buf->st_blocks = (buf->st_size + buf->st_blksize -1)/buf->st_blksize;
buf->yst_atime = obj->yst_atime;
buf->yst_ctime = obj->yst_ctime;
buf->st_blocks = (buf->st_size + buf->st_blksize -1)/buf->st_blksize;
buf->yst_atime = obj->yst_atime;
buf->yst_ctime = obj->yst_ctime;