nss/XXX-lookup.c

   1 /* Copyright (C) 1996 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 Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 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 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18 Boston, MA 02111-1307, USA.  */
  19
  20 #include "nsswitch.h"
  21
  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, servicess, ...)                   *|
  27 |*                                                                 *|
  28 \*******************************************************************/
  29
  30 #define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup)
  31 #define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post)
  32 #define CONCAT3_2(Pre, Name, Post) Pre##Name##Post
  33
  34 #define DATABASE_NAME_STRING STRINGIFY1 (DATABASE_NAME)
  35 #define STRINGIFY1(Name) STRINGIFY2 (Name)
  36 #define STRINGIFY2(Name) #Name
  37
  38
  39 static service_user *database = NULL;
  40
  41 int
  42 DB_LOOKUP_FCT (service_user **ni, const char *fct_name, void **fctp)
  43 {
  44   if (database == NULL
  45       && __nss_database_lookup (DATABASE_NAME_STRING, &database) < 0)
  46     return -1;
  47
  48   *ni = database;
  49
  50   return __nss_lookup (ni, fct_name, fctp);
  51 }