/*

 * Copyright (C) 2012 Red Hat, Inc.

 *

 * Author: Angus Salkeld <asalkeld@redhat.com>

 *

 * libqb is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as published by

 * the Free Software Foundation, either version 2.1 of the License, or

 * (at your option) any later version.

 *

 * libqb is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with libqb.  If not, see <http://www.gnu.org/licenses/>.

 */

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <unistd.h>

#include <signal.h>

#include <qb/qbdefs.h>

#include <qb/qbrb.h>

#include <qb/qbutil.h>

#include <qb/qblog.h>

#define ONE_MEG 1048576

static qb_ringbuffer_t *rb = NULL;

static int keep_reading = QB_TRUE;

int8_t buffer[ONE_MEG];

static void sigterm_handler(int32_t num)

{

	qb_log(LOG_INFO, "signal %d", num);

	keep_reading = QB_FALSE;

}

int32_t main(int32_t argc, char *argv[])

{

	ssize_t num_read;

	signal(SIGINT, sigterm_handler);

	qb_log_init("rbreader", LOG_USER, LOG_EMERG);

	qb_log_ctl(QB_LOG_SYSLOG, QB_LOG_CONF_ENABLED, QB_FALSE);

	qb_log_filter_ctl(QB_LOG_STDERR, QB_LOG_FILTER_ADD,

			  QB_LOG_FILTER_FILE, "*", LOG_TRACE);

	qb_log_ctl(QB_LOG_STDERR, QB_LOG_CONF_ENABLED, QB_TRUE);

	rb = qb_rb_open("tester", ONE_MEG * 3,

			QB_RB_FLAG_SHARED_PROCESS |

			QB_RB_FLAG_CREATE, 0);

	if (rb == NULL) {

		qb_perror(LOG_ERR, "failed to create ringbuffer");

		return -1;

	}

	while (keep_reading) {

		num_read = qb_rb_chunk_read(rb, buffer,

					    ONE_MEG, 0);

		if (num_read == -ETIMEDOUT) {

			usleep(100000);

		} else if (num_read < 0) {

			errno = -num_read;

			qb_perror(LOG_ERR, "nothing to read");

		}

	}

	qb_rb_close(rb);

	qb_log_fini();

	return 0;

}