#include <stdio.h>#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>int main() {	int fd;	unsigned char rtc_tm[6];    fd = open("/dev/atop_rtc", O_RDWR);    memset(rtc_tm, 0, 6);	read(fd, rtc_tm, 6);	printf("20%02x/%02x/%02x %02x:%02x:%02x\n", rtc_tm[0], rtc_tm[1], rtc_tm[2],		rtc_tm[3], rtc_tm[4], rtc_tm[5]);	close(fd);	return 0;}