Function cncheckc

freebsd/kern/kern_cons.c:428–446

}

int
cncheckc(void)
{
	struct cn_device *cnd;
	struct consdev *cn;
	int c;

	if (cn_mute)
		return (-1);
	STAILQ_FOREACH(cnd, &cn_devlist, cnd_next) {
		cn = cnd->cnd_cn;
		if (!kdb_active || !(cn->cn_flags & CN_FLAG_NODEBUG)) {
			c = cn->cn_ops->cn_getc(cn);
			if (c != -1)
				return (c);
		}
	}
	return (-1);
}

void
cngets(char *cp, size_t size, int visible)