+extern int __nss_next (service_user **ni, const char *fct_name, void **fctp,
+ int status, int all_values);
+extern int __nss_database_lookup (const char *database,
+ const char *alternative_name,
+ const char *defconfig, service_user **ni);
+extern void *__nss_lookup_function (service_user *ni, const char *fct_name);