/usr/lib/python2.7/dist-packages/AptFs/aptfile.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.
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 | # -*- coding: utf-8 -*-
# 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 errno
import fcntl
from .utils import flag_to_mode
class AptFsFile(object):
def __init__(self, path, flags, *mode):
self.file = os.fdopen(os.open(path, flags, *mode), flag_to_mode(flags))
self.fd = self.file.fileno()
def read(self, length, offset):
self.file.seek(offset)
return self.file.read(length)
def write(self, buf, offset):
self.file.seek(offset)
self.file.write(buf)
return len(buf)
def release(self, flags):
self.file.close()
def _fflush(self):
if 'w' in self.file.mode or 'a' in self.file.mode:
self.file.flush()
def fsync(self, isfsyncfile):
self._fflush()
if isfsyncfile and hasattr(os, 'fdatasync'):
os.fdatasync(self.fd)
else:
os.fsync(self.fd)
def flush(self):
self._fflush()
return os.close(os.dup(self.fd))
def fgetattr(self):
return os.fstat(self.fd)
def ftruncate(self, len):
self.file.truncate(len)
def lock(self, cmd, owner, **kwargs):
op = {
fcntl.F_UNLCK : fcntl.LOCK_UN,
fcntl.F_RDLCK : fcntl.LOCK_SH,
fcntl.F_WRLCK : fcntl.LOCK_EX,
}[kwargs['l_type']]
if cmd == fcntl.F_GETLK:
return -errno.EOPNOTSUPP
elif cmd == fcntl.F_SETLK:
if op != fcntl.LOCK_UN:
op |= fcntl.LOCK_NB
elif cmd == fcntl.F_SETLKW:
pass
else:
return -errno.EINVAL
fcntl.lockf(self.fd, op, kwargs['l_start'], kwargs['l_len'])
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