diff options
Diffstat (limited to 'Lib/pathlib.py')
| -rw-r--r-- | Lib/pathlib.py | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/Lib/pathlib.py b/Lib/pathlib.py index 8e6eb48..621fba0 100644 --- a/Lib/pathlib.py +++ b/Lib/pathlib.py @@ -124,16 +124,25 @@ class _WindowsFlavour(_Flavour): ext_namespace_prefix = '\\\\?\\' reserved_names = ( - {'CON', 'PRN', 'AUX', 'NUL'} | - {'COM%d' % i for i in range(1, 10)} | - {'LPT%d' % i for i in range(1, 10)} + {'CON', 'PRN', 'AUX', 'NUL', 'CONIN$', 'CONOUT$'} | + {'COM%s' % c for c in '123456789\xb9\xb2\xb3'} | + {'LPT%s' % c for c in '123456789\xb9\xb2\xb3'} ) # Interesting findings about extended paths: - # - '\\?\c:\a', '//?/c:\a' and '//?/c:/a' are all supported - # but '\\?\c:/a' is not - # - extended paths are always absolute; "relative" extended paths will - # fail. + # * '\\?\c:\a' is an extended path, which bypasses normal Windows API + # path processing. Thus relative paths are not resolved and slash is not + # translated to backslash. It has the native NT path limit of 32767 + # characters, but a bit less after resolving device symbolic links, + # such as '\??\C:' => '\Device\HarddiskVolume2'. + # * '\\?\c:/a' looks for a device named 'C:/a' because slash is a + # regular name character in the object namespace. + # * '\\?\c:\foo/bar' is invalid because '/' is illegal in NT filesystems. + # The only path separator at the filesystem level is backslash. + # * '//?/c:\a' and '//?/c:/a' are effectively equivalent to '\\.\c:\a' and + # thus limited to MAX_PATH. + # * Prior to Windows 8, ANSI API bytes paths are limited to MAX_PATH, + # even with the '\\?\' prefix. def splitroot(self, part, sep=sep): first = part[0:1] @@ -195,15 +204,16 @@ class _WindowsFlavour(_Flavour): def is_reserved(self, parts): # NOTE: the rules for reserved names seem somewhat complicated - # (e.g. r"..\NUL" is reserved but not r"foo\NUL"). - # We err on the side of caution and return True for paths which are - # not considered reserved by Windows. + # (e.g. r"..\NUL" is reserved but not r"foo\NUL" if "foo" does not + # exist). We err on the side of caution and return True for paths + # which are not considered reserved by Windows. if not parts: return False if parts[0].startswith('\\\\'): # UNC paths are never reserved return False - return parts[-1].partition('.')[0].upper() in self.reserved_names + name = parts[-1].partition('.')[0].partition(':')[0].rstrip(' ') + return name.upper() in self.reserved_names def make_uri(self, path): # Under Windows, file URIs use the UTF-8 encoding. |