//go:build linux

package hostexec

import (
	"golang.org/x/sys/unix"
	"os"
	"strings"
	"time"
)

type SystemClock struct{}

func (SystemClock) Now() (time.Time, int64, error) {
	var ts unix.Timespec
	if err := unix.ClockGettime(unix.CLOCK_BOOTTIME, &ts); err != nil {
		return time.Time{}, 0, err
	}
	return time.Now(), ts.Nano(), nil
}
func (SystemClock) After(d time.Duration) <-chan time.Time { return time.After(d) }
func BootID() (string, error) {
	b, err := os.ReadFile("/proc/sys/kernel/random/boot_id")
	if err != nil {
		return "", err
	}
	id := strings.TrimSpace(string(b))
	if !validID(id) {
		return "", ErrState
	}
	return id, nil
}