/usr/lib/python3/dist-packages/diffoscope/comparators/fsimage.py is in diffoscope 93ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 | # -*- coding: utf-8 -*-
#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2015 Reiner Herrmann <reiner@reiner-h.de>
#
# diffoscope 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 3 of the License, or
# (at your option) any later version.
#
# diffoscope 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 diffoscope. If not, see <https://www.gnu.org/licenses/>.
import re
import logging
import os.path
from diffoscope.difference import Difference
from .utils.file import File
from .utils.archive import Archive
try:
import guestfs
except ImportError:
guestfs = None
logger = logging.getLogger(__name__)
class FsImageContainer(Archive):
def open_archive(self):
if not guestfs:
return None
self.g = guestfs.GuestFS(python_return_dict=True)
try:
# force a check that LIBGUESTFS_CACHEDIR exists. otherwise guestfs
# will fall back to /var/tmp, which we don't want
self.g.set_cachedir(os.environ['LIBGUESTFS_CACHEDIR'])
except KeyError:
pass
self.g.add_drive_opts(self.source.path, format='raw', readonly=1)
try:
self.g.launch()
except RuntimeError:
logger.exception("guestfs failed to launch")
logger.error("If memory is too tight for 512 MiB, try running "
"with LIBGUESTFS_MEMSIZE=256 or lower.")
return None
devices = self.g.list_devices()
self.g.mount(devices[0], '/')
self.fs = self.g.list_filesystems()[devices[0]]
return self
def close_archive(self):
if not guestfs:
return None
self.g.umount_all()
self.g.close()
def get_member_names(self):
return [os.path.basename(self.source.path) + '.tar']
def extract(self, member_name, dest_dir):
dest_path = os.path.join(dest_dir, member_name)
logger.debug('filesystem image extracting to %s', dest_path)
self.g.tar_out('/', dest_path)
return dest_path
class FsImageFile(File):
DESCRIPTION = "ext2/ext3/ext4/btrfs filesystems"
CONTAINER_CLASS = FsImageContainer
FILE_TYPE_RE = re.compile(r'^(Linux.*filesystem data|BTRFS Filesystem).*')
def compare_details(self, other, source=None):
differences = []
my_fs = ''
other_fs = ''
if hasattr(self.as_container, 'fs'):
my_fs = self.as_container.fs
if hasattr(other.as_container, 'fs'):
other_fs = other.as_container.fs
if my_fs != other_fs:
differences.append(Difference.from_text(
my_fs, other_fs, None, None, source="filesystem",
))
return differences
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