/usr/lib/python2.7/dist-packages/AptFs/aptfs.py is in aptfs 2:0.10-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# aptfs — FUSE filesystem for APT source repositories
# Copyright © 2008—2016 Chris Lamb <lamby@debian.org>
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
import os
import fuse
import stat
import errno
import shutil
import itertools
from .utils import BaseDirException, MyStat, get_package_info
from .aptfile import AptFsFile
from .download import download, DownloadError
fuse.fuse_python_api = (0, 2)
fuse.feature_assert('stateful_files', 'has_destroy')
class AptFs(fuse.Fuse):
def __init__(self, *args, **kwargs):
fuse.Fuse.__init__(self, *args, **kwargs)
self.source_packages = {}
self.binary_packages = {}
self.max_unpacked_packages = 3
self.secure = False
self.temp_dir = None
self.show_binary_symlinks = True
self.window = []
def main(self, *args, **kwargs):
fuse.Fuse.main(self, *args, **kwargs)
def fsinit(self):
for x, y in get_package_info():
self.source_packages[x] = None
if self.show_binary_symlinks:
for z in y:
self.binary_packages[z] = x
def fsdestroy(self):
for x in self.window:
path = os.path.dirname(self.source_packages[x])
shutil.rmtree(path)
##
def rewrite_path(self, path):
dir = path.split('/')[1:]
def parse_path():
pkg = dir[0]
if pkg == '':
raise BaseDirException
try:
return pkg, self.source_packages[pkg]
except KeyError:
pkg = self.binary_packages[pkg]
return pkg, self.source_packages[pkg]
pkg, target = parse_path()
if target is None:
try:
target = download(pkg, self.temp_dir, self.secure)
except DownloadError, e:
shutil.rmtree(e.basedir)
raise
self.source_packages[pkg] = target
self.window.insert(0, pkg)
while len(self.window) > self.max_unpacked_packages:
srcpkg = self.window.pop()
del_path = self.source_packages[srcpkg]
shutil.rmtree(os.path.dirname(del_path))
self.source_packages[srcpkg] = None
return target + '/' + '/'.join(dir[1:])
def getattr(self, path):
dir = path.split('/')[1:]
if len(dir) == 1:
st = MyStat()
st.st_mode = stat.S_IFDIR | 0755
pkg = dir[0]
if pkg == '':
st.st_nlink = 2 + len(self.source_packages)
else:
st.st_nlink = 3
if pkg not in self.source_packages and \
pkg not in self.binary_packages:
return -errno.ENOENT
if pkg in self.binary_packages:
st.st_mode = stat.S_IFLNK | 0777
return st
try:
return os.lstat(self.rewrite_path(path))
except KeyError:
return -errno.ENOENT
def open(self, path, flags):
return AptFsFile(self.rewrite_path(path), flags)
def read(self, path, length, offset, fileobj):
return fileobj.read(length, offset)
def readlink(self, path):
try:
dir = path.split('/')[1:]
if len(dir) == 1:
pkg = dir[0]
if not self.show_binary_symlinks or pkg == '':
return -errno.EACCES
return self.binary_packages[pkg]
return os.readlink(self.rewrite_path(path))
except (BaseDirException, KeyError):
return -errno.EACCES
def readdir(self, path, offset):
try:
for x in os.listdir(self.rewrite_path(path)):
yield fuse.Direntry(x)
except BaseDirException:
yield fuse.Direntry('.')
yield fuse.Direntry('..')
if self.show_binary_symlinks:
entries = itertools.chain(self.source_packages, self.binary_packages)
else:
entries = self.source_packages
for x in sorted(entries):
yield fuse.Direntry(x)
def unlink(self, path):
try:
os.unlink(self.rewrite_path(path))
except (BaseDirException, KeyError):
return -errno.EACCES
def rmdir(self, path):
try:
os.rmdir(self.rewrite_path(path))
except (BaseDirException, KeyError):
return -errno.EACCES
def symlink(self, path, path1):
try:
os.symlink(path, self.rewrite_path(path1))
except (BaseDirException, KeyError):
return -errno.EACCES
def rename(self, path, path1):
try:
os.rename(self.rewrite_path(path), self.rewrite_path(path1))
except (BaseDirException, KeyError):
return -errno.EACCES
def link(self, path, path1):
try:
os.link(self.rewrite_path(path), self.rewrite_path(path1))
except (BaseDirException, KeyError):
return -errno.EACCES
def chmod(self, path, mode):
try:
os.chmod(self.rewrite_path(path), mode)
except (BaseDirException, KeyError):
return -errno.EACCES
def chown(self, path, user, group):
try:
os.chown(self.rewrite_path(path), user, group)
except (BaseDirException, KeyError):
return -errno.EACCES
def truncate(self, path, len):
try:
f = open(self.rewrite_path(path), "a")
f.truncate(len)
f.close()
except (BaseDirException, KeyError):
return -errno.EACCES
def mknod(self, path, mode, dev):
try:
os.mknod(self.rewrite_path(path), mode, dev)
except KeyError:
return -errno.EACCES
def mkdir(self, path, mode):
try:
os.mkdir(self.rewrite_path(path), mode)
except KeyError:
return -errno.EACCES
def utime(self, path, times):
try:
os.utime(self.rewrite_path(path), times)
except (BaseDirException, KeyError):
return -errno.EACCES
def access(self, path, mode):
try:
if not os.access(self.rewrite_path(path), mode):
return -errno.EACCES
except BaseDirException:
return 0
def create(self, path, flags, *mode):
try:
return AptFsFile(self.rewrite_path(path), flags, *mode)
except KeyError:
return -errno.EACCES
def flush(self, path, aptfile):
try:
self.rewrite_path(path)
return aptfile.flush()
except BaseDirException:
return -errno.EACCES
def write(self, path, buf, offset, aptfile):
try:
self.rewrite_path(path)
return aptfile.write(buf, offset)
except BaseDirException:
return -errno.EACCES
def release(self, path, flags, aptfile):
try:
self.rewrite_path(path)
return aptfile.release(flags)
except BaseDirException:
return -errno.EACCES
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