id3 tags...not very pretty right now...

gistfile1.txt

package main

import(
  "os"
	"fmt"
	"log"
	"bufio"
)

func main() {

	if len(os.Args) < 1 {
		fmt.Println("Please give me a file name")
		os.Exit(1)
	}

	inFile, err := os.Open(string(os.Args[1]))
	if err != nil {
		log.Fatal(err)
	}

	if _, err = inFile.Seek(-128, 2); err != nil {
		log.Fatal(err)
	}

	reader := bufio.NewReader(inFile)

	header := make([]byte, 3)

	_, err = reader.Read(header)
	if err != nil {
		log.Fatal(err)
	}

	if string(header) != "TAG" {
		fmt.Println("This file does not have id3 tags")
		os.Exit(1)
	}

	tag := make([]byte, 125)
	_, err = reader.Read(tag)
	if err != nil {
		log.Fatal(err)
	}

	name    := string(tag[0:29])
	album   := string(tag[30:60])
	comment := string(tag[61:91])
	year    := string(tag[92:96])
	fmt.Println(name)
	fmt.Println(album)
	fmt.Println(comment)
	fmt.Println(year)
}