修改文件日期,可以修改到很早的日期

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <utime.h>
#include <time.h>


int main(){
        int ret;struct utimbuf times = {0};
        time_t cur_sec;
        time(&cur_sec);
        printf("%ti\n",cur_sec);
        times.actime = cur_sec-86400 ;
        printf("%ti\n",times.actime);
        times.modtime = cur_sec-86400;
        ret = utime("./test.txt", &times);

        exit(0);
}