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  • Committer: Teddy Hogeborn
  • Date: 2024-11-17 18:43:11 UTC
  • mto: This revision was merged to the branch mainline in revision 412.
  • Revision ID: teddy@recompile.se-20241117184311-ox25kvngy62h209g
Debian package: Avoid suggesting a C compiler unnecessarily

The list of suggested packages, meant to enable the "mandos" program
to find the correct value of SO_BINDTODEVICE by using a C compiler,
are not necessary when Python 3.3 or later is used, since it has the
SO_BINDTODEVICE constant defined in the "socket" module.  Also, Python
2.6 or older has the same constant in the old "IN" module.  Therefore,
we should suggest these Python versions as alternatives to a C
compiler, so that a C compiler is not installed unnecessarily.

debian/control (Package: mandos/Suggests): Add "python3 (>= 3.3)" and
"python (<= 2.6)" as alternatives to "libc6-dev | libc-dev" and
"c-compiler".

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Lines of Context:
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
 
 
68
# Some useful constants
 
69
domain = "se.recompile"
 
70
server_interface = domain + ".Mandos"
 
71
client_interface = domain + ".Mandos.Client"
 
72
version = "1.8.17"
 
73
 
 
74
try:
 
75
    dbus.OBJECT_MANAGER_IFACE
 
76
except AttributeError:
 
77
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
78
 
 
79
 
 
80
def isoformat_to_datetime(iso):
 
81
    "Parse an ISO 8601 date string to a datetime.datetime()"
 
82
    if not iso:
 
83
        return None
 
84
    d, t = iso.split("T", 1)
 
85
    year, month, day = d.split("-", 2)
 
86
    hour, minute, second = t.split(":", 2)
 
87
    second, fraction = divmod(float(second), 1)
 
88
    return datetime.datetime(int(year),
 
89
                             int(month),
 
90
                             int(day),
 
91
                             int(hour),
 
92
                             int(minute),
 
93
                             int(second),            # Whole seconds
 
94
                             int(fraction*1000000))  # Microseconds
 
95
 
 
96
 
 
97
class MandosClientPropertyCache:
 
98
    """This wraps a Mandos Client D-Bus proxy object, caches the
 
99
    properties and calls a hook function when any of them are
 
100
    changed.
 
101
    """
 
102
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
103
        self.proxy = proxy_object  # Mandos Client proxy object
 
104
        self.properties = dict() if properties is None else properties
 
105
        self.property_changed_match = (
 
106
            self.proxy.connect_to_signal("PropertiesChanged",
 
107
                                         self.properties_changed,
 
108
                                         dbus.PROPERTIES_IFACE,
 
109
                                         byte_arrays=True))
 
110
 
 
111
        if properties is None:
 
112
            self.properties.update(self.proxy.GetAll(
 
113
                client_interface,
 
114
                dbus_interface=dbus.PROPERTIES_IFACE))
 
115
 
 
116
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
117
 
 
118
    def properties_changed(self, interface, properties, invalidated):
 
119
        """This is called whenever we get a PropertiesChanged signal
 
120
        It updates the changed properties in the "properties" dict.
 
121
        """
 
122
        # Update properties dict with new value
 
123
        if interface == client_interface:
 
124
            self.properties.update(properties)
 
125
 
 
126
    def delete(self):
 
127
        self.property_changed_match.remove()
 
128
 
 
129
 
 
130
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
 
131
    """A Mandos Client which is visible on the screen.
 
132
    """
 
133
 
 
134
    def __init__(self, server_proxy_object=None, update_hook=None,
 
135
                 delete_hook=None, **kwargs):
 
136
        # Called on update
 
137
        self.update_hook = update_hook
 
138
        # Called on delete
 
139
        self.delete_hook = delete_hook
 
140
        # Mandos Server proxy object
 
141
        self.server_proxy_object = server_proxy_object
 
142
 
 
143
        self._update_timer_callback_tag = None
 
144
 
 
145
        # The widget shown normally
 
146
        self._text_widget = urwid.Text("")
 
147
        # The widget shown when we have focus
 
148
        self._focus_text_widget = urwid.Text("")
 
149
        super(MandosClientWidget, self).__init__(**kwargs)
 
150
        self.update()
 
