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  • Committer: teddy at recompile
  • Date: 2020-04-05 21:30:59 UTC
  • mto: This revision was merged to the branch mainline in revision 398.
  • Revision ID: teddy@recompile.se-20200405213059-fb2a61ckqynrmatk
Fix file descriptor leak in mandos-client

When the local network has Mandos servers announcing themselves using
real, globally reachable, IPv6 addresses (i.e. not link-local
addresses), but there is no router on the local network providing IPv6
RA (Router Advertisement) packets, the client cannot reach the server
by normal means, since the client only has a link-local IPv6 address,
and has no usable route to reach the server's global IPv6 address.
(This is not a common situation, and usually only happens when the
router itself reboots and runs a Mandos client, since it cannot then
give RA packets to itself.)  The client code has a solution for
this, which consists of adding a temporary local route to reach the
address of the server during communication, and removing this
temporary route afterwards.

This solution with a temporary route works, but has a file descriptor
leak; it leaks one file descriptor for each addition and for each
removal of a route.  If one server requiring an added route is present
on the network, but no servers gives a password, making the client
retry after the default ten seconds, and we furthermore assume a
default 1024 open files limit, the client runs out of file descriptors
after about 90 minutes, after which time the client process will be
useless and fail to retrieve any passwords, necessitating manual
password entry via the keyboard.

Fix this by eliminating the file descriptor leak in the client.

* plugins.d/mandos-client.c (add_delete_local_route): Do
  close(devnull) also in parent process, also if fork() fails, and on
  any failure in child process.

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mandos-monitor
1
 
#!/usr/bin/python
 
1
#!/usr/bin/python3 -bbI
2
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
#
3
26
 
4
 
from __future__ import division, absolute_import, with_statement
 
27
from __future__ import (division, absolute_import, print_function,
 
28
                        unicode_literals)
 
29
try:
 
30
    from future_builtins import *
 
31
except ImportError:
 
32
    pass
5
33
 
6
34
import sys
7
35
import os
8
 
import signal
9
 
 
 
36
import warnings
10
37
import datetime
 
38
import locale
 
39
import logging
11
40
 
12
41
import urwid.curses_display
13
42
import urwid
14
43
 
15
44
from dbus.mainloop.glib import DBusGMainLoop
16
 
import gobject
 
45
from gi.repository import GLib
17
46
 
18
47
import dbus
19
48
 
20
 
import UserList
21
 
 
22
 
import locale
23
 
 
24
 
locale.setlocale(locale.LC_ALL, u'')
 
49
if sys.version_info.major == 2:
 
50
    __metaclass__ = type
 
51
    str = unicode
 
52
 
 
53
log = logging.getLogger(os.path.basename(sys.argv[0]))
 
54
logging.basicConfig(level="NOTSET", # Show all messages
 
55
                    format="%(message)s") # Show basic log messages
 
56
 
 
57
logging.captureWarnings(True)   # Show warnings via the logging system
 
58
 
 
59
locale.setlocale(locale.LC_ALL, "")
 
60
 
 
61
logging.getLogger("dbus.proxies").setLevel(logging.CRITICAL)
25
62
 
26
63
# Some useful constants
27
 
domain = 'se.bsnet.fukt'
28
 
server_interface = domain + '.Mandos'
29
 
client_interface = domain + '.Mandos.Client'
30
 
version = "1.0.14"
31
 
 
32
 
# Always run in monochrome mode
33
 
urwid.curses_display.curses.has_colors = lambda : False
34
 
 
35
 
# Urwid doesn't support blinking, but we want it.  Since we have no
36
 
# use for underline on its own, we make underline also always blink.
37
 
urwid.curses_display.curses.A_UNDERLINE |= (
38
 
    urwid.curses_display.curses.A_BLINK)
 
64
domain = "se.recompile"
 
65
server_interface = domain + ".Mandos"
 
66
client_interface = domain + ".Mandos.Client"
 
67
version = "1.8.10"
 
68
 
 
69
try:
 
70
    dbus.OBJECT_MANAGER_IFACE
 
71
except AttributeError:
 
72
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
73
 
39
74
 
40
75
def isoformat_to_datetime(iso):
41
76
    "Parse an ISO 8601 date string to a datetime.datetime()"
42
77
    if not iso:
43
78
        return None
44
 
    d, t = iso.split(u"T", 1)
45
 
    year, month, day = d.split(u"-", 2)
46
 
    hour, minute, second = t.split(u":", 2)
 
79
    d, t = iso.split("T", 1)
 
80
    year, month, day = d.split("-", 2)
 
81
    hour, minute, second = t.split(":", 2)
47
82
    second, fraction = divmod(float(second), 1)
48
83
    return datetime.datetime(int(year),
49
84
                             int(month),
50
85
                             int(day),
51
86
                             int(hour),
52
87
                             int(minute),
53
 
                             int(second),           # Whole seconds
54
 
                             int(fraction*1000000)) # Microseconds
55
 
 
56
 
class MandosClientPropertyCache(object):
 
88
                             int(second),            # Whole seconds
 
89
                             int(fraction*1000000))  # Microseconds
 
90
 
 
91
 
 
92
class MandosClientPropertyCache:
57
93
    """This wraps a Mandos Client D-Bus proxy object, caches the
58
94
    properties and calls a hook function when any of them are
59
95
    changed.
60
96
    """
61
 
    def __init__(self, proxy_object=None, *args, **kwargs):
62
 
        self.proxy = proxy_object # Mandos Client proxy object
63
 
        
64
 
        self.properties = dict()
65
 
        self.proxy.connect_to_signal(u"PropertyChanged",
66
 
                                     self.property_changed,
67
 
                                     client_interface,
68
 
                                     byte_arrays=True)
69
 
        
70
 
        self.properties.update(
71
 
            self.proxy.GetAll(client_interface,
72
 
                              dbus_interface = dbus.PROPERTIES_IFACE))
73
 
        super(MandosClientPropertyCache, self).__init__(
74
 
            proxy_object=proxy_object, *args, **kwargs)
75
 
    
76
 
    def property_changed(self, property=None, value=None):
77
 
        """This is called whenever we get a PropertyChanged signal
78
 
        It updates the changed property in the "properties" dict.
 
