#!/usr/bin/env python3

# proctolog: new processes monitor

import os
from time import sleep

def print_pid(pid):
    try:
        with open('/proc/' + pid + '/status') as f:
            for lineno, line in enumerate(f):
                print('+ Pid: {},  {}'.format(pid, line[:-1]))
                if lineno >= 0:
                    break
    except FileNotFoundError:
        print('- Pid: ' + pid)

def foo():
    proc_list = os.listdir('/proc')
    proc_set = set()
    for i in proc_list:
        if i.isdigit() != True:
            continue
        proc_set.add(i)
    return proc_set

def bar(old_set):
    new_set = foo()
    plus = new_set - old_set
    minus = old_set - new_set
    if len(plus) > 0:
        for pid in plus:
            print_pid(pid)
    if len(minus) > 0:
        for pid in minus:
            print_pid(pid)
    return new_set

pid_set = foo()

while True:
    pid_set = bar(pid_set)
    sleep(0.1)