nss/getXXent.c

   1 /* Copyright (C) 1996 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 Boston, MA 02111-1307, USA.  */
  18
  19 #include "nsswitch.h"
  20
  21 /*******************************************************************\
  22 |* Here we assume several symbols to be defined:                   *|
  23 |*                                                                 *|
  24 |* LOOKUP_TYPE   - the return type of the function                 *|
  25 |*                                                                 *|
  26 |* GETFUNC_NAME  - name of the non-reentrant getXXXent function    *|
  27 |*                                                                 *|
  28 |* BUFLEN        - size of static buffer                           *|
  29 |*                                                                 *|
  30 |* Optionally the following vars can be defined:                   *|
  31 |*                                                                 *|
  32 |* NEED_H_ERRNO  - an extra parameter will be passed to point to   *|
  33 |*                 the global `h_errno' variable.                  *|
  34 |*                                                                 *|
  35 \*******************************************************************/
  36
  37 /* To make the real sources a bit prettier.  */
  38 #define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME)
  39 #define APPEND_R(name) APPEND_R1 (name)
  40 #define APPEND_R1(name) name##_r
  41
  42 /* Sometimes we need to store error codes in the `h_errno' variable.  */
  43 #ifdef NEED_H_ERRNO
  44 # define H_ERRNO_PARM , int *h_errnop
  45 # define H_ERRNO_VAR , &h_errno
  46 #else
  47 # define H_ERRNO_PARM
  48 # define H_ERRNO_VAR
  49 #endif
  50
  51 /* Prototype of the reentrant version.  */
  52 LOOKUP_TYPE *REENTRANT_GETNAME (LOOKUP_TYPE *result, char *buffer,
  53                                 int buflen H_ERRNO_PARM);
  54
  55
  56 LOOKUP_TYPE *
  57 GETFUNC_NAME (void)
  58 {
  59   static char buffer[BUFLEN];
  60   LOOKUP_TYPE result;
  61
  62   return REENTRANT_GETNAME (&result, buffer, BUFLEN H_ERRNO_VAR);
  63 }