219 lines
8.7 KiB
Python
Executable File
219 lines
8.7 KiB
Python
Executable File
#!/usr/bin/python2
|
|
# -*- encoding: utf8 -*-
|
|
#
|
|
# The Qubes OS Project, http://www.qubes-os.org
|
|
#
|
|
# Copyright (C) 2010 Joanna Rutkowska <joanna@invisiblethingslab.com>
|
|
#
|
|
# 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
#
|
|
#
|
|
|
|
from qubes.qubes import QubesVmCollection
|
|
from qubes.qubes import QubesException
|
|
from qubes.backup import backup_prepare, backup_do
|
|
from qubes.qubesutils import size_to_human
|
|
from optparse import OptionParser
|
|
import qubes.backup
|
|
import os
|
|
import sys
|
|
import getpass
|
|
from locale import getpreferredencoding
|
|
|
|
def print_progress(progress):
|
|
print >> sys.stderr, "\r-> Backing up files: {0}%...".format (progress),
|
|
|
|
def main():
|
|
usage = "usage: %prog [options] <backup-dir-path> [vms-to-be-included ...]"
|
|
parser = OptionParser (usage)
|
|
|
|
parser.add_option ("-x", "--exclude", action="append",
|
|
dest="exclude_list", default=[],
|
|
help="Exclude the specified VM from the backup (may be "
|
|
"repeated)")
|
|
parser.add_option ("--force-root", action="store_true", dest="force_root", default=False,
|
|
help="Force to run with root privileges")
|
|
parser.add_option ("-d", "--dest-vm", action="store", dest="appvm",
|
|
help="Specify the destination VM to which the backup "
|
|
"will be sent (implies -e)")
|
|
parser.add_option ("-e", "--encrypt", action="store_true", dest="encrypt", default=False,
|
|
help="Encrypt the backup")
|
|
parser.add_option ("--no-encrypt", action="store_true",
|
|
dest="no_encrypt", default=False,
|
|
help="Skip encryption even if sending the backup to a "
|
|
"VM")
|
|
parser.add_option ("-p", "--passphrase-file", action="store",
|
|
dest="pass_file", default=None,
|
|
help="Read passphrase from a file, or use '-' to read "
|
|
"from stdin")
|
|
parser.add_option ("-E", "--enc-algo", action="store",
|
|
dest="crypto_algorithm", default=None,
|
|
help="Specify a non-default encryption algorithm. For a "
|
|
"list of supported algorithms, execute 'openssl "
|
|
"list-cipher-algorithms' (implies -e)")
|
|
parser.add_option ("-H", "--hmac-algo", action="store",
|
|
dest="hmac_algorithm", default=None,
|
|
help="Specify a non-default HMAC algorithm. For a list "
|
|
"of supported algorithms, execute 'openssl "
|
|
"list-message-digest-algorithms'")
|
|
parser.add_option ("-z", "--compress", action="store_true", dest="compress", default=False,
|
|
help="Compress the backup")
|
|
parser.add_option ("-Z", "--compress-filter", action="store",
|
|
dest="compress_filter", default=False,
|
|
help="Specify a non-default compression filter program "
|
|
"(default: gzip)")
|
|
parser.add_option("--tmpdir", action="store", dest="tmpdir", default=None,
|
|
help="Specify a temporary directory (if you have at least "
|
|
"1GB free RAM in dom0, use of /tmp is advised) ("
|
|
"default: /var/tmp)")
|
|
parser.add_option ("--debug", action="store_true", dest="debug",
|
|
default=False, help="Enable (a lot of) debug output")
|
|
|
|
(options, args) = parser.parse_args ()
|
|
|
|
if (len (args) < 1):
|
|
print >> sys.stderr, "You must specify the target backup directory "\
|
|
" (e.g. /mnt/backup)."
|
|
print >> sys.stderr, "qvm-backup will create a subdirectory there for "\
|
|
" each individual backup."
|
|
exit (0)
|
|
|
|
base_backup_dir = args[0]
|
|
|
|
if hasattr(os, "geteuid") and os.geteuid() == 0:
|
|
if not options.force_root:
|
|
print >> sys.stderr, "*** Running this tool as root is strongly "\
|
|
"discouraged. This will lead to permissions "\
|
|
"problems."
|
|
print >> sys.stderr, "Retry as an unprivileged user, or use "\
|
|
"--force-root to continue anyway."
