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udisks.py
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#!/usr/bin/env python3
# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
# Name: udisks.py
# Purpose: Module to mount unmount and eject using dbus and udisk
# Authors: Original author is Kovid Goyal <[email protected]> and python3
# supporte by Sundar for multibootusb project
# Licence: 'GPL v3' as per original Licence
__license__ = 'GPL v3'
__copyright__ = '2010, Kovid Goyal <[email protected]>'
__docformat__ = 'restructuredtext en'
# from __future__ import print_function
import os
import re
def de_mangle_mountpoint(raw):
return raw.replace('\\040', ' ').replace('\\011', '\t') \
.replace('\\012', '\n').replace('\\0134', '\\')
def node_mountpoint(node):
for line in open('/proc/mounts').readlines():
line = line.split()
if line[0] == node:
return de_mangle_mountpoint(line[1])
return None
def find_mounted_partitions_on(disk):
assert not disk[-1:].isdigit()
with open('/proc/mounts') as f:
relevant_lines = [l.split(' ') for l in f.readlines()
if l.startswith(disk)]
return [ [v[0], de_mangle_mountpoint(v[1])] + v[2:] for v
in relevant_lines ]
class NoUDisks1(Exception):
pass
class UDisks(object):
def __init__(self):
import dbus
self.bus = dbus.SystemBus()
try:
self.main = dbus.Interface(self.bus.get_object('org.freedesktop.UDisks',
'/org/freedesktop/UDisks'), 'org.freedesktop.UDisks')
except dbus.exceptions.DBusException as e:
if getattr(e, '_dbus_error_name', None) == 'org.freedesktop.DBus.Error.ServiceUnknown':
raise NoUDisks1()
raise
def device(self, device_node_path):
import dbus
devpath = self.main.FindDeviceByDeviceFile(device_node_path)
return dbus.Interface(self.bus.get_object('org.freedesktop.UDisks',
devpath), 'org.freedesktop.UDisks.Device')
def mount(self, device_node_path, remounted=None):
mp = node_mountpoint(str(device_node_path))
if mp:
return mp
d = self.device(device_node_path)
r = str(d.FilesystemMount(
'', ['auth_no_user_interaction', 'rw', 'noexec', 'nosuid',
'nodev', 'uid=%d'%os.geteuid(), 'gid=%d'%os.getegid()]))
if remounted is not None:
remounted.append(True)
return r
def unmount(self, device_node_path):
d = self.device(device_node_path)
d.FilesystemUnmount(['force'])
def eject(self, device_node_path):
parent = device_node_path.rstrip('0123456789')
d = self.device(parent)
d.DriveEject([])
class NoUDisks2(Exception):
pass
class UDisks2(object):
BLOCK = 'org.freedesktop.UDisks2.Block'
FILESYSTEM = 'org.freedesktop.UDisks2.Filesystem'
DRIVE = 'org.freedesktop.UDisks2.Drive'
def __init__(self):
import dbus
self.bus = dbus.SystemBus()
try:
self.bus.get_object('org.freedesktop.UDisks2',
'/org/freedesktop/UDisks2')
except dbus.exceptions.DBusException as e:
if getattr(e, '_dbus_error_name', None) == 'org.freedesktop.DBus.Error.ServiceUnknown':
raise NoUDisks2()
raise
def device(self, device_node_path):
device_node_path = os.path.realpath(device_node_path)
devname = device_node_path.split('/')[-1]
# First we try a direct object path
bd = self.bus.get_object('org.freedesktop.UDisks2',
'/org/freedesktop/UDisks2/block_devices/%s'%devname)
try:
device = bd.Get(self.BLOCK, 'Device',
dbus_interface='org.freedesktop.DBus.Properties')
device = bytearray(device).replace(b'\x00', b'').decode('utf-8')
except:
device = None
if device == device_node_path:
return bd
# Enumerate all devices known to UDisks
devs = self.bus.get_object('org.freedesktop.UDisks2',
'/org/freedesktop/UDisks2/block_devices')
xml = devs.Introspect(dbus_interface='org.freedesktop.DBus.Introspectable')
for dev in re.finditer(r'name=[\'"](.+?)[\'"]', type('')(xml)):
bd = self.bus.get_object('org.freedesktop.UDisks2',
'/org/freedesktop/UDisks2/block_devices/%s2'%dev.group(1))
try:
device = bd.Get(self.BLOCK, 'Device',
dbus_interface='org.freedesktop.DBus.Properties')
device = bytearray(device).replace(b'\x00', b'').decode('utf-8')
except:
device = None
if device == device_node_path:
return bd
raise ValueError('%r not known to UDisks2'%device_node_path)
def mount(self, device_node_path, remounted=None):
mp = node_mountpoint(str(device_node_path))
if mp:
return mp
d = self.device(device_node_path)
mount_options = ['rw', 'noexec', 'nosuid', 'nodev']
mp = str(d.Mount(
{
'auth.no_user_interaction':True,
'options':','.join(mount_options)
},
dbus_interface=self.FILESYSTEM))
if remounted is not None:
remounted.append(True)
return mp
def unmount(self, device_node_path):
d = self.device(device_node_path)
d.Unmount({'force':True, 'auth.no_user_interaction':True},
dbus_interface=self.FILESYSTEM)
def drive_for_device(self, device):
drive = device.Get(self.BLOCK, 'Drive',
dbus_interface='org.freedesktop.DBus.Properties')
return self.bus.get_object('org.freedesktop.UDisks2', drive)
def eject(self, device_node_path):
drive = self.drive_for_device(self.device(device_node_path))
drive.Eject({'auth.no_user_interaction':True},
dbus_interface=self.DRIVE)
def get_udisks(ver=None):
if ver is None:
try:
u = UDisks2()
except NoUDisks2:
u = UDisks()
return u
return UDisks2() if ver == 2 else UDisks()
def get_udisks1():
u = None
try:
u = UDisks()
except NoUDisks1:
try:
u = UDisks2()
except NoUDisks2:
pass
if u is None:
raise EnvironmentError('UDisks not available on your system')
return u
def mount(node_path):
u = get_udisks1()
u.mount(node_path)
def eject(node_path):
u = get_udisks1()
u.eject(node_path)
def umount(node_path):
u = get_udisks1()
u.unmount(node_path)
def test_udisks(ver=None):
import sys
dev = sys.argv[1]
print('Testing with node', dev)
u = get_udisks(ver=ver)
print('Using Udisks:', u.__class__.__name__)
print('Mounted at:', u.mount(dev))
print('Unmounting')
u.unmount(dev)
print('Mounting')
u.mount(dev)
print('Ejecting:')
u.eject(dev)
if __name__ == '__main__':
print('Run test here...')
# test_udisks()