sysdeps/mach/hurd/readdir_r.c

   1 /* Copyright (C) 1993,94,95,96,97,2001,02 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <limits.h>
  21 #include <stddef.h>
  22 #include <string.h>
  23 #include <dirent.h>
  24 #include <unistd.h>
  25 #include <sys/types.h>
  26 #include <hurd.h>
  27 #include <hurd/fd.h>
  28 #include "dirstream.h"
  29
  30
  31 /* Read a directory entry from DIRP.  */
  32 int
  33 __readdir_r (DIR *dirp, struct dirent *entry, struct dirent **result)
  34 {
  35   if (sizeof (struct dirent64) == sizeof (struct dirent))
  36     /* We should in fact just be an alias to readdir64_r on this machine.  */
  37     return __readdir64_r (dirp,
  38                           (struct dirent64 *) entry,
  39                           (struct dirent64 **) result);
  40
  41   struct dirent64 *result64;
  42   union
  43   {
  44     struct dirent64 d;
  45     char b[offsetof (struct dirent64, d_name) + UCHAR_MAX + 1];
  46   } u;
  47   int err;
  48
  49   err = __readdir64_r (dirp, &u.d, &result64);
  50   if (result64)
  51     {
  52       entry->d_fileno = result64->d_fileno;
  53       entry->d_reclen = result64->d_reclen;
  54       entry->d_type = result64->d_type;
  55       entry->d_namlen = result64->d_namlen;
  56       memcpy (entry->d_name, result64->d_name, result64->d_namlen + 1);
  57       *result = entry;
  58     }
  59   else
  60     *result = NULL;
  61
  62   return err;
  63 }
  64
  65 weak_alias (__readdir_r, readdir_r)