sysdeps/unix/sysv/linux/statvfs64.c

   1 /* Return information about the filesystem on which FILE resides.
   2    Copyright (C) 1998-2017 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <stddef.h>
  21 #include <string.h>
  22 #include <sys/stat.h>
  23 #include <sys/statfs.h>
  24 #include "internal_statvfs.h"
  25 #include <kernel-features.h>
  26
  27 /* Return information about the filesystem on which FILE resides.  */
  28 int
  29 __statvfs64 (const char *file, struct statvfs64 *buf)
  30 {
  31   struct statfs64 fsbuf;
  32   int res = __statfs64 (file, &fsbuf);
  33
  34 #ifndef __ASSUME_STATFS64
  35   if (res < 0 && errno == ENOSYS)
  36     {
  37       struct statvfs buf32;
  38
  39       res = statvfs (file, &buf32);
  40       if (res == 0)
  41         {
  42           buf->f_bsize = buf32.f_bsize;
  43           buf->f_frsize = buf32.f_frsize;
  44           buf->f_blocks = buf32.f_blocks;
  45           buf->f_bfree = buf32.f_bfree;
  46           buf->f_bavail = buf32.f_bavail;
  47           buf->f_files = buf32.f_files;
  48           buf->f_ffree = buf32.f_ffree;
  49           buf->f_favail = buf32.f_favail;
  50           buf->f_fsid = buf32.f_fsid;
  51           buf->f_flag = buf32.f_flag;
  52           buf->f_namemax = buf32.f_namemax;
  53           memcpy (buf->__f_spare, buf32.__f_spare, sizeof (buf32.__f_spare));
  54         }
  55     }
  56 #endif
  57
  58   if (res == 0)
  59     /* Convert the result.  */
  60     __internal_statvfs64 (file, buf, &fsbuf, -1);
  61
  62   return res;
  63 }
  64 weak_alias (__statvfs64, statvfs64)