glibc/sysdeps/unix/sysv/linux/ustat.c

/* Get filesystem statistics (deprecated).  Linux version.
   Copyright (C) 1997-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.

   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 <shlib-compat.h>

/* This deprecated syscall is no longer used (replaced with {f}statfs).  */
#if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_28)

# include <sysdep.h>
# include <errno.h>

# ifndef DEV_TO_KDEV
#  define DEV_TO_KDEV(__dev)					\
  ({								\
    unsigned long long int k_dev;				\
    k_dev = dev & ((1ULL << 32) - 1);				\
    if (k_dev != dev)						\
     return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);		\
    (unsigned int) k_dev;					\
  })
# endif

struct ustat
{
  __daddr_t f_tfree;         /* Number of free blocks.  */
  __ino_t f_tinode;          /* Number of free inodes.  */
  char f_fname[6];
  char f_fpack[6];
};

int
__old_ustat (dev_t dev, struct ustat *ubuf)
{
# ifdef __NR_ustat
  return INLINE_SYSCALL_CALL (ustat, DEV_TO_KDEV (dev), ubuf);
# else
  return INLINE_SYSCALL_ERROR_RETURN_VALUE (ENOSYS);
# endif
}
compat_symbol (libc, __old_ustat, ustat, GLIBC_2_0);
#endif /* SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_28)  */