151
        self.opened = False
 
152
 
 
153
        self.match_objects = (
 
154
            self.proxy.connect_to_signal("CheckerCompleted",
 
155
                                         self.checker_completed,
 
156
                                         client_interface,
 
157
                                         byte_arrays=True),
 
158
            self.proxy.connect_to_signal("CheckerStarted",
 
159
                                         self.checker_started,
 
160
                                         client_interface,
 
161
                                         byte_arrays=True),
 
162
            self.proxy.connect_to_signal("GotSecret",
 
163
                                         self.got_secret,
 
164
                                         client_interface,
 
165
                                         byte_arrays=True),
 
166
            self.proxy.connect_to_signal("NeedApproval",
 
167
                                         self.need_approval,
 
168
                                         client_interface,
 
169
                                         byte_arrays=True),
 
170
            self.proxy.connect_to_signal("Rejected",
 
171
                                         self.rejected,
 
172
                                         client_interface,
 
173
                                         byte_arrays=True))
 
174
        log.debug("Created client %s", self.properties["Name"])
 
175
 
 
176
    def using_timer(self, flag):
 
177
        """Call this method with True or False when timer should be
 
178
        activated or deactivated.
 
179
        """
 
180
        if flag and self._update_timer_callback_tag is None:
 
181
            # Will update the shown timer value every second
 
182
            self._update_timer_callback_tag = (
 
183
                GLib.timeout_add(1000,
 
184
                                 glib_safely(self.update_timer)))
 
185
        elif not (flag or self._update_timer_callback_tag is None):
 
186
            GLib.source_remove(self._update_timer_callback_tag)
 
187
            self._update_timer_callback_tag = None
 
188
 
 
189
    def checker_completed(self, exitstatus, condition, command):
 
190
        if exitstatus == 0:
 
191
            log.debug('Checker for client %s (command "%s")'
 
192
                      " succeeded", self.properties["Name"], command)
 
193
            self.update()
 
194
            return
 
195
        # Checker failed
 
196
        if os.WIFEXITED(condition):
 
197
            log.info('Checker for client %s (command "%s") failed'
 
198
                     " with exit code %d", self.properties["Name"],
 
199
                     command, os.WEXITSTATUS(condition))
 
200
        elif os.WIFSIGNALED(condition):
 
201
            log.info('Checker for client %s (command "%s") was'
 
202
                     " killed by signal %d", self.properties["Name"],
 
203
                     command, os.WTERMSIG(condition))
 
204
        self.update()
 
205
 
 
206
    def checker_started(self, command):
 
207
        """Server signals that a checker started."""
 
208
        log.debug('Client %s started checker "%s"',
 
209
                  self.properties["Name"], command)
 
210
 
 
211
    def got_secret(self):
 
212
        log.info("Client %s received its secret",
 
213
                 self.properties["Name"])
 
214
 
 
215
    def need_approval(self, timeout, default):
 
216
        if not default:
 
217
            message = "Client %s needs approval within %f seconds"
 
218
        else:
 
219
            message = "Client %s will get its secret in %f seconds"
 
220
        log.info(message, self.properties["Name"], timeout/1000)
 
221
 
 
222
    def rejected(self, reason):
 
223
        log.info("Client %s was rejected; reason: %s",
 
224
                 self.properties["Name"], reason)
 
225
 
 
226
    def selectable(self):
 
227
        """Make this a "selectable" widget.
 
228
        This overrides the method from urwid.FlowWidget."""
 
229
        return True
 
230
 
 
231
    def rows(self, maxcolrow, focus=False):
 
232
        """How many rows this widget will occupy might depend on
 
233
        whether we have focus or not.
 
234
        This overrides the method from urwid.FlowWidget"""
 
235
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
236
 
 
237
    def current_widget(self, focus=False):
 
238
        if focus or self.opened:
 
239
            return self._focus_widget
 
240
        return self._widget
 
241
 
 
242
    def update(self):
 
243
        "Called when what is visible on the screen should be updated."
 
244
        # How to add standout mode to a style
 
245
        with_standout = {"normal": "standout",
 
246
                         "bold": "bold-standout",
 
247
                         "underline-blink":
 
248
                         "underline-blink-standout",
 
249
                         "bold-underline-blink":
 
250
                         "bold-underline-blink-standout",
 
251
                         }
 
252
 
 
253
        # Rebuild focus and non-focus widgets using current properties
 
254
 
 
255
        # Base part of a client. Name!
 
