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;
 }