bl3kill.py

#!/usr/bin/env python
# vim: set expandtab tabstop=4 shiftwidth=4:

import os
import time
import psutil
import signal

def find_main_pid():
    """
    Find the Borderlands3 process to kill
    """
    for proc in psutil.process_iter(attrs=["name", "cmdline"]):
        if proc.info['name'] == 'Borderlands3.ex':
            return proc.pid
    return None

def find_secondary_pid():
    """
    Find our secondary steam process which often seems to hang around
    on the newer GE Proton that I'm using.
    """
    for proc in psutil.process_iter(attrs=["name", "cmdline"]):
        if (proc.info['name'] == 'steam'
                and len(proc.info['cmdline']) >= 2
                and 'Borderlands3.exe' in proc.info['cmdline'][1]
                ):
            return proc.pid
    return None

def kill_process(label, pid_func):
    """
    Returns True if there was a process to kill, whether or not
    it was successfully killed, or False otherwise
    """
    pid = pid_func()
    if pid is None:
        print("Couldn't find {} process...".format(label))
        return False
    else:
        print('Killing {} PID: {}'.format(label, pid))
        os.kill(pid, signal.SIGTERM)
        print('...')
        time.sleep(2)
        pid = pid_func()
        if pid is None:
            print('Killed!')
        else:
            print('Unable to kill PID {}!'.format(pid))
        return True

# Main BL3 Proc
if kill_process('main Borderlands 3', find_main_pid):
    print('Waiting another 5 sec for things to settle...')
    time.sleep(5)

# ... and the Steam proc
kill_process('secondary Steam', find_secondary_pid)