sysdeps/unix/bsd/dirstream.h

   1 /* Copyright (C) 1993, 1994 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., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #ifndef _DIRSTREAM_H
  20
  21 #define _DIRSTREAM_H    1
  22
  23 #define __need_size_t
  24 #include <stddef.h>
  25 #include <gnu/types.h>          /* For __off_t.  */
  26
  27 /* Directory stream type.
  28
  29    The BSD directory format is the same as `struct dirent', so `readdir'
  30    returns a pointer into the buffer we read directory data into.  */
  31
  32 typedef struct
  33   {
  34     int __fd;                   /* File descriptor.  */
  35
  36     char *__data;               /* Directory block.  */
  37     size_t __allocation;        /* Space allocated for the block.  */
  38     size_t __offset;            /* Current offset into the block.  */
  39     size_t __size;              /* Total valid data in the block.  */
  40     __off_t __pos;              /* Position in directory of this block.  */
  41   } DIR;
  42
  43 #ifdef __USE_BSD
  44 /* Macro to return the file descriptor used for an open directory.  */
  45 #define dirfd(DIR)      ((DIR)->__fd)
  46 #endif
  47
  48 #endif  /* dirstream.h */