sysdeps/generic/dl-fileid.h

   1 /* File identity for the dynamic linker.  Stub version.
   2    Copyright (C) 2015-2023 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 <stdbool.h>
  20
  21 /* This type stores whatever information is fetched by _dl_get_file_id
  22    and compared by _dl_file_id_match_p.  */
  23 struct r_file_id
  24   {
  25     /* In the stub version, we don't record anything at all.  */
  26   };
  27
  28 /* Sample FD to fill in *ID.  Returns true on success.
  29    On error, returns false, with errno set.  */
  30 static inline bool
  31 _dl_get_file_id (int fd __attribute__ ((unused)),
  32                  struct r_file_id *id __attribute__ ((unused)))
  33 {
  34   return true;
  35 }
  36
  37 /* Compare two results from _dl_get_file_id for equality.
  38    It's crucial that this never return false-positive matches.
  39    It's ideal that it never return false-negative mismatches either,
  40    but lack of matches is survivable.  */
  41 static inline bool
  42 _dl_file_id_match_p (const struct r_file_id *a __attribute__ ((unused)),
  43                      const struct r_file_id *b __attribute__ ((unused)))
  44 {
  45   return false;
  46 }