seq_copytoinput
if (seq_copytoinput(scp, event, 4) == EAGAIN) {
seq_copytoinput(scp, event, 8);
seq_copytoinput(scp, (u_char *)¶m, 4);
seq_copytoinput(scp, event, 8);
void seq_copytoinput(struct seq_softc *scp, u_char *event, int len);