97
    def __init__(self, proxy_object=None, properties=None, **kwargs):
 
98
        self.proxy = proxy_object  # Mandos Client proxy object
 
99
        self.properties = dict() if properties is None else properties
 
100
        self.property_changed_match = (
 
101
            self.proxy.connect_to_signal("PropertiesChanged",
 
102
                                         self.properties_changed,
 
103
                                         dbus.PROPERTIES_IFACE,
 
104
                                         byte_arrays=True))
 
105
 
 
106
        if properties is None:
 
107
            self.properties.update(self.proxy.GetAll(
 
108
                client_interface,
 
109
                dbus_interface=dbus.PROPERTIES_IFACE))
 
110
 
 
111
        super(MandosClientPropertyCache, self).__init__(**kwargs)
 
112
 
 
113
    def properties_changed(self, interface, properties, invalidated):
 
114
        """This is called whenever we get a PropertiesChanged signal
 
115
        It updates the changed properties in the "properties" dict.
79
116
        """
80
117
        # Update properties dict with new value
81
 
        self.properties[property] = value
 
118
        if interface == client_interface:
 
119
            self.properties.update(properties)
 
120
 
 
121
    def delete(self):
 
122
        self.property_changed_match.remove()
82
123
 
83
124
 
84
125
class MandosClientWidget(urwid.FlowWidget, MandosClientPropertyCache):
85
126
    """A Mandos Client which is visible on the screen.
86
127
    """
87
 
    
 
128
 
88
129
    def __init__(self, server_proxy_object=None, update_hook=None,
89
 
                 delete_hook=None, logger=None, *args, **kwargs):
 
130
                 delete_hook=None, **kwargs):
90
131
        # Called on update
91
132
        self.update_hook = update_hook
92
133
        # Called on delete
93
134
        self.delete_hook = delete_hook
94
135
        # Mandos Server proxy object
95
136
        self.server_proxy_object = server_proxy_object
96
 
        # Logger
97
 
        self.logger = logger
98
 
        
 
137
 
99
138
        self._update_timer_callback_tag = None
100
 
        self.last_checker_failed = False
101
 
        
 
139
 
102
140
        # The widget shown normally
103
 
        self._text_widget = urwid.Text(u"")
 
141
        self._text_widget = urwid.Text("")
104
142
        # The widget shown when we have focus
105
 
        self._focus_text_widget = urwid.Text(u"")
106
 
        super(MandosClientWidget, self).__init__(
107
 
            update_hook=update_hook, delete_hook=delete_hook,
108
 
            *args, **kwargs)
 
143
        self._focus_text_widget = urwid.Text("")
 
144
        super(MandosClientWidget, self).__init__(**kwargs)
109
145
        self.update()
110
146
        self.opened = False
111
 
        self.proxy.connect_to_signal(u"CheckerCompleted",
112
 
                                     self.checker_completed,
113
 
                                     client_interface,
114
 
                                     byte_arrays=True)
115
 
        self.proxy.connect_to_signal(u"CheckerStarted",
116
 
                                     self.checker_started,
117
 
                                     client_interface,
118
 
                                     byte_arrays=True)
119
 
        self.proxy.connect_to_signal(u"GotSecret",
120
 
                                     self.got_secret,
121
 
                                     client_interface,
122
 
                                     byte_arrays=True)
123
 
        self.proxy.connect_to_signal(u"Rejected",
124
 
                                     self.rejected,
125
 
                                     client_interface,
126
 
                                     byte_arrays=True)
127
 
        last_checked_ok = isoformat_to_datetime(self.properties
128
 
                                                ["last_checked_ok"])
129
 
        if last_checked_ok is None:
130
 
            self.last_checker_failed = True
131
 
        else:
132
 
            self.last_checker_failed = ((datetime.datetime.utcnow()
133
 
                                         - last_checked_ok)
134
 
                                        > datetime.timedelta
135
 
                                        (milliseconds=
136
 
                                         self.properties["interval"]))
137
 
        if self.last_checker_failed:
138
 
            self._update_timer_callback_tag = (gobject.timeout_add
139
 
                                               (1000,
140
 
                                                self.update_timer))
141
 
    
 
147
 
 
148
        self.match_objects = (
 
149
            self.proxy.connect_to_signal("CheckerCompleted",
 
150
                                         self.checker_completed,
 
151
                                         client_interface,
 
152
                                         byte_arrays=True),
 
153
            self.proxy.connect_to_signal("CheckerStarted",
 
154
                                         self.checker_started,
 
155
                                         client_interface,
 
156
                                         byte_arrays=True),
 
157
            self.proxy.connect_to_signal("GotSecret",
 
158
                                         self.got_secret,
 
159
                                         client_interface,
 
160
                                         byte_arrays=True),
 
161
            self.proxy.connect_to_signal("NeedApproval",
 
162
                                         self.need_approval,
 
163
                                         client_interface,
 
164
                                         byte_arrays=True),
 
165
            self.proxy.connect_to_signal("Rejected",
 
166
                                         self.rejected,
 
167
                                         client_interface,
 
168
                                         byte_arrays=True))
 
169
        log.debug("Created client %s", self.properties["Name"])
 
170
 
 
171
    def using_timer(self, flag):
 
172
        """Call this method with True or False when timer should be
 
173
        activated or deactivated.
 
174
        """
 
175
        if flag and self._update_timer_callback_tag is None:
 
176
            # Will update the shown timer value every second
 
177
            self._update_timer_callback_tag = (
 
178
                GLib.timeout_add(1000,
 
179
                                 glib_safely(self.update_timer)))
 
180
        elif not (flag or self._update_timer_callback_tag is None):
 
181
            GLib.source_remove(self._update_timer_callback_tag)
 
182
            self._update_timer_callback_tag = None
 
183
 
142
184
    def checker_completed(self, exitstatus, condition, command):
143
185
        if exitstatus == 0:
144
 
            if self.last_checker_failed:
145
 
                self.last_checker_failed = False
146
 
                gobject.source_remove(self._update_timer_callback_tag)
147
 
                self._update_timer_callback_tag = None
148
 
            self.logger(u'Checker for client %s (command "%s")'
149
 
                        u' was successful'
150
 
                        % (self.properties[u"name"], command))
 
186
            log.debug('Checker for client %s (command "%s")'
 
