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'''

This script gets the version number from ucrtbased.dll and checks

whether it is a version with a known issue.

'''

import sys

from ctypes import (c_buffer, POINTER, byref, create_unicode_buffer,

Structure, WinDLL)

from ctypes.wintypes import DWORD, HANDLE

class VS_FIXEDFILEINFO(Structure):

_fields_ = [

("dwSignature", DWORD),

("dwStrucVersion", DWORD),

("dwFileVersionMS", DWORD),

("dwFileVersionLS", DWORD),

("dwProductVersionMS", DWORD),

("dwProductVersionLS", DWORD),

("dwFileFlagsMask", DWORD),

("dwFileFlags", DWORD),

("dwFileOS", DWORD),

("dwFileType", DWORD),

("dwFileSubtype", DWORD),

("dwFileDateMS", DWORD),

("dwFileDateLS", DWORD),

]

kernel32 = WinDLL('kernel32')

version = WinDLL('version')

if len(sys.argv) < 2:

print('Usage: validate_ucrtbase.py <ucrtbase|ucrtbased>')

sys.exit(2)

try:

ucrtbased = WinDLL(sys.argv[1])

except OSError:

print('Cannot find ucrtbased.dll')

# This likely means that VS is not installed, but that is an

# obvious enough problem if you're trying to produce a debug

# build that we don't need to fail here.

sys.exit(0)

# We will immediately double the length up to MAX_PATH, but the

# path may be longer, so we retry until the returned string is

# shorter than our buffer.

name_len = actual_len = 130

while actual_len == name_len:

name_len *= 2

name = create_unicode_buffer(name_len)

actual_len = kernel32.GetModuleFileNameW(HANDLE(ucrtbased._handle),

name, len(name))

if not actual_len:

print('Failed to get full module name.')

sys.exit(2)

size = version.GetFileVersionInfoSizeW(name, None)

if not size:

print('Failed to get size of version info.')

sys.exit(2)

ver_block = c_buffer(size)

if (not version.GetFileVersionInfoW(name, None, size, ver_block) or

not ver_block):

print('Failed to get version info.')

sys.exit(2)

pvi = POINTER(VS_FIXEDFILEINFO)()

if not version.VerQueryValueW(ver_block, "", byref(pvi), byref(DWORD())):

print('Failed to get version value from info.')

sys.exit(2)

ver = (

pvi.contents.dwProductVersionMS >> 16,

pvi.contents.dwProductVersionMS & 0xFFFF,

pvi.contents.dwProductVersionLS >> 16,

pvi.contents.dwProductVersionLS & 0xFFFF,

)

print('{} is version {}.{}.{}.{}'.format(name.value, *ver))

if ver < (10, 0, 10586):

print('WARN: ucrtbased contains known issues. '

'Please update the Windows 10 SDK.')

print('See:')

print(' http://bugs.python.org/issue27705')

print(' https://developer.microsoft.com/en-US/windows/downloads/windows-10-sdk')

sys.exit(1)