 
 
80
 
 
81
def isoformat_to_datetime(iso):
 
82
    "Parse an ISO 8601 date string to a datetime.datetime()"
 
83
    if not iso:
 
84
        return None
 
85
    d, t = iso.split("T", 1)
 
86
    year, month, day = d.split("-", 2)
 
87
    hour, minute, second = t.split(":", 2)
 
88
    second, fraction = divmod(float(second), 1)
 
89
    return datetime.datetime(int(year),
 
90
                             int(month),
 
91
                             int(day),
 
92
                             int(hour),
 
93
                             int(minute),
 
94
                             int(second),            # Whole seconds
 
95
                             int(fraction*1000000))  # Microseconds
 
96
 
 
97
 
 
98
class MandosClientPropertyCache:
 
99
    """This wraps a Mandos Client D-Bus proxy object, caches the
 
100
    properties and calls a hook function when any of them are
 
101
    changed.
 
102
    """
 
103
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
104
        self.proxy = proxy_object  # Mandos Client proxy object
 
105
        self.properties = dict() if properties is None else properties
 
106
        self.property_changed_match = (
 
107
            self.proxy.connect_to_signal("PropertiesChanged",
 
108
                                         self.properties_changed,
 
109
                                         dbus.PROPERTIES_IFACE,
 
110
                                         byte_arrays=True))
 
111
 
 
112
        if properties is None:
 
113
            self.properties.update(self.proxy.GetAll(
 
114
                client_interface,
 
115
                dbus_interface=dbus.PROPERTIES_IFACE))
 
116
 
 
117
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
118
 
 
119
    def properties_changed(self, interface, properties, invalidated):
 
120
        """This is called whenever we get a PropertiesChanged signal
 
121
        It updates the changed properties in the "properties" dict.
 
122
        """
 
123
        # Update properties dict with new value
 
124
        if interface == client_interface:
 
125
            self.properties.update(properties)
 
126
 
 
127
    def delete(self):
 
128
        self.property_changed_match.remove()
 
129
 
 
130
 
 
131
class MandosClientWidget(MandosClientPropertyCache, urwid.Widget):
 
132
    """A Mandos Client which is visible on the screen.
 
133
    """
 
134
 
 
135
    _sizing = frozenset(["flow"])
 
136
 
 
137
    def __init__(self, server_proxy_object=None, update_hook=None,
 
138
                 delete_hook=None, **kwargs):
 
139
        # Called on update
 
140
        self.update_hook = update_hook
 
141
        # Called on delete
 
142
        self.delete_hook = delete_hook
 
143
        # Mandos Server proxy object
 
144
        self.server_proxy_object = server_proxy_object
 
145
 
 
146
        self._update_timer_callback_tag = None
 
147
 
 
148
        # The widget shown normally
 
149
        self._text_widget = urwid.Text("")
 
150
        # The widget shown when we have focus
 
151
        self._focus_text_widget = urwid.Text("")
 
152
        super(MandosClientWidget, self).__init__(**kwargs)
 
153
        self.update()
 
154
        self.opened = False
 
155
 
 
156
        self.match_objects = (
 
157
            self.proxy.connect_to_signal("CheckerCompleted",
 
158
                                         self.checker_completed,
 
159
                                         client_interface,
 
160
                                         byte_arrays=True),
 
161
            self.proxy.connect_to_signal("CheckerStarted",
 
162
                                         self.checker_started,
 
163
                                         client_interface,
 
164
                                         byte_arrays=True),
 
165
            self.proxy.connect_to_signal("GotSecret",
 
166
                                         self.got_secret,
 
167
                                         client_interface,
 
168
                                         byte_arrays=True),
 
169
            self.proxy.connect_to_signal("NeedApproval",
 
170
                                         self.need_approval,
 
171
                                         client_interface,
 
172
                                         byte_arrays=True),
 
173
            self.proxy.connect_to_signal("Rejected",
 
174
                                         self.rejected,
 
175
                                         client_interface,
 
176
                                         byte_arrays=True))
 
177
        log.debug("Created client %s", self.properties["Name"])
 
178
 
 
179
    def using_timer(self, flag):
 
180
        """Call this method with True or False when timer should be
 
181
        activated or deactivated.
 
