将 Ctrl-C 发送到子进程 [英] Sending Ctrl-C to a child process

问题描述

我正在使用 tkinter 构建一个终端 shell 程序.用户能够运行任意程序(并不总是 python 脚本).这是我开始新流程的方式:

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())

这是我的 test.py 程序:

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

我在向进程发送 Ctrl-c 事件时遇到问题.我正在使用 Python 3.7.9.我尝试了所有这些，但都没有达到预期的效果.

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

根据信号文档 SIGINT 和 CTRL_C_EVENT 应该在 Windows 上工作.

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

想要的效果和我按Ctrl-c时cmd的效果一样:

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:完整代码在这里但是很长.

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

推荐答案

如果您想使用 Ctrl + C 杀死 test.py，请尝试类似的操作

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)

如有任何问题，请随时发表评论.

Feel free to comment in case of any question.

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