用python杀死进程

Question

我需要制作一个从用户获取以下内容的脚本：

1）进程名称（在Linux上）。

2）此进程写入的日志文件名。

它需要终止该进程并确认该进程已关闭。将日志文件名更改为带有时间和日期的新文件名。然后再次运行该过程，确认它已启动，以便继续写入日志文件。

先谢谢您的帮助。

Answer 1

您可以使用以下pgrep命令检索给定名称的进程ID（PID）：

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.

希望这可以帮助