Linux 修改系统时间 需要Root权限

#include <sys/time.h>

#include <unistd.h>

#include <stdio.h>

void setSystemTime(long timep)

{

struct timeval tv;

tv.tv_sec = (time_t)timep;

tv.tv_usec = 0;

if(settimeofday (&tv, (struct timezone *) 0) < 0)

{

printf("Set system datatime error!/n");

//return -1;

}

}

void main()

{

long date = 1459157400L;

time_t time_p;

struct tm * tmp_tm;

time(&time_p);

tmp_tm = localtime(&time_p);

printf("time1=%s\n",asctime(tmp_tm));

setSystemTime(date);

time(&time_p);

tmp_tm = localtime(&time_p);

printf("time2=%s\n",asctime(tmp_tm));

printf("end of main\n");

}