187
                      " succeeded", self.properties["Name"], command)
151
188
            self.update()
152
189
            return
153
190
        # Checker failed
154
 
        if not self.last_checker_failed:
155
 
            self.last_checker_failed = True
156
 
            self._update_timer_callback_tag = (gobject.timeout_add
157
 
                                               (1000,
158
 
                                                self.update_timer))
159
191
        if os.WIFEXITED(condition):
160
 
            self.logger(u'Checker for client %s (command "%s")'
161
 
                        u' failed with exit code %s'
162
 
                        % (self.properties[u"name"], command,
163
 
                           os.WEXITSTATUS(condition)))
 
192
            log.info('Checker for client %s (command "%s") failed'
 
193
                     " with exit code %d", self.properties["Name"],
 
194
                     command, os.WEXITSTATUS(condition))
164
195
        elif os.WIFSIGNALED(condition):
165
 
            self.logger(u'Checker for client %s (command "%s")'
166
 
                        u' was killed by signal %s'
167
 
                        % (self.properties[u"name"], command,
168
 
                           os.WTERMSIG(condition)))
169
 
        elif os.WCOREDUMP(condition):
170
 
            self.logger(u'Checker for client %s (command "%s")'
171
 
                        u' dumped core'
172
 
                        % (self.properties[u"name"], command))
173
 
        else:
174
 
            self.logger(u'Checker for client %s completed mysteriously')
 
196
            log.info('Checker for client %s (command "%s") was'
 
197
                     " killed by signal %d", self.properties["Name"],
 
198
                     command, os.WTERMSIG(condition))
175
199
        self.update()
176
 
    
 
200
 
177
201
    def checker_started(self, command):
178
 
        self.logger(u'Client %s started checker "%s"'
179
 
                    % (self.properties[u"name"], unicode(command)))
180
 
    
 
202
        """Server signals that a checker started."""
 
203
        log.debug('Client %s started checker "%s"',
 
204
                  self.properties["Name"], command)
 
205
 
181
206
    def got_secret(self):
182
 
        self.logger(u'Client %s received its secret'
183
 
                    % self.properties[u"name"])
184
 
    
185
 
    def rejected(self):
186
 
        self.logger(u'Client %s was rejected'
187
 
                    % self.properties[u"name"])
188
 
    
 
207
        log.info("Client %s received its secret",
 
208
                 self.properties["Name"])
 
209
 
 
210
    def need_approval(self, timeout, default):
 
211
        if not default:
 
212
            message = "Client %s needs approval within %f seconds"
 
213
        else:
 
214
            message = "Client %s will get its secret in %f seconds"
 
215
        log.info(message, self.properties["Name"], timeout/1000)
 
216
 
 
217
    def rejected(self, reason):
 
218
        log.info("Client %s was rejected; reason: %s",
 
219
                 self.properties["Name"], reason)
 
220
 
189
221
    def selectable(self):
190
222
        """Make this a "selectable" widget.
191
223
        This overrides the method from urwid.FlowWidget."""
192
224
        return True
193
 
    
194
 
    def rows(self, (maxcol,), focus=False):
 
225
 
 
226
    def rows(self, maxcolrow, focus=False):
195
227
        """How many rows this widget will occupy might depend on
196
228
        whether we have focus or not.
197
229
        This overrides the method from urwid.FlowWidget"""
198
 
        return self.current_widget(focus).rows((maxcol,), focus=focus)
199
 
    
 
230
        return self.current_widget(focus).rows(maxcolrow, focus=focus)
 
231
 
200
232
    def current_widget(self, focus=False):
201
233
        if focus or self.opened:
202
234
            return self._focus_widget
203
235
        return self._widget
204
 
    
 
236
 
205
237
    def update(self):
206
238
        "Called when what is visible on the screen should be updated."
207
239
        # How to add standout mode to a style
208
 
        with_standout = { u"normal": u"standout",
209
 
                          u"bold": u"bold-standout",
210
 
                          u"underline-blink":
211
 
                              u"underline-blink-standout",
212
 
                          u"bold-underline-blink":
213
 
                              u"bold-underline-blink-standout",
214
 
                          }
215
 
        
 
240
        with_standout = {"normal": "standout",
 
241
                         "bold": "bold-standout",
 
242
                         "underline-blink":
 
243
                         "underline-blink-standout",
 
244
                         "bold-underline-blink":
 
245
                         "bold-underline-blink-standout",
 
246
                         }
 
247
 
216
248
        # Rebuild focus and non-focus widgets using current properties
217
 
        self._text = (u'%(name)s: %(enabled)s%(timer)s'
218
 
                      % { u"name": self.properties[u"name"],
219
 
                          u"enabled":
220
 
                              (u"enabled"
221
 
                               if self.properties[u"enabled"]
222
 
                               else u"DISABLED"),
223
 
                          u"timer": (unicode(datetime.timedelta
224
 
                                             (milliseconds =
225
 
                                              self.properties
226
 
                                              [u"timeout"])
227
 
                                             - (datetime.datetime
228
 
                                                .utcnow()
229
 
                                                - isoformat_to_datetime
230
 
                                                (max((self.properties
231
 
                                                 ["last_checked_ok"]
232
 
                                                 or
233
 
                                                 self.properties
234
 
                                                 ["created"]),
235
 
                                                    self.properties[u"last_enabled"]))))
236
 
                                     if (self.last_checker_failed
237
 
                                         and self.properties
238
 
                                         [u"enabled"])
239
 
                                     else u"")})
 
249
 
 
250
        # Base part of a client. Name!
 
251
        base = "{name}: ".format(name=self.properties["Name"])
 
252
        if not self.properties["Enabled"]:
 
253
            message = "DISABLED"
 
254
            self.using_timer(False)
 
255
        elif self.properties["ApprovalPending"]:
 
256
            timeout = datetime.timedelta(
 
257
                milliseconds=self.properties["ApprovalDelay"])
 
258
            last_approval_request = isoformat_to_datetime(
 
259
                self.properties["LastApprovalRequest"])
 
260
            if last_approval_request is not None:
 
261
                timer = max(timeout - (datetime.datetime.utcnow()
 
262
                                       - last_approval_request),
 
263
                            datetime.timedelta())
 
264
            else:
 
265
                timer = datetime.timedelta()
 
266
            if self.properties["ApprovedByDefault"]:
 
267
                message = "Approval in {}. (d)eny?"
 
268
            else:
 
269
                message = "Denial in {}. (a)pprove?"
 
