bash 如何查找/杀死特定的python程序
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How to find/kill a specific python program
提问by Chris
There are two different python programs running in this VM
此 VM 中运行着两个不同的 Python 程序
one is a background job who monitors a folder and then 'does stuff' (with several workers)
一个是监控文件夹然后“做事”的后台工作（有几个工人）
10835 ? Sl 0:03 python main.py
10844 ? Sl 34:02 python main.py
10845 ? S 33:43 python main.py
the second one is started via script
第二个是通过脚本启动的
20056 pts/1 S+ 0:00 /bin/bash ./exp.sh
20069 pts/1 S+ 0:00 /bin/bash ./exp.sh
20087 pts/1 S+ 0:10 python /home/path/second.py
i have tried numerous things to find a way to kill only the main program (i want to build a cron watchdog), but non succeded
我尝试了很多方法来找到只杀死主程序的方法（我想构建一个 cron 看门狗），但没有成功
first one i want to find only the hanging 'python main.py' process (accompanied by [defunct]), but i cant even find just this process alone.
第一个我只想找到挂起的“python main.py”进程（伴随着 [defunct]），但我什至无法单独找到这个进程。
the upper ones are from ps -ax (so they both are running currently) pgrep 'python' returns all PIDs, also from second.py which i dont want: (not usefull, so is pkill therefore)
上面的来自 ps -ax（所以它们当前都在运行） pgrep 'python' 返回所有 PID，也来自我不想要的 second.py ：（没有用，因此 pkill 也是如此）
pgrep 'python'
10835
10844
10845
20087
pgrep 'python main.py' always returns empty, so does pgrep 'main.py;
pgrep 'python main.py' 总是返回空， pgrep 'main.py 也是如此；
the only thing which works
唯一有效的东西
ps ax | grep 'python main.py'
but this one also returns its own PID, grepping 'ps' isn't a prefered solution afair. when main.py hangs, it shows "python main.py [defunct]". a
但是这个也返回它自己的PID，grepping 'ps' 不是一个首选的解决方案。当 main.py 挂起时，它显示“python main.py [defunct]”。一种
ps ax | grep 'python main.py [defunct]'
is useless as test as it always returns true. pgrep for anything more than 'python' also returns always false. i am a bit clueless.
作为测试没用，因为它总是返回真。除了 'python' 以外的任何东西的 pgrep 也总是返回 false。我有点不知所措。
采纳答案by Pavel Strakhov
In your daemon python script you should create PID file:
在您的守护进程 python 脚本中，您应该创建 PID 文件：
def writePidFile():
pid = str(os.getpid())
f = open('/tmp/my_pid', 'w')
f.write(pid)
f.close()
Now killing this process is simple:
现在杀死这个进程很简单：
kill `cat /tmp/my_pid`
Or you can just use grepand filter its own process:
或者你可以使用grep和过滤它自己的过程：
ps ax | grep 'python main.py [defunct]' | grep -v grep
回答by irbanana
This works for me. Found it on the pgrepbro pages.
这对我有用。在pgrep兄弟页面上找到它。
Find the pids of processes with 'test.py' as an argument, like 'python test.py'
以“test.py”为参数查找进程的pid，例如“python test.py”
pgrep -f test.py
And I use it to check if a python process is running:
我用它来检查 python 进程是否正在运行：
searcher="backend/webapi.py"
if pgrep -f "$searcher" > /dev/null
then
echo "$(date +%y-%m-%d-%H-%M-%S) $searcher is alive. Doing nothing."
else
echo "No $searcher. Kickstarting..."
pushd $HOME/there/;
./run_backend
popd;
echo "Pgrepping $searcher:"
pgrep "$searcher" # out to loggers
fi
回答by Hristiyan Andreev
I think I've found a pretty safe way to do find the proper python process PID for a specific file only. The idea is to find all the python processes, then all "test.py" processes and intersect the results to find the correct PID.
我想我已经找到了一种非常安全的方法来为特定文件找到正确的 python 进程 PID。这个想法是找到所有的python进程，然后所有“test.py”进程并将结果相交以找到正确的PID。
I use the subprocess module in a python script (you can interpolate for .sh script):
我在 python 脚本中使用 subprocess 模块（您可以插入 .sh 脚本）：
import subprocess as subp
#Get a list of all processes with a certain name
def get_pid(name):
return list(map(int,subp.check_output(["pidof", "-c", name]).split()))
#Get a list of all pids for python3 processes
python_pids = get_pid('python3')
#Get a list of all pids for processes with "main.py" argument
main_py_pids = list(map(int,subp.check_output(["pgrep", "-f", "main.py"]).split()))
python_main_py_pid = set(python_pids).intersection(main_py_pids)
print(python_pids)
print(main_py_pids)
print(python_main_py_pid)
Result with 3 running python processes (including the one from this script) and one "sudo nano main.py" process:
结果有 3 个正在运行的 python 进程（包括这个脚本中的一个）和一个“sudo nano main.py”进程：
Python pids: [3032, 2329, 1698]
main.py pids: [1698, 3031]
Interesection: {1698}
