lextoumbourou

> python fork_wait.py
Hope my parent doesn't forget me this time!
Right now, my parent is 20037
Right now, my parent is 20037
Right now, my parent is 20037
My child has finished processing. My work here is done.

lextoumbourou

from os import fork, getppid, wait
from sys import exit
from time import sleep

pid = fork()

if pid == 0:
    exit("Goodbye, cruel world")
else:
    print "I created a child:", pid

lextoumbourou

> python fork_zombie.py
I created a child and now all I want to do is sleep…
Goodbye cruel world!

lextoumbourou

> ps -ef | grep 26556
lex      26556 26555  0 21:40 pts/3    00:00:00 [python] <defunct>

lextoumbourou

^CTraceback (most recent call last):
  File "fork.py", line 11, in 
    time.sleep(1)
KeyboardInterrupt

lextoumbourou

> ps -e | grep 27439
>

lextoumbourou

- hosts: all
  sudo: yes
  vars:
      cap_file: packet_capture_{{ ansible_hostname }}_{{ ansible_date_time['epoch'] }}.cap

lextoumbourou

 tasks:
    - name: start tcpdump
      command: /usr/sbin/tcpdump -i eth0 -s 0 -w /tmp/${cap_file}
      async: 60
      poll: 0

lextoumbourou

    - pause: minutes=1 prompt="pause for 60 seconds or press Ctrl + c then c to continue"

lextoumbourou

    - name: kill tcpdump
      command: /usr/bin/pkill tcpdump
      ignore_errors: yes