1/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include "nsswitch.h"
20
21/*******************************************************************\
22|* Here we assume one symbol to be defined: *|
23|* *|
24|* DATABASE_NAME - name of the database the function accesses *|
25|* (e.g., hosts, services, ...) *|
26|* *|
27|* One additional symbol may optionally be defined: *|
28|* *|
29|* ALTERNATE_NAME - name of another service which is examined in *|
30|* case DATABASE_NAME is not found *|
31|* *|
32|* DEFAULT_CONFIG - string for default conf (e.g. "dns files") *|
33|* *|
34\*******************************************************************/
35
36#define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup2)
37#define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post)
38#define CONCAT3_2(Pre, Name, Post) Pre##Name##Post
39
40#define DATABASE_NAME_SYMBOL CONCAT3_1 (__nss_, DATABASE_NAME, _database)
41#define DATABASE_NAME_STRING STRINGIFY1 (DATABASE_NAME)
42#define STRINGIFY1(Name) STRINGIFY2 (Name)
43#define STRINGIFY2(Name) #Name
44
45#ifdef ALTERNATE_NAME
46#define ALTERNATE_NAME_STRING STRINGIFY1 (ALTERNATE_NAME)
47#else
48#define ALTERNATE_NAME_STRING NULL
49#endif
50
51#ifndef DEFAULT_CONFIG
52#define DEFAULT_CONFIG NULL
53#endif
54
55int
56DB_LOOKUP_FCT (service_user **ni, const char *fct_name, const char *fct2_name,
57 void **fctp)
58{
59 if (DATABASE_NAME_SYMBOL == NULL
60 && __nss_database_lookup2 (DATABASE_NAME_STRING, ALTERNATE_NAME_STRING,
61 DEFAULT_CONFIG, &DATABASE_NAME_SYMBOL) < 0)
62 return -1;
63
64 *ni = DATABASE_NAME_SYMBOL;
65
66 return __nss_lookup (ni, fct_name, fct2_name, fctp);
67}
68libc_hidden_def (DB_LOOKUP_FCT)
69