| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #include "log.h" | ||
| 2 | #include <stdio.h> | ||
| 3 | #include <stdlib.h> | ||
| 4 | #include <stdarg.h> | ||
| 5 | #include <string.h> | ||
| 6 | #include <pthread.h> | ||
| 7 | #include <time.h> | ||
| 8 | #include <stdatomic.h> | ||
| 9 | #include <unistd.h> | ||
| 10 | #include <sys/stat.h> | ||
| 11 | |||
| 12 | #define MAX_LOG_ENTRY_SIZE 1024 | ||
| 13 | |||
| 14 | /* Struttura per ciascun messaggio di log */ | ||
| 15 | typedef struct { | ||
| 16 | LogLevel level; | ||
| 17 | char message[MAX_LOG_ENTRY_SIZE]; | ||
| 18 | struct timespec timestamp; | ||
| 19 | } LogEntry; | ||
| 20 | |||
| 21 | /* Variabili statiche per la gestione del ring buffer e del logging */ | ||
| 22 | static LogEntry *log_buffer = NULL; | ||
| 23 | static atomic_size_t log_head; // indice di scrittura | ||
| 24 | static atomic_size_t log_tail; // indice di lettura | ||
| 25 | static size_t log_buffer_size = 0; | ||
| 26 | |||
| 27 | /* Variabili di configurazione */ | ||
| 28 | static LoggingConfig current_config; | ||
| 29 | static FILE *log_fp = NULL; | ||
| 30 | static pthread_t logger_thread; | ||
| 31 | static atomic_int logger_running = ATOMIC_VAR_INIT(0); | ||
| 32 | |||
| 33 | /* Variabili per il rollover */ | ||
| 34 | static struct timespec last_rollover; | ||
| 35 | static size_t current_file_size = 0; | ||
| 36 | |||
| 37 | /* Funzione di rollover: rinomina il file attuale e ne crea uno nuovo */ | ||
| 38 | ✗ | static void rollover_log_file(void) { | |
| 39 | ✗ | if (!(current_config.appender_flags & APPENDER_FILE)) | |
| 40 | ✗ | return; | |
| 41 | |||
| 42 | // Chiudi il file corrente | ||
| 43 | ✗ | if (log_fp) { | |
| 44 | ✗ | fclose(log_fp); | |
| 45 | ✗ | log_fp = NULL; | |
| 46 | } | ||
| 47 | |||
| 48 | // Costruisci il nome di backup con timestamp | ||
| 49 | char backup_filename[512]; | ||
| 50 | char timebuf[64]; | ||
| 51 | struct tm tm_info; | ||
| 52 | ✗ | localtime_r(&last_rollover.tv_sec, &tm_info); | |
| 53 | ✗ | strftime(timebuf, sizeof(timebuf), "%Y%m%d%H%M%S", &tm_info); | |
| 54 | ✗ | snprintf(backup_filename, sizeof(backup_filename), "%s.%s.bak", current_config.file, timebuf); | |
| 55 | |||
| 56 | // Rinomina il file attuale in backup | ||
| 57 | ✗ | rename(current_config.file, backup_filename); | |
| 58 | |||
| 59 | // Riapri un nuovo file di log | ||
| 60 | ✗ | log_fp = fopen(current_config.file, "a"); | |
| 61 | ✗ | current_file_size = 0; | |
| 62 | ✗ | clock_gettime(CLOCK_REALTIME, &last_rollover); | |
| 63 | } | ||
| 64 | |||
| 65 | /* Verifica se occorre effettuare il rollover in base a dimensione o intervallo */ | ||
| 66 | ✗ | static void check_rollover(const char *formatted_message) { | |
| 67 | ✗ | if (!(current_config.appender_flags & APPENDER_FILE)) | |
| 68 | ✗ | return; | |
| 69 | |||
| 70 | ✗ | int do_rollover = 0; | |
| 71 | ✗ | size_t msg_len = strlen(formatted_message); | |
| 72 | |||
| 73 | // Verifica la dimensione | ||
| 74 | ✗ | if (current_config.rollover_size > 0 && (current_file_size + msg_len) >= current_config.rollover_size) { | |
