mirror of
https://gitlab.xiph.org/xiph/icecast-common.git
synced 2024-11-03 04:17:20 -05:00
423 lines
9.1 KiB
C
423 lines
9.1 KiB
C
/*
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** Logging framework.
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**
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** This program is distributed under the GNU General Public License, version 2.
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** A copy of this license is included with this source.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <time.h>
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifndef _WIN32
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#include <pthread.h>
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#else
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#include <windows.h>
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#endif
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#include "log.h"
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#define LOG_MAXLOGS 25
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#define LOG_MAXLINELEN 1024
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#ifdef _WIN32
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#define mutex_t CRITICAL_SECTION
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#define snprintf _snprintf
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#define vsnprintf _vsnprintf
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#else
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#define mutex_t pthread_mutex_t
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#endif
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static mutex_t _logger_mutex;
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static int _initialized = 0;
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typedef struct log_tag
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{
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int in_use;
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unsigned level;
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char *filename;
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FILE *logfile;
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off_t size;
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off_t trigger_level;
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int archive_timestamp;
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char *buffer;
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} log_t;
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static log_t loglist[LOG_MAXLOGS];
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static int _get_log_id(void);
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static void _release_log_id(int log_id);
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static void _lock_logger(void);
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static void _unlock_logger(void);
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static int _log_open (int id, const char *file_timestamp)
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{
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if (loglist [id] . in_use == 0)
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return 0;
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/* check for cases where an open of the logfile is wanted */
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if (loglist [id] . logfile == NULL ||
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(loglist [id] . trigger_level && loglist [id] . size > loglist [id] . trigger_level))
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{
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if (loglist [id] . filename) /* only re-open files where we have a name */
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{
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struct stat st;
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if (loglist [id] . logfile)
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{
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char new_name [4096];
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fclose (loglist [id] . logfile);
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loglist [id] . logfile = NULL;
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/* simple rename, but could use time providing locking were used */
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if (loglist[id].archive_timestamp && file_timestamp) {
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snprintf (new_name, sizeof(new_name), "%s.%s", loglist[id].filename, file_timestamp);
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}
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else {
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snprintf (new_name, sizeof(new_name), "%s.old", loglist [id] . filename);
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}
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#ifdef _WIN32
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if (stat (new_name, &st) == 0)
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remove (new_name);
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#endif
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rename (loglist [id] . filename, new_name);
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}
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loglist [id] . logfile = fopen (loglist [id] . filename, "a");
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if (loglist [id] . logfile == NULL)
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return 0;
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setvbuf (loglist [id] . logfile, NULL, IO_BUFFER_TYPE, 0);
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if (stat (loglist [id] . filename, &st) < 0)
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loglist [id] . size = 0;
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else
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loglist [id] . size = st.st_size;
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}
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else
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loglist [id] . size = 0;
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}
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return 1;
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}
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void log_initialize(void)
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{
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int i;
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if (_initialized) return;
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for (i = 0; i < LOG_MAXLOGS; i++) {
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loglist[i].in_use = 0;
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loglist[i].level = 2;
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loglist[i].size = 0;
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loglist[i].trigger_level = 1000000000;
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loglist[i].filename = NULL;
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loglist[i].logfile = NULL;
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loglist[i].buffer = NULL;
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}
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/* initialize mutexes */
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#ifndef _WIN32
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pthread_mutex_init(&_logger_mutex, NULL);
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#else
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InitializeCriticalSection(&_logger_mutex);
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#endif
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_initialized = 1;
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}
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int log_open_file(FILE *file)
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{
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int log_id;
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if(file == NULL) return LOG_EINSANE;
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log_id = _get_log_id();
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if (log_id < 0) return LOG_ENOMORELOGS;
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loglist[log_id].logfile = file;
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loglist[log_id].filename = NULL;
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loglist[log_id].size = 0;
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return log_id;
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}
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int log_open(const char *filename)
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{
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int id;
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FILE *file;
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if (filename == NULL) return LOG_EINSANE;
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if (strcmp(filename, "") == 0) return LOG_EINSANE;
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file = fopen(filename, "a");
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id = log_open_file(file);
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if (id >= 0)
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{
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struct stat st;
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setvbuf (loglist [id] . logfile, NULL, IO_BUFFER_TYPE, 0);
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loglist [id] . filename = strdup (filename);
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if (stat (loglist [id] . filename, &st) == 0)
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loglist [id] . size = st.st_size;
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}
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return id;
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}
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/* set the trigger level to trigger, represented in kilobytes */
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void log_set_trigger(int id, unsigned trigger)
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{
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if (id >= 0 && id < LOG_MAXLOGS && loglist [id] . in_use)
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{
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loglist [id] . trigger_level = trigger*1024;
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}
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}
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int log_set_filename(int id, const char *filename)
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{
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if (id < 0 || id >= LOG_MAXLOGS)
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return LOG_EINSANE;
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if (!strcmp(filename, "") || loglist [id] . in_use == 0)
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return LOG_EINSANE;
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_lock_logger();
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if (loglist [id] . filename)
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free (loglist [id] . filename);
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if (filename)
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loglist [id] . filename = strdup (filename);
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else
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loglist [id] . filename = NULL;
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_unlock_logger();
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return id;
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}
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int log_set_archive_timestamp(int id, int value)
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{
