myiso.go

package main

import (
	"log"
	"os"

	diskfs "github.com/diskfs/go-diskfs"

	"github.com/diskfs/go-diskfs/disk"
	"github.com/diskfs/go-diskfs/filesystem"
	"github.com/diskfs/go-diskfs/partition/mbr"
)

func check(err error) {
	if err != nil {
		log.Fatal(err)
	}
}

func main() {

	var diskSize int64
	diskSize = 10 * 1024 * 1024 // 10 MB

	diskImg := "/tmp/mydisk.iso"
	mydisk, _ := diskfs.Create(diskImg, diskSize, diskfs.Raw)
	table := &mbr.Table{
		LogicalSectorSize:  512,
		PhysicalSectorSize: 512,
		Partitions: []*mbr.Partition{
			{
				Bootable: false,
				Type:     mbr.Iso9660,
				Start:    2048,
				Size:     20480,
			},
		},
	}
	err := mydisk.Partition(table)
	check(err)
	fspec := disk.FilesystemSpec{1, filesystem.TypeISO9660, "label"}
	fs, err := mydisk.CreateFilesystem(fspec)
	check(err)
	//err = fs.Mkdir("/demo")
	rw, err := fs.OpenFile("demo.txt", os.O_CREATE|os.O_RDWR)
	content := []byte("demo")
	_, err = rw.Write(content)
	check(err)
}