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Use rtc_time

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This commit is contained in:
sin 2014-06-03 15:04:53 +01:00
parent dacfb76c75
commit e3d7ffa05c
2 changed files with 45 additions and 5 deletions
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28
hwclock.c
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@ -77,14 +77,36 @@ echotime(char *dev)
static void
readrtctm(struct tm *tm, int fd)
{
memset(tm, 0, sizeof(*tm));
ioctl(fd, RTC_RD_TIME, tm);
struct rtc_time rt;
memset(&rt, 0, sizeof(rt));
ioctl(fd, RTC_RD_TIME, &rt);
tm->tm_sec = rt.tm_sec;
tm->tm_min = rt.tm_min;
tm->tm_hour = rt.tm_hour;
tm->tm_mday = rt.tm_mday;
tm->tm_mon = rt.tm_mon;
tm->tm_year = rt.tm_year;
tm->tm_wday = rt.tm_wday;
tm->tm_yday = rt.tm_yday;
tm->tm_isdst = rt.tm_isdst;
}
static void
writertctm(struct tm *tm, int fd)
{
ioctl(fd, RTC_SET_TIME, tm);
struct rtc_time rt;
rt.tm_sec = tm->tm_sec;
rt.tm_min = tm->tm_min;
rt.tm_hour = tm->tm_hour;
rt.tm_mday = tm->tm_mday;
rt.tm_mon = tm->tm_mon;
rt.tm_year = tm->tm_year;
rt.tm_wday = tm->tm_wday;
rt.tm_yday = tm->tm_yday;
rt.tm_isdst = tm->tm_isdst;
ioctl(fd, RTC_SET_TIME, &rt);
}
static void

22
rtc.h
View File

@ -1,2 +1,20 @@
#define RTC_RD_TIME _IOR('p', 0x09, struct tm) /* Read RTC time */
#define RTC_SET_TIME _IOW('p', 0x0a, struct tm) /* Set RTC time */
/*
* The struct used to pass data via the following ioctl. Similar to the
* struct tm in <time.h>, but it needs to be here so that the kernel
* source is self contained, allowing cross-compiles, etc. etc.
*/
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;
};
#define RTC_RD_TIME _IOR('p', 0x09, struct rtc_time) /* Read RTC time */
#define RTC_SET_TIME _IOW('p', 0x0a, struct rtc_time) /* Set RTC time */