bash: $-

$- expands to the arguments that bash was executed with.

interactive.bash

Interactive Session


#!/usr/local/bin/bash

echo "$-"

case "$-" in
  *i*)
    echo "Interactive shell";;
  *)
    echo "Non-Interactive shell";;
esac


bash#
bash#
bash# . ./interactive.bash
himBH
Interactive shell
bash#
bash# ./interactive.bash
hB
Non-Interactive shell
bash#
bash#

Roger Hall
COMPUSPEC