include/posixdir.h

   1 /* posixdir.h -- Posix directory reading includes and defines. */
   2
   3 /* Copyright (C) 1987,1991,2012,2019,2021 Free Software Foundation, Inc.
   4
   5    This file is part of GNU Bash, the Bourne Again SHell.
   6
   7    Bash is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation, either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    Bash is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with Bash.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 /* This file should be included instead of <dirent.h> or <sys/dir.h>. */
  22
  23 #if !defined (_POSIXDIR_H_)
  24 #define _POSIXDIR_H_
  25
  26 #if defined (HAVE_DIRENT_H)
  27 #  include <dirent.h>
  28 #  if defined (HAVE_STRUCT_DIRENT_D_NAMLEN)
  29 #    define D_NAMLEN(d) ((d)->d_namlen)
  30 #  else
  31 #    define D_NAMLEN(d)   (strlen ((d)->d_name))
  32 #  endif /* !HAVE_STRUCT_DIRENT_D_NAMLEN */
  33 #else
  34 #  if defined (HAVE_SYS_NDIR_H)
  35 #    include <sys/ndir.h>
  36 #  endif
  37 #  if defined (HAVE_SYS_DIR_H)
  38 #    include <sys/dir.h>
  39 #  endif
  40 #  if defined (HAVE_NDIR_H)
  41 #    include <ndir.h>
  42 #  endif
  43 #  if !defined (dirent)
  44 #    define dirent direct
  45 #  endif /* !dirent */
  46 #  define D_NAMLEN(d)   ((d)->d_namlen)
  47 #endif /* !HAVE_DIRENT_H */
  48
  49 /* The bash code fairly consistently uses d_fileno; make sure it's available */
  50 #if defined (HAVE_STRUCT_DIRENT_D_INO) && !defined (HAVE_STRUCT_DIRENT_D_FILENO)
  51 #  define d_fileno d_ino
  52 #endif
  53
  54 /* Posix does not require that the d_ino field be present, and some
  55    systems do not provide it. */
  56 #if !defined (HAVE_STRUCT_DIRENT_D_INO) || defined (BROKEN_DIRENT_D_INO)
  57 #  define REAL_DIR_ENTRY(dp) 1
  58 #else
  59 #  define REAL_DIR_ENTRY(dp) (dp->d_ino != 0)
  60 #endif /* _POSIX_SOURCE */
  61
  62 #if defined (HAVE_STRUCT_DIRENT_D_INO) && !defined (BROKEN_DIRENT_D_INO)
  63 #  define D_INO_AVAILABLE
  64 #endif
  65
  66 /* Signal the rest of the code that it can safely use dirent.d_fileno */
  67 #if defined (D_INO_AVAILABLE) || defined (HAVE_STRUCT_DIRENT_D_FILENO)
  68 #  define D_FILENO_AVAILABLE 1
  69 #endif
  70
  71 #endif /* !_POSIXDIR_H_ */