256
        base = "{name}: ".format(name=self.properties["Name"])
 
257
        if not self.properties["Enabled"]:
 
258
            message = "DISABLED"
 
259
            self.using_timer(False)
 
260
        elif self.properties["ApprovalPending"]:
 
261
            timeout = datetime.timedelta(
 
262
                milliseconds=self.properties["ApprovalDelay"])
 
263
            last_approval_request = isoformat_to_datetime(
 
264
                self.properties["LastApprovalRequest"])
 
265
            if last_approval_request is not None:
 
266
                timer = max(timeout - (datetime.datetime.utcnow()
 
267
                                       - last_approval_request),
 
268
                            datetime.timedelta())
 
269
            else:
 
270
                timer = datetime.timedelta()
 
271
            if self.properties["ApprovedByDefault"]:
 
272
                message = "Approval in {}. (d)eny?"
 
273
            else:
 
274
                message = "Denial in {}. (a)pprove?"
 
275
            message = message.format(str(timer).rsplit(".", 1)[0])
 
276
            self.using_timer(True)
 
277
        elif self.properties["LastCheckerStatus"] != 0:
 
278
            # When checker has failed, show timer until client expires
 
279
            expires = self.properties["Expires"]
 
280
            if expires == "":
 
281
                timer = datetime.timedelta(0)
 
282
            else:
 
283
                expires = (datetime.datetime.strptime
 
284
                           (expires, "%Y-%m-%dT%H:%M:%S.%f"))
 
285
                timer = max(expires - datetime.datetime.utcnow(),
 
286
                            datetime.timedelta())
 
287
            message = ("A checker has failed! Time until client"
 
288
                       " gets disabled: {}"
 
289
                       .format(str(timer).rsplit(".", 1)[0]))
 
290
            self.using_timer(True)
 
291
        else:
 
292
            message = "enabled"
 
293
            self.using_timer(False)
 
294
        self._text = "{}{}".format(base, message)
 
295
 
 
296
        if not urwid.supports_unicode():
 
297
            self._text = self._text.encode("ascii", "replace")
 
298
        textlist = [("normal", self._text)]
 
299
        self._text_widget.set_text(textlist)
 
300
        self._focus_text_widget.set_text([(with_standout[text[0]],
 
301
                                           text[1])
 
302
                                          if isinstance(text, tuple)
 
303
                                          else text
 
304
                                          for text in textlist])
 
305
        self._widget = self._text_widget
 
306
        self._focus_widget = urwid.AttrWrap(self._focus_text_widget,
 
307
                                            "standout")
 
308
        # Run update hook, if any
 
309
        if self.update_hook is not None:
 
310
            self.update_hook()
 
311
 
 
312
    def update_timer(self):
 
313
        """called by GLib. Will indefinitely loop until
 
314
        GLib.source_remove() on tag is called
 
315
        """
 
316
        self.update()
 
317
        return True             # Keep calling this
 
318
 
 
319
    def delete(self, **kwargs):
 
320
        if self._update_timer_callback_tag is not None:
 
321
            GLib.source_remove(self._update_timer_callback_tag)
 
322
            self._update_timer_callback_tag = None
 
323
        for match in self.match_objects:
 
324
            match.remove()
 
325
        self.match_objects = ()
 
326
        if self.delete_hook is not None:
 
327
            self.delete_hook(self)
 
328
        return super(MandosClientWidget, self).delete(**kwargs)
 
329
 
 
330
    def render(self, maxcolrow, focus=False):
 
331
        """Render differently if we have focus.
 
332
        This overrides the method from urwid.FlowWidget"""
 
333
        return self.current_widget(focus).render(maxcolrow,
 
334
                                                 focus=focus)
 
335
 
 
336
    def keypress(self, maxcolrow, key):
 
337
        """Handle keys.
 