270
            message = message.format(str(timer).rsplit(".", 1)[0])
 
271
            self.using_timer(True)
 
272
        elif self.properties["LastCheckerStatus"] != 0:
 
273
            # When checker has failed, show timer until client expires
 
274
            expires = self.properties["Expires"]
 
275
            if expires == "":
 
276
                timer = datetime.timedelta(0)
 
277
            else:
 
278
                expires = (datetime.datetime.strptime
 
279
                           (expires, "%Y-%m-%dT%H:%M:%S.%f"))
 
280
                timer = max(expires - datetime.datetime.utcnow(),
 
281
                            datetime.timedelta())
 
282
            message = ("A checker has failed! Time until client"
 
283
                       " gets disabled: {}"
 
284
                       .format(str(timer).rsplit(".", 1)[0]))
 
285
            self.using_timer(True)
 
286
        else:
 
287
            message = "enabled"
 
288
            self.using_timer(False)
 
289
        self._text = "{}{}".format(base, message)
 
290
 
240
291
        if not urwid.supports_unicode():
241
292
            self._text = self._text.encode("ascii", "replace")
242
 
        textlist = [(u"normal", self._text)]
 
293
        textlist = [("normal", self._text)]
243
294
        self._text_widget.set_text(textlist)
244
295
        self._focus_text_widget.set_text([(with_standout[text[0]],
245
296
                                           text[1])
252
303
        # Run update hook, if any
253
304
        if self.update_hook is not None:
254
305
            self.update_hook()
255
 
    
 
306
 
256
307
    def update_timer(self):
257
 
        "called by gobject"
 
308
        """called by GLib. Will indefinitely loop until
 
309
        GLib.source_remove() on tag is called
 
310
        """
258
311
        self.update()
259
312
        return True             # Keep calling this
260
 
    
261
 
    def delete(self):
 
313
 
 
314
    def delete(self, **kwargs):
262
315
        if self._update_timer_callback_tag is not None:
263
 
            gobject.source_remove(self._update_timer_callback_tag)
 
316
            GLib.source_remove(self._update_timer_callback_tag)
264
317
            self._update_timer_callback_tag = None
 
318
        for match in self.match_objects:
 
319
            match.remove()
 
320
        self.match_objects = ()
265
321
        if self.delete_hook is not None:
266
322
            self.delete_hook(self)
267
 
    
268
 
    def render(self, (maxcol,), focus=False):
 
323
        return super(MandosClientWidget, self).delete(**kwargs)
 
324
 
 
325
    def render(self, maxcolrow, focus=False):
269
326
        """Render differently if we have focus.
270
327
        This overrides the method from urwid.FlowWidget"""
271
 
        return self.current_widget(focus).render((maxcol,),
 
328
        return self.current_widget(focus).render(maxcolrow,
272
329
                                                 focus=focus)
273
 
    
274
 
    def keypress(self, (maxcol,), key):
 
330
 
 
331
    def keypress(self, maxcolrow, key):
275
332
        """Handle keys.
276
333
        This overrides the method from urwid.FlowWidget"""
277
 
        if key == u"e" or key == u"+":
278
 
            self.proxy.Enable()
279
 
        elif key == u"d" or key == u"-":
280
 
            self.proxy.Disable()
281
 
        elif key == u"r" or key == u"_" or key == u"ctrl k":
 
334
        if key == "+":
 
335
            self.proxy.Set(client_interface, "Enabled",
 
336
                           dbus.Boolean(True), ignore_reply=True,
 
337
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
338
        elif key == "-":
 
339
            self.proxy.Set(client_interface, "Enabled", False,
 
340
                           ignore_reply=True,
 
341
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
342
        elif key == "a":
 
343
            self.proxy.Approve(dbus.Boolean(True, variant_level=1),
 
344
                               dbus_interface=client_interface,
 
345
                               ignore_reply=True)
 
346
        elif key == "d":
 
347
            self.proxy.Approve(dbus.Boolean(False, variant_level=1),
 
348
                               dbus_interface=client_interface,
 
349
                               ignore_reply=True)
 
350
        elif key == "R" or key == "_" or key == "ctrl k":
282
351
            self.server_proxy_object.RemoveClient(self.proxy
283
 
                                                  .object_path)
284
 
        elif key == u"s":
285
 
            self.proxy.StartChecker()
286
 
        elif key == u"S":
287
 
            self.proxy.StopChecker()
288
 
        elif key == u"C":
289
 
            self.proxy.CheckedOK()
 
352
                                                  .object_path,
 
353
                                                  ignore_reply=True)
 
354
        elif key == "s":
 
355
            self.proxy.Set(client_interface, "CheckerRunning",
 
356
                           dbus.Boolean(True), ignore_reply=True,
 
357
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
358
        elif key == "S":
 
359
            self.proxy.Set(client_interface, "CheckerRunning",
 
360
                           dbus.Boolean(False), ignore_reply=True,
 
361
                           dbus_interface=dbus.PROPERTIES_IFACE)
 
362
        elif key == "C":
 
363
            self.proxy.CheckedOK(dbus_interface=client_interface,
 
364
                                 ignore_reply=True)
290
365
        # xxx
291
 
#         elif key == u"p" or key == "=":
 
366
#         elif key == "p" or key == "=":
292
367
#             self.proxy.pause()
293
 
#         elif key == u"u" or key == ":":
 
368
#         elif key == "u" or key == ":":
294
369
#             self.proxy.unpause()
295
 
#         elif key == u"RET":
 
370
#         elif key == "RET":
296
371
#             self.open()
297
372
        else:
298
373
            return key
299
 
    
300
 
    def property_changed(self, property=None, value=None,
301
 
                         *args, **kwargs):
302
 
        """Call self.update() if old value is not new value.
 
