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