log.c

/*
  +----------------------------------------------------------------------+
  | PHP Version 7                                                        |
  +----------------------------------------------------------------------+
  | Copyright (c) 1997-2016 The PHP Group                                |
  +----------------------------------------------------------------------+
  | This source file is subject to version 3.01 of the PHP license,      |
  | that is bundled with this package in the file LICENSE, and is        |
  | available through the world-wide-web at the following url:           |
  | http://www.php.net/license/3_01.txt                                  |
  | If you did not receive a copy of the PHP license and are unable to   |
  | obtain it through the world-wide-web, please send a note to          |
  | license@php.net so we can mail you a copy immediately.               |
  +----------------------------------------------------------------------+
  | Author: maben <www.maben@foxmail.com>                                |
  +----------------------------------------------------------------------+
*/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include "log.h"

static char *cfc_error_titles[CFC_LOG_LEVEL_ERROR + 1] = {
	"DEBUG", "NOTICE", "WARN", "ERROR"
};

static int cfc_log_fd = 0;
static int cfc_log_mark = CFC_LOG_LEVEL_DEBUG;
static int cfc_log_initialize = 0;
static char cfc_log_buffer[4096];


int cfc_init_log(char *file, int mark)
{
	if (cfc_log_initialize) {
		return 0;
	}

	if (mark < CFC_LOG_LEVEL_DEBUG
			|| mark > CFC_LOG_LEVEL_ERROR)
	{
		return -1;
	}

	if (file) {
		cfc_log_fd = open(file, O_WRONLY | O_CREAT | O_APPEND , 0666);
		if (!cfc_log_fd) {
			return -1;
		}

	} else {
		dup2(cfc_log_fd, STDERR_FILENO);
	}

	cfc_log_mark = mark;
	cfc_log_initialize = 1;

	return 0;
}


void cfc_log(int level, char *fmt, ...)
{
	va_list al;
	time_t current;
	struct tm *dt;
	int off1, off2;

	if (!cfc_log_initialize
			|| level < cfc_log_mark
			|| level > CFC_LOG_LEVEL_ERROR)
	{
		return;
	}

	/* Get current date and time */
	time(&current);
	dt = localtime(&current);

	off1 = sprintf(cfc_log_buffer,
			"[%04d-%02d-%02d %02d:%02d:%02d] %s: ",
			dt->tm_year + 1900,
			dt->tm_mon + 1,
			dt->tm_mday,
			dt->tm_hour,
			dt->tm_min,
			dt->tm_sec,
			cfc_error_titles[level]);

	va_start(al, fmt);
	off2 = vsprintf(cfc_log_buffer + off1, fmt, al);
	va_end(al);

	cfc_log_buffer[off1 + off2] = '\n';

	write(cfc_log_fd, cfc_log_buffer, off1 + off2 + 1);
}

void cfc_destroy_log()
{
	if (!cfc_log_initialize) {
		return;
	}

	if (cfc_log_fd && cfc_log_fd != STDERR_FILENO) {
		close(cfc_log_fd);
	}
}

int cfc_log_get_fd()
{
	return cfc_log_fd;
}

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 * vim600: noet sw=4 ts=4 fdm=marker
 * vim<600: noet sw=4 ts=4
 */