SM_IO_SEEK_SET
whence = SM_IO_SEEK_SET;
case SM_IO_SEEK_SET:
if (whence == SM_IO_SEEK_SET)
if ((*seekfn)(fp, curoff, SM_IO_SEEK_SET) == POS_ERR)
(void) sm_io_seek(fp, timeout, 0L, SM_IO_SEEK_SET);
case SM_IO_SEEK_SET:
return sm_io_seek(fp, SM_TIME_DEFAULT, 0, SM_IO_SEEK_SET);