linux c获取系统当前时间

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

int main() {
    // 获取当前时间的秒数
    time_t current_time = time(NULL);
    if (current_time == -1) {
        perror("time");
        return 1;
    }

    // 转换为本地时间结构体
    struct tm *local_tm = localtime(&current_time);
    if (local_tm == NULL) {
        perror("localtime");
        return 1;
    }

    // 转换为UTC时间结构体
    struct tm *utc_tm = gmtime(&current_time);
    if (utc_tm == NULL) {
        perror("gmtime");
        return 1;
    }

    // 格式化并打印本地时间
    char local_buffer[80];
    if (strftime(local_buffer, sizeof(local_buffer), "%Y-%m-%d %H:%M:%S", local_tm) == 0) {
        fprintf(stderr, "strftime failed
");
        return 1;
    }
    printf("Local time: %s
", local_buffer);

    // 格式化并打印UTC时间
    char utc_buffer[80];
    if (strftime(utc_buffer, sizeof(utc_buffer), "%Y-%m-%d %H:%M:%S", utc_tm) == 0) {
        fprintf(stderr, "strftime failed
");
        return 1;
    }
    printf("UTC time: %s
", utc_buffer);

    return 0;
}

gcc get_time.c -o get_time
./get_time