374
 
 
375
    def properties_changed(self, interface, properties, invalidated):
 
376
        """Call self.update() if any properties changed.
303
377
        This overrides the method from MandosClientPropertyCache"""
304
 
        property_name = unicode(property)
305
 
        old_value = self.properties.get(property_name)
306
 
        super(MandosClientWidget, self).property_changed(
307
 
            property=property, value=value, *args, **kwargs)
308
 
        if self.properties.get(property_name) != old_value:
 
378
        old_values = {key: self.properties.get(key)
 
379
                      for key in properties.keys()}
 
380
        super(MandosClientWidget, self).properties_changed(
 
381
            interface, properties, invalidated)
 
382
        if any(old_values[key] != self.properties.get(key)
 
383
               for key in old_values):
309
384
            self.update()
310
385
 
311
386
 
 
387
def glib_safely(func, retval=True):
 
388
    def safe_func(*args, **kwargs):
 
389
        try:
 
390
            return func(*args, **kwargs)
 
391
        except Exception:
 
392
            log.exception("")
 
393
            return retval
 
394
    return safe_func
 
395
 
 
396
 
312
397
class ConstrainedListBox(urwid.ListBox):
313
398
    """Like a normal urwid.ListBox, but will consume all "up" or
314
399
    "down" key presses, thus not allowing any containing widgets to
315
400
    use them as an excuse to shift focus away from this widget.
316
401
    """
317
 
    def keypress(self, (maxcol, maxrow), key):
318
 
        ret = super(ConstrainedListBox, self).keypress((maxcol, maxrow), key)
319
 
        if ret in (u"up", u"down"):
 
402
    def keypress(self, *args, **kwargs):
 
403
        ret = (super(ConstrainedListBox, self)
 
404
               .keypress(*args, **kwargs))
 
405
        if ret in ("up", "down"):
320
406
            return
321
407
        return ret
322
408
 
323
409
 
324
 
class UserInterface(object):
 
410
class UserInterface:
325
411
    """This is the entire user interface - the whole screen
326
412
    with boxes, lists of client widgets, etc.
327
413
    """
328
414
    def __init__(self, max_log_length=1000):
329
415
        DBusGMainLoop(set_as_default=True)
330
 
        
 
416
 
331
417
        self.screen = urwid.curses_display.Screen()
332
 
        
 
418
 
333
419
        self.screen.register_palette((
334
 
                (u"normal",
335
 
                 u"default", u"default", None),
336
 
                (u"bold",
337
 
                 u"default", u"default", u"bold"),
338
 
                (u"underline-blink",
339
 
                 u"default", u"default", u"underline"),
340
 
                (u"standout",
341
 
                 u"default", u"default", u"standout"),
342
 
                (u"bold-underline-blink",
343
 
                 u"default", u"default", (u"bold", u"underline")),
344
 
                (u"bold-standout",
345
 
                 u"default", u"default", (u"bold", u"standout")),
346
 
                (u"underline-blink-standout",
347
 
                 u"default", u"default", (u"underline", u"standout")),
348
 
                (u"bold-underline-blink-standout",
349
 
                 u"default", u"default", (u"bold", u"underline",
350
 
                                          u"standout")),
 
420
                ("normal",
 
421
                 "default", "default", None),
 
422
                ("bold",
 
423
                 "bold", "default", "bold"),
 
424
                ("underline-blink",
 
425
                 "underline,blink", "default", "underline,blink"),
 
426
                ("standout",
 
427
                 "standout", "default", "standout"),
 
428
                ("bold-underline-blink",
 
429
                 "bold,underline,blink", "default",
 
430
                 "bold,underline,blink"),
 
431
                ("bold-standout",
 
432
                 "bold,standout", "default", "bold,standout"),
 
433
                ("underline-blink-standout",
 
434
                 "underline,blink,standout", "default",
 
435
                 "underline,blink,standout"),
 
436
                ("bold-underline-blink-standout",
 
437
                 "bold,underline,blink,standout", "default",
 
438
                 "bold,underline,blink,standout"),
351
439
                ))
352
 
        
 
440
 
353
441
        if urwid.supports_unicode():
354
 
            self.divider = u"─" # \u2500
355
 
            #self.divider = u"━" # \u2501
 
442
            self.divider = "─"  # \u2500
356
443
        else:
357
 
            #self.divider = u"-" # \u002d
358
 
            self.divider = u"_" # \u005f
359
 
        
 
444
            self.divider = "_"  # \u005f
 
445
 
360
446
        self.screen.start()
361
 
        
 
447
 
362
448
        self.size = self.screen.get_cols_rows()
363
 
        
 
449
 
364
450
        self.clients = urwid.SimpleListWalker([])
365
451
        self.clients_dict = {}
366
 
        
 
452
 
367
453
        # We will add Text widgets to this list
368
 
        self.log = []
 
454
        self.log = urwid.SimpleListWalker([])
369
455
        self.max_log_length = max_log_length
370
 
        
 
456
 
371
457
        # We keep a reference to the log widget so we can remove it
372
458
        # from the ListWalker without it getting destroyed
373
459
        self.logbox = ConstrainedListBox(self.log)
374
 
        
 
460
 
375
461
        # This keeps track of whether self.uilist currently has
376
462
        # self.logbox in it or not
377
463
        self.log_visible = True
378
 
        self.log_wrap = u"any"
379
 
        
 
464
        self.log_wrap = "any"
 
465
 
 
466
        self.loghandler = UILogHandler(self)
 
