如何设置、获取linux系统时间

最新推荐文章于 2023-01-11 16:00:00 发布

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本文介绍了一个用于设置和获取系统时间的C语言程序。通过`systime_t`结构体定义了时间格式，并提供了`set_systime`和`get_systime`两个函数来实现时间的设置与获取。该程序利用了`mktime`和`stime`等标准库函数来完成时间转换及设置。

void set_systime(systime_t *time)
{
struct tm my_tm;
time_t t1;
// char buf[128] = {0};
/**********************************************************
    sprintf(buf, "%04d-%02d-%02d %02d:%02d:%02d",time->year,
      time->month, time->day, time->hour, time->minute, time->millionsecond);
    printf("%s\n", buf);              //2012-12-12 12:12:12
***********************************************************/
my_tm.tm_year = time->year - 1900;
my_tm.tm_mon = time->month - 1;
my_tm.tm_mday = time->day;
my_tm.tm_hour = time->hour;
my_tm.tm_min = time->minute;
my_tm.tm_sec = time->millionsecond/1000;

/**********************************************************
    sprintf(buf, "%04d-%02d-%02d %02d:%02d:%02d",my_tm.tm_year + 1900,
      my_tm.tm_mon + 1, my_tm.tm_mday, my_tm.tm_hour, my_tm.tm_min, my_tm.tm_sec);
    printf("%s\n", buf);              //2012-12-12 12:12:12
*************************************************************/

t1 = mktime(&my_tm);

stime(&t1);
}
void get_systime(systime_t *mytime)
{
struct tm *my_tm;
time_t t1;

t1 = time(&t1);
my_tm = localtime(&t1);

mytime->year   = my_tm->tm_year + 1900;
mytime->month   = my_tm->tm_mon + 1;
mytime->day     = my_tm->tm_mday;
mytime->hour   = my_tm->tm_hour;
mytime->minute  = my_tm->tm_min;
mytime->millionsecond = my_tm->tm_sec * 1000;

}