Update.
[glibc.git] / nss / XXX-lookup.c
blobda0e6f4510dbdaa763aeed7d8b013c53da0a3cc9
1 /* Copyright (C) 1996, 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #include "nsswitch.h"
22 /*******************************************************************\
23 |* Here we assume one symbol to be defined: *|
24 |* *|
25 |* DATABASE_NAME - name of the database the function accesses *|
26 |* (e.g., hosts, services, ...) *|
27 |* *|
28 |* One additional symbol may optionally be defined: *|
29 |* *|
30 |* ALTERNATE_NAME - name of another service which is examined in *|
31 |* case DATABASE_NAME is not found *|
32 |* *|
33 |* DEFAULT_CONFIG - string for default conf (e.g. "dns files") *|
34 |* *|
35 \*******************************************************************/
37 #define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup)
38 #define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post)
39 #define CONCAT3_2(Pre, Name, Post) Pre##Name##Post
41 #define DATABASE_NAME_SYMBOL CONCAT3_1 (__nss_, DATABASE_NAME, _database)
42 #define DATABASE_NAME_STRING STRINGIFY1 (DATABASE_NAME)
43 #define STRINGIFY1(Name) STRINGIFY2 (Name)
44 #define STRINGIFY2(Name) #Name
46 #ifdef ALTERNATE_NAME
47 #define ALTERNATE_NAME_STRING STRINGIFY1 (ALTERNATE_NAME)
48 #else
49 #define ALTERNATE_NAME_STRING NULL
50 #endif
52 #ifndef DEFAULT_CONFIG
53 #define DEFAULT_CONFIG NULL
54 #endif
56 service_user *DATABASE_NAME_SYMBOL attribute_hidden;
58 extern int DB_LOOKUP_FCT (service_user **ni, const char *fct_name,
59 void **fctp) internal_function;
60 libc_hidden_proto (DB_LOOKUP_FCT)
62 int
63 internal_function
64 DB_LOOKUP_FCT (service_user **ni, const char *fct_name, void **fctp)
66 if (DATABASE_NAME_SYMBOL == NULL
67 && __nss_database_lookup (DATABASE_NAME_STRING, ALTERNATE_NAME_STRING,
68 DEFAULT_CONFIG, &DATABASE_NAME_SYMBOL) < 0)
69 return -1;
71 *ni = DATABASE_NAME_SYMBOL;
73 return __nss_lookup (ni, fct_name, fctp);
75 libc_hidden_def (DB_LOOKUP_FCT)