Monitor Process Creation and Quiting

proc_diff.py

import os
import commands
import time

def get_process():
    procs = set()
    for line in commands.getoutput("ps aux").split('\n'):
        if not line: # or '%CPU' in line:
            continue
        proc = ' '.join(line.split()[10:])
        procs.add(proc)

    return procs

def run_procs_diff():
    last = get_process()
    while True:
        time.sleep(0.5)
        now = get_process()
        for p in last.difference(now):
            print "Q", p
        for p in now.difference(last):
            print "C", p
        last = now


if __name__ == '__main__':
    run_procs_diff()