import socket
import os
import sys


def child():
   print('\nA new child', os.getpid())
   os._exit(0)

def parent():
    #while True:
        newpid = os.fork()
        if newpid == 0:
            child()
        else:
            pids = (os.getpid(), newpid)
            print("parent: %d, child: %d\n" %pids)
            #reply = input("q for quit /c for new fork")
        #if reply == 'c':
            #continue
        #elif reply == 'q':
            #break



HOST = ''	# Symbolic name, meaning all available interfaces
PORT = 20	# Arbitrary non-privileged port

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print('Socket created')

#Bind socket to local host and port
try:
    s.bind((HOST, PORT))
except socket.error as msg:
    print('Bind failed. Error Code : ' + str(msg[0]) + ' Message ' + msg[1])
    sys.exit()

print('Socket bind complete')


#Start listening on socket
s.listen(5)
print('Socket now listening')

#now keep talking with the client
while 1:
    #wait to accept a connection - blocking call
    conn, addr = s.accept()
    parent()
    print('Connected with '  + ':' + str(addr[1]))
    buffer='\nWelcome in NetTris v 0.1  by sp4   2017\n'
    conn.send(buffer)
    #buffer = conn.recv(1024)
s.close()