gistfile1.txt

import sys
import subprocess

def get_children(pid):
    if (len(pid)==0) or pid is None:
        return
    child_pid_procfs="/proc/" + pid + "/task/" + pid + "/children" 
    out = subprocess.Popen(['cat', child_pid_procfs],
           stdout=subprocess.PIPE,
           stderr=subprocess.PIPE)
    childstr,err=out.communicate()
    childlist=childstr.rstrip().split(" ")
    if len(childlist[0])==0:
        return None
    return childlist

def enum_proc(pidlist):
    if pidlist is None or (len(pidlist))==0:
        return
    for pid in pidlist:
            childlist=get_children(pid)
            if childlist is None:
                continue
            print(childlist)
	    enum_proc(childlist)

pid=sys.argv[1]
childlist=get_children(pid)
print(childlist)
enum_proc(childlist)