|
|
exit(1)
|
|
|
|
# Only for locking
|
|
qvm_collection = QubesVmCollection()
|
|
qvm_collection.lock_db_for_reading()
|
|
qvm_collection.load()
|
|
|
|
vms = None
|
|
if (len (args) > 1):
|
|
vms = [qvm_collection.get_vm_by_name(vmname) for vmname in args[1:]]
|
|
|
|
if options.appvm:
|
|
options.exclude_list.append(options.appvm)
|
|
|
|
if options.appvm or options.crypto_algorithm:
|
|
options.encrypt = True
|
|
if options.no_encrypt:
|
|
options.encrypt = False
|
|
if options.debug:
|
|
qubes.backup.BACKUP_DEBUG = True
|
|
files_to_backup = None
|
|
try:
|
|
files_to_backup = backup_prepare(
|
|
vms_list=vms,
|
|
exclude_list=options.exclude_list,
|
|
hide_vm_names=options.encrypt)
|
|
except QubesException as e:
|
|
print >>sys.stderr, "ERROR: %s" % str(e)
|
|
exit(1)
|
|
|
|
total_backup_sz = reduce(lambda size, file: size+file["size"],
|
|
files_to_backup, 0)
|
|
|
|
if not options.appvm:
|
|
appvm = None
|
|
|
|
if os.path.isdir(base_backup_dir):
|
|
stat = os.statvfs(base_backup_dir)
|
|
else:
|
|
stat = os.statvfs(os.path.dirname(base_backup_dir))
|
|
backup_fs_free_sz = stat.f_bsize * stat.f_bavail
|
|
print
|
|
if (total_backup_sz > backup_fs_free_sz):
|
|
print >>sys.stderr, "ERROR: Not enough space available on the "\
|
|
"backup filesystem!"
|
|
exit(1)
|
|
|
|
print "-> Available space: {0}".format(size_to_human(backup_fs_free_sz))
|
|
else:
|
|
appvm = qvm_collection.get_vm_by_name(options.appvm)
|
|
if appvm is None:
|
|
print >>sys.stderr, "ERROR: VM {0} does not exist!".format(options.appvm)
|
|
exit(1)
|
|
|
|
stat = os.statvfs('/var/tmp')
|
|
backup_fs_free_sz = stat.f_bsize * stat.f_bavail
|
|
print
|
|
if (backup_fs_free_sz < 1000000000):
|
|
print >>sys.stderr, "ERROR: Not enough space available " \
|
|
"on the local filesystem (1GB required for temporary files)!"
|
|
exit(1)
|
|
|
|
if not appvm.is_running():
|
|
appvm.start(verbose=True)
|
|
|
|
if options.appvm:
|
|
print >>sys.stderr, ("NOTE: VM {} will be excluded because it is "
|
|
"the backup destination.").format(options.appvm)
|
|
options.exclude_list.append(options.appvm)
|
|
|
|
if not options.encrypt:
|
|
print >>sys.stderr, "WARNING: The backup will NOT be encrypted!"
|
|
|
|
if options.pass_file is not None:
|
|
f = open(options.pass_file) if options.pass_file != "-" else sys.stdin
|
|
passphrase = f.readline().rstrip()
|
|
if f is not sys.stdin:
|
|
f.close()
|
|
|
|
else:
|
|
if raw_input("Do you want to proceed? [y/N] ").upper() != "Y":
|
|
exit(0)
|
|
|
|
s = ("Please enter the passphrase that will be used to {}verify "
|
|
"the backup: ").format('encrypt and ' if options.encrypt else '')
|
|
passphrase = getpass.getpass(s)
|
|
|
|
if getpass.getpass("Enter again for verification: ") != passphrase:
|
|
print >>sys.stderr, "ERROR: Passphrase mismatch!"
|
|
exit(1)
|
|
|
|
encoding = sys.stdin.encoding or getpreferredencoding()
|
|
passphrase = passphrase.decode(encoding)
|
|
|
|
kwargs = {}
|
|
if options.hmac_algorithm:
|
|
kwargs['hmac_algorithm'] = options.hmac_algorithm
|
|
if options.crypto_algorithm:
|
|
kwargs['crypto_algorithm'] = options.crypto_algorithm
|
|
if options.tmpdir:
|
|
kwargs['tmpdir'] = options.tmpdir
|
|
|
|
try:
|
|
backup_do(base_backup_dir, files_to_backup, passphrase,
|
|
progress_callback=print_progress,
|
|
encrypted=options.encrypt,
|
|
compressed=options.compress_filter or options.compress,
|
|
appvm=appvm, **kwargs)
|
|
except QubesException as e:
|
|
print >>sys.stderr, "ERROR: %s" % str(e)
|
|
exit(1)
|
|
|
|
print
|
|
print "-> Backup completed."
|
|
|
|
qvm_collection.unlock_db()
|
|
main()
|