338
        This overrides the method from urwid.FlowWidget"""
 
339
        if key == "+":
 
340
            self.proxy.Set(client_interface, "Enabled",
 
341
                           dbus.Boolean(True), ignore_reply=True,
 
342
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
343
        elif key == "-":
 
344
            self.proxy.Set(client_interface, "Enabled", False,
 
345
                           ignore_reply=True,
 
346
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
347
        elif key == "a":
 
348
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
349
                               dbus_interface=client_interface,
 
350
                               ignore_reply=True)
 
351
        elif key == "d":
 
352
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
353
                               dbus_interface=client_interface,
 
354
                               ignore_reply=True)
 
355
        elif key == "R" or key == "_" or key == "ctrl k":
 
356
            self.server_proxy_object.RemoveClient(self.proxy
 
357
                                                  .object_path,
 
358
                                                  ignore_reply=True)
 
359
        elif key == "s":
 
360
            self.proxy.Set(client_interface, "CheckerRunning",
 
361
                           dbus.Boolean(True), ignore_reply=True,
 
362
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
363
        elif key == "S":
 
364
            self.proxy.Set(client_interface, "CheckerRunning",
 
365
                           dbus.Boolean(False), ignore_reply=True,
 
366
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
367
        elif key == "C":
 
368
            self.proxy.CheckedOK(dbus_interface=client_interface,
 
369
                                 ignore_reply=True)
 
370
        # xxx
 
371
#         elif key == "p" or key == "=":
 
372
#             self.proxy.pause()
 
373
#         elif key == "u" or key == ":":
 
374
#             self.proxy.unpause()
 
375
#         elif key == "RET":
 
376
#             self.open()
 
377
        else:
 
378
            return key
 
379
 
 
380
    def properties_changed(self, interface, properties, invalidated):
 
381
        """Call self.update() if any properties changed.
 
382
        This overrides the method from MandosClientPropertyCache"""
 
383
        old_values = {key: self.properties.get(key)
 
384
                      for key in properties.keys()}
 
385
        super(MandosClientWidget, self).properties_changed(
 
386
            interface, properties, invalidated)
 
387
        if any(old_values[key] != self.properties.get(key)
 
388
               for key in old_values):
 
389
            self.update()
 
390
 
 
391
 
 
392
def glib_safely(func, retval=True):
 
393
    def safe_func(*args, **kwargs):
 
394
        try:
 
395
            return func(*args, **kwargs)
 
396
        except Exception:
 
397
            log.exception("")
 
398
            return retval
 
399
    return safe_func
 
400
 
 
401
 
 
402
class ConstrainedListBox(urwid.ListBox):
 
403
    """Like a normal urwid.ListBox, but will consume all "up" or
 
404
    "down" key presses, thus not allowing any containing widgets to
 
405
    use them as an excuse to shift focus away from this widget.
 
406
    """
 
407
    def keypress(self, *args, **kwargs):
 
408
        ret = (super(ConstrainedListBox, self)
 
409
               .keypress(*args, **kwargs))
 
410
        if ret in ("up", "down"):
 
411
            return
 
412
        return ret
 
413
 
 
414
 
 
415
class UserInterface:
 
416
    """This is the entire user interface - the whole screen
 
417
    with boxes, lists of client widgets, etc.
 
418
    """
 
419
    def __init__(self, max_log_length=1000):
 
420
        DBusGMainLoop(set_as_default=True)
 
421
 
 
422
        self.screen = urwid.curses_display.Screen()
 
423
 
 
424
        self.screen.register_palette((
 
425
                ("normal",
 
426
                 "default", "default", None),
 
427
                ("bold",
 
428
                 "bold", "default", "bold"),
 
429
                ("underline-blink",
 
430
                 "underline,blink", "default", "underline,blink"),
 
431
                ("standout",
 
432
                 "standout", "default", "standout"),
 
433
                ("bold-underline-blink",
 
434
                 "bold,underline,blink", "default",
 
435
                 "bold,underline,blink"),
 
436
                ("bold-standout",
 
437
                 "bold,standout", "default", "bold,standout"),
 
438
                ("underline-blink-standout",
 
439
                 "underline,blink,standout", "default",
 
440
                 "underline,blink,standout"),
 
441
                ("bold-underline-blink-standout",
 
442
                 "bold,underline,blink,standout", "default",
 
443
                 "bold,underline,blink,standout"),
 
444
                ))
 
445
 
 
446
        if urwid.supports_unicode():
 
447
            self.divider = "─"  # \u2500
 
448
        else:
 
449
            self.divider = "_"  # \u005f
 
450
 
 
451
        self.screen.start()
 
452
 
 
453
        self.size = self.screen.get_cols_rows()
 
454
 
 
455
        self.clients = urwid.SimpleListWalker([])
 
