io: path: add b_path_duplicate()

io/sys/darwin/path.c

@@ -120,6 +120,22 @@ struct b_path *b_path_create_from_cstr(const char *cstr)
 	return path;
 }
 
+struct b_path *b_path_duplicate(const struct b_path *path)
+{
+	struct b_path *new_path = b_path_create();
+	if (!path) {
+		return NULL;
+	}
+
+	new_path->pathstr = b_string_duplicate(path->pathstr);
+	if (!new_path->pathstr) {
+		b_path_release(new_path);
+		return NULL;
+	}
+
+	return new_path;
+}
+
 static void append_path(struct b_path *dest, const struct b_path *src)
 {
 	if (b_path_is_absolute(src)) {