467
 
380
468
        self.rebuild()
381
 
        self.log_message_raw((u"bold",
382
 
                              u"Mandos Monitor version " + version))
383
 
        self.log_message_raw((u"bold",
384
 
                              u"q: Quit  ?: Help"))
385
 
        
386
 
        self.busname = domain + '.Mandos'
387
 
        self.main_loop = gobject.MainLoop()
388
 
        self.bus = dbus.SystemBus()
389
 
        mandos_dbus_objc = self.bus.get_object(
390
 
            self.busname, u"/", follow_name_owner_changes=True)
391
 
        self.mandos_serv = dbus.Interface(mandos_dbus_objc,
392
 
                                          dbus_interface
393
 
                                          = server_interface)
394
 
        try:
395
 
            mandos_clients = (self.mandos_serv
396
 
                              .GetAllClientsWithProperties())
397
 
        except dbus.exceptions.DBusException:
398
 
            mandos_clients = dbus.Dictionary()
399
 
        
400
 
        (self.mandos_serv
401
 
         .connect_to_signal(u"ClientRemoved",
402
 
                            self.find_and_remove_client,
403
 
                            dbus_interface=server_interface,
404
 
                            byte_arrays=True))
405
 
        (self.mandos_serv
406
 
         .connect_to_signal(u"ClientAdded",
407
 
                            self.add_new_client,
408
 
                            dbus_interface=server_interface,
409
 
                            byte_arrays=True))
410
 
        (self.mandos_serv
411
 
         .connect_to_signal(u"ClientNotFound",
412
 
                            self.client_not_found,
413
 
                            dbus_interface=server_interface,
414
 
                            byte_arrays=True))
415
 
        for path, client in mandos_clients.iteritems():
416
 
            client_proxy_object = self.bus.get_object(self.busname,
417
 
                                                      path)
418
 
            self.add_client(MandosClientWidget(server_proxy_object
419
 
                                               =self.mandos_serv,
420
 
                                               proxy_object
421
 
                                               =client_proxy_object,
422
 
                                               properties=client,
423
 
                                               update_hook
424
 
                                               =self.refresh,
425
 
                                               delete_hook
426
 
                                               =self.remove_client,
427
 
                                               logger
428
 
                                               =self.log_message),
429
 
                            path=path)
430
 
    
431
 
    def client_not_found(self, fingerprint, address):
432
 
        self.log_message((u"Client with address %s and fingerprint %s"
433
 
                          u" could not be found" % (address,
434
 
                                                    fingerprint)))
435
 
    
 
469
        self.add_log_line(("bold",
 
470
                           "Mandos Monitor version " + version))
 
471
        self.add_log_line(("bold", "q: Quit  ?: Help"))
 
472
 
 
473
        self.busname = domain + ".Mandos"
 
474
        self.main_loop = GLib.MainLoop()
 
475
 
 
476
    def client_not_found(self, key_id, address):
 
477
        log.info("Client with address %s and key ID %s could"
 
478
                 " not be found", address, key_id)
 
479
 
436
480
    def rebuild(self):
437
481
        """This rebuilds the User Interface.
438
482
        Call this when the widget layout needs to change"""
439
483
        self.uilist = []
440
 
        #self.uilist.append(urwid.ListBox(self.clients))
441
 
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.clients),
442
 
                                       #header=urwid.Divider(),
 
484
        # self.uilist.append(urwid.ListBox(self.clients))
 
485
        self.uilist.append(urwid.Frame(ConstrainedListBox(self.
 
486
                                                          clients),
 
487
                                       # header=urwid.Divider(),
443
488
                                       header=None,
444
 
                                       footer=urwid.Divider(div_char=self.divider)))
 
489
                                       footer=urwid.Divider(
 
490
                                           div_char=self.divider)))
445
491
        if self.log_visible:
446
492
            self.uilist.append(self.logbox)
447
 
            pass
448
493
        self.topwidget = urwid.Pile(self.uilist)
449
 
    
450
 
    def log_message(self, message):
451
 
        timestamp = datetime.datetime.now().isoformat()
452
 
        self.log_message_raw(timestamp + u": " + message)
453
 
    
454
 
    def log_message_raw(self, markup):
455
 
        """Add a log message to the log buffer."""
 
494
 
 
495
    def add_log_line(self, markup):
456
496
        self.log.append(urwid.Text(markup, wrap=self.log_wrap))
457
 
        if (self.max_log_length
458
 
            and len(self.log) > self.max_log_length):
459
 
            del self.log[0:len(self.log)-self.max_log_length-1]
460
 
        self.logbox.set_focus(len(self.logbox.body.contents),
461
 
                              coming_from=u"above")
 
497
        if self.max_log_length:
 
498
            if len(self.log) > self.max_log_length:
 
499
                del self.log[0:(len(self.log) - self.max_log_length)]
 
500
        self.logbox.set_focus(len(self.logbox.body.contents)-1,
 
501
                              coming_from="above")
462
502
        self.refresh()
463
 
    
 
503
 
464
504
    def toggle_log_display(self):
465
505
        """Toggle visibility of the log buffer."""
466
506
        self.log_visible = not self.log_visible
467
507
        self.rebuild()
468
 
        self.log_message(u"Log visibility changed to: "
469
 
                         + unicode(self.log_visible))
470
 
    
 
508
        log.debug("Log visibility changed to: %s", self.log_visible)
 
509
 
471
510
    def change_log_display(self):
472
511
        """Change type of log display.
473
512
        Currently, this toggles wrapping of text lines."""
474
 
        if self.log_wrap == u"clip":
475
 
            self.log_wrap = u"any"
 
513
        if self.log_wrap == "clip":
 
514
            self.log_wrap = "any"
476
515
        else:
477
 
            self.log_wrap = u"clip"
 
516
            self.log_wrap = "clip"
478
517
        for textwidget in self.log:
479
518
            textwidget.set_wrap_mode(self.log_wrap)
480
 
        self.log_message(u"Wrap mode: " + self.log_wrap)
481
 
    
482
 
    def find_and_remove_client(self, path, name):
483
 
        """Find an client from its object path and remove it.
484
 
        
485
 
        This is connected to the ClientRemoved signal from the
 
519
        log.debug("Wrap mode: %s", self.log_wrap)
 
520
 
 
521
    def find_and_remove_client(self, path, interfaces):
 
522
        """Find a client by its object path and remove it.
 
523
 
 
524
        This is connected to the InterfacesRemoved signal from the
486
525
        Mandos server object."""
 
526
        if client_interface not in interfaces:
 
527
            # Not a Mandos client object; ignore
 
528
            return
487
529
        try:
488
530
            client = self.clients_dict[path]
489
531
        except KeyError:
490
532
            # not found?
491
 
            return
492
 
        self.remove_client(client, path)
493
 
    
494
 
    def add_new_client(self, path):
 
533
            log.warning("Unknown client %s removed", path)
 
534
            return
 
535
        client.delete()
 
536
 
 
537
    def add_new_client(self, path, ifs_and_props):
 
538
        """Find a client by its object path and remove it.
 
