如何在Python中检查是否存在具有给定pid的进程? [英] How to check if there exists a process with a given pid in Python?
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问题描述
是否可以检查pid是否与有效进程相对应?我从os.getpid()
以外的其他来源获取了一个pid,我需要检查计算机上是否不存在具有该pid的进程.
Is there a way to check to see if a pid corresponds to a valid process? I'm getting a pid from a different source other than from os.getpid()
and I need to check to see if a process with that pid doesn't exist on the machine.
我需要它可以在Unix和Windows中使用.我还在检查PID是否未使用.
I need it to be available in Unix and Windows. I'm also checking to see if the PID is NOT in use.
推荐答案
如果pid没有运行,则向pid发送信号0将引发OSError异常,否则不执行任何操作.
Sending signal 0 to a pid will raise an OSError exception if the pid is not running, and do nothing otherwise.
import os
def check_pid(pid):
""" Check For the existence of a unix pid. """
try:
os.kill(pid, 0)
except OSError:
return False
else:
return True
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