diff options
Diffstat (limited to 'Lib/ntpath.py')
| -rw-r--r-- | Lib/ntpath.py | 41 |
1 files changed, 26 insertions, 15 deletions
diff --git a/Lib/ntpath.py b/Lib/ntpath.py index 5481bb8888e..9cdc16480f9 100644 --- a/Lib/ntpath.py +++ b/Lib/ntpath.py @@ -29,7 +29,7 @@ __all__ = ["normcase","isabs","join","splitdrive","splitroot","split","splitext" "abspath","curdir","pardir","sep","pathsep","defpath","altsep", "extsep","devnull","realpath","supports_unicode_filenames","relpath", "samefile", "sameopenfile", "samestat", "commonpath", "isjunction", - "isdevdrive"] + "isdevdrive", "ALLOW_MISSING"] def _get_bothseps(path): if isinstance(path, bytes): @@ -601,9 +601,10 @@ try: from nt import _findfirstfile, _getfinalpathname, readlink as _nt_readlink except ImportError: # realpath is a no-op on systems without _getfinalpathname support. - realpath = abspath + def realpath(path, *, strict=False): + return abspath(path) else: - def _readlink_deep(path): + def _readlink_deep(path, ignored_error=OSError): # These error codes indicate that we should stop reading links and # return the path we currently have. # 1: ERROR_INVALID_FUNCTION @@ -636,7 +637,7 @@ else: path = old_path break path = normpath(join(dirname(old_path), path)) - except OSError as ex: + except ignored_error as ex: if ex.winerror in allowed_winerror: break raise @@ -645,7 +646,7 @@ else: break return path - def _getfinalpathname_nonstrict(path): + def _getfinalpathname_nonstrict(path, ignored_error=OSError): # These error codes indicate that we should stop resolving the path # and return the value we currently have. # 1: ERROR_INVALID_FUNCTION @@ -661,9 +662,10 @@ else: # 87: ERROR_INVALID_PARAMETER # 123: ERROR_INVALID_NAME # 161: ERROR_BAD_PATHNAME + # 1005: ERROR_UNRECOGNIZED_VOLUME # 1920: ERROR_CANT_ACCESS_FILE # 1921: ERROR_CANT_RESOLVE_FILENAME (implies unfollowable symlink) - allowed_winerror = 1, 2, 3, 5, 21, 32, 50, 53, 65, 67, 87, 123, 161, 1920, 1921 + allowed_winerror = 1, 2, 3, 5, 21, 32, 50, 53, 65, 67, 87, 123, 161, 1005, 1920, 1921 # Non-strict algorithm is to find as much of the target directory # as we can and join the rest. @@ -672,17 +674,18 @@ else: try: path = _getfinalpathname(path) return join(path, tail) if tail else path - except OSError as ex: + except ignored_error as ex: if ex.winerror not in allowed_winerror: raise try: # The OS could not resolve this path fully, so we attempt # to follow the link ourselves. If we succeed, join the tail # and return. - new_path = _readlink_deep(path) + new_path = _readlink_deep(path, + ignored_error=ignored_error) if new_path != path: return join(new_path, tail) if tail else new_path - except OSError: + except ignored_error: # If we fail to readlink(), let's keep traversing pass # If we get these errors, try to get the real name of the file without accessing it. @@ -690,7 +693,7 @@ else: try: name = _findfirstfile(path) path, _ = split(path) - except OSError: + except ignored_error: path, name = split(path) else: path, name = split(path) @@ -720,6 +723,15 @@ else: if normcase(path) == devnull: return '\\\\.\\NUL' had_prefix = path.startswith(prefix) + + if strict is ALLOW_MISSING: + ignored_error = FileNotFoundError + strict = True + elif strict: + ignored_error = () + else: + ignored_error = OSError + if not had_prefix and not isabs(path): path = join(cwd, path) try: @@ -727,17 +739,16 @@ else: initial_winerror = 0 except ValueError as ex: # gh-106242: Raised for embedded null characters - # In strict mode, we convert into an OSError. + # In strict modes, we convert into an OSError. # Non-strict mode returns the path as-is, since we've already # made it absolute. if strict: raise OSError(str(ex)) from None path = normpath(path) - except OSError as ex: - if strict: - raise + except ignored_error as ex: initial_winerror = ex.winerror - path = _getfinalpathname_nonstrict(path) + path = _getfinalpathname_nonstrict(path, + ignored_error=ignored_error) # The path returned by _getfinalpathname will always start with \\?\ - # strip off that prefix unless it was already provided on the original # path. |