telnet to other system and do some job automatically....

visitnag · 04-22-2009, 07:09 PM

Hi all,

I want a solution for automatic telnet. I want to get a file from other system after doing some operation on the file. Suppose i want to cut some characters and zip it.. from that particular file and get that cutfile.bz2. I can get the file with ftp with automatic process..but i dont want the whole file. How to do? The other system may not allow ssh. Help me....

TB0ne · 04-22-2009, 09:34 PM

Quote:

Originally Posted by visitnag

Hi all,

I want a solution for automatic telnet. I want to get a file from other system after doing some operation on the file. Suppose i want to cut some characters and zip it.. from that particular file and get that cutfile.bz2. I can get the file with ftp with automatic process..but i dont want the whole file. How to do? The other system may not allow ssh. Help me....

"How to do"?? Write a program to do it. Either do it in bash, using "expect", or do it in Perl, using CPAN telnet modules.

Once you connect, you'll have to parse the STDIN input, and act on it accordingly....what have you written so far?

jisjis · 04-23-2009, 05:07 AM

Quote:

Originally Posted by visitnag

Hi all,

I want a solution for automatic telnet. I want to get a file from other system after doing some operation on the file. Suppose i want to cut some characters and zip it.. from that particular file and get that cutfile.bz2. I can get the file with ftp with automatic process..but i dont want the whole file. How to do? The other system may not allow ssh. Help me....

Write an application (using Java/C++/etc) to do the business logic bit (cutting and zipping files) and then invoke a shell script to do the FTP'ing bit.

Voila!

Linux

vikas027 · 04-23-2009, 06:27 AM

Hi,

You can expect for this.

For eg. you have a file called telnet.sh and other file login

Code:

#!/usr/bin/expect -f
set host [lindex $argv 0]
set rcfile [open $host r ]
gets $rcfile user
gets $rcfile pass
spawn telnet "$host"
expect "login:"
send "$user\r"
expect "word:"
send "$pass\r"
interact

Login file contains

Code:

root
Password123 (you password)

Now,

Code:

telnet.sh login
run your commands here

Also, I request moderators to move this thread to Programming.