nss/compat-lookup.c

   1 /* Compatibility stubs of accidentally exported __nss_*_lookup functions.
   2    Copyright (C) 2017-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 #include <shlib-compat.h>
  22 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_27)
  23
  24 # include <errno.h>
  25
  26 /* On i386, the function calling convention changed from the standard
  27    ABI calling convention to three register parameters in glibc 2.8.
  28    The following error-returning stub happens to be compatible with
  29    glibc 2.7 and earlier and glibc 2.8 and later, even on i386.  */
  30 int
  31 attribute_compat_text_section
  32 __nss_passwd_lookup (nss_action_list *ni, const char *fct_name, void **fctp)
  33 {
  34   __set_errno (ENOSYS);
  35   return -1;
  36 }
  37 compat_symbol (libc, __nss_passwd_lookup, __nss_passwd_lookup, GLIBC_2_0);
  38 strong_alias (__nss_passwd_lookup, __nss_group_lookup)
  39 compat_symbol (libc, __nss_group_lookup, __nss_group_lookup, GLIBC_2_0);
  40 strong_alias (__nss_passwd_lookup, __nss_hosts_lookup)
  41 compat_symbol (libc, __nss_hosts_lookup, __nss_hosts_lookup, GLIBC_2_0);
  42
  43 #endif /* SHLIB_COMPAT */
  44
  45 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_30)
  46
  47 /* These functions were exported under a non-GLIBC_PRIVATE version,
  48    even though it is not usable externally due to the service_user
  49    (now nss_action_list) type dependency.  */
  50
  51 int
  52 attribute_compat_text_section
  53 __nss_next (nss_action_list *ni, const char *fct_name, void **fctp, int status,
  54             int all_values)
  55 {
  56   return -1;
  57 }
  58 compat_symbol (libc, __nss_next, __nss_next, GLIBC_2_0);
  59
  60 int
  61 attribute_compat_text_section
  62 __nss_database_lookup (const char *database, const char *alternate_name,
  63                        const char *defconfig, nss_action_list *ni)
  64 {
  65   *ni = NULL;
  66   return -1;
  67 }
  68 compat_symbol (libc, __nss_database_lookup, __nss_database_lookup, GLIBC_2_0);
  69
  70 #endif /* SHLIB_COMPAT */