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Merge "platform_utils_win32: remove an unnecessary workaround"

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Jonathan Nieder 2019-06-04 16:28:15 +00:00 committed by Gerrit Code Review
commit 025704e946
1 changed files with 5 additions and 12 deletions
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15
platform_utils_win32.py
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@ -17,7 +17,7 @@ import errno
from ctypes import WinDLL, get_last_error, FormatError, WinError, addressof
from ctypes import c_buffer
from ctypes.wintypes import BOOL, LPCWSTR, DWORD, HANDLE, POINTER, c_ubyte
from ctypes.wintypes import BOOL, BOOLEAN, LPCWSTR, DWORD, HANDLE, POINTER, c_ubyte
from ctypes.wintypes import WCHAR, USHORT, LPVOID, Structure, Union, ULONG
from ctypes.wintypes import byref
@ -33,7 +33,7 @@ ERROR_PRIVILEGE_NOT_HELD = 1314
# Win32 API entry points
CreateSymbolicLinkW = kernel32.CreateSymbolicLinkW
CreateSymbolicLinkW.restype = BOOL
CreateSymbolicLinkW.restype = BOOLEAN
CreateSymbolicLinkW.argtypes = (LPCWSTR, # lpSymlinkFileName In
LPCWSTR, # lpTargetFileName In
DWORD) # dwFlags In
@ -145,19 +145,12 @@ def create_dirsymlink(source, link_name):
def _create_symlink(source, link_name, dwFlags):
# Note: Win32 documentation for CreateSymbolicLink is incorrect.
# On success, the function returns "1".
# On error, the function returns some random value (e.g. 1280).
# The best bet seems to use "GetLastError" and check for error/success.
CreateSymbolicLinkW(link_name, source, dwFlags | SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE)
code = get_last_error()
if code != ERROR_SUCCESS:
if not CreateSymbolicLinkW(link_name, source, dwFlags | SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE):
# See https://github.com/golang/go/pull/24307/files#diff-b87bc12e4da2497308f9ef746086e4f0
# "the unprivileged create flag is unsupported below Windows 10 (1703, v10.0.14972).
# retry without it."
CreateSymbolicLinkW(link_name, source, dwFlags)
if not CreateSymbolicLinkW(link_name, source, dwFlags):
code = get_last_error()
if code != ERROR_SUCCESS:
error_desc = FormatError(code).strip()
if code == ERROR_PRIVILEGE_NOT_HELD:
raise OSError(errno.EPERM, error_desc, link_name)