telnetlib

[Bengt Richter]

On Fri, 10 Jan 2003 09:11:55 -0600, "Dickerson, Dee" <Dickerson4 at dow.com> wrote:

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>Below is telnet code that I am trying to get going.  I am going from a Windows2000 machine to a Redhat Linux machine; the ls command will not run as I can tell; it does not return any output.
> 
>I need to be able to execute other commands such as ps with options such as
> 
>ps -eda -format pid,command |grep legion-server,,,,, etc|
> 
>I would appreciate any help that anyone could offer.
> 
> 
>import telnetlib
>import sys
>from hostlistdee import hostlistdee
> 
>user='legion'
>pw='*******'
> 
>for host in hostlistdee:
>   try:
>      tn=telnetlib.Telnet(host)
>      tn.read_until("login: ")
>      tn.write(user+'\n') 
>      tn.read_until('Password: ')
>      tn.write(pw+'\n')
>      tn.write('ls\n')
>      tn.write('exit\n')
>      tn.read_all()
>      tn.close()
>      print 'started ',host
>   except:
>      print 'failed ',host
>   # end try
># end def
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First, can you telnet manually to the first host using exactly the sequence
of data transfer above?

Second, if tn.read_all() returns some data, what are you doing with it?
What happens if you put "print tn.read_all()" ?

I don't know if you might have to do some reading of responses before
sending additional commands, but it might not be safe to assume there
are no buffering limits anywhere in your session activity. Of course,
for that you wouldn't want to use a read that would hang until the other
side closes the connection.

Regards,
Bengt Richter