+// struct group
+enum nss_status _nss_cash_setgrent(int);
+enum nss_status _nss_cash_endgrent(void);
+enum nss_status _nss_cash_getgrent_r(struct group *result, char *buffer, size_t buflen, int *errnop);
+enum nss_status _nss_cash_getgrgid_r(gid_t gid, struct group *result, char *buffer, size_t buflen, int *errnop);
+enum nss_status _nss_cash_getgrnam_r(const char *name, struct group *result, char *buffer, size_t buflen, int *errnop);
+