340 lines
12 KiB
Python
340 lines
12 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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# Copyright (C) 2012 Marek Marczykowski <marmarek@mimuw.edu.pl>
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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 Lesser General Public License along
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# with this program; if not, see <http://www.gnu.org/licenses/>.
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#
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#
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import sys
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import shutil
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from PyQt4 import QtCore # pylint: disable=import-error
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from PyQt4 import QtGui # pylint: disable=import-error
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import threading
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import time
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import os
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import os.path
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import traceback
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import signal
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from qubes import backup
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from . import ui_restoredlg # pylint: disable=no-name-in-module
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from . import multiselectwidget
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from . import backup_utils
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from . import thread_monitor
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from multiprocessing import Queue, Event
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from multiprocessing.queues import Empty
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from qubesadmin import Qubes, exc
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from qubesadmin.backup import restore
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class RestoreVMsWindow(ui_restoredlg.Ui_Restore, QtGui.QWizard):
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def __init__(self, app, qvm_collection, parent=None):
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super(RestoreVMsWindow, self).__init__(parent)
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self.app = app
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self.qvm_collection = qvm_collection
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self.vms_to_restore = None
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self.func_output = []
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self.feedback_queue = Queue()
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self.canceled = False
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self.tmpdir_to_remove = None
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self.error_detected = Event()
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self.thread_monitor = None
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self.backup_restore = None
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self.target_appvm = None
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self.setupUi(self)
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self.select_vms_widget = multiselectwidget.MultiSelectWidget(self)
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self.select_vms_layout.insertWidget(1, self.select_vms_widget)
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self.connect(self,
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QtCore.SIGNAL("currentIdChanged(int)"),
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self.current_page_changed)
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self.dir_line_edit.connect(self.dir_line_edit,
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QtCore.SIGNAL("textChanged(QString)"),
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self.backup_location_changed)
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self.select_dir_page.isComplete = self.has_selected_dir
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self.select_vms_page.isComplete = self.has_selected_vms
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self.confirm_page.isComplete = self.all_vms_good
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# FIXME
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# this causes to run isComplete() twice, I don't know why
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self.select_vms_page.connect(
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self.select_vms_widget,
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QtCore.SIGNAL("selected_changed()"),
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QtCore.SIGNAL("completeChanged()"))
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backup_utils.fill_appvms_list(self)
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@QtCore.pyqtSlot(name='on_select_path_button_clicked')
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def select_path_button_clicked(self):
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backup_utils.select_path_button_clicked(self, True)
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def cleanupPage(self, p_int): # pylint: disable=invalid-name
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if self.page(p_int) is self.select_vms_page:
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self.vms_to_restore = None
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else:
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super(RestoreVMsWindow, self).cleanupPage(p_int)
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def __fill_vms_list__(self):
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if self.vms_to_restore is not None:
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return
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self.select_vms_widget.selected_list.clear()
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self.select_vms_widget.available_list.clear()
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self.target_appvm = None
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if self.appvm_combobox.currentIndex() != 0: # An existing appvm chosen
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self.target_appvm = self.qvm_collection.domains[
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str(self.appvm_combobox.currentText())]
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try:
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self.backup_restore = restore.BackupRestore(
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self.qvm_collection,
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self.dir_line_edit.text(),
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self.target_appvm,
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self.passphrase_line_edit.text()
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)
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if self.ignore_missing.isChecked():
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self.backup_restore.options.use_default_template = True
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self.backup_restore.options.use_default_netvm = True
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if self.ignore_uname_mismatch.isChecked():
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self.backup_restore.options.ignore_username_mismatch = True
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if self.verify_only.isChecked():
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self.backup_restore.options.verify_only = True
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self.vms_to_restore = self.backup_restore.get_restore_info()
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for vmname in self.vms_to_restore:
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if vmname.startswith('$'):
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# Internal info
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continue
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self.select_vms_widget.available_list.addItem(vmname)
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except exc.QubesException as ex:
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QtGui.QMessageBox.warning(None, self.tr("Restore error!"), str(ex))
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def append_output(self, text):
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self.commit_text_edit.append(text)
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def restore_error_output(self, text):
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self.error_detected.set()
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self.append_output(u'<font color="red">{0}</font>'.format(text))
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def restore_output(self, text):
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self.append_output(u'<font color="black">{0}</font>'.format(text))
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def __do_restore__(self, t_monitor):
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err_msg = []
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try:
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self.backup_restore.restore_do(self.vms_to_restore)
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except backup.BackupCanceledError as ex:
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self.canceled = True
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self.tmpdir_to_remove = ex.tmpdir
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err_msg.append(str(ex))
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except Exception as ex: # pylint: disable=broad-except
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err_msg.append(str(ex))
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err_msg.append(
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self.tr("Partially restored files left in /var/tmp/restore_*, "
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"investigate them and/or clean them up"))
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if self.canceled:
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self.append_output('<b><font color="red">{0}</font></b>'.format(
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self.tr("Restore aborted!")))
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elif err_msg or self.error_detected.is_set():
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if err_msg:
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t_monitor.set_error_msg('\n'.join(err_msg))
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self.append_output('<b><font color="red">{0}</font></b>'.format(
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self.tr("Finished with errors!")))
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else:
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self.append_output('<font color="green">{0}</font>'.format(
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self.tr("Finished successfully!")))
