将 Ctrl-C 发送到子进程

Question

I am building a terminal shell program using tkinter . The user is able to run any arbitrary program (not always python scripts). This is how I start the new process:

self.proc = subprocess.Popen("test.py", close_fds=False, shell=True, **get_std_child())

This is my test.py program:

import time
try:
    print("Start")
    time.sleep(10)
    print("End")
except KeyboardInterrupt as error:
    print(repr(error), "!")

I am having trouble sending a Ctrl-c event to the process. I am using Python 3.7.9. I tried all of these but none of them have the desired effect.

from signal import SIGINT, CTRL_C_EVENT, CTRL_BREAK_EVENT
proc.send_signal(SIGINT) # `ValueError: Unsupported signal: 2`
os.kill(proc.pid, SIGINT) # Doesn't do anything until I press it again then it throws: PermissionError: [WinError 5] Access is denied
os.kill(proc.pid, CTRL_C_EVENT) # SystemError: <built-in function kill> returned a result with an error set
os.kill(proc.pid, CTRL_BREAK_EVENT) # SystemError: <built-in function kill> returned a result with an error set

According to the signal documentation SIGINT as well as CTRL_C_EVENT should work on Windows.

The desired effect is the same as what happens to cmd when I press Ctrl-c :

C:\Users\TheLizzard\Documents\GitHub\Bismuth-184\src>python test.py
Start
KeyboardInterrupt() !

C:\Users\TheLizzard\Documents\GitHub\Bismuth-184\src>

PS: The full code is here but it's very long.

Answer 1

If you want to kill test.py using Ctrl + C, then try something like

def signal_handler(signal):
            self.proc.terminate()
            sys.exit(0)
        
signal.signal(signal.SIGINT, signal_handler)

Feel free to comment in case of any question.