mirror of
https://github.com/Theldus/alertik.git
synced 2024-11-21 23:43:23 +01:00
119 lines
2.4 KiB
C
119 lines
2.4 KiB
C
/*
|
|
* Alertik: a tiny 'syslog' server & notification tool for Mikrotik routers.
|
|
* This is free and unencumbered software released into the public domain.
|
|
*/
|
|
|
|
#include <fcntl.h>
|
|
#include <pthread.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <time.h>
|
|
|
|
#include "events.h"
|
|
#include "log.h"
|
|
|
|
/*
|
|
* Alertik's log routines
|
|
*/
|
|
|
|
static pthread_mutex_t log_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
static int curr_file;
|
|
|
|
/* There should *always* be a corresponding close_log_file() call. */
|
|
static inline void open_log_file(void)
|
|
{
|
|
struct stat sb;
|
|
pthread_mutex_lock(&log_mutex);
|
|
if (curr_file == STDOUT_FILENO)
|
|
return;
|
|
|
|
if (stat("log", &sb) < 0) {
|
|
if (mkdir("log", 0755) < 0)
|
|
return;
|
|
}
|
|
curr_file = openat(AT_FDCWD, LOG_FILE,
|
|
O_WRONLY|O_CREAT|O_APPEND, 0666);
|
|
|
|
if (curr_file < 0)
|
|
curr_file = STDOUT_FILENO; /* fallback to stdout if can't open. */
|
|
}
|
|
|
|
/* This should *always* be called *after* a call to open_log_file(). */
|
|
static void close_log_file(void)
|
|
{
|
|
if (curr_file || curr_file == STDOUT_FILENO)
|
|
goto out;
|
|
fsync(curr_file);
|
|
close(curr_file);
|
|
out:
|
|
pthread_mutex_unlock(&log_mutex);
|
|
}
|
|
|
|
/**
|
|
* @brief Format the current time passed as @p time
|
|
* into the buffer @p time_str.
|
|
*
|
|
* @param time Time to be formated as string.
|
|
* @param time_str Output buffer.
|
|
*
|
|
* @return Returns the output buffer.
|
|
*/
|
|
char *get_formatted_time(time_t time, char *time_str)
|
|
{
|
|
strftime(
|
|
time_str,
|
|
32,
|
|
"%Y-%m-%d %H:%M:%S",
|
|
localtime(&time)
|
|
);
|
|
return time_str;
|
|
}
|
|
|
|
/**
|
|
* @brief Receives a formated string and outputs to stdout
|
|
* with the current timestamp.
|
|
*
|
|
* @param fmt String format.
|
|
*/
|
|
void log_msg(const char *fmt, ...)
|
|
{
|
|
char time_str[32] = {0};
|
|
va_list ap;
|
|
|
|
open_log_file();
|
|
dprintf(curr_file, "[%s] ", get_formatted_time(time(NULL), time_str));
|
|
va_start(ap, fmt);
|
|
vdprintf(curr_file, fmt, ap);
|
|
va_end(ap);
|
|
close_log_file();
|
|
}
|
|
|
|
/**
|
|
* @brief For a given log event @p ev, print the log event
|
|
* into the log file (wheter stdout or an actual file).
|
|
*
|
|
* @param ev Log event to be printed.
|
|
*/
|
|
void print_log_event(struct log_event *ev)
|
|
{
|
|
char time_str[32] = {0};
|
|
open_log_file();
|
|
dprintf(curr_file, "\n[%s] %s\n",
|
|
get_formatted_time(ev->timestamp, time_str), ev->msg);
|
|
close_log_file();
|
|
}
|
|
|
|
/**
|
|
* @brief Initializes the logging routines.
|
|
*/
|
|
void log_init(void) {
|
|
atexit(close_log_file);
|
|
#ifndef USE_FILE_AS_LOG
|
|
curr_file = STDOUT_FILENO;
|
|
#endif
|
|
}
|