Get the clock of the RTC device in linux

Because of the differences between linux and windows, this struct cannot use the tm struct in the library file.

Code

# Include <sys/ioctl. 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;
};
# Define RTC_MAGIC 'P'
# Define RTC_RD_TIME _ IOR (RTC_MAGIC, 0x09, struct rtc_time)/* Read RTC time .*/
# Define RTC_SET_TIME _ IOW (RTC_MAGIC, 0x0a, struct rtc_time)/* Set RTC time .*/
Void rtc_test (void)
{
Int fd;
Struct rtc_time tm;
Fd = open ("/dev/rtc0", O_RDONLY );
If (fd <0 ){
Return;
}
If (0! = Ioctl (fd, RTC_RD_TIME, & tm )){
Close (fd );
Return;
}
Close (fd );

Printf ("% d-% d: % d \ n ",
Tm. tm_year + 1900,
Tm. tm_mon + 1,
Tm. tm_mday,
Tm. tm_hour,
Tm. tm_min,
Tm. tm_sec );
}