python - 用python杀死进程

Question

我需要制作一个脚本，从用户那里获取以下内容:

1) 进程名称(在 linux 上)。

2) 该进程写入的日志文件名。

它需要杀死进程并验证进程是否已关闭。将日志文件名更改为带有时间和日期的新文件名。然后再次运行该进程，验证它是否正常运行，以便继续写入日志文件。

在此先感谢您的帮助。

Answer 1

您可以使用 pgrep 命令检索给定名称的进程 ID (PID)，如下所示:

import subprocess
import signal
import os
from datetime import datetime as dt


process_name = sys.argv[1]
log_file_name = sys.argv[2]


proc = subprocess.Popen(["pgrep", process_name], stdout=subprocess.PIPE) 

# Kill process.
for pid in proc.stdout:
    os.kill(int(pid), signal.SIGTERM)
    # Check if the process that we killed is alive.
    try: 
       os.kill(int(pid), 0)
       raise Exception("""wasn't able to kill the process 
                          HINT:use signal.SIGKILL or signal.SIGABORT""")
    except OSError as ex:
       continue

# Save old logging file and create a new one.
os.system("cp {0} '{0}-dup-{1}'".format(log_file_name, dt.now()))

# Empty the logging file.
with open(log_file_name, "w") as f:
    pass

# Run the process again.
os.sytsem("<command to run the process>") 
# you can use os.exec* if you want to replace this process with the new one which i think is much better in this case.

# the os.system() or os.exec* call will failed if something go wrong like this you can check if the process is runninh again.

希望对你有帮助