1  /* Copyright (C) 1993-2023 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, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <limits.h>
      20  #include <stddef.h>
      21  #include <string.h>
      22  #include <dirent.h>
      23  #include <unistd.h>
      24  #include <sys/types.h>
      25  #include <hurd.h>
      26  #include <hurd/fd.h>
      27  #include "dirstream.h"
      28  
      29  
      30  /* Read a directory entry from DIRP.  */
      31  int
      32  __readdir_r (DIR *dirp, struct dirent *entry, struct dirent **result)
      33  {
      34    if (sizeof (struct dirent64) == sizeof (struct dirent))
      35      /* We should in fact just be an alias to readdir64_r on this machine.  */
      36      return __readdir64_r (dirp,
      37  			  (struct dirent64 *) entry,
      38  			  (struct dirent64 **) result);
      39  
      40    struct dirent64 *result64;
      41    union
      42    {
      43      struct dirent64 d;
      44      char b[offsetof (struct dirent64, d_name) + UCHAR_MAX + 1];
      45    } u;
      46    int err;
      47  
      48    err = __readdir64_r (dirp, &u.d, &result64);
      49    if (result64)
      50      {
      51        entry->d_fileno = result64->d_fileno;
      52        entry->d_reclen = result64->d_reclen;
      53        entry->d_type = result64->d_type;
      54        entry->d_namlen = result64->d_namlen;
      55        memcpy (entry->d_name, result64->d_name, result64->d_namlen + 1);
      56        *result = entry;
      57      }
      58    else
      59      *result = NULL;
      60  
      61    return err;
      62  }
      63  
      64  weak_alias (__readdir_r, readdir_r)