Linux获取系统当前时间（精确到毫秒）

    #include <stdio.h>
    #include <time.h>
    #include <sys/time.h>  

    void sysLocalTime()
    {
        time_t             timesec;
        struct tm         *p;  

        time(×ec);
        p = localtime(×ec);  

        printf("%d%d%d%d%d%d\n", 1900+p->tm_year, 1+p->tm_mon, p->tm_mday, p->tm_hour, p->tm_min, p->tm_sec);  

    }  

    void sysUsecTime()
    {
        struct timeval    tv;
        struct timezone tz;  

        struct tm         *p;  

        gettimeofday(&tv, &tz);
        printf("tv_sec:%ld\n",tv.tv_sec);
        printf("tv_usec:%ld\n",tv.tv_usec);
        printf("tz_minuteswest:%d\n",tz.tz_minuteswest);
        printf("tz_dsttime:%d\n",tz.tz_dsttime);  

        p = localtime(&tv.tv_sec);
        printf("time_now:%d%d%d%d%d%d.%ld\n", 1900+p->tm_year, 1+p->tm_mon, p->tm_mday, p->tm_hour, p->tm_min, p->tm_sec, tv.tv_usec);
    }  

    int main(void)
    {
        sysLocalTime();
        printf("============gettimeofday==============\n");  

        sysUsecTime();  

        return 0;
    }