How to access environment variables in an Expect script?

Question

I would like to access the PATH environment variable inside an expect script.

How can I achieve that ?

My actual script is :

#!/usr/bin/expect set timeout 300 send "echo $PATH\r" 

and its ouput is :

can't read "PATH": no such variable     while executing "send "echo $PATH\r"" 

Answer 1

Expect is an extension of Tcl. Tcl access enviroment variables via the global env array:

send_user "$env(PATH)\n" 

Answer 2

You can use the global env array by using:

$::env(PATH)     

This notion will also work inside procedures.