sysdeps/unix/sysv/linux/fstatvfs64.c

   1 /* Return information about the filesystem on which FD resides.
   2    Copyright (C) 1996,1997,1998,2000,2001,2004,2006
   3         Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <errno.h>
  22 #include <string.h>
  23 #include <sys/stat.h>
  24 #include <sys/statfs.h>
  25 #include <sys/statvfs.h>
  26 #include <kernel-features.h>
  27
  28
  29 extern void __internal_statvfs64 (const char *name, struct statvfs64 *buf,
  30                                   struct statfs64 *fsbuf, struct stat64 *st);
  31
  32
  33 /* Return information about the filesystem on which FD resides.  */
  34 int
  35 __fstatvfs64 (int fd, struct statvfs64 *buf)
  36 {
  37   struct statfs64 fsbuf;
  38   int res = __fstatfs64 (fd, &fsbuf);
  39
  40 #ifndef __ASSUME_STATFS64
  41   if (res < 0 && errno == ENOSYS)
  42     {
  43       struct statvfs buf32;
  44
  45       res = fstatvfs (fd, &buf32);
  46       if (res == 0)
  47         {
  48           buf->f_bsize = buf32.f_bsize;
  49           buf->f_frsize = buf32.f_frsize;
  50           buf->f_blocks = buf32.f_blocks;
  51           buf->f_bfree = buf32.f_bfree;
  52           buf->f_bavail = buf32.f_bavail;
  53           buf->f_files = buf32.f_files;
  54           buf->f_ffree = buf32.f_ffree;
  55           buf->f_favail = buf32.f_favail;
  56           buf->f_fsid = buf32.f_fsid;
  57           buf->f_flag = buf32.f_flag;
  58           buf->f_namemax = buf32.f_namemax;
  59           memcpy (buf->__f_spare, buf32.__f_spare, sizeof (buf32.__f_spare));
  60         }
  61     }
  62 #endif
  63
  64   if (res == 0)
  65     {
  66       /* Convert the result.  */
  67       struct stat64 st;
  68       __internal_statvfs64 (NULL, buf, &fsbuf,
  69                             fstat64 (fd, &st) == -1 ? NULL : &st);
  70     }
  71
  72   return res;
  73 }
  74 weak_alias (__fstatvfs64, fstatvfs64)