如何检查进程是否在python中运行（在Linux中）？

Question

I am trying to check if the process is running based on process name (test.py) , then exit

l = commands.getstatusoutput("ps aux |grep 'python2.7'| grep      
'test.py' | grep -v 'grep' | wc -l")

if int(l[1]) == 1:
    pid = commands.getstatusoutput("ps -ef |grep 'python2.7'|  grep 'test.py ' |awk '{print $2}'")
    print "the process 'test.py ' have running ,the pid is :"+str(pid[1])
    sys.exit(0)

else:
   print "not running"

Output:

georgetovrea@dev:/test$ python2.7  test.py 
the process 'test.py ' have running ,the pid is :26517
26542

then I try to check

 $ ps aux | grep agg_test
 georgetovrea 25181  0.0  0.0  10944   932 pts/9    S+   23:26   0:00 grep --color=auto test

the process is not running, I want to check if the process( test.py) have running ,then exit , but it's always print the process is running ,

How do I check the process have running ? Any suggestions? Thanks for any help.

Answer 1

The program runs fine for me. I guess you are running the program with python instead of python2.7 specifically.

(a) Try using python instead of python2.7 in your grep statement,then the culprit is indeed your usage of python.

(b) Change it back to python2.7 and run your program with full path to python2.7

The program:

import commands
import sys

l = commands.getstatusoutput("ps aux |grep 'python2.7'| grep 'test.py' | grep -v 'grep' | wc -l")

print(l)
if int(l[1]) == 1:
    pid = commands.getstatusoutput("ps -ef |grep 'python2.7'|  grep 'test.py ' |awk '{print $2}'")
    print "the process 'test.py ' have running ,the pid is :"+str(pid[1])
    sys.exit(0)

else:
   print "not running"

Output:

dhruv@dhruvpathak:/tmp$ /usr/bin/python2.7  test.py 

(0, '1')

the process 'test.py ' have running ,the pid is :15620