#!/usr/bin/python

import select
import socket
import sys

def serve(ports):
  listeners, sockets = [], []
  for port in ports:
    listener = socket.socket()
    listener.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    listener.bind(('127.0.0.1', port))
    listener.setblocking(False)
    listener.listen(5)
    listeners.append(listener)
    sockets.append(listener)
    print(listener.getsockname(), ' listening')
  while True:
    r, w, x = select.select(sockets, sockets, sockets)
    for sock in r:
      if sock in listeners:
        c, a = sock.accept()
        print(sock.getsockname(), ' <- ', a)
        sockets.append(c)
      else:
        buf = sock.recv(80)
        if not buf:
          print(sock.getpeername(), ' EOF')
          sockets.remove(sock)
        else:
          print(sock.getpeername(), ' <- ', buf)
    for sock in w:
      pass
    for sock in x:
      print(sock.getpeername(), ' error')
      sockets.remove(sock)

if __name__ == '__main__':
  serve(int(arg) for arg in sys.argv[1:])