static off_t IMFS_fifo_lseek(
    rtems_libio_t *iop,
    off_t          offset,
    int            whence
)
{
    off_t err = pipe_lseek(LIBIO2PIPE(iop), offset, whence, iop);
    IMFS_FIFO_RETURN(err);
}
epos_off64_t IMFS_fifo_lseek(
  epos_libio_t *iop,
  epos_off64_t  offset,
  int            whence
)
{
  off_t err = pipe_lseek(LIBIO2PIPE(iop), offset, whence, iop);
  IMFS_FIFO_RETURN(err);
}