#! /usr/bin/env python3
# License: Public Domain

import os
import time

os.chdir('/proc')

next_data = set()

while True:
    last_data, next_data = next_data, set()

    for proc in os.listdir():
        try:
            int(proc)
        except ValueError:
            continue

        try:
            f = open(os.path.join(proc, 'stat'), 'rb')
        except OSError:
            continue

        with f:
            data = f.read().split(b' ')
        if data[2] == b'D':
            try:
                with open(os.path.join(proc, 'cmdline'), 'rb') as f:
                    cmdline = repr(f.read().rstrip(b'\x00').split(b'\x00'))
            except OSError:
                cmdline = '(Unknown)'

            v = proc, cmdline
            next_data.add(v)

            if v in last_data:
                print('PID %s: %s' % v)

    time.sleep(10)