sysdeps/unix/dirstream.h

   1 /* Copyright (C) 1993, 1995, 1996 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 #include <sys/types.h>
  24
  25 #include <libc-lock.h>
  26
  27 /* Directory stream type.
  28
  29    The miscellaneous Unix `readdir' implementations read directory data
  30    into a buffer and return `struct dirent *' pointers into it.  */
  31
  32 struct __dirstream
  33   {
  34     int fd;                     /* File descriptor.  */
  35
  36     char *data;                 /* Directory block.  */
  37     size_t allocation;          /* Space allocated for the block.  */
  38     size_t size;                /* Total valid data in the block.  */
  39     size_t offset;              /* Current offset into the block.  */
  40
  41     off_t filepos;              /* Position of next entry to read.  */
  42
  43     __libc_lock_define (, lock) /* Mutex lock for this structure.  */
  44   };
  45
  46 #define _DIR_dirfd(dirp)        ((dirp)->fd)
  47
  48 #endif  /* dirstream.h */