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Full Discussion: Expect script to automate telnet session
Top Forums Shell Programming and Scripting Expect script to automate telnet session Post 302452611 by abxccd on Sunday 12th of September 2010 01:47:33 AM
Old 09-12-2010
Expect script to automate telnet session
Hi all,

I am currently running a daemon which creates a virtual terminal for testing purposes. Essentially, if I were to interact with it manually, this is what I get.

Code:
 
john@test1:~$telnet localhost 7777
Trying ::1...
Connected to localhost.
Escape character is '^]'
mip6d> pl
eth2 2001:a:b:2:3:4:5:10/64
  valid 86400 / 86400 preferred
mip6d>

I would like to write a script that runs those commands for me and outputs the result to the shell. So by running the script, I should see the following in my terminal window:

Code:
 
eth2 2001:a:b:2:3:4:5:10/64
  valid 86400 / 86400 preferred

I have written a script, but it isn't exactly doing what I want.

Code:
 
#!/usr/bin/expect
spawn telnet localhost 7777
expect "mip6d>"
send "pl\r"

Unfortunately, the result i get is:
Code:
john@test1:~$ ./test.sh
spawn telnet localhost 7777
Trying ::1...
Connected to localhost.
Escape character is '^]'.
mip6d>

The scripts then terminate. Can anyone give me a hand to get this working?

Thank you!
 

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LEARN ABOUT SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)
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