check isatty in bash

Question

I want my shell to detect if human behavior, then show the prompt.

So, assume the file name is test.bash

#!/bin/bash
if [ \"x\" != \"${PS1:-x}\" ] ;t         


        

Answer 1

You could make use of the /usr/bin/tty program:

if tty -s
then
    # ...
fi

I admit that I'm not sure how portable it is, but it's at least part of GNU coreutils.