return ftruncate (fd, (off_t) length);
return __ftruncate (fd, (off_t) length);
ftruncate64 (fd, length)     int fd;     off64_t length;{  if ((off_t) length != length)    {      __set_errno (EINVAL);      return -1;    }  return ftruncate (fd, (off_t) length);}