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/* logger.c
*
* Copyright (C) 2013 Tox project All Rights Reserved.
*
* This file is part of Tox.
*
* Tox is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Tox 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Tox. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include "logger.h"
#include "crypto_core.h" /* for random_int() */
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <stdarg.h>
#include <inttypes.h>
#include <time.h>
#include <pthread.h>
#if defined(_WIN32) || defined(__WIN32__) || defined (WIN32)
# define getpid() ((unsigned) GetCurrentProcessId())
# define SFILE(FILE__M) (strrchr(FILE__M, '\\') ? strrchr(FILE__M, '\\') + 1 : FILE__M)
#else
# define SFILE(FILE__M) (strrchr(FILE__M, '/') ? strrchr(FILE__M, '/') + 1 : FILE__M)
#endif
typedef struct logger {
FILE *log_file;
LOG_LEVEL level;
uint64_t start_time; /* Time when lib loaded */
char *id;
/* Allocate these once */
char *tstr;
char *posstr;
char *msg;
/* For thread synchronisation */
pthread_mutex_t mutex[1];
} logger;
logger *global = NULL;
const char *LOG_LEVEL_STR [] = {
[LOG_TRACE] = "TRACE",
[LOG_DEBUG] = "DEBUG",
[LOG_INFO] = "INFO" ,
[LOG_WARNING] = "WARN" ,
[LOG_ERROR] = "ERROR",
};
char *strtime(char *dest, size_t max_len)
{
time_t timer;
struct tm *tm_info;
time(&timer);
tm_info = localtime(&timer);
strftime(dest, max_len, "%m:%d %H:%M:%S", tm_info);
return dest;
}
/**
* Public Functions
*/
logger *logger_new (const char *file_name, LOG_LEVEL level, const char *id)
{
#ifndef LOGGING /* Disabled */
return NULL;
#endif
logger *retu = calloc(1, sizeof(logger));
if (!retu)
return NULL;
if ( pthread_mutex_init(retu->mutex, NULL) != 0 ) {
free(retu);
return NULL;
}
if (!(retu->log_file = fopen(file_name, "ab"))) {
fprintf(stderr, "Error opening logger file: %s; info: %s\n", file_name, strerror(errno));
free(retu);
pthread_mutex_destroy(retu->mutex);
return NULL;
}
if (!(retu->tstr = calloc(16, sizeof (char))) ||
!(retu->posstr = calloc(300, sizeof (char))) ||
!(retu->msg = calloc(4096, sizeof (char))) )
goto ERROR;
if (id) {
if (!(retu->id = calloc(strlen(id) + 1, 1)))
goto ERROR;
strcpy(retu->id, id);
} else {
if (!(retu->id = malloc(8)))
goto ERROR;
snprintf(retu->id, 8, "%u", random_int());
}
retu->level = level;
retu->start_time = current_time_monotonic();
fprintf(retu->log_file, "Successfully created and running logger id: %s; time: %s\n",
retu->id, strtime(retu->tstr, 16));
return retu;
ERROR:
fprintf(stderr, "Failed to create logger!\n");
pthread_mutex_destroy(retu->mutex);
fclose(retu->log_file);
free(retu->tstr);
free(retu->posstr);
free(retu->msg);
free(retu->id);
free(retu);
return NULL;
}
void logger_kill(logger *log)
{
#ifndef LOGGING /* Disabled */
return;
#endif
if (!log)
return;
pthread_mutex_lock(log->mutex);
free(log->id);
free(log->tstr);
free(log->posstr);
free(log->msg);
if (fclose(log->log_file) != 0 )
perror("Could not close log file");
pthread_mutex_unlock(log->mutex);
pthread_mutex_destroy(log->mutex);
free(log);
}
void logger_kill_global(void)
{
logger_kill(global);
global = NULL;
}
void logger_set_global(logger *log)
{
#ifndef LOGGING /* Disabled */
return;
#endif
global = log;
}
logger *logger_get_global(void)
{
#ifndef LOGGING /* Disabled */
return NULL;
#endif
return global;
}
void logger_write (logger *log, LOG_LEVEL level, const char *file, int line, const char *format, ...)
{
#ifndef LOGGING /* Disabled */
return;
#endif
static const char *logger_format =
"%s " /* Logger id string */
"%-16s" /* Time string of format: %m:%d %H:%M:%S */
"%u " /* Thread id */
"%-5s " /* Logger lever string */
"%-20s " /* File:line string */
"- %s" /* Output message */
"\n"; /* Every new print new line */
logger *this_log = log ? log : global;
if (!this_log)
return;
/* Don't print levels lesser than set one */
if (this_log->level > level)
return;
pthread_mutex_lock(this_log->mutex);
/* Set position str */
snprintf(this_log->posstr, 300, "%s:%d", SFILE(file), line);
/* Set message */
va_list args;
va_start (args, format);
vsnprintf(this_log->msg, 4096, format, args);
va_end (args);
fprintf(this_log->log_file, logger_format, this_log->id, strtime(this_log->tstr, 16), pthread_self(),
LOG_LEVEL_STR[level], this_log->posstr, this_log->msg);
fflush(this_log->log_file);
pthread_mutex_unlock(this_log->mutex);
}
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