182
        """
 
183
        if flag and self._update_timer_callback_tag is None:
 
184
            # Will update the shown timer value every second
 
185
            self._update_timer_callback_tag = (
 
186
                GLib.timeout_add(1000,
 
187
                                 glib_safely(self.update_timer)))
 
188
        elif not (flag or self._update_timer_callback_tag is None):
 
189
            GLib.source_remove(self._update_timer_callback_tag)
 
190
            self._update_timer_callback_tag = None
 
191
 
 
192
    def checker_completed(self, exitstatus, condition, command):
 
193
        if exitstatus == 0:
 
194
            log.debug('Checker for client %s (command "%s")'
 
195
                      " succeeded", self.properties["Name"], command)
 
196
            self.update()
 
197
            return
 
198
        # Checker failed
 
199
        if os.WIFEXITED(condition):
 
200
            log.info('Checker for client %s (command "%s") failed'
 
201
                     " with exit code %d", self.properties["Name"],
 
202
                     command, os.WEXITSTATUS(condition))
 
203
        elif os.WIFSIGNALED(condition):
 
204
            log.info('Checker for client %s (command "%s") was'
 
205
                     " killed by signal %d", self.properties["Name"],
 
206
                     command, os.WTERMSIG(condition))
 
207
        self.update()
 
208
 
 
209
    def checker_started(self, command):
 
210
        """Server signals that a checker started."""
 
211
        log.debug('Client %s started checker "%s"',
 
212
                  self.properties["Name"], command)
 
213
 
 
214
    def got_secret(self):
 
215
        log.info("Client %s received its secret",
 
216
                 self.properties["Name"])
 
217
 
 
218
    def need_approval(self, timeout, default):
 
219
        if not default:
 
220
            message = "Client %s needs approval within %f seconds"
 
221
        else:
 
222
            message = "Client %s will get its secret in %f seconds"
 
223
        log.info(message, self.properties["Name"], timeout/1000)
 
224
 
 
225
    def rejected(self, reason):
 
226
        log.info("Client %s was rejected; reason: %s",
 
227
                 self.properties["Name"], reason)
 
228
 
 
229
    def selectable(self):
 
230
        """Make this a "selectable" widget.
 
231
        This overrides the method from urwid.Widget."""
 
232
        return True
 
233
 
 
234
    def rows(self, maxcolrow, focus=False):
 
235
        """How many rows this widget will occupy might depend on
 
236
        whether we have focus or not.
 
237
        This overrides the method from urwid.Widget"""
 
238
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
239
 
 
240
    def current_widget(self, focus=False):
 
241
        if focus or self.opened:
 
242
            return self._focus_widget
 
243
        return self._widget
 
244
 
 
245
    def update(self):
 
246
        "Called when what is visible on the screen should be updated."
 
247
        # How to add standout mode to a style
 
248
        with_standout = {"normal": "standout",
 
249
                         "bold": "bold-standout",
 
250
                         "underline-blink":
 
251
                         "underline-blink-standout",
 
252
                         "bold-underline-blink":
 
253
                         "bold-underline-blink-standout",
 
254
                         }
 
255
 
 
256
        # Rebuild focus and non-focus widgets using current properties
 
257
 
 
258
        # Base part of a client. Name!
 
259
        base = "{name}: ".format(name=self.properties["Name"])
 
260
        if not self.properties["Enabled"]:
 
261
            message = "DISABLED"
 
262
            self.using_timer(False)
 
263
        elif self.properties["ApprovalPending"]:
 
264
            timeout = datetime.timedelta(
 
265
                milliseconds=self.properties["ApprovalDelay"])
 
266
            last_approval_request = isoformat_to_datetime(
 
267
                self.properties["LastApprovalRequest"])
 
268
            if last_approval_request is not None:
 
269
                timer = max(timeout - (datetime.datetime.utcnow()
 
270
                                       - last_approval_request),
 
271
                            datetime.timedelta())
 
272
            else:
 
273
                timer = datetime.timedelta()
 
274
            if self.properties["ApprovedByDefault"]:
 
275
                message = "Approval in {}. (d)eny?"
 
