sysdeps/unix/sysv/linux/statvfs64.c

   1 /* Return information about the filesystem on which FILE resides.
   2    Copyright (C) 1998-2014 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 <sys/statvfs.h>
  25 #include <kernel-features.h>
  26
  27
  28 extern void __internal_statvfs64 (const char *name, struct statvfs64 *buf,
  29                                   struct statfs64 *fsbuf, struct stat64 *st);
  30
  31
  32 /* Return information about the filesystem on which FILE resides.  */
  33 int
  34 __statvfs64 (const char *file, struct statvfs64 *buf)
  35 {
  36   struct statfs64 fsbuf;
  37   int res = __statfs64 (file, &fsbuf);
  38
  39 #ifndef __ASSUME_STATFS64
  40   if (res < 0 && errno == ENOSYS)
  41     {
  42       struct statvfs buf32;
  43
  44       res = statvfs (file, &buf32);
  45       if (res == 0)
  46         {
  47           buf->f_bsize = buf32.f_bsize;
  48           buf->f_frsize = buf32.f_frsize;
  49           buf->f_blocks = buf32.f_blocks;
  50           buf->f_bfree = buf32.f_bfree;
  51           buf->f_bavail = buf32.f_bavail;
  52           buf->f_files = buf32.f_files;
  53           buf->f_ffree = buf32.f_ffree;
  54           buf->f_favail = buf32.f_favail;
  55           buf->f_fsid = buf32.f_fsid;
  56           buf->f_flag = buf32.f_flag;
  57           buf->f_namemax = buf32.f_namemax;
  58           memcpy (buf->__f_spare, buf32.__f_spare, sizeof (buf32.__f_spare));
  59         }
  60     }
  61 #endif
  62
  63   if (res == 0)
  64     {
  65       /* Convert the result.  */
  66       struct stat64 st;
  67       __internal_statvfs64 (file, buf, &fsbuf,
  68                             stat64 (file, &st) == -1 ? NULL : &st);
  69     }
  70
  71   return res;
  72 }
  73 weak_alias (__statvfs64, statvfs64)