gokrazy/cmd/ntp/rtc.go
2018-06-13 23:51:31 +02:00

27 lines
517 B
Go

package main
import (
"log"
"os"
"time"
"unsafe"
"golang.org/x/sys/unix"
)
func setRTC(rtc *os.File, now time.Time) error {
c := unix.RTCTime{
Sec: int32(now.Second()),
Min: int32(now.Minute()),
Hour: int32(now.Hour()),
Mday: int32(now.Day()),
Mon: int32(now.Month() - 1),
Year: int32(now.Year() - 1900),
}
if _, _, errno := unix.Syscall(unix.SYS_IOCTL, rtc.Fd(), unix.RTC_SET_TIME, uintptr(unsafe.Pointer(&c))); errno != 0 {
return errno
}
log.Printf("RTC set to %+v", c)
return nil
}