/*********************************************************************************
|
* Copyright: (C) 2022 LingYun IoT System Studio
|
* All rights reserved.
|
*
|
* Filename: logger.c
|
* Description: This file
|
*
|
* Version: 1.0.0(15/04/22)
|
* Author: LingYun <lingyun@email.com>
|
* ChangeLog: 1, Release initial version on "15/04/22 10:38:49"
|
*
|
********************************************************************************/
|
|
#include <stdio.h>
|
#include <errno.h>
|
#include <time.h>
|
#include <stdarg.h>
|
#include <string.h>
|
#include "logger.h"
|
|
/*
|
* Program name variable is provided by the libc
|
*/
|
extern const char* __progname;
|
#define PROGRAM_NAME __progname
|
|
/*
|
* Logger internal sctructure
|
*/
|
typedef struct logger_s {
|
FILE *fp;
|
int loglevel;
|
int use_stdout;
|
} logger_t;
|
|
static struct logger_s g_logger;
|
|
static const char* LOG_LEVELS[] = {
|
LOG_STRING_ERROR,
|
LOG_STRING_WARN,
|
LOG_STRING_INFO,
|
LOG_STRING_DEBUG
|
};
|
|
/*
|
* initial logger system
|
*/
|
int logger_init(char *filename, int loglevel)
|
{
|
logger_term();
|
|
g_logger.loglevel = loglevel>LOG_LEVEL_MAX ? LOG_LEVEL_MAX : loglevel;
|
|
/* $filename is NULL or match "stdout" will use standard output */
|
if( !filename || !strcasecmp(filename, "stdout"))
|
{
|
g_logger.use_stdout = 1;
|
g_logger.fp = stderr;
|
}
|
else
|
{
|
g_logger.use_stdout = 0;
|
g_logger.fp = fopen(filename, "a");
|
if( !g_logger.fp )
|
{
|
fprintf(stderr, "Failed to open file '%s': %s", filename, strerror(errno));
|
return -1;
|
}
|
}
|
|
return 0;
|
}
|
|
/*
|
* terminate logger system
|
*/
|
void logger_term(void)
|
{
|
if( !g_logger.fp )
|
{
|
return ;
|
}
|
|
if( !g_logger.use_stdout )
|
{
|
fclose(g_logger.fp);
|
}
|
|
g_logger.use_stdout = 0;
|
g_logger.fp = NULL;
|
|
return ;
|
}
|
|
|
/*
|
* Logging functions
|
*/
|
void log_generic(const int level, const char* format, va_list args)
|
{
|
char message[256];
|
struct tm* current_tm;
|
time_t time_now;
|
|
vsprintf(message, format, args);
|
|
time(&time_now);
|
current_tm = localtime(&time_now);
|
|
int res = fprintf(g_logger.fp,
|
"<%s> %02i:%02i:%02i [%s] %s"
|
, PROGRAM_NAME
|
, current_tm->tm_hour
|
, current_tm->tm_min
|
, current_tm->tm_sec
|
, LOG_LEVELS[level]
|
, message );
|
|
fflush(g_logger.fp);
|
}
|
|
void log_error(char *format, ...)
|
{
|
va_list args;
|
va_start(args, format);
|
log_generic(LOG_LEVEL_ERROR, format, args);
|
va_end(args);
|
}
|
|
void log_warn(char *format, ...)
|
{
|
if (g_logger.loglevel < LOG_LEVEL_WARN) {
|
return;
|
}
|
|
va_list args;
|
va_start(args, format);
|
log_generic(LOG_LEVEL_WARN, format, args);
|
va_end(args);
|
}
|
|
void log_info(char *format, ...)
|
{
|
if (g_logger.loglevel < LOG_LEVEL_INFO) {
|
return;
|
}
|
|
va_list args;
|
va_start(args, format);
|
log_generic(LOG_LEVEL_INFO, format, args);
|
va_end(args);
|
}
|
|
void log_debug(char *format, ...)
|
{
|
if (g_logger.loglevel < LOG_LEVEL_DEBUG) {
|
return;
|
}
|
|
va_list args;
|
va_start(args, format);
|
log_generic(LOG_LEVEL_DEBUG, format, args);
|
va_end(args);
|
}
|