456
        self.clients_dict = {}
 
457
 
 
458
        # We will add Text widgets to this list
 
459
        self.log = urwid.SimpleListWalker([])
 
460
        self.max_log_length = max_log_length
 
461
 
 
462
        # We keep a reference to the log widget so we can remove it
 
463
        # from the ListWalker without it getting destroyed
 
464
        self.logbox = ConstrainedListBox(self.log)
 
465
 
 
466
        # This keeps track of whether self.uilist currently has
 
467
        # self.logbox in it or not
 
468
        self.log_visible = True
 
469
        self.log_wrap = "any"
 
470
 
 
471
        self.loghandler = UILogHandler(self)
 
472
 
 
473
        self.rebuild()
 
474
        self.add_log_line(("bold",
 
475
                           "Mandos Monitor version " + version))
 
476
        self.add_log_line(("bold", "q: Quit  ?: Help"))
 
477
 
 
478
        self.busname = domain + ".Mandos"
 
479
        self.main_loop = GLib.MainLoop()
 
480
 
 
481
    def client_not_found(self, key_id, address):
 
482
        log.info("Client with address %s and key ID %s could"
 
483
                 " not be found", address, key_id)
 
484
 
 
485
    def rebuild(self):
 
486
        """This rebuilds the User Interface.
 
487
        Call this when the widget layout needs to change"""
 
488
        self.uilist = []
 
489
        # self.uilist.append(urwid.ListBox(self.clients))
 
490
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
491
                                                          clients),
 
492
                                       # header=urwid.Divider(),
 
493
                                       header=None,
 
494
                                       footer=urwid.Divider(
 
495
                                           div_char=self.divider)))
 
496
        if self.log_visible:
 
497
            self.uilist.append(self.logbox)
 
498
        self.topwidget = urwid.Pile(self.uilist)
 
499
 
 
500
    def add_log_line(self, markup):
 
501
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
 
502
        if self.max_log_length:
 
503
            if len(self.log) > self.max_log_length:
 
504
                del self.log[0:(len(self.log) - self.max_log_length)]
 
505
        self.logbox.set_focus(len(self.logbox.body.contents)-1,
 
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
        log.debug("Log visibility changed to: %s", self.log_visible)
 
514
 
 
515
    def change_log_display(self):
 
516
        """Change type of log display.
 
517
        Currently, this toggles wrapping of text lines."""
 
518
        if self.log_wrap == "clip":
 
519
            self.log_wrap = "any"
 
520
        else:
 
521
            self.log_wrap = "clip"
 
522
        for textwidget in self.log:
 
523
            textwidget.set_wrap_mode(self.log_wrap)
 
524
        log.debug("Wrap mode: %s", self.log_wrap)
 
525
 
 
526
    def find_and_remove_client(self, path, interfaces):
 
527
        """Find a client by its object path and remove it.
 
528
 
 
529
        This is connected to the InterfacesRemoved signal from the
 
530
        Mandos server object."""
 
531
        if client_interface not in interfaces:
 
532
            # Not a Mandos client object; ignore
 
533
            return
 
534
        try:
 
535
            client = self.clients_dict[path]
 
536
        except KeyError:
 
537
            # not found?
 
538
            log.warning("Unknown client %s removed", path)
 
539
            return
 
540
        client.delete()
 
541
 
 
542
    def add_new_client(self, path, ifs_and_props):
 
543
        """Find a client by its object path and remove it.
 
544
 
 
545
        This is connected to the InterfacesAdded signal from the
 
546
        Mandos server object.
 
547
        """
 
548
        if client_interface not in ifs_and_props:
 
549
            # Not a Mandos client object; ignore
 
550
            return
 
551
        client_proxy_object = self.bus.get_object(self.busname, path)
 
552
        self.add_client(MandosClientWidget(
 
553
            server_proxy_object=self.mandos_serv,
 
554
            proxy_object=client_proxy_object,
 
555
            update_hook=self.refresh,
 
556
            delete_hook=self.remove_client,
 
557
            properties=dict(ifs_and_props[client_interface])),
 
558
                        path=path)
 
559
 
 
560
    def add_client(self, client, path=None):
 
561
        self.clients.append(client)
 
562
        if path is None:
 
563
            path = client.proxy.object_path
 
564
        self.clients_dict[path] = client
 
565
        self.clients.sort(key=lambda c: c.properties["Name"])
 