| 75 | ✗ | do_rollover = 1; | |
| 76 | } | ||
| 77 | // Verifica il rollover giornaliero | ||
| 78 | ✗ | if (current_config.rollover_daily) { | |
| 79 | time_t now_t; | ||
| 80 | ✗ | time(&now_t); | |
| 81 | struct tm now_tm, last_tm; | ||
| 82 | ✗ | localtime_r(&now_t, &now_tm); | |
| 83 | ✗ | localtime_r(&last_rollover.tv_sec, &last_tm); | |
| 84 | // Se il giorno dell'anno è cambiato, effettua il rollover | ||
| 85 | ✗ | if (now_tm.tm_yday != last_tm.tm_yday || now_tm.tm_year != last_tm.tm_year) { | |
| 86 | ✗ | do_rollover = 1; | |
| 87 | } | ||
| 88 | } | ||
| 89 | ✗ | if (do_rollover) { | |
| 90 | ✗ | rollover_log_file(); | |
| 91 | } | ||
| 92 | } | ||
| 93 | |||
| 94 | /* Funzione del thread di logging: estrae dal buffer e scrive sugli appender */ | ||
| 95 | ✗ | static void *logger_thread_func(void *arg) { | |
| 96 | (void)arg; | ||
| 97 | ✗ | clock_gettime(CLOCK_REALTIME, &last_rollover); | |
| 98 | ✗ | while (atomic_load(&logger_running) || (atomic_load(&log_head) != atomic_load(&log_tail))) { | |
| 99 | ✗ | size_t tail = atomic_load(&log_tail); | |
| 100 | ✗ | size_t head = atomic_load(&log_head); | |
| 101 | ✗ | if (tail == head) { | |
| 102 | /* Buffer vuoto: attesa breve per evitare busy-wait */ | ||
| 103 | ✗ | usleep(1000); | |
| 104 | ✗ | continue; | |
| 105 | } | ||
| 106 | ✗ | LogEntry entry = log_buffer[tail % log_buffer_size]; | |
| 107 | |||
| 108 | /* Formatta il timestamp */ | ||
| 109 | char timebuf[64]; | ||
| 110 | struct tm tm_info; | ||
| 111 | ✗ | localtime_r(&(entry.timestamp.tv_sec), &tm_info); | |
| 112 | ✗ | strftime(timebuf, sizeof(timebuf), "%Y-%m-%d %H:%M:%S", &tm_info); | |
| 113 | |||
| 114 | /* Costruisce il messaggio formattato */ | ||
| 115 | char formatted_message[2048]; | ||
| 116 | ✗ | if (current_config.format == LOG_FORMAT_PLAIN) { | |
| 117 | ✗ | snprintf(formatted_message, sizeof(formatted_message), | |
| 118 | "[%s.%03ld] [%d] %s\n", | ||
| 119 | ✗ | timebuf, entry.timestamp.tv_nsec / 1000000, entry.level, entry.message); | |
| 120 | } else { // LOG_FORMAT_JSON | ||
| 121 | ✗ | snprintf(formatted_message, sizeof(formatted_message), | |
| 122 | "{\"timestamp\": \"%s.%03ld\", \"level\": %d, \"message\": \"%s\"}\n", | ||
| 123 | ✗ | timebuf, entry.timestamp.tv_nsec / 1000000, entry.level, entry.message); | |
| 124 | } | ||
| 125 | |||
| 126 | /* Scrive sugli appender configurati */ | ||
| 127 | ✗ | if (current_config.appender_flags & APPENDER_FILE) { | |
| 128 | ✗ | check_rollover(formatted_message); | |
| 129 | ✗ | if (log_fp) { | |
| 130 | ✗ | fputs(formatted_message, log_fp); | |
| 131 | ✗ | fflush(log_fp); | |
| 132 | ✗ | current_file_size += strlen(formatted_message); | |
| 133 | } | ||
| 134 | } | ||
| 135 | ✗ | if (current_config.appender_flags & APPENDER_CONSOLE) { | |
| 136 | ✗ | fputs(formatted_message, stdout); | |
| 137 | } | ||
| 138 | ✗ | atomic_fetch_add(&log_tail, 1); | |
| 139 | } | ||
| 140 | ✗ | return NULL; | |
| 141 | } | ||
| 142 | |||
| 143 | /* Inizializza il modulo di logging */ | ||
| 144 | ✗ | int log_init(const LoggingConfig *config) { | |
