Python Remote Login Code _python

There is a telnetlib in Python, which is to create a Telnet connection entity to the host, and then send commands to the host (like keyboard input) and receive data from that line. By using it, we can turn all the content of model 1 from "human-machine" communication to "machine-machine" communication, which can also handle the work of POP3 mailboxes. But now that we've tried POP3, this time we can try the real Telnet port 23 to do something fun.



  The following code fragment:    1 # telnetdo.py     2 #!/usr/bin/env  python     3      4 def telnetdo (HOST= None, user=none, pass=none, command=none):   #定义一个函数,  This is going to be easy to use        5   import telnetlib, sys     6       7   if   not   HOST:                              #如果没有给出所要的资料, the user is required to enter                        8       try:     9         host    = sys.argv[1]                 # Remember, the,  sequence starts with  0, and Sys.argv[0] is the name of your program      10          USER   = sys.argv[2]    11          PASS   = sys.argv[3]    12          COMMAND   = sys.argv[4]     13      except:    14          print    "usage: telnetdo.py host user pass  ' Command ' "    15         return     16     17   msg   = [' Debug    mesages:\n ']              #这个用来存起所有从主机传回的讯息,  is useful for debugging       18     19   tn   =  Telnetlib. Telnet ()                     #准备一个  telnet  Connection Entities      20   try:     21      tn.open (HOST)                               #连接端绑定到主机  HOST   Go      22   except:     23      print    "Cannot open host"      24      return    25      26  &nbSp;msg.append (Tn.expect ([' Login: '],5))          #等待主机传回含有   ' login: ' Character messages, waiting time is  5 sec      27   tn.write (user+ ' \ n ')                            #向主机送出字串  USER   +  ' \ n ', such as  USER   is      28                                                #  ' Pcheung '   is equal to   ' pcheung\n '     29   if   PASS:                                    #就像是在键盘打入一样.      30      msg.append (Tn.expect ([' Password: '],5)]    #如果有  password   If you want to call, send out the password string,     31       tn.write (pass+ ' \ n ')                        #但首先要等主机传回含有   ' Password: ' Message       32     33   msg.append (Tn.expect ([USER],5))               #因为通常登入后主机会显示出登入者名称, we find this in the host response       34                                                 #样的字符, if any, the login is successful   &nbsP;  35   tn.write (command+ ' \ n ')                        #向主机发出指令       36   msg.append (tn.expect (['% '],5))                #等  5 seconds, if the program is complete, we will receive      37                                                 # shell prompt  , assumed to be   '% '     38    tn.close ()                                     #关闭连线      39   del   tn    40    Return   msg[len (msg) -1][2]                  #把收到的讯息通通传回去.      41                                                # (Note  msg    The first  2 element is the true message,     42                                                  #其他是附加资讯.      43     44 if __name__   ==  ' __main__ '                     #这是  python   Common skills: if the  telnetdo.py  program     45                                                 #是从  command  prompt    46                                                 #引发的话则  __name__    the content is  __main__, opposite     47                                                 #如果是从别的程式用  import telnetdo   the words     48                                                 # __name__   will become   ' Telnetdo '     49    Print   telnetdo ()                            #这样写的好处是从此  telnetdo    will become your extension     50                                                 #模组, you can       in other programs 51                                                  #用telnetdo. Telnetdo (Host,user,pass,command) To call it!
This program uses the following:



The following is a code fragment:> chmod +x telnetdo.py  > telnetdo.py  ' Somehost '   ' glace '   ' xxxxxx '   ' LS&NBSP;&NBSP;&NBSP;-LF '      (0, <sre_match object    at   200f75a8>,  ' \015\012\015\012linux   (somehost) \015\012\015\ 015\012\015login:  ')    (0, <sre_match object   at    20124848>,  ' Password: ')    (0, <sre_match object   at    20103e08>,  ' \015\012yup release 2.6   somehost\015\012last login:  Wed   Mar    6 18:21:01 GMT 2002 by   Unknown@xxx.xxx.xxx.xxxyou have   mail\015\012somehost:glace% ')      total 320  -rw-r--r--    1 glace    user      &Nbsp;  139788 feb    8 17:54 pqr2.1.txt  drwxr-xr-x     3 glace    user           4096 Feb   10 16:45 mytts/  drwxr-xr-x     3 glace    user           4096 jan   29 19:03 sample/  drwxr-xr-x    2  glace    user          4096  Jan    6 16:38 tex/  drwxr-xr-x    2 glace     user          4096 Sep     5  2001 tmp/  drwxr-xr-x    2 glace     user            29 feb   23  2001  tools/  drwxr-xr-x    2 glace    user             26 feb    6 18:43  trash/  somehost:glace%   can see the results of the execution and some additional information. This is the remote execution program. Even if there is no  rsh, replicable can also.   Ha, it's very convenient. But you should be aware that the program is only waiting for  5 seconds to execute, that is, if you want to send a   ' find . -name xxx   -print ' to the host   Such a command should not wait until the execution of this  telnet session  will be closed. But think about it, does it matter? The difference between what we can do right now and the real staff  telnet  is not very large, think about how you will solve the problem of long time implementation? Yes, it's   ' nohup ' and background work.   That is, just change the program call to:  telnetdo.py  ' apocal '   ' Pcheung '   ' xxxxxx '   ' nohup    myprogram_or_script& '    on the line. This way, even if the other host's  shell prompt  is   ' > ' or   ' >>> ' does not matter.

(Note that security is not the focus of such paradigm programs, so it is not recommended for practical work.)