linux c 设置utc时间

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

int main() {
    struct timeval tv;
    struct timezone tz;

    // 获取当前UTC时间
    gettimeofday(&tv, &tz);

    // 设置新的UTC时间（例如，设置为2023年4月1日0时0分0秒）
    tv.tv_sec = 1680316800; // 2023-04-01 00:00:00 UTC的时间戳
    tv.tv_usec = 0;

    if (settimeofday(&tv, &tz) == -1) {
        perror("settimeofday");
        exit(EXIT_FAILURE);
    }

    printf("UTC time has been set successfully.\n");
    return 0;
}

#include <time.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
    time_t t = 1680316800; // 2023-04-01 00:00:00 UTC的时间戳

    if (stime(&t) == -1) {
        perror("stime");
        exit(EXIT_FAILURE);
    }

    printf("UTC time has been set successfully.\n");
    return 0;
}