Function siftr_sysctl_logfile_name_handler

freebsd/netinet/siftr.c:1191–1227

}

static int
siftr_sysctl_logfile_name_handler(SYSCTL_HANDLER_ARGS)
{
	struct alq *new_alq;
	int error;

	error = sysctl_handle_string(oidp, arg1, arg2, req);

	/* Check for error or same filename */
	if (error != 0 || req->newptr == NULL ||
	    strncmp(siftr_logfile, arg1, arg2) == 0)
		goto done;

	/* Filname changed */
	error = alq_open(&new_alq, arg1, curthread->td_ucred,
	    SIFTR_LOG_FILE_MODE, SIFTR_ALQ_BUFLEN, 0);
	if (error != 0)
		goto done;

	/*
	 * If disabled, siftr_alq == NULL so we simply close
	 * the alq as we've proved it can be opened.
	 * If enabled, close the existing alq and switch the old
	 * for the new.
	 */
	if (siftr_alq == NULL) {
		alq_close(new_alq);
	} else {
		alq_close(siftr_alq);
		siftr_alq = new_alq;
	}

	/* Update filename upon success */
	strlcpy(siftr_logfile, arg1, arg2);
done:
	return (error);
}

static int
siftr_manage_ops(uint8_t action)