Linux获取系统当前时间

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#include <time.h>
void get_time()
{
    timespec time;
    clock_gettime(CLOCK_REALTIME, &time);  //获取相对于1970到现在的秒数
    tm nowTime;
    localtime_r(&time.tv_sec, &nowTime);
    char current[1024];
    sprintf(current, "%04d%02d%02d%02d:%02d:%02d", nowTime.tm_year + 1900, nowTime.tm_mon+1, nowTime.tm_mday,
            nowTime.tm_hour, nowTime.tm_min, nowTime.tm_sec);
}