diff --git a/sup b/sup
index fe2cb5f..ecd4687 100755
--- a/sup
+++ b/sup
@@ -93,26 +93,36 @@ sup.mktemp() {
 }
 
 sup.getopt() {
-	local keys
+	while (( $# )); do
+		unset -v arg opt c keys
 
-	for i in "$@"; do
-		case "$i" in
-			--*) echo "$i";;
+		case "$1" in
+			(--) printf '%s\n' '--'; break;;
 
-			-*)
-				keys=( $(echo "${i##*-}" | fold -w1) )
+			(--*)
+				IFS='=' read arg opt <<< "$1"
+				printf '%s\n' "$arg"
 
-				if [[ "${#keys[@]}" -gt 1 ]]; then
-					for k in "${keys[@]}"; do
-						echo "-${k}"
-					done
-				else
-					echo "$i"
-				fi
+				[[ "$opt" ]] && {
+					printf '%s\n' "$opt"
+				}
 			;;
 
-			*) echo "$i";;
+			(-*)
+				while read -n1 c
+				do
+					case "$c" in
+						-|'') :;;
+						*) keys+=( "-$c" );;
+					esac
+				done <<< "$1"
+
+				printf '%s\n' "${keys[@]}"
+			;;
+
+			(*) printf '%s\n' "$1";;
 		esac
+		shift
 	done
 }