Merging Expect script and Bash script

Question

This is my expect script for login into a remote server.where i ask user to put password.

#!/usr/bin/expect -f #Grabbing Password to be used in script further stty -echo send_user -- "Enter the Password: " expect_user -re "(.*)\n" send_user "\n" stty echo set pass $expect_out(1,string) #Loggin into the Gateway as Normal user #spawn ssh HOSTNAME@$ip spawn -noecho ssh -o StrictHostKeyChecking=No HOSTNAME@$ip expect "HOSTNAME@IP's password:" send "$pass\n" #Loggin in as root user send "$ROOT\r" expect -exact "Password:*" send "$pass\r" 

Now,below is my bash script to add user.

#Script to Add User chattr -i /etc/passwd read -p 'Please Enter The Username To Add: ' name echo "$name" > /tmp/userlist.txt clear echo -e "Hello $name\nYour Name Is Added To The List." userfile=/tmp/userlist.txt username=$(cat /tmp/userlist.txt | tr 'A-Z' 'a-z') for user in $username do useradd $user -N -s /bin/bash usermod -aG sudo $user passwd $user chattr +i /etc/passwd 

Now what happens is that expect script i can run from my local machine to login into the remote machine and do stuffs like checking the ram usage n all.

But to add user i want to copy the bash script on remote machine and then run the script. MY QUESTION IS HOW CAN I USE BASH SCRIPT IN EXPECT SO THAT ILL ALWAYS USE THE EXPECT TO LOGIN INTO THE REMOTE MACHINE AND RUN SCRIPTS.

Answer 1

All you need to do is send the important bash commands. Do the queries in expect:

set root_prompt {# $} ;# adjust as required send_user "Please Enter The Username To Add: " gets user send -- "useradd $user -N -s /bin/bash\r" expect -re $root_prompt send -- "usermod -aG sudo $user\r" expect -re $root_prompt send -- "passwd $user\r" expect -- { password: { send -- "$the_password\r" exp_continue } -re $root_prompt } send -- "echo 'AllowUser $user' >> /etc/ssh/ssd_config\r" expect -re $root_prompt send -- "exit\r" expect eor