CODEWITHSUNDEEP
pythonwindows
V. Brunelle
V. Brunelle

Reputation: 1068

Terminate Python Process and halt it's underlying os.system command line

I am running a script that launches a program via cmd and then, while the program is open, checks the log file of the program for errors. If any, close the program.

I cannot use taskkill command since I don't know the PID of the process and the image is the same as other processes that I don't want to kill.

Here is a code example:

import os, multiprocessing, time

def runprocess():
    os.system('"notepad.exe"')

if __name__ == '__main__':
    process = multiprocessing.Process(target=runprocess,args=[])
    process.start()
    time.sleep(5)

    #Continuously checking if errors in log file here...
    process_has_errors = True #We suppose an error has been found for our case.

    if process_has_errors:
        process.terminate()

The problem is that I want the notepad windows to close. It seems like the terminate() method will simply disconnect the process without closing all it's tasks.

What can I do to make sure to end all pending tasks in a process when terminating it, instead of simply disconnecting the process from those tasks?

Upvotes: 0

Views: 1020

Answers (2)

stars
stars

Reputation: 23

You could use a system call if you know the name of the process:

import os
...
    if process_has_errors:
        processName = "notepad.exe"
        process.terminate()
        os.system(f"TASKKILL /F /IM {processName}")

Upvotes: 0

kutschkem
kutschkem

Reputation: 8163

You can use taskkill but you have to use the /T (and maybe /F) switch so all child processes of the cmd process are killed too. You get the process id of the cmd task via process.pid.

Upvotes: 1

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