276
            else:
 
277
                message = "Denial in {}. (a)pprove?"
 
278
            message = message.format(str(timer).rsplit(".", 1)[0])
 
279
            self.using_timer(True)
 
280
        elif self.properties["LastCheckerStatus"] != 0:
 
281
            # When checker has failed, show timer until client expires
 
282
            expires = self.properties["Expires"]
 
283
            if expires == "":
 
284
                timer = datetime.timedelta(0)
 
285
            else:
 
286
                expires = (datetime.datetime.strptime
 
287
                           (expires, "%Y-%m-%dT%H:%M:%S.%f"))
 
288
                timer = max(expires - datetime.datetime.utcnow(),
 
289
                            datetime.timedelta())
 
290
            message = ("A checker has failed! Time until client"
 
291
                       " gets disabled: {}"
 
292
                       .format(str(timer).rsplit(".", 1)[0]))
 
293
            self.using_timer(True)
 
294
        else:
 
295
            message = "enabled"
 
296
            self.using_timer(False)
 
297
        self._text = "{}{}".format(base, message)
 
298
 
 
299
        if not urwid.supports_unicode():
 
300
            self._text = self._text.encode("ascii", "replace")
 
301
        textlist = [("normal", self._text)]
 
302
        self._text_widget.set_text(textlist)
 
303
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
304
                                           text[1])
 
305
                                          if isinstance(text, tuple)
 
306
                                          else text
 
307
                                          for text in textlist])
 
308
        self._widget = self._text_widget
 
309
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
310
                                            "standout")
 
311
        # Run update hook, if any
 
312
        if self.update_hook is not None:
 
313
            self.update_hook()
 
314
 
 
315
    def update_timer(self):
 
316
        """called by GLib. Will indefinitely loop until
 
317
        GLib.source_remove() on tag is called
 
318
        """
 
319
        self.update()
 
320
        return True             # Keep calling this
 
321
 
 
322
    def delete(self, **kwargs):
 
323
        if self._update_timer_callback_tag is not None:
 
324
            GLib.source_remove(self._update_timer_callback_tag)
 
325
            self._update_timer_callback_tag = None
 
326
        for match in self.match_objects:
 
327
            match.remove()
 
328
        self.match_objects = ()
 
329
        if self.delete_hook is not None:
 
330
            self.delete_hook(self)
 
331
        return super(MandosClientWidget, self).delete(**kwargs)
 
332
 
 
333
    def render(self, maxcolrow, focus=False):
 
334
        """Render differently if we have focus.
 
335
        This overrides the method from urwid.Widget"""
 
336
        return self.current_widget(focus).render(maxcolrow,
 
337
                                                 focus=focus)
 
338
 
 
339
    def keypress(self, maxcolrow, key):
 
340
        """Handle keys.
 
341
        This overrides the method from urwid.Widget"""
 
342
        if key == "+":
 
343
            self.proxy.Set(client_interface, "Enabled",
 
344
                           dbus.Boolean(True), ignore_reply=True,
 
345
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
346
        elif key == "-":
 
347
            self.proxy.Set(client_interface, "Enabled", False,
 
348
                           ignore_reply=True,
 
349
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
350
        elif key == "a":
 
351
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
352
                               dbus_interface=client_interface,
 
353
                               ignore_reply=True)
 
354
        elif key == "d":
 
355
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
356
                               dbus_interface=client_interface,
 
357
                               ignore_reply=True)
 
358
        elif key == "R" or key == "_" or key == "ctrl k":
 
359
            self.server_proxy_object.RemoveClient(self.proxy
 
360
                                                  .object_path,
 
361
                                                  ignore_reply=True)
 
362
        elif key == "s":
 
363
            self.proxy.Set(client_interface, "CheckerRunning",
 
364
                           dbus.Boolean(True), ignore_reply=True,
 
365
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
366
        elif key == "S":
 
