/* Convert between the kernel's `struct stat' format, and libc's.

   Copyright (C) 1991-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <assert.h>

#include <errno.h>

#include <sys/stat.h>

#include <kernel_stat.h>

#include <string.h>

int

__xstat_conv (int vers, struct kernel_stat *kbuf, void *ubuf)

{

  switch (vers)

    {

    case _STAT_VER_KERNEL:

      /* Nothing to do.  The struct is in the form the kernel expects.

         We should have short-circuted before we got here, but for

         completeness... */

      *(struct kernel_stat *) ubuf = *kbuf;

      break;

    case _STAT_VER_LINUX:

      {

	struct stat *buf = ubuf;

	/* Convert to current kernel version of `struct stat'.  */

	buf->st_dev = kbuf->st_dev;

	buf->__pad1 = 0;

	buf->st_ino = kbuf->st_ino;

	buf->st_mode = kbuf->st_mode;

	buf->st_nlink = kbuf->st_nlink;

	buf->st_uid = kbuf->st_uid;

	buf->st_gid = kbuf->st_gid;

	buf->st_rdev = kbuf->st_rdev;

	buf->__pad2 = 0;

	buf->st_size = kbuf->st_size;

	buf->st_blksize = kbuf->st_blksize;

	buf->st_blocks = kbuf->st_blocks;

	buf->st_atim.tv_sec = kbuf->st_atime_sec;

	buf->st_atim.tv_nsec = 0;

	buf->st_mtim.tv_sec = kbuf->st_mtime_sec;

	buf->st_mtim.tv_nsec = 0;

	buf->st_ctim.tv_sec = kbuf->st_ctime_sec;

	buf->st_ctim.tv_nsec = 0;

	buf->__glibc_reserved4 = 0;

	buf->__glibc_reserved5 = 0;

      }

      break;

    default:

      __set_errno (EINVAL);

      return -1;

    }

  return 0;

}

int

__xstat32_conv (int vers, struct stat64 *sbuf, struct stat *buf)

{

  struct kernel_stat64 *kbuf;

  /* *stat64 syscalls on sparc64 really fill in struct kernel_stat64,

     rather than struct stat64.  But it is the same size as

     struct kernel_stat64, so use this hack so that we can reuse

     i386 {,f,l}xstat{,at}.c routines.  */

  __asm ("" : "=r" (kbuf) : "0" (sbuf));

  assert (sizeof (struct stat) == sizeof (struct stat64));

  assert (sizeof (struct stat64) >= sizeof (struct kernel_stat64));

  switch (vers)

    {

    case _STAT_VER_LINUX:

      {

	/* Convert current kernel version of `struct stat64' to

           `struct stat'.  */

	buf->st_dev = kbuf->st_dev;

	buf->__pad1 = 0;

	buf->st_ino = kbuf->st_ino;

	buf->st_mode = kbuf->st_mode;

	buf->st_nlink = kbuf->st_nlink;

	buf->st_uid = kbuf->st_uid;

	buf->st_gid = kbuf->st_gid;

	buf->st_rdev = kbuf->st_rdev;

	buf->__pad2 = 0;

	buf->st_size = kbuf->st_size;

	buf->st_blksize = kbuf->st_blksize;

	buf->st_blocks = kbuf->st_blocks;

	buf->st_atim.tv_sec = kbuf->st_atime_sec;

	buf->st_atim.tv_nsec = kbuf->st_atime_nsec;

	buf->st_mtim.tv_sec = kbuf->st_mtime_sec;

	buf->st_mtim.tv_nsec = kbuf->st_mtime_nsec;

	buf->st_ctim.tv_sec = kbuf->st_ctime_sec;

	buf->st_ctim.tv_nsec = kbuf->st_ctime_nsec;

	buf->__glibc_reserved4 = 0;

	buf->__glibc_reserved5 = 0;

      }

      break;

      /* If struct stat64 is different from struct stat then

	 _STAT_VER_KERNEL does not make sense.  */

    case _STAT_VER_KERNEL:

    default:

      __set_errno (EINVAL);

      return -1;

    }

  return 0;

}