Function logpoll

freebsd/kern/subr_log.c:182–196

ARGSUSED*/

/*ARGSUSED*/
static	int
logpoll(struct cdev *dev, int events, struct thread *td)
{
	int revents = 0;

	if (events & (POLLIN | POLLRDNORM)) {
		mtx_lock(&msgbuf_lock);
		if (msgbuf_getcount(msgbufp) > 0)
			revents |= events & (POLLIN | POLLRDNORM);
		else
			selrecord(td, &logsoftc.sc_selp);
		mtx_unlock(&msgbuf_lock);
	}
	return (revents);
}

static int
logkqfilter(struct cdev *dev, struct knote *kn)