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#!/usr/bin/python

import errno

import fcntl

import os

import random

import re

import signal

import socket

import sys

import threading

import time

def daemonize():

"""Performs the necessary dance to become a background daemon."""

if os.fork():

os._exit(0)

os.chdir("/")

os.umask(022)

os.setsid()

os.umask(0)

if os.fork():

os._exit(0)

stdin = open(os.devnull)

stdout = open(os.devnull, 'w')

os.dup2(stdin.fileno(), 0)

os.dup2(stdout.fileno(), 1)

os.dup2(stdout.fileno(), 2)

stdin.close()

stdout.close()

for fd in xrange(3, 1024):

try:

os.close(fd)

except OSError: # This FD wasn't opened...

pass # ... ignore the exception.

if __name__ == '__main__':

daemonize()