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# Copyright (C) 2007-2008, One Laptop Per Child
#
# 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
import logging
import gobject
import dbus
from sugar import profile
HAL_SERVICE_NAME = 'org.freedesktop.Hal'
HAL_MANAGER_PATH = '/org/freedesktop/Hal/Manager'
HAL_MANAGER_IFACE = 'org.freedesktop.Hal.Manager'
HAL_DEVICE_IFACE = 'org.freedesktop.Hal.Device'
HAL_VOLUME_IFACE = 'org.freedesktop.Hal.Device.Volume'
MOUNT_OPTION_UID = 500
MOUNT_OPTION_UMASK = 000
_volumes_manager = None
class VolumesManager(gobject.GObject):
__gtype_name__ = 'VolumesManager'
__gsignals__ = {
'volume-added': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([object])),
'volume-removed': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([object]))
}
def __init__(self):
gobject.GObject.__init__(self)
self._volumes = {}
bus = dbus.SystemBus()
proxy = bus.get_object(HAL_SERVICE_NAME, HAL_MANAGER_PATH)
self._hal_manager = dbus.Interface(proxy, HAL_MANAGER_IFACE)
self._hal_manager.connect_to_signal('DeviceAdded',
self._hal_device_added_cb)
for udi in self._hal_manager.FindDeviceByCapability('volume'):
if self._is_device_relevant(udi):
try:
self._add_hal_device(udi)
except Exception, e:
logging.error('Exception when mounting device %r: %r' % \
(udi, e))
def get_volumes(self):
return self._volumes.values()
def _hal_device_added_cb(self, udi):
bus = dbus.SystemBus()
device_object = bus.get_object(HAL_SERVICE_NAME, udi)
device = dbus.Interface(device_object, HAL_DEVICE_IFACE)
if device.QueryCapability('volume'):
logging.debug('VolumesManager._hal_device_added_cb: %r', udi)
if self._is_device_relevant(udi):
self._add_hal_device(udi)
def _is_device_relevant(self, udi):
bus = dbus.SystemBus()
device_object = bus.get_object(HAL_SERVICE_NAME, udi)
device = dbus.Interface(device_object, HAL_DEVICE_IFACE)
# Ignore volumes without a filesystem.
if device.GetProperty('volume.fsusage') != 'filesystem':
return False
# Ignore root.
if device.GetProperty('volume.mount_point') == '/':
return False
storage_udi = device.GetProperty('block.storage_device')
obj = bus.get_object(HAL_SERVICE_NAME, storage_udi)
storage_device = dbus.Interface(obj, HAL_DEVICE_IFACE)
# Ignore non-removable storage.
if not storage_device.GetProperty('storage.hotpluggable'):
return False
return True
def _add_hal_device(self, udi):
logging.debug('VolumeToolbar._add_hal_device: %r' % udi)
bus = dbus.SystemBus()
device_object = bus.get_object(HAL_SERVICE_NAME, udi)
device = dbus.Interface(device_object, HAL_DEVICE_IFACE)
# listen to mount/unmount
device.connect_to_signal('PropertyModified',
lambda *args: self._hal_device_property_modified_cb(udi, *args))
bus.add_signal_receiver(self._hal_device_removed_cb,
'DeviceRemoved',
HAL_MANAGER_IFACE, HAL_SERVICE_NAME,
HAL_MANAGER_PATH, arg0=udi)
if device.GetProperty('volume.is_mounted'):
self._add_volume(udi)
return
label = device.GetProperty('volume.label')
fs_type = device.GetProperty('volume.fstype')
valid_options = device.GetProperty('volume.mount.valid_options')
options = []
if 'uid=' in valid_options:
options.append('uid=%i' % MOUNT_OPTION_UID)
if 'umask=' in valid_options:
options.append('umask=%i' % MOUNT_OPTION_UMASK)
if 'noatime' in valid_options:
options.append('noatime')
if 'utf8' in valid_options:
options.append('utf8')
if 'iocharset=' in valid_options:
options.append('iocharset=utf8')
mount_point = label
if not mount_point:
mount_point = device.GetProperty('volume.uuid')
volume = dbus.Interface(device_object, HAL_VOLUME_IFACE)
# Try 100 times to get a mount point
mounted = False
i = 0
while not mounted:
try:
if i > 0:
volume.Mount('%s_%d' % (mount_point, i), fs_type, options)
else:
volume.Mount(mount_point, fs_type, options)
mounted = True
except dbus.DBusException, e:
s = 'org.freedesktop.Hal.Device.Volume.MountPointNotAvailable'
if i < 100 and e.get_dbus_name() == s:
i += 1
else:
raise
def _hal_device_property_modified_cb(self, udi, count, changes):
if 'volume.is_mounted' in [change[0] for change in changes]:
logging.debug('VolumesManager._hal_device_property_modified: %r' % \
(udi))
bus = dbus.SystemBus()
#proxy = bus.get_object(HAL_SERVICE_NAME, HAL_MANAGER_PATH)
#hal_manager = dbus.Interface(proxy, HAL_MANAGER_IFACE)
# TODO: Why this doesn't work?
#if not hal_manager.DeviceExists(udi):
# return
proxy = bus.get_object(HAL_SERVICE_NAME, udi)
device = dbus.Interface(proxy, HAL_DEVICE_IFACE)
try:
is_mounted = device.GetProperty('volume.is_mounted')
except dbus.DBusException, e:
logging.debug('e: %s' % e)
return
if is_mounted:
if udi not in self._volumes:
self._add_volume(udi)
else:
if udi in self._volumes:
self._remove_volume(udi)
def _add_volume(self, udi):
bus = dbus.SystemBus()
device_object = bus.get_object(HAL_SERVICE_NAME, udi)
device = dbus.Interface(device_object, HAL_DEVICE_IFACE)
volume_name = device.GetProperty('volume.label')
if not volume_name:
volume_name = device.GetProperty('volume.uuid')
volume = Volume(volume_name,
self._get_icon_for_volume(device),
profile.get_color(),
udi)
self._volumes[udi] = volume
logging.debug('mounted volume %s' % udi)
self.emit('volume-added', volume)
def _remove_volume(self, udi):
volume = self._volumes[udi]
del self._volumes[udi]
self.emit('volume-removed', volume)
def _hal_device_removed_cb(self, udi):
logging.debug('VolumesManager._hal_device_removed_cb: %r', udi)
if udi in self._volumes:
self._remove_volume(udi)
def _get_icon_for_volume(self, device):
bus = dbus.SystemBus()
storage_udi = device.GetProperty('block.storage_device')
obj = bus.get_object(HAL_SERVICE_NAME, storage_udi)
storage_device = dbus.Interface(obj, HAL_DEVICE_IFACE)
storage_drive_type = storage_device.GetProperty('storage.drive_type')
if storage_drive_type == 'sd_mmc':
return 'media-flash-sd-mmc'
else:
return 'media-flash-usb'
class Volume(object):
def __init__(self, name, icon_name, icon_color, udi):
self.name = name
self.icon_name = icon_name
self.icon_color = icon_color
self.udi = udi
def unmount(self):
logging.debug('Volumes.unmount: %r', self.udi)
bus = dbus.SystemBus()
device_object = bus.get_object(HAL_SERVICE_NAME, self.udi)
volume = dbus.Interface(device_object, HAL_VOLUME_IFACE)
volume.Unmount([])
def get_volumes_manager():
global _volumes_manager
if _volumes_manager is None:
_volumes_manager = VolumesManager()
return _volumes_manager
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