Document the use of CTRL_BREAK_EVENT on Windows instead of SIGINT to interrupt workload executors about drivers-atlas-testing HOT 2 CLOSED

import subprocess
import os
import signal
import sys
import time


cmd = subprocess.Popen([sys.executable, "bgproc.py"],
        creationflags=subprocess.CREATE_NEW_PROCESS_GROUP,
        stdout=subprocess.PIPE, stderr=subprocess.PIPE)
time.sleep(2)
os.kill(cmd.pid, signal.CTRL_BREAK_EVENT)
stdout, stderr = cmd.communicate(timeout=10)

print("stdout: {}".format(stdout))
print("stderr: {}".format(stderr))
print("exit code: {}".format(cmd.returncode))

import signal

print("hello world")

def cleanup(signum, frame):
    print("caught ctrl-break!")
    exit(0)

signal.signal(signal.SIGBREAK, cleanup)

while True:
    pass

exit(0)

$ C:/python/Python37/python.exe pyscript.py
stdout: b'hello world\r\ncaught ctrl-break!\r\n'
stderr: b''
exit code: 0