sysdeps/unix/sysv/linux/fstatfs.c

   1 /* Get filesystem statistics.  Linux version.
   2    Copyright (C) 2021-2024 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 <sys/statfs.h>
  20 #include <time.h>
  21 #include <sysdep.h>
  22 #include <kernel_stat.h>
  23
  24 #if !STATFS_IS_STATFS64
  25
  26 /* Return information about the filesystem on which FILE resides.  */
  27 int
  28 __fstatfs (int fd, struct statfs *buf)
  29 {
  30   struct statfs64 buf64;
  31   int rc = INLINE_SYSCALL_CALL (fstatfs64, fd, sizeof (buf64), &buf64);
  32   if (rc != 0)
  33     return rc;
  34
  35   buf->f_type = buf64.f_type;
  36   buf->f_bsize = buf64.f_bsize;
  37   buf->f_blocks = buf64.f_blocks;
  38   buf->f_bfree = buf64.f_bfree;
  39   buf->f_bavail = buf64.f_bavail;
  40   buf->f_files = buf64.f_files;
  41   buf->f_ffree = buf64.f_ffree;
  42   buf->f_fsid = buf64.f_fsid;
  43   buf->f_namelen = buf64.f_namelen;
  44   buf->f_frsize = buf64.f_frsize;
  45   buf->f_flags = buf64.f_flags;
  46   memcpy (buf->f_spare, buf64.f_spare, sizeof (buf64.f_spare));
  47
  48   if ((fsblkcnt_t) buf64.f_blocks != buf64.f_blocks
  49       || (fsblkcnt_t) buf64.f_bfree != buf64.f_bfree
  50       || (fsblkcnt_t) buf64.f_bavail != buf64.f_bavail
  51       || (fsblkcnt_t) buf64.f_files != buf64.f_files
  52       || (fsblkcnt_t) buf64.f_ffree != buf64.f_ffree)
  53    {
  54      __set_errno (EOVERFLOW);
  55      return -1;
  56    }
  57
  58   return 0;
  59 }
  60 libc_hidden_def (__fstatfs)
  61 weak_alias (__fstatfs, fstatfs)
  62 #endif