linux下获取系统时间 和 时间偏移

获取linux时间  并计算时间偏移

void getSystemTimer(void)

{

#if 0

char *wdate[]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"} ;

time_t timep;

struct tm *p;

time(&timep);

p=gmtime(&timep);

printf(" ************************* %d:%d:%d ************************** ", p->tm_hour, p->tm_min, p->tm_sec);

#endif

static char flag=0;

static long lastsecond = 0 ; //old

long timeoffset = 0 ; //now



struct timeval tv;

struct timezone tz;

gettimeofday(&tv,&tz);

if(flag==0){

lastsecond = tv.tv_sec ;

flag = 1 ;

}

timeoffset = tv.tv_sec - lastsecond ; //get offsettime

printf(" ************************* %d:%d:%d ************************** ",(timeoffset/60)/60,(timeoffset/60)%60,timeoffset%60) ;

}

 

方法二：

 void getSystemTimer(void)

{

 time_t rawtime;

 struct tm* timeinfo;

 char timE[80];

 

 time(&rawtime);

 timeinfo=localtime(&rawtime);



 strftime(timE,80,"Date: %Y-%m-%d %I:%M:%S ",timeinfo);

 

 printf("%s",timE);

 }

 

按照格式输出：

参考百度百科：https://baike.baidu.com/item/strftime/9569073?fr=aladdin