run command in custom shell instance inside bash script

Question

I have a script: script

#!/bin/bash
read -n password
if [[ $password = $correct-password ]]; then
custom shell
else
exit
fi

Then, I have another script:

#!/bin/bash
echo password | ./script
commands

I want the commands in the second script to run in my custom shell not bash but they just run in bash. I can't do any changes in my first script. Instead of echo I have tried redirect password from file and here document "<<" still yeilds the same result.

It is a little unclear as to what you are asking ... Instead of echo password | ./script which just runs this script as a stand alone, you want to pass in arguments .. Is that what you are asking? — Zak
– Zak, Commented Sep 4, 2019 at 15:32
The if statement in the first script is not valid syntax. (( should be [[. — Barmar
– Barmar, Commented Sep 4, 2019 at 15:32

Barmar · Accepted Answer · 2019-09-04 15:33:16Z

1

Use a here-doc, and put the password on the first line.

./script <<EOF
password
commands
EOF

When you use a pipe, the standard input of the script just comes from the pipe; anything after that line will be commands to the original shell once ./script exits.

answered Sep 4, 2019 at 15:33

Barmar

789k57 gold badges555 silver badges669 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

run command in custom shell instance inside bash script

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related