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How to pass variables from shell script to expected script?

I have a shell script as shown below:

#!/bin/bash

echo "Select the Gateway Server:"
echo "   1. Gateway 1"
echo "   2. Gateway 2"
echo "   3. Gateway 3"

read gatewayHost

case $gatewayHost in
    1) gateway="abc.com" ;;
    2) gateway="pqr.com" ;;
    3) gateway="xyz.com" ;;
    *) echo "Invalid choice" ;;
esac

/mypath/abc

In the above script, I select the gateway from user input and try to navigate to my abc.sh script, which is expected to be shown below:

#!/usr/bin/expect

set timeout 3
spawn ssh "james@$gateway"
expect "password:"
send "TSfdsHhtfs\r";
interact

But I can not pass the gateway variable from the shell script to expect a script. Can someone tell me how to achieve this? Please note that I need to use the shell script only for outdated reasons (cannot use tcl script or cannot do everything while waiting for the script)

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1 answer

From your shell script:

/mypath/abc $gateway

From your expected script:

#!/usr/bin/expect

set gateway [lindex $argv 0]; # Grab the first command line parameter

set timeout 3
spawn ssh "james@$gateway"
expect "password:"
send "TSfdsHhtfs\r";
interact
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