263 lines
10 KiB
Python
263 lines
10 KiB
Python
#!/usr/bin/python2
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#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2012 Agnieszka Kostrzewa <agnieszka.kostrzewa@gmail.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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#
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import re
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import sys
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import os
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from PyQt4.QtCore import *
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from PyQt4.QtGui import *
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import subprocess
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import time
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from qubes.qubes import QubesException
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from thread_monitor import *
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from datetime import datetime
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from string import replace
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path_re = re.compile(r"[a-zA-Z0-9/:.,_+=() -]*")
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path_max_len = 512
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mount_for_backup_path = '/usr/libexec/qubes-manager/mount_for_backup.sh'
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def check_if_mounted(dev_path):
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mounts_file = open("/proc/mounts")
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for m in list(mounts_file):
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if m.startswith(dev_path):
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return m.split(" ")[1]
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return None
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def mount_device(dev_path):
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try:
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mount_dir_name = "backup" + replace(str(datetime.now()),' ', '-').split(".")[0]
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pmount_cmd = [mount_for_backup_path, dev_path, mount_dir_name]
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res = subprocess.check_call(pmount_cmd)
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except Exception as ex:
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QMessageBox.warning (None, "Error mounting selected device!", "<b>Could not mount {0}.</b><br><br>ERROR: {1}".format(dev_path, ex))
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return None
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if res == 0:
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dev_mount_path = "/media/"+mount_dir_name
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return dev_mount_path
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return None
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def umount_device(dev_mount_path):
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while True:
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try:
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pumount_cmd = ["/usr/bin/sudo", "/usr/bin/pumount", "--luks-force", dev_mount_path]
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res = subprocess.check_call(pumount_cmd)
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if res == 0:
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dev_mount_path = None
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return dev_mount_path
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except Exception as ex:
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title = "Error unmounting backup device!"
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text = "<b>Could not unmount {0}.</b><br>\
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<b>Please retry or unmount it manually using</b><br> pumount {0}.<br><br>\
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ERROR: {1}".format(dev_mount_path, ex)
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button = QMessageBox.warning (None, title, text, QMessageBox.Ok | QMessageBox.Retry, QMessageBox.Retry)
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if button == QMessageBox.Ok:
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return dev_mount_path
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def detach_device(dialog, dev_name):
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""" Detach device from dom0, if device was attached from some VM"""
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if not dev_name.startswith(dialog.vm.name+":"):
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with dialog.blk_manager.blk_lock:
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dialog.blk_manager.detach_device(dialog.vm, dev_name)
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dialog.blk_manager.update()
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else:
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# umount/LUKS remove do not trigger udev event on underlying device,
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# so trigger it manually - to publish back as available device
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subprocess.call(["/usr/bin/sudo", "/bin/udevadm", "trigger", "--action=change",
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"--subsystem-match=block",
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"--sysname-match=%s" % dev_name.split(":")[1]])
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with dialog.blk_manager.blk_lock:
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dialog.blk_manager.update()
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def fill_appvms_list(dialog):
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dialog.appvm_combobox.clear()
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dialog.appvm_combobox.addItem("dom0")
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dialog.appvm_combobox.setCurrentIndex(0) #current selected is null ""
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for vm in dialog.qvm_collection.values():
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if vm.is_appvm() and vm.internal:
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continue
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if vm.is_template() and vm.installed_by_rpm:
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continue
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if vm.is_running() and vm.qid != 0:
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dialog.appvm_combobox.addItem(vm.name)
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def fill_devs_list(dialog):
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dialog.dev_combobox.clear()
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dialog.dev_combobox.addItem("None")
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dialog.blk_manager.blk_lock.acquire()
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for a in dialog.blk_manager.attached_devs:
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if dialog.blk_manager.attached_devs[a]['attached_to']['vm'] == dialog.vm.name :
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att = a + " " + unicode(dialog.blk_manager.attached_devs[a]['size']) + " " + dialog.blk_manager.attached_devs[a]['desc']
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dialog.dev_combobox.addItem(att, QVariant(a))
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for a in dialog.blk_manager.free_devs:
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att = a + " " + unicode(dialog.blk_manager.free_devs[a]['size']) + " " + dialog.blk_manager.free_devs[a]['desc']
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dialog.dev_combobox.addItem(att, QVariant(a))
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dialog.blk_manager.blk_lock.release()
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dialog.dev_combobox.setCurrentIndex(0) #current selected is null ""
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dialog.prev_dev_idx = 0
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dialog.dir_line_edit.clear()
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enable_dir_line_edit(dialog, True)
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def enable_dir_line_edit(dialog, boolean):
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dialog.dir_line_edit.setEnabled(boolean)
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dialog.select_path_button.setEnabled(boolean)
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def update_device_appvm_enabled(dialog, idx):
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# Only one of those can be used
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dialog.dev_combobox.setEnabled(dialog.appvm_combobox.currentIndex() == 0)
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dialog.appvm_combobox.setEnabled(dialog.dev_combobox.currentIndex() == 0)
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def dev_combobox_activated(dialog, idx):
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if idx == dialog.prev_dev_idx: #nothing has changed
