struct statfs {
  unsigned long f_type, __pad0, f_bsize, __pad1;
  fsblkcnt_t f_blocks, f_bfree, f_bavail;
  fsfilcnt_t f_files, f_ffree;
  fsid_t f_fsid;
  unsigned long f_namelen, __pad2, f_frsize, __pad3;
  unsigned long f_flags, __pad4;
  unsigned long long f_spare[4];
};