Regarding Telnet library in python

[Hishaam]

Hi,

In python documentation, i found a telnet example as follows:

-------------------------------------------------------------------------
import getpass
import sys
import telnetlib

HOST = "localhost"
user = raw_input("Ente r your remote account: ")
password = getpass.getpass ()

tn = telnetlib.Telne t(HOST)

tn.read_until(" login: ")
tn.write(user + "\n")
if password:
tn.read_until(" Password: ")
tn.write(passwo rd + "\n")

tn.write("ls\n" )
tn.write("exit\ n")

print tn.read_all()
-------------------------------------------------------------------------

The ouput of it as follows:

-------------------------------------------------------------------------
Enter your remote account: root

Last login: Mon Aug 13 11:54:32 from pcp246879pcs.ca
Sun Microsystems Inc. SunOS 5.10 Generic January 2005
# Desktop boot hishaam net system work
Documents cdrom home opt tfile2 zonemgr
File.txt dev kernel platform tmp
QA_tmp devices lib proc usr
acunix etc lost+found sbin var
bin export mnt sfile vol
#

-------------------------------------------------------------------------

The difficulty i find in this is th code line "print tn.read_all()" is
used for reading all of the output of the code at once.

Is there a possibility to read the stdout of each command by command
like -

# ls
<stdout 1>
[capture <stdout 1in a variable]
# cd /root
<stdout 2>
[capture <stdout 2in a variable]


Like the above would be useful if there are a large number of commands
to be executed in the telnet session.

Can anyone help on this?

Regards,
Hishaam

[Eddie Corns]

Re: Regarding Telnet library in python

Hishaam <hishaam.ab@gma il.comwrites:

>Hi,

>In python documentation, i found a telnet example as follows:

>-------------------------------------------------------------------------
>import getpass
>import sys
>import telnetlib

>HOST = "localhost"
>user = raw_input("Ente r your remote account: ")
>password = getpass.getpass ()

>tn = telnetlib.Telne t(HOST)

>tn.read_until( "login: ")
>tn.write(use r + "\n")
>if password:
tn.read_until(" Password: ")
tn.write(passwo rd + "\n")

>tn.write("ls\n ")
>tn.write("exit \n")

>print tn.read_all()
>-------------------------------------------------------------------------

>The ouput of it as follows:

>-------------------------------------------------------------------------
>Enter your remote account: root

>Last login: Mon Aug 13 11:54:32 from pcp246879pcs.ca
>Sun Microsystems Inc. SunOS 5.10 Generic January 2005
># Desktop boot hishaam net system work
>Documents cdrom home opt tfile2 zonemgr
>File.txt dev kernel platform tmp
>QA_tmp devices lib proc usr
>acunix etc lost+found sbin var
>bin export mnt sfile vol
>#

>-------------------------------------------------------------------------

>The difficulty i find in this is th code line "print tn.read_all()" is
>used for reading all of the output of the code at once.

>Is there a possibility to read the stdout of each command by command
>like -

># ls
><stdout 1>
>[capture <stdout 1in a variable]
># cd /root
><stdout 2>
>[capture <stdout 2in a variable]

>Like the above would be useful if there are a large number of commands
>to be executed in the telnet session.

>Can anyone help on this?

>Regards,
>Hishaam

One way of doing this is to send the commands one at a time and do: (untested)

prompt = '\n# '

tn.write("ls\n" )
stdout = tn.read_until(p rompt)
for line in stdout.splitlin es():
...
etc.

alternatively just send them all in one go as you have been and save the
output in a variable and split that on the prompt. In either case you may
want to change the prompt to something easier to match on like "$hostname# ".

Eddie