Expect script with ESC commands

[NotBear]

Hi,
I am trying to write an expect script to automate an interactive terminal logon. However, some of the commands I want to use on the terminal include the ESC key, eg. ESC-x, ESC-e. How can I put these ESC commands into my script, using either substitute characters or a replacement for the ESC key ?

 

[jad]

vi <file>
go to the place you want the <ESC> character and type 'i^V<ESC><ESC>'

where ^V is <cntrl>-v

meaning i <insert>
^V <literal next character>
<ESC> <insert escape char>
<ESC> finish inserting

 

[marsd]

Informational: Use exp_internal 1 to see what expect
sees, then you will easily be able to use the right
pattern for any of your keystroke shortcuts.

In your case this simple script should illustrate the point.

#!/usr/bin/expect
##escape test
#exp_internal 1
set prompt ".*@.*"
set escseq "\u001b"
set timeout 100
spawn /bin/sh

           expect {
                 -re "$prompt" {
                               send_user "Logged in..\r\n"
                               interact {
                                  -re "$escseq" {send_user "Escape detected\r\n"}
                                   "quit" {send_user "Exiting..." ; inter_return}
                               }
                 }
               eof {send_user "Shell died????\n"}
               timeout {send_user "Too much waiting on $prompt, seeya\n"}
            }

Using exp_internal 1, I identified the esc key code sent
as \u001b.
YMMV.