Using Expect for the first time


 
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Old 11-02-2018
Using Expect for the first time

Hi All,

Using Linux server 18.04

Trying to understand EXPECT, so I created a script to add in new users.

The code below works without expect, and I can manually change the passwords for the new users.
However, if I use EXPECT (which is installed) to set passwords it creates the users but no passwords.

Both scripts are executable.

Code:
#!/bin/bash
#
# TP = a file with 3 usernames testa, testb & testc
# EXPECT is the expect script
TP=/home/user/test.txt
EXPECT=/home/user/exp.sh
ID=9050

while read PERSON
do
    useradd -m -d /home/$PERSON -g 1005 -u $ID -c "Test User" -s /bin/bash $PERSON
    $EXPECT
    passwd -f $PERSON
    ID=$((ID + 1))
done < "$TP"

Expect Script
Code:
#!/usr/bin/expect -f
#
# this expect script is used to set new users passwords
# the password will be forced to expire immediately after 
#
set timeout -1
spawn $env(SHELL)
expect -exact "Enter new UNIX password: "
send -- "letmein\r"
expect -exact "Retype new UNIX password: "
send -- "letmein\r"
expect eof

Output
Code:
# ./test_users.sh
": no such file or directory
passwd: password expiry information changed.
": no such file or directory
passwd: password expiry information changed.
": no such file or directory
passwd: password expiry information changed.

I take it this is something to do with expect, maybe I have not understood it correctly, maybe I am picking the wrong spawn... I am not sure, as I have never used it before, but what I have read seems I have most of it correct.

Could someone point me in the right direction?
 
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