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/*-
 *   BSD LICENSE
 * 
 *   Copyright(c) 2010-2013 Intel Corporation. All rights reserved.
 *   All rights reserved.
 * 
 *   Redistribution and use in source and binary forms, with or without 
 *   modification, are permitted provided that the following conditions 
 *   are met:
 * 
 *     * Redistributions of source code must retain the above copyright 
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright 
 *       notice, this list of conditions and the following disclaimer in 
 *       the documentation and/or other materials provided with the 
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its 
 *       contributors may be used to endorse or promote products derived 
 *       from this software without specific prior written permission.
 * 
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 */

#include <string.h>
#include <stdio.h>
#include <stdint.h>
#include <sys/types.h>
#include <syslog.h>
#include <sys/queue.h>

#include <rte_memory.h>
#include <rte_memzone.h>
#include <rte_tailq.h>
#include <rte_eal.h>
#include <rte_launch.h>
#include <rte_per_lcore.h>
#include <rte_lcore.h>
#include <rte_spinlock.h>
#include <rte_log.h>

#include "eal_private.h"

/*
 * default log function, used once mempool (hence log history) is
 * available
 */
static ssize_t
console_log_write(__attribute__((unused)) void *c, const char *buf, size_t size)
{
	char copybuf[BUFSIZ + 1];
	ssize_t ret;
	uint32_t loglevel;

	/* add this log in history */
	rte_log_add_in_history(buf, size);

	/* write on stdout */
	ret = fwrite(buf, 1, size, stdout);
	fflush(stdout);

	/* truncate message if too big (should not happen) */
	if (size > BUFSIZ)
		size = BUFSIZ;

	/* Syslog error levels are from 0 to 7, so subtract 1 to convert */
	loglevel = rte_log_cur_msg_loglevel() - 1;
	memcpy(copybuf, buf, size);
	copybuf[size] = '\0';

	/* write on syslog too */
	syslog(loglevel, "%s", copybuf);

	return ret;
}

static ssize_t
console_log_read(__attribute__((unused)) void *c,
		 __attribute__((unused)) char *buf,
		 __attribute__((unused)) size_t size)
{
	return 0;
}

static int
console_log_seek(__attribute__((unused)) void *c,
		 __attribute__((unused)) off64_t *offset,
		 __attribute__((unused)) int whence)
{
	return -1;
}

static int
console_log_close(__attribute__((unused)) void *c)
{
	return 0;
}

static cookie_io_functions_t console_log_func = {
	.read  = console_log_read,
	.write = console_log_write,
	.seek  = console_log_seek,
	.close = console_log_close
};

/*
 * set the log to default function, called during eal init process,
 * once memzones are available.
 */
int
rte_eal_log_init(const char *id, int facility)
{
	FILE *log_stream;

	log_stream = fopencookie(NULL, "w+", console_log_func);
	if (log_stream == NULL)
		return -1;

	openlog(id, LOG_NDELAY | LOG_PID, facility);

	if (rte_eal_common_log_init(log_stream) < 0)
		return -1;

	return 0;
}