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return
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#there was a change
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dialog.dir_line_edit.setText("")
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# umount old device if any
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if dialog.dev_mount_path != None:
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dialog.dev_mount_path = umount_device(dialog.dev_mount_path)
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if dialog.dev_mount_path != None:
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dialog.dev_combobox.setCurrentIndex(dialog.prev_dev_idx)
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return
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else:
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detach_device(dialog,
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str(dialog.dev_combobox.itemData(dialog.prev_dev_idx).toString()))
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# then attach new one
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if dialog.dev_combobox.currentIndex() != 0: #An existing device chosen
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dev_name = str(dialog.dev_combobox.itemData(idx).toString())
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if dev_name.startswith(dialog.vm.name+":"):
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# originally attached to dom0
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dev_path = "/dev/"+dev_name.split(":")[1]
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else:
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try:
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with dialog.blk_manager.blk_lock:
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if dev_name in dialog.blk_manager.free_devs:
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#attach it to dom0, then treat it as an attached device
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dialog.blk_manager.attach_device(dialog.vm, dev_name)
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dialog.blk_manager.update()
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if dev_name in dialog.blk_manager.attached_devs: #is attached to dom0
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assert dialog.blk_manager.attached_devs[dev_name]['attached_to']['vm'] == dialog.vm.name
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dev_path = "/dev/" + dialog.blk_manager.attached_devs[dev_name]['attached_to']['frontend']
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else:
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raise QubesException("device not attached?!")
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except QubesException as ex:
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QMessageBox.warning (None, "Error attaching selected device!",
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"<b>Could not attach {0}.</b><br><br>ERROR: {1}".format(dev_name, ex))
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dialog.dev_combobox.setCurrentIndex(0) #if couldn't mount - set current device to "None"
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dialog.prev_dev_idx = 0
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return
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#check if device mounted
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dialog.dev_mount_path = check_if_mounted(dev_path)
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if dialog.dev_mount_path == None:
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dialog.dev_mount_path = mount_device(dev_path)
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if dialog.dev_mount_path == None:
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dialog.dev_combobox.setCurrentIndex(0) #if couldn't mount - set current device to "None"
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dialog.prev_dev_idx = 0
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detach_device(dialog,
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str(dialog.dev_combobox.itemData(idx).toString()))
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return
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dialog.prev_dev_idx = idx
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if hasattr(dialog, 'selected_vms'):
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# backup window
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if dialog.dev_mount_path != None:
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# Initialize path with root of mounted device
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dialog.dir_line_edit.setText(dialog.dev_mount_path)
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dialog.select_dir_page.emit(SIGNAL("completeChanged()"))
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def get_path_for_vm(vm, service_name):
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if not vm:
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return None
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proc = vm.run("QUBESRPC %s dom0" % service_name, passio_popen=True)
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proc.stdin.close()
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untrusted_path = proc.stdout.readline(path_max_len)
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if len(untrusted_path) == 0:
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return None
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if path_re.match(untrusted_path):
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assert '../' not in untrusted_path
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assert '\0' not in untrusted_path
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return untrusted_path.strip()
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else:
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return None
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def select_path_button_clicked(dialog, select_file = False):
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backup_location = str(dialog.dir_line_edit.text())
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file_dialog = QFileDialog()
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file_dialog.setReadOnly(True)
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if select_file:
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file_dialog_function = file_dialog.getOpenFileName
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else:
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file_dialog_function = file_dialog.getExistingDirectory
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new_appvm = None
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new_path = None
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if dialog.appvm_combobox.currentIndex() != 0: #An existing appvm chosen
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new_appvm = str(dialog.appvm_combobox.currentText())
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vm = dialog.qvm_collection.get_vm_by_name(new_appvm)
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if vm:
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new_path = get_path_for_vm(vm, "qubes.SelectFile" if select_file
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else "qubes.SelectDirectory")
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elif dialog.dev_mount_path != None:
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new_path = file_dialog_function(dialog, "Select backup location.", dialog.dev_mount_path)
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else:
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new_path = file_dialog_function(dialog, "Select backup location.",
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backup_location if backup_location
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else '/')
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if new_path != None:
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new_path = unicode(new_path)
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if os.path.basename(new_path) == 'qubes.xml':
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backup_location = os.path.dirname(new_path)
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else:
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backup_location = new_path
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dialog.dir_line_edit.setText(backup_location)
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if (new_path or new_appvm) and len(backup_location) > 0:
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dialog.select_dir_page.emit(SIGNAL("completeChanged()"))
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def simulate_long_lasting_proces(period, progress_callback):
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for i in range(period):
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progress_callback((i*100)/period)
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time.sleep(1)
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progress_callback(100)
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return 0
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