| 145 | |||
| 146 | // Initialize last_rollover with the current time | ||
| 147 | ✗ | if (clock_gettime(CLOCK_REALTIME, &last_rollover) != 0) | |
| 148 | { | ||
| 149 | ✗ | perror("Failed to initialize last_rollover"); | |
| 150 | ✗ | return -1; | |
| 151 | } | ||
| 152 | |||
| 153 | ✗ | if (!config || config->file[0] == '\0') return -1; | |
| 154 | ✗ | current_config = *config; | |
| 155 | |||
| 156 | /* Alloca il buffer di log */ | ||
| 157 | ✗ | log_buffer_size = (config->buffer_size > 0) ? config->buffer_size : 1024; | |
| 158 | ✗ | log_buffer = malloc(sizeof(LogEntry) * log_buffer_size); | |
| 159 | ✗ | if (!log_buffer) | |
| 160 | ✗ | return -1; | |
| 161 | ✗ | atomic_init(&log_head, 0); | |
| 162 | ✗ | atomic_init(&log_tail, 0); | |
| 163 | |||
| 164 | /* Inizializza file di log se richiesto */ | ||
| 165 | ✗ | if (current_config.appender_flags & APPENDER_FILE) { | |
| 166 | ✗ | log_fp = fopen(current_config.file, "a"); | |
| 167 | ✗ | if (!log_fp) { | |
| 168 | ✗ | free(log_buffer); | |
| 169 | ✗ | return -1; | |
| 170 | } | ||
| 171 | /* Determina la dimensione corrente del file */ | ||
| 172 | struct stat st; | ||
| 173 | ✗ | if (stat(current_config.file, &st) == 0) { | |
| 174 | ✗ | current_file_size = st.st_size; | |
| 175 | } else { | ||
| 176 | ✗ | current_file_size = 0; | |
| 177 | } | ||
| 178 | } | ||
| 179 | |||
| 180 | ✗ | atomic_store(&logger_running, 1); | |
| 181 | ✗ | if (pthread_create(&logger_thread, NULL, logger_thread_func, NULL) != 0) { | |
| 182 | ✗ | if (log_fp) | |
| 183 | ✗ | fclose(log_fp); | |
| 184 | ✗ | free(log_buffer); | |
| 185 | ✗ | return -1; | |
| 186 | } | ||
| 187 | ✗ | return 0; | |
| 188 | } | ||
| 189 | |||
| 190 | /* Funzione per inviare messaggi di log */ | ||
| 191 | ✗ | void log_message(LogLevel level, const char *format, ...) { | |
| 192 | ✗ | if (level < current_config.level) return; | |
| 193 | |||
| 194 | ✗ | size_t head = atomic_load(&log_head); | |
| 195 | ✗ | size_t tail = atomic_load(&log_tail); | |
| 196 | /* Se il buffer è pieno, scarta il messaggio per non bloccare */ | ||
| 197 | ✗ | if (head - tail >= log_buffer_size) { | |
| 198 | ✗ | return; | |
| 199 | } | ||
| 200 | |||
| 201 | ✗ | LogEntry *entry = &log_buffer[head % log_buffer_size]; | |
| 202 | ✗ | entry->level = level; | |
| 203 | ✗ | clock_gettime(CLOCK_REALTIME, &entry->timestamp); | |
| 204 | |||
| 205 | va_list args; | ||
| 206 | ✗ | va_start(args, format); | |
| 207 | ✗ | vsnprintf(entry->message, MAX_LOG_ENTRY_SIZE, format, args); | |
| 208 | ✗ | va_end(args); | |
| 209 | |||
| 210 | ✗ | atomic_fetch_add(&log_head, 1); | |
| 211 | } | ||
| 212 | |||
| 213 | /* Chiude il modulo di logging e libera le risorse */ | ||
| 214 | ✗ | void log_shutdown(void) { | |
| 215 | ✗ | atomic_store(&logger_running, 0); | |
| 216 | ✗ | pthread_join(logger_thread, NULL); | |
| 217 | ✗ | if (log_buffer) { | |
| 218 | ✗ | free(log_buffer); | |
| 219 | ✗ | log_buffer = NULL; | |
| 220 | } | ||
| 221 | ✗ | if (log_fp) { | |
| 222 | ✗ | fclose(log_fp); | |
| 223 | ✗ | log_fp = NULL; | |
| 224 | } | ||
| 225 | ✗ | } | |
| 226 |