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if (id < 0 || id >= LOG_MAXLOGS)
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return LOG_EINSANE;
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_lock_logger();
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loglist[id].archive_timestamp = value;
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_unlock_logger();
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return id;
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}
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int log_open_with_buffer(const char *filename, int size)
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{
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/* not implemented */
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return LOG_ENOTIMPL;
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}
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void log_set_level(int log_id, unsigned level)
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{
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if (log_id < 0 || log_id >= LOG_MAXLOGS) return;
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if (loglist[log_id].in_use == 0) return;
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loglist[log_id].level = level;
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}
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void log_flush(int log_id)
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{
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if (log_id < 0 || log_id >= LOG_MAXLOGS) return;
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if (loglist[log_id].in_use == 0) return;
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_lock_logger();
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if (loglist[log_id].logfile)
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fflush(loglist[log_id].logfile);
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_unlock_logger();
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}
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void log_reopen(int log_id)
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{
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if (log_id < 0 && log_id >= LOG_MAXLOGS)
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return;
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if (loglist [log_id] . filename && loglist [log_id] . logfile)
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{
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_lock_logger();
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fclose (loglist [log_id] . logfile);
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loglist [log_id] . logfile = NULL;
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_unlock_logger();
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}
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}
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void log_close(int log_id)
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{
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if (log_id < 0 || log_id >= LOG_MAXLOGS) return;
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_lock_logger();
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if (loglist[log_id].in_use == 0)
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{
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_unlock_logger();
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return;
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}
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loglist[log_id].in_use = 0;
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loglist[log_id].level = 2;
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if (loglist[log_id].filename) free(loglist[log_id].filename);
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if (loglist[log_id].buffer) free(loglist[log_id].buffer);
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if (loglist [log_id] . logfile)
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{
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fclose (loglist [log_id] . logfile);
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loglist [log_id] . logfile = NULL;
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}
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_unlock_logger();
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}
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void log_shutdown(void)
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{
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/* destroy mutexes */
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#ifndef _WIN32
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pthread_mutex_destroy(&_logger_mutex);
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#else
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DeleteCriticalSection(&_logger_mutex);
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#endif
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_initialized = 0;
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}
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void log_write(int log_id, unsigned priority, const char *cat, const char *func,
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const char *fmt, ...)
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{
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static char *prior[] = { "EROR", "WARN", "INFO", "DBUG" };
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char tyme[128];
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char filename_tyme[128];
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char pre[256];
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char line[LOG_MAXLINELEN];
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time_t now;
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va_list ap;
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if (log_id < 0) return;
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if (log_id > LOG_MAXLOGS) return; /* Bad log number */
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if (loglist[log_id].level < priority) return;
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if (priority > sizeof(prior)/sizeof(prior[0])) return; /* Bad priority */
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va_start(ap, fmt);
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vsnprintf(line, LOG_MAXLINELEN, fmt, ap);
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now = time(NULL);
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_lock_logger();
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strftime(tyme, sizeof (tyme), "[%Y-%m-%d %H:%M:%S]", localtime(&now));
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strftime(filename_tyme, sizeof (filename_tyme), "%Y%m%d_%H%M%S", localtime(&now));
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snprintf(pre, sizeof (pre), "%s %s%s", prior[priority-1], cat, func);
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if (_log_open (log_id, filename_tyme))
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{
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int len = fprintf (loglist[log_id].logfile, "%s %s %s\n", tyme, pre, line);
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if (len > 0)
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loglist[log_id].size += len;
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}
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_unlock_logger();
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va_end(ap);
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}
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void log_write_direct(int log_id, const char *fmt, ...)
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{
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char line[LOG_MAXLINELEN];
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va_list ap;
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char filename_tyme[128];
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time_t now;
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if (log_id < 0) return;
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va_start(ap, fmt);
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now = time(NULL);
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_lock_logger();
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vsnprintf(line, LOG_MAXLINELEN, fmt, ap);
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strftime(filename_tyme, sizeof (filename_tyme), "%Y%m%d_%H%M%S", localtime(&now));
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if (_log_open (log_id, filename_tyme))
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{
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int len = fprintf(loglist[log_id].logfile, "%s\n", line);
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if (len > 0)
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loglist[log_id].size += len;
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}
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_unlock_logger();
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va_end(ap);
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fflush(loglist[log_id].logfile);
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}
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static int _get_log_id(void)
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{
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int i;
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int id = -1;
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/* lock mutex */
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_lock_logger();
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for (i = 0; i < LOG_MAXLOGS; i++)
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if (loglist[i].in_use == 0) {
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loglist[i].in_use = 1;
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id = i;
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break;
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}
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/* unlock mutex */
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_unlock_logger();
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return id;
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}
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static void _release_log_id(int log_id)
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{
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/* lock mutex */
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_lock_logger();
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loglist[log_id].in_use = 0;
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/* unlock mutex */
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_unlock_logger();
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}
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static void _lock_logger(void)
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{
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#ifndef _WIN32
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pthread_mutex_lock(&_logger_mutex);
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#else
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EnterCriticalSection(&_logger_mutex);
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#endif
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}
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static void _unlock_logger(void)
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{
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#ifndef _WIN32
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pthread_mutex_unlock(&_logger_mutex);
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#else
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LeaveCriticalSection(&_logger_mutex);
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#endif
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}
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