package keypressdetector

// #cgo CFLAGS: -g -Wall
// #include "evdev.h"
// #include <stdlib.h>
import "C"

import (
	"unsafe"
	"syscall"
)


// Evdev can detect keypresses on /dev/input devices
type Evdev struct {}

// BlockUntilKeypress waits until a key is pressed on the specified device
func (Evdev) BlockUntilKeypress(devicePath string) error {
	path := C.CString(devicePath)
	defer C.free(unsafe.Pointer(path))

	ret := C.block_until_keypress(path)
	if ret < 0 {
		return syscall.Errno(ret)
	}

	return nil
}