367
            self.proxy.Set(client_interface, "CheckerRunning",
 
368
                           dbus.Boolean(False), ignore_reply=True,
 
369
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
370
        elif key == "C":
 
371
            self.proxy.CheckedOK(dbus_interface=client_interface,
 
372
                                 ignore_reply=True)
 
373
        # xxx
 
374
#         elif key == "p" or key == "=":
 
375
#             self.proxy.pause()
 
376
#         elif key == "u" or key == ":":
 
377
#             self.proxy.unpause()
 
378
#         elif key == "RET":
 
379
#             self.open()
 
380
        else:
 
381
            return key
 
382
 
 
383
    def properties_changed(self, interface, properties, invalidated):
 
384
        """Call self.update() if any properties changed.
 
385
        This overrides the method from MandosClientPropertyCache"""
 
386
        old_values = {key: self.properties.get(key)
 
387
                      for key in properties.keys()}
 
388
        super(MandosClientWidget, self).properties_changed(
 
389
            interface, properties, invalidated)
 
390
        if any(old_values[key] != self.properties.get(key)
 
391
               for key in old_values):
 
392
            self.update()
 
393
 
 
394
 
 
395
def glib_safely(func, retval=True):
 
396
    def safe_func(*args, **kwargs):
 
397
        try:
 
398
            return func(*args, **kwargs)
 
399
        except Exception:
 
400
            log.exception("")
 
401
            return retval
 
402
    return safe_func
 
403
 
 
404
 
 
405
class ConstrainedListBox(urwid.ListBox):
 
406
    """Like a normal urwid.ListBox, but will consume all "up" or
 
407
    "down" key presses, thus not allowing any containing widgets to
 
408
    use them as an excuse to shift focus away from this widget.
 
409
    """
 
410
    def keypress(self, *args, **kwargs):
 
411
        ret = (super(ConstrainedListBox, self)
 
412
               .keypress(*args, **kwargs))
 
413
        if ret in ("up", "down"):
 
414
            return
 
415
        return ret
 
416
 
 
417
 
 
418
class UserInterface:
 
419
    """This is the entire user interface - the whole screen
 
420
    with boxes, lists of client widgets, etc.
 
421
    """
 
422
    def __init__(self, max_log_length=1000):
 
423
        DBusGMainLoop(set_as_default=True)
 
424
 
 
425
        self.screen = urwid.curses_display.Screen()
 
426
 
 
427
        self.screen.register_palette((
 
428
                ("normal",
 
429
                 "default", "default", None),
 
430
                ("bold",
 
431
                 "bold", "default", "bold"),
 
432
                ("underline-blink",
 
433
                 "underline,blink", "default", "underline,blink"),
 
434
                ("standout",
 
435
                 "standout", "default", "standout"),
 
436
                ("bold-underline-blink",
 
437
                 "bold,underline,blink", "default",
 
438
                 "bold,underline,blink"),
 
439
                ("bold-standout",
 
440
                 "bold,standout", "default", "bold,standout"),
 
441
                ("underline-blink-standout",
 
442
                 "underline,blink,standout", "default",
 
443
                 "underline,blink,standout"),
 
444
                ("bold-underline-blink-standout",
 
445
                 "bold,underline,blink,standout", "default",
 
446
                 "bold,underline,blink,standout"),
 
447
                ))
 
448
 
 
449
        if urwid.supports_unicode():
 
450
            self.divider = "─"  # \u2500
 
451
        else:
 
452
            self.divider = "_"  # \u005f
 
453
 
 
454
        self.screen.start()
 
455
 
 
456
        self.size = self.screen.get_cols_rows()
 
457
 
 
458
        self.clients = urwid.SimpleListWalker([])
 
459
        self.clients_dict = {}
 
460
 
 
461
        # We will add Text widgets to this list
 
462
        self.log = urwid.SimpleListWalker([])
 
463
        self.max_log_length = max_log_length
 
464
 
 
465
        # We keep a reference to the log widget so we can remove it
 
466
        # from the ListWalker without it getting destroyed
 
467
        self.logbox = ConstrainedListBox(self.log)
 