539
 
 
540
        This is connected to the InterfacesAdded signal from the
 
541
        Mandos server object.
 
542
        """
 
543
        if client_interface not in ifs_and_props:
 
544
            # Not a Mandos client object; ignore
 
545
            return
495
546
        client_proxy_object = self.bus.get_object(self.busname, path)
496
 
        self.add_client(MandosClientWidget(server_proxy_object
497
 
                                           =self.mandos_serv,
498
 
                                           proxy_object
499
 
                                           =client_proxy_object,
500
 
                                           update_hook
501
 
                                           =self.refresh,
502
 
                                           delete_hook
503
 
                                           =self.remove_client,
504
 
                                           logger
505
 
                                           =self.log_message),
 
547
        self.add_client(MandosClientWidget(
 
548
            server_proxy_object=self.mandos_serv,
 
549
            proxy_object=client_proxy_object,
 
550
            update_hook=self.refresh,
 
551
            delete_hook=self.remove_client,
 
552
            properties=dict(ifs_and_props[client_interface])),
506
553
                        path=path)
507
 
    
 
554
 
508
555
    def add_client(self, client, path=None):
509
556
        self.clients.append(client)
510
557
        if path is None:
511
558
            path = client.proxy.object_path
512
559
        self.clients_dict[path] = client
513
 
        self.clients.sort(None, lambda c: c.properties[u"name"])
 
560
        self.clients.sort(key=lambda c: c.properties["Name"])
514
561
        self.refresh()
515
 
    
 
562
 
516
563
    def remove_client(self, client, path=None):
517
564
        self.clients.remove(client)
518
565
        if path is None:
519
566
            path = client.proxy.object_path
520
567
        del self.clients_dict[path]
521
 
        if not self.clients_dict:
522
 
            # Work around bug in Urwid 0.9.8.3 - if a SimpleListWalker
523
 
            # is completely emptied, we need to recreate it.
524
 
            self.clients = urwid.SimpleListWalker([])
525
 
            self.rebuild()
526
568
        self.refresh()
527
 
    
 
569
 
528
570
    def refresh(self):
529
571
        """Redraw the screen"""
530
572
        canvas = self.topwidget.render(self.size, focus=True)
531
573
        self.screen.draw_screen(self.size, canvas)
532
 
    
 
574
 
533
575
    def run(self):
534
576
        """Start the main loop and exit when it's done."""
 
577
        log.addHandler(self.loghandler)
 
578
        self.orig_log_propagate = log.propagate
 
579
        log.propagate = False
 
580
        self.orig_log_level = log.level
 
581
        log.setLevel("INFO")
 
582
        self.bus = dbus.SystemBus()
 
583
        mandos_dbus_objc = self.bus.get_object(
 
584
            self.busname, "/", follow_name_owner_changes=True)
 
585
        self.mandos_serv = dbus.Interface(
 
586
            mandos_dbus_objc, dbus_interface=server_interface)
 
587
        try:
 
588
            mandos_clients = (self.mandos_serv
 
589
                              .GetAllClientsWithProperties())
 
590
            if not mandos_clients:
 
591
                log.warning("Note: Server has no clients.")
 
592
        except dbus.exceptions.DBusException:
 
593
            log.warning("Note: No Mandos server running.")
 
594
            mandos_clients = dbus.Dictionary()
 
595
 
 
596
        (self.mandos_serv
 
597
         .connect_to_signal("InterfacesRemoved",
 
598
                            self.find_and_remove_client,
 
599
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
600
                            byte_arrays=True))
 
601
        (self.mandos_serv
 
602
         .connect_to_signal("InterfacesAdded",
 
603
                            self.add_new_client,
 
604
                            dbus_interface=dbus.OBJECT_MANAGER_IFACE,
 
605
                            byte_arrays=True))
 
606
        (self.mandos_serv
 
607
         .connect_to_signal("ClientNotFound",
 
608
                            self.client_not_found,
 
609
                            dbus_interface=server_interface,
 
610
                            byte_arrays=True))
 
611
        for path, client in mandos_clients.items():
 
612
            client_proxy_object = self.bus.get_object(self.busname,
 
613
                                                      path)
 
614
            self.add_client(MandosClientWidget(
 
615
                server_proxy_object=self.mandos_serv,
 
616
                proxy_object=client_proxy_object,
 
617
                properties=client,
 
618
                update_hook=self.refresh,
 
619
                delete_hook=self.remove_client),
 
620
                            path=path)
 
621
 
535
622
        self.refresh()
536
 
        self._input_callback_tag = (gobject.io_add_watch
537
 
                                    (sys.stdin.fileno(),
538
 
                                     gobject.IO_IN,
539
 
                                     self.process_input))
 
623
        self._input_callback_tag = (
 
624
            GLib.io_add_watch(
 
625
                GLib.IOChannel.unix_new(sys.stdin.fileno()),
 
626
                GLib.PRIORITY_DEFAULT, GLib.IO_IN,
 
627
                glib_safely(self.process_input)))
540
628
        self.main_loop.run()
541
629
        # Main loop has finished, we should close everything now
542
 
        gobject.source_remove(self._input_callback_tag)
543
 
        self.screen.stop()
544
 
    
 
630
        GLib.source_remove(self._input_callback_tag)
 
631
        with warnings.catch_warnings():
 
632
            warnings.simplefilter("ignore", BytesWarning)
 
633
            self.screen.stop()
 
634
 
545
635
    def stop(self):
546
636
        self.main_loop.quit()
547
 
    
 
637
        log.removeHandler(self.loghandler)
 
638
        log.propagate = self.orig_log_propagate
 
639
 
548
640
    def process_input(self, source, condition):
549
641
        keys = self.screen.get_input()
550
 
        translations = { u"ctrl n": u"down",      # Emacs
551
 
                         u"ctrl p": u"up",        # Emacs
552
 
                         u"ctrl v": u"page down", # Emacs
553
 
                         u"meta v": u"page up",   # Emacs
554
 
                         u" ": u"page down",      # less
555
 
                         u"f": u"page down",      # less
556
 
                         u"b": u"page up",        # less
557
 
                         u"j": u"down",           # vi
558
 
                         u"k": u"up",             # vi
559
 
                         }
 
642
        translations = {"ctrl n": "down",       # Emacs
 
643
                        "ctrl p": "up",         # Emacs
 
644
                        "ctrl v": "page down",  # Emacs
 
645
                        "meta v": "page up",    # Emacs
 
646
                        " ": "page down",       # less
 
647
                        "f": "page down",       # less
 
648
                        "b": "page up",         # less
 
649
                        "j": "down",            # vi
 
650
                        "k": "up",              # vi
 
651
                        }
560
652
        for key in keys:
561
653
            try:
562
654
                key = translations[key]
563
655
            except KeyError:    # :-)
564
656
                pass
565
 
            
566
 
            if key == u"q" or key == u"Q":
 
657
 
 
658
            if key == "q" or key == "Q":
567
659
                self.stop()
568
660
                break
569
 
            elif key == u"window resize":
 
