sysdeps/unix/sysv/linux/ustat.c

   1 /* Get filesystem statistics (deprecated).  Linux version.
   2    Copyright (C) 1997-2024 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <shlib-compat.h>
  20
  21 /* This deprecated syscall is no longer used (replaced with {f}statfs).  */
  22 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_28)
  23
  24 # include <sysdep.h>
  25 # include <sys/types.h>
  26
  27 # ifndef DEV_TO_KDEV
  28 #  define DEV_TO_KDEV(__dev)                                    \
  29   ({                                                            \
  30     unsigned long long int k_dev;                               \
  31     k_dev = dev & ((1ULL << 32) - 1);                           \
  32     if (k_dev != dev)                                           \
  33      return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);         \
  34     (unsigned int) k_dev;                                       \
  35   })
  36 # endif
  37
  38 struct ustat
  39 {
  40   __daddr_t f_tfree;         /* Number of free blocks.  */
  41   __ino_t f_tinode;          /* Number of free inodes.  */
  42   char f_fname[6];
  43   char f_fpack[6];
  44 };
  45
  46 int
  47 __old_ustat (dev_t dev, struct ustat *ubuf)
  48 {
  49 # ifdef __NR_ustat
  50   return INLINE_SYSCALL_CALL (ustat, DEV_TO_KDEV (dev), ubuf);
  51 # else
  52   return INLINE_SYSCALL_ERROR_RETURN_VALUE (ENOSYS);
  53 # endif
  54 }
  55 compat_symbol (libc, __old_ustat, ustat, GLIBC_2_0);
  56 #endif /* SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_28)  */