sysdeps/unix/sysv/linux/readdir64.c

   1 /* Read a directory.  Linux LFS version.
   2    Copyright (C) 1997-2019 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 /* When _DIRENT_MATCHES_DIRENT64 is defined we can alias 'readdir64' to
  20    'readdir'.  However the function signatures are not equal due
  21    different return types, so we need to suppress {__}readdir so weak
  22    and strong alias do not throw conflicting types errors.  */
  23 #define readdir   __no_readdir_decl
  24 #define __readdir __no___readdir_decl
  25 #include <dirent.h>
  26
  27 #define __READDIR   __readdir64
  28 #define __GETDENTS  __getdents64
  29 #define DIRENT_TYPE struct dirent64
  30
  31 #include <sysdeps/posix/readdir.c>
  32
  33 #undef __readdir
  34 #undef readdir
  35
  36 libc_hidden_def (__readdir64)
  37 #if _DIRENT_MATCHES_DIRENT64
  38 strong_alias (__readdir64, __readdir)
  39 weak_alias (__readdir64, readdir64)
  40 weak_alias (__readdir64, readdir)
  41 #else
  42 /* The compat code expects the 'struct direct' with d_ino being a __ino_t
  43    instead of __ino64_t.  */
  44 # include <shlib-compat.h>
  45 versioned_symbol (libc, __readdir64, readdir64, GLIBC_2_2);
  46 # if SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2)
  47 #  include <olddirent.h>
  48 #  define __READDIR   attribute_compat_text_section __old_readdir64
  49 #  define __GETDENTS  __old_getdents64
  50 #  define DIRENT_TYPE struct __old_dirent64
  51 #  include <sysdeps/posix/readdir.c>
  52 libc_hidden_def (__old_readdir64)
  53 compat_symbol (libc, __old_readdir64, readdir64, GLIBC_2_1);
  54 # endif /* SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2)  */
  55 #endif /* _DIRENT_MATCHES_DIRENT64  */