diff --git a/sh/main.sh b/sh/main.sh
index 6b1605d..eb938e8 100755
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -131,13 +131,11 @@ rwx_main() {
 	fi
 	# user root
 	rwx_source "${RWX_SELF_USER}"
-	#
-	local argument
-	argument="$(echo "${0}" | sed "s|^-||")"
-	case "${argument}" in
-	"bash" | \
-		"dash" | \
-		"sh")
+	# context / command
+	if [ -n "${RWX_COMMAND_NAME}" ]; then
+		"${RWX_SELF_COMMAND}${RWX_COMMAND_NAME}" "${@}"
+	# context / shell
+	else
 		# run interactive extras
 		if rwx_shell_interactive; then
 			# check format
@@ -150,14 +148,7 @@ rwx_main() {
 			rwx_log
 			rwx_self_help
 		fi
-		;;
-	*)
-		local function name
-		name="$(basename "${argument}")"
-		function="${RWX_SELF_COMMAND}${name}"
-		"${function}" "${@}"
-		;;
-	esac
+	fi
 }
 
 # run main function