468
 
 
469
        # This keeps track of whether self.uilist currently has
 
470
        # self.logbox in it or not
 
471
        self.log_visible = True
 
472
        self.log_wrap = "any"
 
473
 
 
474
        self.loghandler = UILogHandler(self)
 
475
 
 
476
        self.rebuild()
 
477
        self.add_log_line(("bold",
 
478
                           "Mandos Monitor version " + version))
 
479
        self.add_log_line(("bold", "q: Quit  ?: Help"))
 
480
 
 
481
        self.busname = domain + ".Mandos"
 
482
        self.main_loop = GLib.MainLoop()
 
483
 
 
484
    def client_not_found(self, key_id, address):
 
485
        log.info("Client with address %s and key ID %s could"
 
486
                 " not be found", address, key_id)
 
487
 
 
488
    def rebuild(self):
 
489
        """This rebuilds the User Interface.
 
490
        Call this when the widget layout needs to change"""
 
491
        self.uilist = []
 
492
        # self.uilist.append(urwid.ListBox(self.clients))
 
493
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
494
                                                          clients),
 
495
                                       # header=urwid.Divider(),
 
496
                                       header=None,
 
497
                                       footer=urwid.Divider(
 
498
                                           div_char=self.divider)))
 
499
        if self.log_visible:
 
500
            self.uilist.append(self.logbox)
 
501
        self.topwidget = urwid.Pile(self.uilist)
 
502
 
 
503
    def add_log_line(self, markup):
 
504
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
505
        if self.max_log_length:
 
506
            if len(self.log) > self.max_log_length:
 
507
                del self.log[0:(len(self.log) - self.max_log_length)]
 
508
        self.logbox.set_focus(len(self.logbox.body.contents)-1,
 
509
                              coming_from="above")
 
510
        self.refresh()
 
511
 
 
512
    def toggle_log_display(self):
 
513
        """Toggle visibility of the log buffer."""
 
514
        self.log_visible = not self.log_visible
 
515
        self.rebuild()
 
516
        log.debug("Log visibility changed to: %s", self.log_visible)
 
517
 
 
518
    def change_log_display(self):
 
519
        """Change type of log display.
 
520
        Currently, this toggles wrapping of text lines."""
 
521
        if self.log_wrap == "clip":
 
522
            self.log_wrap = "any"
 
523
        else:
 
524
            self.log_wrap = "clip"
 
525
        for textwidget in self.log:
 
526
            textwidget.set_wrap_mode(self.log_wrap)
 
527
        log.debug("Wrap mode: %s", self.log_wrap)
 
528
 
 
529
    def find_and_remove_client(self, path, interfaces):
 
530
        """Find a client by its object path and remove it.
 
531
 
 
532
        This is connected to the InterfacesRemoved signal from the
 
533
        Mandos server object."""
 
534
        if client_interface not in interfaces:
 
535
            # Not a Mandos client object; ignore
 
536
            return
 
537
        try:
 
538
            client = self.clients_dict[path]
 
539
        except KeyError:
 
540
            # not found?
 
541
            log.warning("Unknown client %s removed", 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(
 
556
            server_proxy_object=self.mandos_serv,
 
557
            proxy_object=client_proxy_object,
 
558
            update_hook=self.refresh,
 
559
            delete_hook=self.remove_client,
 
560
            properties=dict(ifs_and_props[client_interface])),
 
561
                        path=path)
 
562
 
 
563
    def add_client(self, client, path=None):
 
564
        self.clients.append(client)
 
565
        if path is None:
 
566
            path = client.proxy.object_path
 
567
        self.clients_dict[path] = client
 
568
        self.clients.sort(key=lambda c: c.properties["Name"])
 
569
        self.refresh()
 
570
 
 
571
    def remove_client(self, client, path=None):
 
572
        self.clients.remove(client)
 
573
        if path is None:
 
574
            path = client.proxy.object_path
 
575
        del self.clients_dict[path]
 
576
        self.refresh()
 
577
 
 
578
    def refresh(self):
 
579
        """Redraw the screen"""
 
580
        canvas = self.topwidget.render(self.size, focus=True)
 
581
        self.screen.draw_screen(self.size, canvas)
 
582
 
 
583
    def run(self):
 
584
        """Start the main loop and exit when it's done."""
 
