add pass to linux game console

pass.go

package main

import (
	"encoding/binary"
	"fmt"
	"io"
	"os"
	"strings"
)

func main() {
	dev := os.Getenv("DEVICE_FILE_PATH")
	if dev == "" {
		dev = "/dev/input/js0"
	}

	f, err := os.Open(dev)
	if err != nil {
		panic(err)
	}
	defer f.Close()

	m := map[rune]string{
		'a': "110010",
		'b': "111011",
		'x': "112012",
		'y': "113013",
	}

	pass := os.Getenv("QUIT_PASS")
	if pass == "" {
		pass = "abbaxy"
	}

	passStr := ""
	for _, b := range pass {
		passStr = passStr + m[b]
	}

	input := ""
	for {

		//u32 time;	/* event timestamp in milliseconds */
		//u16 value;	/* value */
		//u8 type;	/* event type */
		//u8 number;	/* axis/button number */
		a := [8]byte{}
		buf := a[:]
		_, err = io.ReadFull(f, buf)
		if err != nil {
			panic(err)
		}
		//_ = binary.LittleEndian.Uint32(buf)
		value := binary.LittleEndian.Uint16(buf[4:])
		type_ := buf[6]
		number := buf[7]

		input = fmt.Sprintf("%v%v%v%v", input, value, type_, number)
		if strings.HasPrefix(passStr, input) {
			if passStr == input {
				println("pass")
				break
			}
			println("good, try more")
			continue
		}
		println("wrong pass")
		input = ""

		//println(time, value, type_, number)

	}
}