__nss_files_XY_hostbyname
res = __nss_files_XY_hostbyname(be, argp, argp->key.name, AF_INET);
nss_status_t __nss_files_XY_hostbyname();
extern nss_status_t __nss_files_XY_hostbyname();
res = __nss_files_XY_hostbyname(be, argp, argp->key.ipnode.name,