585
        log.addHandler(self.loghandler)
 
586
        self.orig_log_propagate = log.propagate
 
587
        log.propagate = False
 
588
        self.orig_log_level = log.level
 
589
        log.setLevel("INFO")
 
590
        self.bus = dbus.SystemBus()
 
591
        mandos_dbus_objc = self.bus.get_object(
 
592
            self.busname, "/", follow_name_owner_changes=True)
 
593
        self.mandos_serv = dbus.Interface(
 
594
            mandos_dbus_objc, dbus_interface=server_interface)
 
595
        try:
 
596
            mandos_clients = (self.mandos_serv
 
597
                              .GetAllClientsWithProperties())
 
598
            if not mandos_clients:
 
599
                log.warning("Note: Server has no clients.")
 
600
        except dbus.exceptions.DBusException:
 
601
            log.warning("Note: No Mandos server running.")
 
602
            mandos_clients = dbus.Dictionary()
 
603
 
 
604
        (self.mandos_serv
 
605
         .connect_to_signal("InterfacesRemoved",
 
606
                            self.find_and_remove_client,
 
607
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
608
                            byte_arrays=True))
 
609
        (self.mandos_serv
 
610
         .connect_to_signal("InterfacesAdded",
 
611
                            self.add_new_client,
 
612
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
613
                            byte_arrays=True))
 
614
        (self.mandos_serv
 
615
         .connect_to_signal("ClientNotFound",
 
616
                            self.client_not_found,
 
617
                            dbus_interface=server_interface,
 
618
                            byte_arrays=True))
 
619
        for path, client in mandos_clients.items():
 
620
            client_proxy_object = self.bus.get_object(self.busname,
 
621
                                                      path)
 
622
            self.add_client(MandosClientWidget(
 
623
                server_proxy_object=self.mandos_serv,
 
624
                proxy_object=client_proxy_object,
 
625
                properties=client,
 
626
                update_hook=self.refresh,
 
627
                delete_hook=self.remove_client),
 
628
                            path=path)
 
629
 
 
630
        self.refresh()
 
631
        self._input_callback_tag = (
 
632
            GLib.io_add_watch(
 
633
                GLib.IOChannel.unix_new(sys.stdin.fileno()),
 
634
                GLib.PRIORITY_DEFAULT, GLib.IO_IN,
 
635
                glib_safely(self.process_input)))
 
636
        self.main_loop.run()
 
637
        # Main loop has finished, we should close everything now
 
638
        GLib.source_remove(self._input_callback_tag)
 
639
        with warnings.catch_warnings():
 
640
            warnings.simplefilter("ignore", BytesWarning)
 
641
            self.screen.stop()
 
642
 
 
643
    def stop(self):
 
644
        self.main_loop.quit()
 
645
        log.removeHandler(self.loghandler)
 
646
        log.propagate = self.orig_log_propagate
 
647
 
 
648
    def process_input(self, source, condition):
 
649
        keys = self.screen.get_input()
 
650
        translations = {"ctrl n": "down",       # Emacs
 
651
                        "ctrl p": "up",         # Emacs
 
652
                        "ctrl v": "page down",  # Emacs
 
653
                        "meta v": "page up",    # Emacs
 
654
                        " ": "page down",       # less
 
655
                        "f": "page down",       # less
 
656
                        "b": "page up",         # less
 
657
                        "j": "down",            # vi
 
658
                        "k": "up",              # vi
 
659
                        }
 
660
        for key in keys:
 
661
            try:
 
662
                key = translations[key]
 
663
            except KeyError:    # :-)
 
664
                pass
 
665
 
 
666
            if key == "q" or key == "Q":
 
667
                self.stop()
 
668
                break
 
669
            elif key == "window resize":
 
670
                self.size = self.screen.get_cols_rows()
 
671
                self.refresh()
 
672
            elif key == "ctrl l":
 
673
                self.screen.clear()
 
