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The only nice way I've found is:
import sys import os try: os.kill(int(sys.argv[1]), 0) print "Running" except: print "Not running" (Source)
But is this reliable? Does it work with every process and every distribution?
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wait() return output # This is the function you can use def isThisRunning( process_name ): output = findThisProcess( process_name ) if re.search('path/of/process'+process_name, output) is None: return False else: return True # Example of how to use if isThisRunning('some_process') == False: print("Not running") else: ...
Drop a pidfile somewhere (e.g. /tmp). Then you can check to see if the process is running by checking to see if the PID in the file exists. Don't forget to delete the file when you shut down cleanly, and check for it when you start up.
You can list running processes using the ps command (ps means process status). The ps command displays your currently running processes in real-time.
Bash commands to check running process: pgrep command – Looks through the currently running bash processes on Linux and lists the process IDs (PID) on screen. pidof command – Find the process ID of a running program on Linux or Unix-like system.
Mark's answer is the way to go, after all, that's why the /proc file system is there. For something a little more copy/pasteable:
>>> import os.path >>> os.path.exists("/proc/0") False >>> os.path.exists("/proc/12") True on linux, you can look in the directory /proc/$PID to get information about that process. In fact, if the directory exists, the process is running.
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