/usr/lib/python3/dist-packages/diffoscope/comparators/device.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 | # -*- coding: utf-8 -*-
#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2015 Jérémy Bobbio <lunar@debian.org>
#
# 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 os
import stat
import logging
from diffoscope.tempfiles import get_named_temporary_file
from diffoscope.difference import Difference
from .binary import FilesystemFile
from .utils.file import File
logger = logging.getLogger(__name__)
class Device(File):
DESCRIPTION = "character/block devices"
@classmethod
def recognizes(cls, file):
return file.is_device()
def get_device(self):
assert isinstance(self, FilesystemFile)
st = os.lstat(self.name)
return st.st_mode, os.major(st.st_rdev), os.minor(st.st_rdev)
def has_same_content_as(self, other):
logger.debug("has_same_content: %s %s", self, other)
try:
return self.get_device() == other.get_device()
except (AttributeError, OSError):
# 'other' is not a device, or something.
logger.debug("has_same_content: Not a device: %s", other)
return False
def create_placeholder(self):
with get_named_temporary_file(mode='w+', delete=False) as f:
f.write(format_device(*self.get_device()))
f.flush()
return f.name
@property
def path(self):
if not hasattr(self, '_placeholder'):
self._placeholder = self.create_placeholder()
return self._placeholder
def cleanup(self):
if hasattr(self, '_placeholder'):
os.remove(self._placeholder)
del self._placeholder
super().cleanup()
def compare(self, other, source=None):
with open(self.path) as my_content, \
open(other.path) as other_content:
return Difference.from_text_readers(my_content, other_content, self.name, other.name, source=source, comment="device")
def format_device(mode, major, minor):
if stat.S_ISCHR(mode):
kind = 'character'
elif stat.S_ISBLK(mode):
kind = 'block'
else:
kind = 'weird'
return 'device:%s\nmajor: %d\nminor: %d\n' % (kind, major, minor)
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