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"""Script used to test os.kill on Windows, for issue #1220212
This script is started as a subprocess in test_os and is used to test the
CTRL_C_EVENT and CTRL_BREAK_EVENT signals, which requires a custom handler
to be written into the kill target.
See http://msdn.microsoft.com/en-us/library/ms685049%28v=VS.85%29.aspx for a
similar example in C.
"""
from ctypes import wintypes, WINFUNCTYPE
import signal
import ctypes
import mmap
import sys
# Function prototype for the handler function. Returns BOOL, takes a DWORD.
HandlerRoutine = WINFUNCTYPE(wintypes.BOOL, wintypes.DWORD)
def _ctrl_handler(sig):
"""Handle a sig event and return 0 to terminate the process"""
if sig == signal.CTRL_C_EVENT:
pass
elif sig == signal.CTRL_BREAK_EVENT:
pass
else:
print("UNKNOWN EVENT")
return 0
ctrl_handler = HandlerRoutine(_ctrl_handler)
SetConsoleCtrlHandler = ctypes.windll.kernel32.SetConsoleCtrlHandler
SetConsoleCtrlHandler.argtypes = (HandlerRoutine, wintypes.BOOL)
SetConsoleCtrlHandler.restype = wintypes.BOOL
if __name__ == "__main__":
# Add our console control handling function with value 1
if not SetConsoleCtrlHandler(ctrl_handler, 1):
print("Unable to add SetConsoleCtrlHandler")
exit(-1)
# Awaken mail process
m = mmap.mmap(-1, 1, sys.argv[1])
m[0] = '1'
# Do nothing but wait for the signal
while True:
pass