566
        self.refresh()
 
567
 
 
568
    def remove_client(self, client, path=None):
 
569
        self.clients.remove(client)
 
570
        if path is None:
 
571
            path = client.proxy.object_path
 
572
        del self.clients_dict[path]
 
573
        self.refresh()
 
574
 
 
575
    def refresh(self):
 
576
        """Redraw the screen"""
 
577
        canvas = self.topwidget.render(self.size, focus=True)
 
578
        self.screen.draw_screen(self.size, canvas)
 
579
 
 
580
    def run(self):
 
581
        """Start the main loop and exit when it's done."""
 
582
        log.addHandler(self.loghandler)
 
583
        self.orig_log_propagate = log.propagate
 
584
        log.propagate = False
 
585
        self.orig_log_level = log.level
 
586
        log.setLevel("INFO")
 
587
        self.bus = dbus.SystemBus()
 
588
        mandos_dbus_objc = self.bus.get_object(
 
589
            self.busname, "/", follow_name_owner_changes=True)
 
590
        self.mandos_serv = dbus.Interface(
 
591
            mandos_dbus_objc, dbus_interface=server_interface)
 
592
        try:
 
593
            mandos_clients = (self.mandos_serv
 
594
                              .GetAllClientsWithProperties())
 
595
            if not mandos_clients:
 
596
                log.warning("Note: Server has no clients.")
 
597
        except dbus.exceptions.DBusException:
 
598
            log.warning("Note: No Mandos server running.")
 
599
            mandos_clients = dbus.Dictionary()
 
600
 
 
601
        (self.mandos_serv
 
602
         .connect_to_signal("InterfacesRemoved",
 
603
                            self.find_and_remove_client,
 
604
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
605
                            byte_arrays=True))
 
606
        (self.mandos_serv
 
607
         .connect_to_signal("InterfacesAdded",
 
608
                            self.add_new_client,
 
609
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
610
                            byte_arrays=True))
 
611
        (self.mandos_serv
 
612
         .connect_to_signal("ClientNotFound",
 
613
                            self.client_not_found,
 
614
                            dbus_interface=server_interface,
 
615
                            byte_arrays=True))
 
616
        for path, client in mandos_clients.items():
 
617
            client_proxy_object = self.bus.get_object(self.busname,
 
618
                                                      path)
 
619
            self.add_client(MandosClientWidget(
 
620
                server_proxy_object=self.mandos_serv,
 
621
                proxy_object=client_proxy_object,
 
622
                properties=client,
 
623
                update_hook=self.refresh,
 
624
                delete_hook=self.remove_client),
 
625
                            path=path)
 
626
 
 
627
        self.refresh()
 
628
        self._input_callback_tag = (
 
629
            GLib.io_add_watch(
 
630
                GLib.IOChannel.unix_new(sys.stdin.fileno()),
 
631
                GLib.PRIORITY_DEFAULT, GLib.IO_IN,
 
632
                glib_safely(self.process_input)))
 
633
        self.main_loop.run()
 
634
        # Main loop has finished, we should close everything now
 
635
        GLib.source_remove(self._input_callback_tag)
 
636
        with warnings.catch_warnings():
 
637
            warnings.simplefilter("ignore", BytesWarning)
 
638
            self.screen.stop()
 
639
 
 
640
    def stop(self):
 
641
        self.main_loop.quit()
 
642
        log.removeHandler(self.loghandler)
 
643
        log.propagate = self.orig_log_propagate
 
644
 
 
645
    def process_input(self, source, condition):
 
646
        keys = self.screen.get_input()
 
647
        translations = {"ctrl n": "down",       # Emacs
 
648
                        "ctrl p": "up",         # Emacs
 
649
                        "ctrl v": "page down",  # Emacs
 
650
                        "meta v": "page up",    # Emacs
 
651
                        " ": "page down",       # less
 
652
                        "f": "page down",       # less
 
653
                        "b": "page up",         # less
 
654
                        "j": "down",            # vi
 
655
                        "k": "up",              # vi
 
656
                        }
 
657
        for key in keys:
 
658
            try:
 
659
                key = translations[key]
 
660
            except KeyError:    # :-)
 
661
                pass
 
662
 
 
663
            if key == "q" or key == "Q":
 