661
            elif key == "window resize":
570
662
                self.size = self.screen.get_cols_rows()
571
663
                self.refresh()
572
 
            elif key == u"\f":  # Ctrl-L
 
664
            elif key == "ctrl l":
 
665
                self.screen.clear()
573
666
                self.refresh()
574
 
            elif key == u"l" or key == u"D":
 
667
            elif key == "l" or key == "D":
575
668
                self.toggle_log_display()
576
669
                self.refresh()
577
 
            elif key == u"w" or key == u"i":
 
670
            elif key == "w" or key == "i":
578
671
                self.change_log_display()
579
672
                self.refresh()
580
 
            elif key == u"?" or key == u"f1" or key == u"esc":
 
673
            elif key == "?" or key == "f1" or key == "esc":
581
674
                if not self.log_visible:
582
675
                    self.log_visible = True
583
676
                    self.rebuild()
584
 
                self.log_message_raw((u"bold",
585
 
                                      u"  ".
586
 
                                      join((u"q: Quit",
587
 
                                            u"?: Help",
588
 
                                            u"l: Log window toggle",
589
 
                                            u"TAB: Switch window",
590
 
                                            u"w: Wrap (log)"))))
591
 
                self.log_message_raw((u"bold",
592
 
                                      u"  "
593
 
                                      .join((u"Clients:",
594
 
                                             u"e: Enable",
595
 
                                             u"d: Disable",
596
 
                                             u"r: Remove",
597
 
                                             u"s: Start new checker",
598
 
                                             u"S: Stop checker",
599
 
                                             u"C: Checker OK"))))
 
677
                self.add_log_line(("bold",
 
678
                                   "  ".join(("q: Quit",
 
679
                                              "?: Help",
 
680
                                              "l: Log window toggle",
 
681
                                              "TAB: Switch window",
 
682
                                              "w: Wrap (log lines)",
 
683
                                              "v: Toggle verbose log",
 
684
                                   ))))
 
685
                self.add_log_line(("bold",
 
686
                                   "  ".join(("Clients:",
 
687
                                              "+: Enable",
 
688
                                              "-: Disable",
 
689
                                              "R: Remove",
 
690
                                              "s: Start new checker",
 
691
                                              "S: Stop checker",
 
692
                                              "C: Checker OK",
 
693
                                              "a: Approve",
 
694
                                              "d: Deny",
 
695
                                   ))))
600
696
                self.refresh()
601
 
            elif key == u"tab":
 
697
            elif key == "tab":
602
698
                if self.topwidget.get_focus() is self.logbox:
603
699
                    self.topwidget.set_focus(0)
604
700
                else:
605
701
                    self.topwidget.set_focus(self.logbox)
606
702
                self.refresh()
607
 
            #elif (key == u"end" or key == u"meta >" or key == u"G"
608
 
            #      or key == u">"):
609
 
            #    pass            # xxx end-of-buffer
610
 
            #elif (key == u"home" or key == u"meta <" or key == u"g"
611
 
            #      or key == u"<"):
612
 
            #    pass            # xxx beginning-of-buffer
613
 
            #elif key == u"ctrl e" or key == u"$":
614
 
            #    pass            # xxx move-end-of-line
615
 
            #elif key == u"ctrl a" or key == u"^":
616
 
            #    pass            # xxx move-beginning-of-line
617
 
            #elif key == u"ctrl b" or key == u"meta (" or key == u"h":
618
 
            #    pass            # xxx left
619
 
            #elif key == u"ctrl f" or key == u"meta )" or key == u"l":
620
 
            #    pass            # xxx right
621
 
            #elif key == u"a":
622
 
            #    pass            # scroll up log
623
 
            #elif key == u"z":
624
 
            #    pass            # scroll down log
 
703
            elif key == "v":
 
704
                if log.level < logging.INFO:
 
705
                    log.setLevel(logging.INFO)
 
706
                    log.info("Verbose mode: Off")
 
707
                else:
 
708
                    log.setLevel(logging.NOTSET)
 
709
                    log.info("Verbose mode: On")
 
710
            # elif (key == "end" or key == "meta >" or key == "G"
 
711
            #       or key == ">"):
 
712
            #     pass            # xxx end-of-buffer
 
713
            # elif (key == "home" or key == "meta <" or key == "g"
 
714
            #       or key == "<"):
 
715
            #     pass            # xxx beginning-of-buffer
 
716
            # elif key == "ctrl e" or key == "$":
 
717
            #     pass            # xxx move-end-of-line
 
718
            # elif key == "ctrl a" or key == "^":
 
719
            #     pass            # xxx move-beginning-of-line
 
720
            # elif key == "ctrl b" or key == "meta (" or key == "h":
 
721
            #     pass            # xxx left
 
722
            # elif key == "ctrl f" or key == "meta )" or key == "l":
 
723
            #     pass            # xxx right
 
724
            # elif key == "a":
 
725
            #     pass            # scroll up log
 
726
            # elif key == "z":
 
727
            #     pass            # scroll down log
625
728
            elif self.topwidget.selectable():
626
729
                self.topwidget.keypress(self.size, key)
627
730
                self.refresh()
628
731
        return True
629
732
 
 
733
 
 
734
class UILogHandler(logging.Handler):
 
735
    def __init__(self, ui, *args, **kwargs):
 
736
        self.ui = ui
 
737
        super(UILogHandler, self).__init__(*args, **kwargs)
 
738
        self.setFormatter(
 
739
            logging.Formatter("%(asctime)s: %(message)s"))
 
740
    def emit(self, record):
 
741
        msg = self.format(record)
 
742
        if record.levelno > logging.INFO:
 
743
            msg = ("bold", msg)
 
744
        self.ui.add_log_line(msg)
 
745
 
 
746
 
630
747
ui = UserInterface()
631
748
try:
632
749
    ui.run()
633
 
except Exception, e:
634
 
    ui.log_message(unicode(e))
635
 
    ui.screen.stop()
 
750
except KeyboardInterrupt:
 
751
    with warnings.catch_warnings():
 
752
        warnings.filterwarnings("ignore", "", BytesWarning)
 
753
        ui.screen.stop()
 
754
except Exception:
 
755
    with warnings.catch_warnings():
 
756
        warnings.filterwarnings("ignore", "", BytesWarning)
 
757
        ui.screen.stop()
636
758
    raise