/* Return information about the filesystem on which FD resides.

   Copyright (C) 1996-2018 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 <errno.h>

#include <string.h>

#include <stddef.h>

#include <sysdep.h>

#include <kernel_stat.h>

/* Hide the prototypes for __fstatfs and fstatfs so that GCC will not

   complain about the different function signatures if they are aliased

   to  __fstat64.  If STATFS_IS_STATFS64 is not zero then the statfs and

   statfs64 structures have an identical layout but different type names.  */

#if STATFS_IS_STATFS64

# define __fstatfs __fstatfs_disable

# define fstatfs fstatfs_disable

#endif

#include <sys/statfs.h>

#include <kernel-features.h>

/* Defined in statfs64.c.  */

extern int __no_statfs64 attribute_hidden;

/* Return information about the filesystem on which FD resides.  */

int

__fstatfs64 (int fd, struct statfs64 *buf)

{

#ifdef __NR_fstatfs64

# if __ASSUME_STATFS64 == 0

  if (! __no_statfs64)

# endif

    {

      int result = INLINE_SYSCALL (fstatfs64, 3, fd, sizeof (*buf), buf);

# if __ASSUME_STATFS64 == 0

      if (result == 0 || errno != ENOSYS)

# endif

	return result;

# if __ASSUME_STATFS64 == 0

      __no_statfs64 = 1;

# endif

    }

#endif

#if __ASSUME_STATFS64 == 0

  struct statfs buf32;

  if (__fstatfs (fd, &buf32) < 0)

    return -1;

  buf->f_type = buf32.f_type;

  buf->f_bsize = buf32.f_bsize;

  buf->f_blocks = buf32.f_blocks;

  buf->f_bfree = buf32.f_bfree;

  buf->f_bavail = buf32.f_bavail;

  buf->f_files = buf32.f_files;

  buf->f_ffree = buf32.f_ffree;

  buf->f_fsid = buf32.f_fsid;

  buf->f_namelen = buf32.f_namelen;

  buf->f_frsize = buf32.f_frsize;

  memcpy (buf->f_spare, buf32.f_spare, sizeof (buf32.f_spare));

  return 0;

#endif

}

weak_alias (__fstatfs64, fstatfs64)

#undef __fstatfs

#undef fstatfs

#if STATFS_IS_STATFS64

weak_alias (__fstatfs64, __fstatfs)

weak_alias (__fstatfs64, fstatfs)

#endif