bpo-38081: Add more non-fatal error codes for ntpath.realpath (GH-16156)
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@ -530,15 +530,28 @@ else:
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if seen is None:
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seen = set()
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# These error codes indicate that we should stop reading links and
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# return the path we currently have.
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# 1: ERROR_INVALID_FUNCTION
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# 2: ERROR_FILE_NOT_FOUND
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# 3: ERROR_DIRECTORY_NOT_FOUND
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# 5: ERROR_ACCESS_DENIED
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# 21: ERROR_NOT_READY (implies drive with no media)
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# 32: ERROR_SHARING_VIOLATION (probably an NTFS paging file)
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# 50: ERROR_NOT_SUPPORTED (implies no support for reparse points)
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# 67: ERROR_BAD_NET_NAME (implies remote server unavailable)
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# 87: ERROR_INVALID_PARAMETER
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# 4390: ERROR_NOT_A_REPARSE_POINT
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# 4392: ERROR_INVALID_REPARSE_DATA
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# 4393: ERROR_REPARSE_TAG_INVALID
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allowed_winerror = 1, 2, 3, 5, 21, 32, 50, 67, 87, 4390, 4392, 4393
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while normcase(path) not in seen:
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seen.add(normcase(path))
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try:
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path = _nt_readlink(path)
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except OSError as ex:
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# Stop on incorrect function (1), file (2) or
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# directory (3) not found, or paths that are
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# not reparse points (4390)
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if ex.winerror in (1, 2, 3, 4390):
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if ex.winerror in allowed_winerror:
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break
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raise
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except ValueError:
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@ -554,9 +567,20 @@ else:
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except OSError:
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pass
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# Allow file (2) or directory (3) not found, incorrect parameter (87),
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# invalid syntax (123), and symlinks that cannot be followed (1921)
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allowed_winerror = 2, 3, 87, 123, 1921
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# These error codes indicate that we should stop resolving the path
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# and return the value we currently have.
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# 1: ERROR_INVALID_FUNCTION
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# 2: ERROR_FILE_NOT_FOUND
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# 3: ERROR_DIRECTORY_NOT_FOUND
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# 5: ERROR_ACCESS_DENIED
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# 21: ERROR_NOT_READY (implies drive with no media)
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# 32: ERROR_SHARING_VIOLATION (probably an NTFS paging file)
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# 50: ERROR_NOT_SUPPORTED
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# 67: ERROR_BAD_NET_NAME (implies remote server unavailable)
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# 87: ERROR_INVALID_PARAMETER
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# 123: ERROR_INVALID_NAME
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# 1921: ERROR_CANT_RESOLVE_FILENAME (implies unfollowable symlink)
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allowed_winerror = 1, 2, 3, 5, 21, 32, 50, 67, 87, 123, 1921
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# Non-strict algorithm is to find as much of the target directory
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# as we can and join the rest.
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@ -571,6 +595,9 @@ else:
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if ex.winerror not in allowed_winerror:
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raise
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path, name = split(path)
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# TODO (bpo-38186): Request the real file name from the directory
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# entry using FindFirstFileW. For now, we will return the path
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# as best we have it
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if path and not name:
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return abspath(path + tail)
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tail = join(name, tail) if tail else name
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