Linux往log中写日志

void writelog(const char* log)
{
	time_t tDate;
	struct tm* eventTime;
	time(&tDate);//得到系统当前时间
	//将time_数据类型转换为struct tm结构
	eventTime = localtime(&tDate);
	//年，以1900年作为起始值。如果当前年为1991，则year变量=1
	int year = eventTime->tm_year + 1900;
	//月：tm_mon从0开始计算
	int month = eventTime->tm_mon + 1;
	//日：
	int day = eventTime->tm_mday;
	//小时
	int hour = eventTime->tm_hour;
	//分钟
	int minute = eventTime->tm_min;
	//秒
	int second = eventTime->tm_sec;

	char sDate[16];
	sprintf(sDate, "%04d-%02d-%02d ", year,month,day);
	char sTime[16];
	sprintf(sTime, "%02d:%02d:%02d", hour, minute, second);
	char s[1024];
	sprintf(s, "%s %s %s\n", sDate, sTime, log);

	FILE* fp = fopen("my.log", "a+");
	if (fp==NULL)
	{
		printf("log write error :%s", strerror(errno));
	}
	else
	{
		fputs(s, fp);
		fclose(fp);
	}
	return;
}

原文地址：https://www.cnblogs.com/caoruipeng/p/11830734.html