+bool valid_user_group_name_full(const char *u, bool strict);
+bool valid_user_group_name_or_id_full(const char *u, bool strict);
+static inline bool valid_user_group_name(const char *u) {
+ return valid_user_group_name_full(u, true);
+}
+static inline bool valid_user_group_name_or_id(const char *u) {
+ return valid_user_group_name_or_id_full(u, true);
+}
+static inline bool valid_user_group_name_compat(const char *u) {
+ return valid_user_group_name_full(u, false);
+}
+static inline bool valid_user_group_name_or_id_compat(const char *u) {
+ return valid_user_group_name_or_id_full(u, false);
+}