libc {
  GLIBC_2.0 {
     # functions used in other libraries
    __nss_passwd_lookup; __nss_group_lookup; __nss_hosts_lookup; __nss_next;
    __nss_database_lookup; __nss_configure_lookup;
  }
  GLIBC_2.2.2 {
    __nss_hostname_digits_dots;
  }
  GLIBC_PRIVATE {
    _nss_files_parse_grent; _nss_files_parse_pwent; _nss_files_parse_spent;
    __nss_disable_nscd; __nss_lookup_function; _nss_files_parse_sgent;

    __nss_passwd_lookup2; __nss_group_lookup2; __nss_hosts_lookup2;
    __nss_services_lookup2; __nss_next2;
  }
}

libnss_files {
  GLIBC_PRIVATE {
    _nss_files_setaliasent;
    _nss_files_endaliasent;
    _nss_files_getaliasbyname_r;
    _nss_files_getaliasent_r;

    _nss_files_setetherent;
    _nss_files_endetherent;
    _nss_files_getetherent_r;
    _nss_files_parse_etherent;

    _nss_files_setgrent;
    _nss_files_endgrent;
    _nss_files_getgrent_r;
    _nss_files_getgrgid_r;
    _nss_files_getgrnam_r;

    _nss_files_sethostent;
    _nss_files_endhostent;
    _nss_files_gethostbyaddr_r;
    _nss_files_gethostbyname2_r;
    _nss_files_gethostbyname4_r;
    _nss_files_gethostbyname_r;
    _nss_files_gethostent_r;
    _nss_files_gethostton_r;

    _nss_files_setnetent;
    _nss_files_endnetent;
    _nss_files_getnetbyaddr_r;
    _nss_files_getnetbyname_r;
    _nss_files_getnetent_r;
    _nss_files_getntohost_r;
    _nss_files_parse_netent;

    _nss_files_setnetgrent;
    _nss_files_endnetgrent;
    _nss_files_getnetgrent_r;

    _nss_files_setprotoent;
    _nss_files_endprotoent;
    _nss_files_getprotobyname_r;
    _nss_files_getprotobynumber_r;
    _nss_files_getprotoent_r;
    _nss_files_parse_protoent;

    _nss_files_setpwent;
    _nss_files_endpwent;
    _nss_files_getpwent_r;
    _nss_files_getpwnam_r;
    _nss_files_getpwuid_r;

    _nss_files_setrpcent;
    _nss_files_endrpcent;
    _nss_files_getrpcbyname_r;
    _nss_files_getrpcbynumber_r;
    _nss_files_getrpcent_r;
    _nss_files_parse_rpcent;

    _nss_files_setservent;
    _nss_files_endservent;
    _nss_files_getservbyname_r;
    _nss_files_getservbyport_r;
    _nss_files_getservent_r;
    _nss_files_parse_servent;

    _nss_files_setspent;
    _nss_files_endspent;
    _nss_files_getspent_r;
    _nss_files_getspnam_r;

    _nss_files_setsgent;
    _nss_files_endsgent;
    _nss_files_getsgent_r;
    _nss_files_getsgnam_r;

    _nss_netgroup_parseline;
    _nss_files_getpublickey;
    _nss_files_getsecretkey;
  }
}