diff --git a/sh/main.sh b/sh/main.sh
index 61637fb..7da2446 100644
--- a/sh/main.sh
+++ b/sh/main.sh
@@ -24,6 +24,21 @@ sh_source_check() {
 	rm "${file}"
 }
 
+sh_source_find() {
+	local root="${1}"
+	local file="${2}"
+	set -- \
+		"${root}" \
+		-name "*.sh" \
+		-type "f"
+	[ -n "${file}" ] &&
+		set -- "${@}" \
+			-not \
+			-name "${file}"
+	find "${@}" \
+		-printf "%P\n"
+}
+
 _sh_main_commands() {
 	local file="${1}"
 	grep "()" "${file}" |