simplify the input_box function

setup/functions.sh

@@ -134,21 +134,11 @@ function message_box {
 }
 
 function input_box {
-	TMP=`mktemp`
-	dialog --title "$1" --inputbox "$2" 0 0 "$3" 2>$TMP
-
-	respose=$?
-
-	case $respose in
-		0)
-			result=$(<$TMP)
-			;;
-		1)
-			exit
-			;;
-		255)
-			exit
-	esac
-
-	rm $TMP
+	# input_box "title" "prompt" "defaultvalue" VARIABLE
+	# The user's input will be stored in the variable VARIABLE.
+	# The exit code from dialog will be stored in VARIABLE_EXITCODE.
+	declare -n result=$4
+	declare -n result_code=$4_EXITCODE
+	result=$(dialog --stdout --title "$1" --inputbox "$2" 0 0 "$3")
+	result_code=$?
 }