674
                self.refresh()
 
675
            elif key == "l" or key == "D":
 
676
                self.toggle_log_display()
 
677
                self.refresh()
 
678
            elif key == "w" or key == "i":
 
679
                self.change_log_display()
 
680
                self.refresh()
 
681
            elif key == "?" or key == "f1" or key == "esc":
 
682
                if not self.log_visible:
 
683
                    self.log_visible = True
 
684
                    self.rebuild()
 
685
                self.add_log_line(("bold",
 
686
                                   "  ".join(("q: Quit",
 
687
                                              "?: Help",
 
688
                                              "l: Log window toggle",
 
689
                                              "TAB: Switch window",
 
690
                                              "w: Wrap (log lines)",
 
691
                                              "v: Toggle verbose log",
 
692
                                   ))))
 
693
                self.add_log_line(("bold",
 
694
                                   "  ".join(("Clients:",
 
695
                                              "+: Enable",
 
696
                                              "-: Disable",
 
697
                                              "R: Remove",
 
698
                                              "s: Start new checker",
 
699
                                              "S: Stop checker",
 
700
                                              "C: Checker OK",
 
701
                                              "a: Approve",
 
702
                                              "d: Deny",
 
703
                                   ))))
 
704
                self.refresh()
 
705
            elif key == "tab":
 
706
                if self.topwidget.get_focus() is self.logbox:
 
707
                    self.topwidget.set_focus(0)
 
708
                else:
 
709
                    self.topwidget.set_focus(self.logbox)
 
710
                self.refresh()
 
711
            elif key == "v":
 
712
                if log.level < logging.INFO:
 
713
                    log.setLevel(logging.INFO)
 
714
                    log.info("Verbose mode: Off")
 
715
                else:
 
716
                    log.setLevel(logging.NOTSET)
 
717
                    log.info("Verbose mode: On")
 
718
            # elif (key == "end" or key == "meta >" or key == "G"
 
719
            #       or key == ">"):
 
720
            #     pass            # xxx end-of-buffer
 
721
            # elif (key == "home" or key == "meta <" or key == "g"
 
722
            #       or key == "<"):
 
723
            #     pass            # xxx beginning-of-buffer
 
724
            # elif key == "ctrl e" or key == "$":
 
725
            #     pass            # xxx move-end-of-line
 
726
            # elif key == "ctrl a" or key == "^":
 
727
            #     pass            # xxx move-beginning-of-line
 
728
            # elif key == "ctrl b" or key == "meta (" or key == "h":
 
729
            #     pass            # xxx left
 
730
            # elif key == "ctrl f" or key == "meta )" or key == "l":
 
731
            #     pass            # xxx right
 
732
            # elif key == "a":
 
733
            #     pass            # scroll up log
 
734
            # elif key == "z":
 
735
            #     pass            # scroll down log
 
736
            elif self.topwidget.selectable():
 
737
                self.topwidget.keypress(self.size, key)
 
738
                self.refresh()
 
739
        return True
 
740
 
 
741
 
 
742
class UILogHandler(logging.Handler):
 
743
    def __init__(self, ui, *args, **kwargs):
 
744
        self.ui = ui
 
745
        super(UILogHandler, self).__init__(*args, **kwargs)
 
746
        self.setFormatter(
 
747
            logging.Formatter("%(asctime)s: %(message)s"))
 
748
    def emit(self, record):
 
749
        msg = self.format(record)
 
750
        if record.levelno > logging.INFO:
 
751
            msg = ("bold", msg)
 
752
        self.ui.add_log_line(msg)
 
753
 
 
754
 
 
755
ui = UserInterface()
 
756
try:
 
757
    ui.run()
 
758
except KeyboardInterrupt:
 
759
    with warnings.catch_warnings():
 
760
        warnings.filterwarnings("ignore", "", BytesWarning)
 
761
        ui.screen.stop()
 
762
except Exception:
 
763
    with warnings.catch_warnings():
 
764
        warnings.filterwarnings("ignore", "", BytesWarning)
 
765
        ui.screen.stop()
 
766
    raise