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t_monitor.set_finished()
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def current_page_changed(self, page_id): # pylint: disable=unused-argument
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old_sigchld_handler = signal.signal(signal.SIGCHLD, signal.SIG_DFL)
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if self.currentPage() is self.select_vms_page:
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self.__fill_vms_list__()
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elif self.currentPage() is self.confirm_page:
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self.vms_to_restore = self.backup_restore.get_restore_info()
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for i in range(self.select_vms_widget.available_list.count()):
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vmname = self.select_vms_widget.available_list.item(i).text()
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del self.vms_to_restore[str(vmname)]
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self.vms_to_restore = self.backup_restore.restore_info_verify(
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self.vms_to_restore)
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self.func_output = self.backup_restore.get_restore_summary(
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self.vms_to_restore
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)
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self.confirm_text_edit.setReadOnly(True)
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self.confirm_text_edit.setFontFamily("Monospace")
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self.confirm_text_edit.setText(self.func_output)
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self.confirm_page.emit(QtCore.SIGNAL("completeChanged()"))
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elif self.currentPage() is self.commit_page:
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self.button(self.FinishButton).setDisabled(True)
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self.showFileDialog.setEnabled(True)
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self.showFileDialog.setChecked(self.showFileDialog.isEnabled()
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and str(self.dir_line_edit.text())
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.count("media/") > 0)
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self.thread_monitor = thread_monitor.ThreadMonitor()
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thread = threading.Thread(target=self.__do_restore__,
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args=(self.thread_monitor,))
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thread.daemon = True
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thread.start()
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while not self.thread_monitor.is_finished():
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self.app.processEvents()
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time.sleep(0.1)
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try:
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for (signal_to_emit, data) in iter(
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self.feedback_queue.get_nowait, None):
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self.emit(signal_to_emit, data)
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except Empty:
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pass
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if not self.thread_monitor.success:
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if self.canceled:
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if self.tmpdir_to_remove and \
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QtGui.QMessageBox.warning(
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None,
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self.tr("Restore aborted"),
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self.tr("Do you want to remove temporary files "
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"from %s?") % self.tmpdir_to_remove,
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QtGui.QMessageBox.Yes,
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QtGui.QMessageBox.No) == QtGui.QMessageBox.Yes:
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shutil.rmtree(self.tmpdir_to_remove)
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else:
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QtGui.QMessageBox.warning(
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None,
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self.tr("Backup error!"),
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self.tr("ERROR: {0}").format(
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self.thread_monitor.error_msg))
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self.progress_bar.setMaximum(100)
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self.progress_bar.setValue(100)
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if self.showFileDialog.isChecked():
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self.append_output(
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'<b><font color="black">{0}</font></b>'.format(
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self.tr("Please unmount your backup volume and cancel "
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"the file selection dialog.")))
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self.app.processEvents()
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backup_utils.select_path_button_clicked(self, False, True)
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self.button(self.FinishButton).setEnabled(True)
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self.button(self.CancelButton).setEnabled(False)
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self.showFileDialog.setEnabled(False)
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signal.signal(signal.SIGCHLD, old_sigchld_handler)
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def all_vms_good(self):
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for vm_info in self.vms_to_restore.values():
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if not vm_info.vm:
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continue
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if not vm_info.good_to_go:
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return False
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return True
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def reject(self): # TODO: probably not working too
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if self.currentPage() is self.commit_page:
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if self.backup_restore.canceled:
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self.append_output('<font color="red">{0}</font>'.format(
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self.tr("Aborting the operation...")))
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self.button(self.CancelButton).setDisabled(True)
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else:
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self.done(0)
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def has_selected_dir(self):
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backup_location = self.dir_line_edit.text()
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if not backup_location:
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return False
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if self.appvm_combobox.currentIndex() == 0:
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if os.path.isfile(backup_location) or \
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os.path.isfile(os.path.join(backup_location, 'qubes.xml')):
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return True
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else:
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return True
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return False
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def has_selected_vms(self):
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return self.select_vms_widget.selected_list.count() > 0
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def backup_location_changed(self, new_dir=None):
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# pylint: disable=unused-argument
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self.select_dir_page.emit(QtCore.SIGNAL("completeChanged()"))
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# Bases on the original code by:
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# Copyright (c) 2002-2007 Pascal Varet <p.varet@gmail.com>
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def handle_exception(exc_type, exc_value, exc_traceback):
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filename, line, dummy, dummy = traceback.extract_tb(exc_traceback).pop()
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filename = os.path.basename(filename)
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error = "%s: %s" % (exc_type.__name__, exc_value)
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QtGui.QMessageBox.critical(None, "Houston, we have a problem...",
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"Whoops. A critical error has occured. "
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"This is most likely a bug "
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"in Qubes Restore VMs application.<br><br>"
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"<b><i>%s</i></b>" % error +
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"at <b>line %d</b> of file <b>%s</b>.<br/><br/>"
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% (line, filename))
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def main():
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qtapp = QtGui.QApplication(sys.argv)
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qtapp.setOrganizationName("The Qubes Project")
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qtapp.setOrganizationDomain("http://qubes-os.org")
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qtapp.setApplicationName("Qubes Restore VMs")
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sys.excepthook = handle_exception
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app = Qubes()
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restore_window = RestoreVMsWindow(qtapp, app)
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restore_window.show()
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qtapp.exec_()
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qtapp.exit()
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if __name__ == "__main__":
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main()
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