1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/* Copyright (C) 1996-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include "nsswitch.h"
/*******************************************************************\
|* Here we assume one symbol to be defined: *|
|* *|
|* DATABASE_NAME - name of the database the function accesses *|
|* (e.g., hosts, services, ...) *|
|* *|
|* One additional symbol may optionally be defined: *|
|* *|
|* ALTERNATE_NAME - name of another service which is examined in *|
|* case DATABASE_NAME is not found *|
|* *|
|* DEFAULT_CONFIG - string for default conf (e.g. "dns files") *|
|* *|
\*******************************************************************/
#define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup2)
#define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post)
#define CONCAT3_2(Pre, Name, Post) Pre##Name##Post
#define DATABASE_NAME_SYMBOL CONCAT3_1 (__nss_, DATABASE_NAME, _database)
#define DATABASE_NAME_STRING STRINGIFY1 (DATABASE_NAME)
#define STRINGIFY1(Name) STRINGIFY2 (Name)
#define STRINGIFY2(Name) #Name
#ifdef ALTERNATE_NAME
#define ALTERNATE_NAME_STRING STRINGIFY1 (ALTERNATE_NAME)
#else
#define ALTERNATE_NAME_STRING NULL
#endif
#ifndef DEFAULT_CONFIG
#define DEFAULT_CONFIG NULL
#endif
int
DB_LOOKUP_FCT (service_user **ni, const char *fct_name, const char *fct2_name,
void **fctp)
{
if (DATABASE_NAME_SYMBOL == NULL
&& __nss_database_lookup2 (DATABASE_NAME_STRING, ALTERNATE_NAME_STRING,
DEFAULT_CONFIG, &DATABASE_NAME_SYMBOL) < 0)
return -1;
*ni = DATABASE_NAME_SYMBOL;
return __nss_lookup (ni, fct_name, fct2_name, fctp);
}
libc_hidden_def (DB_LOOKUP_FCT)
|
