1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
# Miro - an RSS based video player application
# Copyright (C) 2010, 2011
# Participatory Culture Foundation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# In addition, as a special exception, the copyright holders give
# permission to link the code of portions of this program with the OpenSSL
# library.
#
# You must obey the GNU General Public License in all respects for all of
# the code used other than OpenSSL. If you modify file(s) with this
# exception, you may extend this exception to your version of the file(s),
# but you are not obligated to do so. If you do not wish to do so, delete
# this exception statement from your version. If you delete this exception
# statement from all source files in the program, then also delete it here.
import logging
import os
import gio
from glib import GError
from miro import app
from miro import messages
def log_drive(drive, when):
logging.debug('drive %s: %s (%s)' % (when, drive,
drive.get_identifier('unix-device')))
def log_volume(volume, when):
logging.debug('volume %s: %s (unix: %s, drive: %s, mount: %s)' % (
when, volume, volume.get_identifier('unix-device'),
volume.get_drive(), volume.get_mount()))
def log_mount(mount, when):
logging.debug('mount %s: %s (root: %s, volume: %s, drive: %s)' % (
when, mount, mount.get_root().get_path(), mount.get_volume(),
mount.get_drive()))
class DeviceTracker(object):
def __init__(self):
self._unix_device_to_drive = {}
self._drive_has_volumes = {}
def start_tracking(self):
volume_monitor = gio.volume_monitor_get()
volume_monitor.connect('drive-connected', self._drive_connected)
volume_monitor.connect('drive-changed',
lambda x, y: log_drive(y, 'changed'))
volume_monitor.connect('volume-added', self._volume_added)
volume_monitor.connect('volume-changed', self._volume_changed)
volume_monitor.connect('mount-added', self._mount_added)
volume_monitor.connect('mount-removed',
lambda x, y: log_mount(y, 'removed'))
volume_monitor.connect('volume-removed', self._volume_removed)
volume_monitor.connect('drive-disconnected', self._drive_disconnected)
for drive in volume_monitor.get_connected_drives():
self._drive_connected(volume_monitor, drive)
volumes = drive.get_volumes()
if volumes:
for volume in volumes:
self._volume_added(volume_monitor, volume)
@staticmethod
def _should_ignore_drive(drive):
"""
Returns True if we should ignore everything about the given drive.
"""
return drive is None or drive.get_name() == 'CD/DVD Drive'
def _get_volume_info(self, volume):
id_ = volume.get_identifier('unix-device')
mount = size = remaining = None
mount = volume.get_mount()
if mount:
mount = mount.get_root().get_path()
if mount and os.path.exists(mount):
if mount[-1] != os.path.sep:
mount = mount + os.path.sep # make sure it ends with a /
statinfo = os.statvfs(mount)
size = statinfo.f_frsize * statinfo.f_blocks
remaining = statinfo.f_frsize * statinfo.f_bavail
return id_, {
'name': volume.get_drive().get_name(),
'visible_name': volume.get_name(),
'mount': mount,
'size': size,
'remaining': remaining
}
def _drive_connected(self, volume_monitor, drive):
log_drive(drive, 'connected')
if self._should_ignore_drive(drive):
return
logging.debug('seen device: %r', drive.get_name())
id_ = drive.get_identifier('unix-device')
volumes = drive.get_volumes()
if volumes:
# so we ignore the disconnected event, instead deferring to the
# volume events
self._drive_has_volumes.setdefault(id_, 0)
else:
self._unix_device_to_drive[id_] = drive
app.device_manager.device_connected(id_, name=drive.get_name())
def _drive_disconnected(self, volume_monitor, drive):
log_drive(drive, 'disconnected')
if self._should_ignore_drive(drive):
return
id_ = drive.get_identifier('unix-device')
if self._drive_has_volumes.get(id_):
# don't send an event; the volumes will do that
del self._drive_has_volumes[id_]
else:
del self._unix_device_to_drive[id_]
app.device_manager.device_disconnected(id_)
def _volume_added(self, volume_monitor, volume):
log_volume(volume, 'added')
id_, info = self._get_volume_info(volume)
# have to set this so that we can access it when the volume is removed
self._unix_device_to_drive[id_] = volume.get_drive()
if volume is None or self._should_ignore_drive(volume.get_drive()):
return
drive_id = volume.get_drive().get_identifier('unix-device')
if drive_id != id_ and drive_id in self._unix_device_to_drive:
# we sent a "connect message" for the drive; disconnect the extra
# device before we connect the volume (#17891)
del self._unix_device_to_drive[drive_id]
app.device_manager.device_disconnected(drive_id)
app.device_manager.device_connected(id_, **info)
self._drive_has_volumes.setdefault(drive_id, 0)
self._drive_has_volumes[drive_id] += 1
def _volume_changed(self, volume_monitor, volume):
log_volume(volume, 'changed')
if volume is None or self._should_ignore_drive(volume.get_drive()):
return
try:
id_, info = self._get_volume_info(volume)
except AttributeError:
# comes up when the device is rudely removed
return
else:
app.device_manager.device_changed(id_, **info)
def _mount_added(self, volume_monitor, mount):
log_mount(mount, 'added')
if mount.get_volume():
self._volume_changed(volume_monitor, mount.get_volume())
def _volume_removed(self, volume_monitor, volume):
log_volume(volume, 'removed')
if volume is None:
return
drive = volume.get_drive()
if drive and self._should_ignore_drive(drive):
return
id_ = volume.get_identifier('unix-device')
del self._unix_device_to_drive[id_]
app.device_manager.device_disconnected(id_)
if drive is None: # can be None on force-disconnect
return
drive_id = drive .get_identifier('unix-device')
self._drive_has_volumes[drive_id] -= 1
if self._drive_has_volumes[drive_id] == 0:
# re-add the bare device
del self._drive_has_volumes[drive_id]
self._drive_connected(volume_monitor, volume.get_drive())
def eject(self, device):
if device.id not in self._unix_device_to_drive:
return
drive = self._unix_device_to_drive[device.id]
drive.eject(self._eject_callback,
gio.MOUNT_UNMOUNT_NONE, None, device)
def _eject_callback(self, drive, result, device):
try:
result = drive.eject_finish(result)
except (gio.Error, GError):
# XXX notify the user in some way?
logging.exception('eject failed for %r' % drive)
result = False
if not result:
messages.DeviceEjectFailed(device).send_to_frontend()
|
