sawritefilemarks
error = sawritefilemarks(periph, count, FALSE, FALSE);
error = sawritefilemarks(periph, count, FALSE, TRUE);
error = sawritefilemarks(periph, count, TRUE, FALSE);
error = sawritefilemarks(periph, markswanted, FALSE, FALSE);
error = sawritefilemarks(periph, 0, 0, 0);
static int sawritefilemarks(struct cam_periph *periph,