def shell(chan):
    import select

    oldtty = termios.tcgetattr(sys.stdin)
    try:
        tty.setraw(sys.stdin.fileno())
        tty.setcbreak(sys.stdin.fileno())
        chan.settimeout(0.0)

        while True:
            r, w, e = select.select([chan, sys.stdin], [], [])
            if chan in r:
                try:
                    x = chan.recv(1024)
                    print 'if len(x) == 0:'
                    if len(x) == 0:
                        print '\r\n*** EOF\r\n',
                        break
                    sys.stdout.write(x)
                    sys.stdout.flush()
                except socket.timeout:
                    print 'pass'
                    pass
            if sys.stdin in r:
                x = sys.stdin.read(1)
                if len(x) == 0:
                    print 'break'
                    break
                chan.send(x)

    finally:
        termios.tcsetattr(sys.stdin, termios.TCSADRAIN, oldtty)

if __name__ == '__main__':
    paramiko.util.log_to_file('psshc-interactive_shell.log')
    trn = paramiko.Transport((hostname,port))
    trn.connect(username=username, password=password)
    chn = trn.open_channel(kind='direct-tcpip', dest_addr=('h1m',22), src_addr=('hm',22))
    shell(chn)
    chn. close()