664
                self.stop()
 
665
                break
 
666
            elif key == "window resize":
 
667
                self.size = self.screen.get_cols_rows()
 
668
                self.refresh()
 
669
            elif key == "ctrl l":
 
670
                self.screen.clear()
 
671
                self.refresh()
 
672
            elif key == "l" or key == "D":
 
673
                self.toggle_log_display()
 
674
                self.refresh()
 
675
            elif key == "w" or key == "i":
 
676
                self.change_log_display()
 
677
                self.refresh()
 
678
            elif key == "?" or key == "f1" or key == "esc":
 
679
                if not self.log_visible:
 
680
                    self.log_visible = True
 
681
                    self.rebuild()
 
682
                self.add_log_line(("bold",
 
683
                                   "  ".join(("q: Quit",
 
684
                                              "?: Help",
 
685
                                              "l: Log window toggle",
 
686
                                              "TAB: Switch window",
 
687
                                              "w: Wrap (log lines)",
 
688
                                              "v: Toggle verbose log",
 
689
                                   ))))
 
690
                self.add_log_line(("bold",
 
691
                                   "  ".join(("Clients:",
 
692
                                              "+: Enable",
 
693
                                              "-: Disable",
 
694
                                              "R: Remove",
 
695
                                              "s: Start new checker",
 
696
                                              "S: Stop checker",
 
697
                                              "C: Checker OK",
 
698
                                              "a: Approve",
 
699
                                              "d: Deny",
 
700
                                   ))))
 
701
                self.refresh()
 
702
            elif key == "tab":
 
703
                if self.topwidget.get_focus() is self.logbox:
 
704
                    self.topwidget.set_focus(0)
 
705
                else:
 
706
                    self.topwidget.set_focus(self.logbox)
 
707
                self.refresh()
 
708
            elif key == "v":
 
709
                if log.level < logging.INFO:
 
710
                    log.setLevel(logging.INFO)
 
711
                    log.info("Verbose mode: Off")
 
712
                else:
 
713
                    log.setLevel(logging.NOTSET)
 
714
                    log.info("Verbose mode: On")
 
715
            # elif (key == "end" or key == "meta >" or key == "G"
 
716
            #       or key == ">"):
 
717
            #     pass            # xxx end-of-buffer
 
718
            # elif (key == "home" or key == "meta <" or key == "g"
 
719
            #       or key == "<"):
 
720
            #     pass            # xxx beginning-of-buffer
 
721
            # elif key == "ctrl e" or key == "$":
 
722
            #     pass            # xxx move-end-of-line
 
723
            # elif key == "ctrl a" or key == "^":
 
724
            #     pass            # xxx move-beginning-of-line
 
725
            # elif key == "ctrl b" or key == "meta (" or key == "h":
 
726
            #     pass            # xxx left
 
727
            # elif key == "ctrl f" or key == "meta )" or key == "l":
 
728
            #     pass            # xxx right
 
729
            # elif key == "a":
 
730
            #     pass            # scroll up log
 
731
            # elif key == "z":
 
732
            #     pass            # scroll down log
 
733
            elif self.topwidget.selectable():
 
734
                self.topwidget.keypress(self.size, key)
 
735
                self.refresh()
 
736
        return True
 
737
 
 
738
 
 
739
class UILogHandler(logging.Handler):
 
740
    def __init__(self, ui, *args, **kwargs):
 
741
        self.ui = ui
 
742
        super(UILogHandler, self).__init__(*args, **kwargs)
 
743
        self.setFormatter(
 
744
            logging.Formatter("%(asctime)s: %(message)s"))
 
745
    def emit(self, record):
 
746
        msg = self.format(record)
 
747
        if record.levelno > logging.INFO:
 
748
            msg = ("bold", msg)
 
749
        self.ui.add_log_line(msg)
 
750
 
 
751
 
 
752
ui = UserInterface()
 
753
try:
 
754
    ui.run()
 
755
except KeyboardInterrupt:
 
756
    with warnings.catch_warnings():
 
757
        warnings.filterwarnings("ignore", "", BytesWarning)
 
758
        ui.screen.stop()
 
759
except Exception:
 
760
    with warnings.catch_warnings():
 
761
        warnings.filterwarnings("ignore", "", BytesWarning)
 
762
        ui.screen.stop()
 
763
    raise