gistfile1.txt

~  :q                                                                                                                                                                                                                                                                                                     10:50 AM
Your shell has no parents. Are you sure you want to exit? (y/n)n

maybe_exit.sh

alias :q="exit"
alias exit="maybe_exit"
function maybe_exit {
  PARENT="$(ps -o comm= $PPID)"
  ROOT="login"

  if [ $PARENT != $ROOT ]; then
    exit 0;
  else
    read "choice?Your shell has no parents. Are you sure you want to exit? (y/n)"
    case "$choice" in
      y|Y ) builtin exit 0;;
      n|N ) ;;
      * ) maybe_exit;;
    esac
  fi
}