/usr/lib/python2.7/dist-packages/mutagen/_senf/_environ.py is in python-mutagen 1.36-1.
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 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 | # -*- coding: utf-8 -*-
# Copyright 2016 Christoph Reiter
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
import os
import ctypes
import collections
from ._compat import text_type, PY2
from ._fsnative import path2fsn, is_win, _fsn2legacy, fsnative
from . import _winapi as winapi
def get_windows_env_var(key):
"""Get an env var.
Raises:
WindowsError
"""
if not isinstance(key, text_type):
raise TypeError("%r not of type %r" % (key, text_type))
buf = ctypes.create_unicode_buffer(32767)
stored = winapi.GetEnvironmentVariableW(key, buf, 32767)
if stored == 0:
raise ctypes.WinError()
return buf[:stored]
def set_windows_env_var(key, value):
"""Set an env var.
Raises:
WindowsError
"""
if not isinstance(key, text_type):
raise TypeError("%r not of type %r" % (key, text_type))
if not isinstance(value, text_type):
raise TypeError("%r not of type %r" % (value, text_type))
status = winapi.SetEnvironmentVariableW(key, value)
if status == 0:
raise ctypes.WinError()
def del_windows_env_var(key):
"""Delete an env var.
Raises:
WindowsError
"""
if not isinstance(key, text_type):
raise TypeError("%r not of type %r" % (key, text_type))
status = winapi.SetEnvironmentVariableW(key, None)
if status == 0:
raise ctypes.WinError()
def read_windows_environ():
"""Returns a unicode dict of the Windows environment.
Raises:
WindowsEnvironError
"""
res = winapi.GetEnvironmentStringsW()
if not res:
raise ctypes.WinError()
res = ctypes.cast(res, ctypes.POINTER(ctypes.c_wchar))
done = []
current = u""
i = 0
while 1:
c = res[i]
i += 1
if c == u"\x00":
if not current:
break
done.append(current)
current = u""
continue
current += c
dict_ = {}
for entry in done:
try:
key, value = entry.split(u"=", 1)
except ValueError:
continue
key = _norm_key(key)
dict_[key] = value
status = winapi.FreeEnvironmentStringsW(res)
if status == 0:
raise ctypes.WinError()
return dict_
def _norm_key(key):
assert isinstance(key, fsnative)
if is_win:
key = key.upper()
return key
class Environ(collections.MutableMapping):
"""Dict[`fsnative`, `fsnative`]: Like `os.environ` but contains unicode
keys and values under Windows + Python 2.
Any changes made will be forwarded to `os.environ`.
"""
def __init__(self):
if is_win and PY2:
try:
env = read_windows_environ()
except WindowsError:
env = {}
else:
env = os.environ
self._env = env
def __getitem__(self, key):
key = _norm_key(path2fsn(key))
return self._env[key]
def __setitem__(self, key, value):
key = _norm_key(path2fsn(key))
value = path2fsn(value)
if is_win and PY2:
# this calls putenv, so do it first and replace later
try:
os.environ[_fsn2legacy(key)] = _fsn2legacy(value)
except OSError:
raise ValueError
try:
set_windows_env_var(key, value)
except WindowsError:
# py3+win fails for invalid keys. try to do the same
raise ValueError
try:
self._env[key] = value
except OSError:
raise ValueError
def __delitem__(self, key):
key = _norm_key(path2fsn(key))
if is_win and PY2:
try:
del_windows_env_var(key)
except WindowsError:
pass
try:
del os.environ[_fsn2legacy(key)]
except KeyError:
pass
del self._env[key]
def __iter__(self):
return iter(self._env)
def __len__(self):
return len(self._env)
def __repr__(self):
return repr(self._env)
def copy(self):
return self._env.copy()
environ = Environ()
def getenv(key, value=None):
"""Like `os.getenv` but returns unicode under Windows + Python 2
Args:
key (pathlike): The env var to get
value (object): The value to return if the env var does not exist
Returns:
`fsnative` or `object`:
The env var or the passed value if it doesn't exist
"""
key = path2fsn(key)
if is_win and PY2:
return environ.get(key, value)
return os.getenv(key, value)
def unsetenv(key):
"""Like `os.unsetenv` but takes unicode under Windows + Python 2
Args:
key (pathlike): The env var to unset
"""
key = path2fsn(key)
if is_win:
# python 3 has no unsetenv under Windows -> use our ctypes one as well
try:
del_windows_env_var(key)
except WindowsError:
pass
else:
os.unsetenv(key)
def putenv(key, value):
"""Like `os.putenv` but takes unicode under Windows + Python 2
Args:
key (pathlike): The env var to get
value (pathlike): The value to set
Raises:
ValueError
"""
key = path2fsn(key)
value = path2fsn(value)
if is_win and PY2:
try:
set_windows_env_var(key, value)
except WindowsError:
# py3 + win fails here
raise ValueError
else:
try:
os.putenv(key, value)
except OSError:
# win + py3 raise here for invalid keys which is probably a bug.
# ValueError seems better
raise ValueError
|