echo $PS1 in script

Question

Silly question, but since I'm such a newbie at Linux OS, I'm having trouble to make this simple script to echo the result of PS1.

If I type echo $PS1 in bash, it shows me the result, but not in the script. It returns blank.

Example:

#!/bin/bash
ps1=$(echo $PS1) 
echo $ps1

Any tips for a begginer?

Thanks in advance.

Answer 1

Other answers are correct. If you add the -i flag to your shebang, that signals bash that it's supposed to be an interactive shell, so it will read your ~/.bashrc -- see https://www.gnu.org/software/bash/manual/bashref.html#Invoking-Bash

#!/bin/bash -i
ps1="$PS1"
echo "$ps1"

Answer 2

PS1 is a variable which is not "exported", so it is only visible within the shell, but not from any subprocess such as the script's.