ask_yn fixed

spells/cantrips/ask_yn

@@ -1,21 +1,24 @@
-#!/bin/bash
+#!/bin/sh
 
 question=$1
-default_answer=$2
+default_answer=$(echo $2 | tr a-z A-Z)
 
 # Capitalize the default answer and construct the prompt
-if [[ $default_answer == "Y" ]]; then
+if [ "$default_answer" = "Y" ]; then
     prompt="${question} (Y/n)? "
 else
     prompt="${question} (y/N)? "
 fi
 
+# Handle Ctrl-C
+trap "printf '\n'; exit 2" 2
+
 # Use stty to make read command work for single character input
 old_stty_cfg=$(stty -g)
 stty raw -echo
 printf "%s" "$prompt"
 answer=$( while ! head -c 1 | grep -i '[yn]'; do true; done )
-stty $old_stty_cfg
+stty "$old_stty_cfg"
 
 # If no answer is given, use the default answer
 if [ -z "$answer" ]; then
@@ -24,8 +27,8 @@ fi
 
 # Print the answer and return appropriate exit code
 printf "%s\n" "$answer"
-if [[ $answer == "Y" || $answer == "y" ]]; then
+if [ "$answer" = "Y" -o "$answer" = "y" ]; then
     exit 0
 else
     exit 1
-fi
+fi