linux时间设置函数化（修改）

main.cpp

#include "settime.h"
#include <QtCore/QCoreApplication>
#include <QString>
#include <sys/time.h>
#include <unistd.h>
#include <QDebug>

int gettimeofday(struct timeval *tv, struct timezone *tz);
int settimeofday(const struct timeval *tv, const struct timezone *tz);
int SetSystemTime(int, int, int, int, int, int);

int main(int argc, char *argv[])
{
   QCoreApplication a(argc, argv);
   QTextStream out (stdout);
   if (argc < 3)
   {
	   out<<"Usage : timeset XXXX-XX-XX XX:XX:XX"<<endl;
	   exit(0);
   }

        int nyear;
	int nmonth;
	int nday;
	int nhour;
	int nminute;
	int nsecond;
   const char *s_ctime = "settime";
   const char *s_cinTime = argv[0];
   
   QString timer =QString::fromLocal8Bit(*argv,128); 

   if (QString::compare(s_ctime,s_cinTime)==0) 
   {
        bool ok;
        QString year= timer.mid(8, 4); 
        QString month = timer.mid(13,2);
		QString day = timer.mid(16,2);
		QString hour = timer.mid(19,2);
		QString second = timer.mid(22,2);
		QString minute = timer.mid(25,2);
		nyear = year.toInt(&ok,10);
		nmonth = month.toInt(&ok,10);
		nday = day.toInt(&ok,10);
		nhour = hour.toInt(&ok,10);
		nminute = minute.toInt(&ok,10);
		nsecond = second.toInt(&ok,10);
   }

   SetSystemTime(nyear,nmonth,nday,nhour,nminute,nsecond);
   time_t timep;
   time (&timep);
   qDebug()<<"Now the time is :"<<asctime(gmtime(&timep));
   return a.exec();   
 }

　　settime.cpp

#include "settime.h"
#include <sys/time.h>
#include <unistd.h>
#include <QDebug>
int SetSystemTime(int year,int month,int day,int hour, int minute,int second)
{
	struct rtc_time tm;

	struct tm _tm;
	struct timeval tv;
	time_t timep;
	_tm.tm_sec = second;
	_tm.tm_min = minute;
	_tm.tm_hour = hour;
	_tm.tm_mday = day;
	_tm.tm_mon = month - 1;
	_tm.tm_year = year - 1900;

	timep = mktime(&_tm);
	tv.tv_sec = timep;
	tv.tv_usec = 0;
	if(settimeofday (&tv, (struct timezone *) 0) < 0)
	{
		printf("Set system datatime error!\n");
		return -1;
	}
	return 0;
} 

　　settime.h

#ifndef SETTIME_H
#define SETTIME_H
 
struct rtc_time
 {
	int tm_sec;
	int tm_min;
	int tm_hour;
	int tm_mday;
	int tm_mon;
	int tm_year;
	int tm_wday;
	int tm_yday;
	int tm_isdst;
};
#endif 

运行结果：