log.h

/*
 * Copyright (c) 2017-2022 Pantacor Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifdef DEBUG
#undef DEBUG
#endif

#ifndef PV_LOG_H
#define PV_LOG_H

#include "pantavisor.h"
#include <stdarg.h>

#ifdef DEBUG
#define WARN_ONCE(msg, args...)                                                \
	do {                                                                   \
		static bool __warned = false;                                  \
		if (!__warned) {                                               \
			pv_log(WARN, msg, ##args);                             \
			__warned = true;                                       \
		}                                                              \
	} while (0)
#else
#define WARN_ONCE(msg, args...)
#endif

void exit_error(int err, char *msg) __attribute__((__noreturn__));

enum log_level {
	FATAL, // 0
	ERROR, // 1
	WARN, // 2
	INFO, // 3
	DEBUG, // 4
	ALL // 5
};

#define JSON_FORMAT                                                            \
	"{ \"tsec\": %" PRId64 ", \"tnano\": %" PRId32                         \
	", \"lvl\": \"%s\", \"src\": \"%s\", \"msg\": \"%s\" }"

// Example log:		"[pantavisor] WARN [2016-12-01 13:22:26] -- [updater]: Cannot poke cloud"
#define DATE_FORMAT "2016-12-01 13:22:26"

#define vlog(module, level, ...) __log(module, level, ##__VA_ARGS__);

#define LOG_MAX_FILE_SIZE (2 * 1024 * 1024)

void __log(char *module, int level, const char *fmt, ...);

/*
 * Don't free the return value!
 */
const char *pv_log_level_name(int level);

void pv_log_umount(void);

#endif