linux 下系统时间设置C语言实现

#include <stdio.h>

#include <stdlib.h>

#include <time.h>

#include <sys/time.h>

#include <unistd.h>

void main()

{

    printf("before time set");

        fflush(stdout);

        system("date");

    system("hwclock");

    TimeSet(2012,10,10,1,30,8);

    system("hwclock -w");

    printf("after time set");

        fflush(stdout);

        system("date");

    system("hwclock");

}

void TimeSet(int year,int month,int day,int hour,int min,int sec)

{

    struct tm tptr;

    struct timeval tv;

    tptr.tm_year = year - 1900;

    tptr.tm_mon = month - 1;

    tptr.tm_mday = day;

    tptr.tm_hour = hour;

    tptr.tm_min = min;

    tptr.tm_sec = sec;

    tv.tv_sec = mktime(&tptr);

    tv.tv_usec = 0;

    settimeofday(&tv, NULL);

}