2019独角兽企业重金招聘Python工程师标准>>> 
代码如下：
void timeCommand(redisClient *c)
{
struct timeval tv;
/* gettimeofday() can only fail if &tv is a bad address so we
* don't check for errors. */
gettimeofday(&tv,NULL);
addReplyMultiBulkLen(c,2);
addReplyBulkLongLong(c,tv.tv_sec);
addReplyBulkLongLong(c,tv.tv_usec);
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
逐一分析。
//自定义检查点: 1 2 3
struct timeval tv;
//定义变量
//自定义检查点: 1 2 3
/* gettimeofday() can only fail if &tv is a bad address so we
* don't check for errors. */
gettimeofday(&tv,NULL);
//获取当前时间
//自定义检查点: 1 2 3
addReplyMultiBulkLen(c,2);
//返回*2\r\n
addReplyBulkLongLong(c,tv.tv_sec);
//返回秒
addReplyBulkLongLong(c,tv.tv_usec);
//返回微秒
//自定义检查点: 1 2 3
具体的格式这里就不分析了，有兴趣自己用wireshark抓包就知道了！