sysdeps/mach/hurd/xstatconv.c

   1 /* Convert between `struct stat' format, and `struct stat64' format.
   2    Copyright (C) 2000-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <sys/stat.h>
  21
  22 static inline int
  23 xstat64_conv (struct stat *buf, const struct stat64 *buf64)
  24 {
  25   if (sizeof *buf == sizeof *buf64
  26       && sizeof buf->st_ino == sizeof buf64->st_ino
  27       && sizeof buf->st_size == sizeof buf64->st_size
  28       && sizeof buf->st_blocks == sizeof buf64->st_blocks)
  29     {
  30       *buf = *(struct stat *) buf64;
  31       return 0;
  32     }
  33
  34   buf->st_fstype = buf64->st_fstype;
  35   buf->st_fsid = buf64->st_fsid;
  36   buf->st_ino = buf64->st_ino;
  37   buf->st_gen = buf64->st_gen;
  38   buf->st_rdev = buf64->st_rdev;
  39   buf->st_mode = buf64->st_mode;
  40   buf->st_nlink = buf64->st_nlink;
  41   buf->st_uid = buf64->st_uid;
  42   buf->st_gid = buf64->st_gid;
  43   buf->st_size = buf64->st_size;
  44   buf->st_atim = buf64->st_atim;
  45   buf->st_mtim = buf64->st_mtim;
  46   buf->st_ctim = buf64->st_ctim;
  47   buf->st_blksize = buf64->st_blksize;
  48   buf->st_blocks = buf64->st_blocks;
  49   buf->st_author = buf64->st_author;
  50   buf->st_flags = buf64->st_flags;
  51
  52   if ((sizeof buf->st_ino != sizeof buf64->st_ino
  53        && buf->st_ino != buf64->st_ino)
  54       || (sizeof buf->st_size != sizeof buf64->st_size
  55           && buf->st_size != buf64->st_size)
  56       || (sizeof buf->st_blocks != sizeof buf64->st_blocks
  57           && buf->st_blocks != buf64->st_blocks))
  58     {
  59       __set_errno (EOVERFLOW);
  60       return -1;
  61     }
  62
  63   return 0;
  64 }