mirror of https://github.com/byReqz/go-etcher.git
303 lines
7.7 KiB
Go
303 lines
7.7 KiB
Go
package main
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import (
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"crypto/sha256"
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"fmt"
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ac "github.com/JoaoDanielRufino/go-input-autocomplete"
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"github.com/briandowns/spinner"
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"github.com/fatih/color"
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"github.com/schollz/progressbar/v3"
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flag "github.com/spf13/pflag"
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"io"
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"log"
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"os"
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"runtime"
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"strconv"
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"strings"
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"time"
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)
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var device string
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var input string
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var force bool
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var disable_hash bool
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func init() {
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flag.StringVarP(&device, "device", "d", "", "target device")
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flag.StringVarP(&input, "input", "i", "", "input file")
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flag.BoolVarP(&force, "force", "f", false, "override safety features")
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flag.BoolVarP(&disable_hash, "no-hash", "n", false, "disable hash verification")
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flag.Parse()
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}
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func GetPath() string {
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path, err := ac.Read("[ " + color.YellowString("i") + " ] Please input your image file: ")
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if err != nil {
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log.Fatal(err)
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}
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path = strings.TrimSpace(path)
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if strings.HasPrefix(path, "~/") {
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homedir, err := os.UserHomeDir()
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if err != nil {
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log.Fatal(err)
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}
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return homedir + path[1:]
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}
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if path == "" {
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fmt.Println("[", color.RedString("!"), "] No image given, retrying.")
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path = GetPath()
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}
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return path
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}
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func GetDest() string {
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PrintAvail()
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dest, err := ac.Read("[ " + color.YellowString("i") + " ] Please input destination: ")
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if err != nil {
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log.Fatal(err)
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}
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dest = strings.TrimSpace(dest)
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if strings.HasPrefix(dest, "~/") {
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homedir, err := os.UserHomeDir()
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if err != nil {
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log.Fatal(err)
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}
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return homedir + dest[1:]
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}
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if dest == "" {
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fmt.Println("[", color.RedString("!"), "] No destination given, retrying.")
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dest = GetDest()
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}
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return dest
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}
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func WriteImage(image *os.File, target *os.File, size int64) (int64, error) {
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bar := progressbar.NewOptions(int(size),
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progressbar.OptionSetWriter(os.Stderr),
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progressbar.OptionShowBytes(true),
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progressbar.OptionSetWidth(25),
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progressbar.OptionSetDescription("Writing image file..."),
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progressbar.OptionSetTheme(progressbar.Theme{
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Saucer: "=",
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SaucerHead: ">",
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SaucerPadding: " ",
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BarStart: "[",
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BarEnd: "]",
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}))
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writer := io.MultiWriter(target, bar)
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written, err := io.Copy(writer, image)
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if err != nil {
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return 0, err
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}
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return written, err
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}
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func PrintAvail() {
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if runtime.GOOS == "linux" {
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block, _ := os.ReadDir("/sys/block")
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if len(block) == 0 {
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return
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}
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var targets []string
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for _, device := range block {
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if strings.HasPrefix(device.Name(), "sd") {
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targets = append(targets, device.Name())
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}
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if strings.HasPrefix(device.Name(), "nvme") {
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targets = append(targets, device.Name())
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}
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if strings.HasPrefix(device.Name(), "vd") {
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targets = append(targets, device.Name())
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}
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}
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fmt.Println("Available devices:")
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for _, target := range targets {
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sizefile, _ := os.Open("/sys/block/" + target + "/size")
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sizeread, _ := io.ReadAll(sizefile)
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_ = sizefile.Close()
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sizestring := strings.ReplaceAll(string(sizeread), "\n", "")
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size, _ := strconv.Atoi(sizestring)
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size = size * 512
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size = size / 1024 / 1024 / 1024
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fmt.Print(" * ", "/dev/"+target)
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if size > 0 {
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fmt.Print(" [", size, "GB]\n")
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} else {
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fmt.Println("")
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}
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}
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}
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}
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func main() {
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s := spinner.New(spinner.CharSets[14], 100*time.Millisecond)
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if input == "" {
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if len(flag.Args()) == 0 {
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input = GetPath()
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} else if len(flag.Args()) > 0 {
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input = flag.Args()[0]
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}
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}
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if device == "" {
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if len(flag.Args()) == 0 {
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device = GetDest()
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} else if len(flag.Args()) > 0 {
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if input == flag.Args()[0] && len(flag.Args()) > 1 {
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device = flag.Args()[1]
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} else if input != flag.Args()[0] && len(flag.Args()) > 0 {
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device = flag.Args()[0]
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}
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}
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}
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s.Prefix = "[ "
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s.Suffix = " ] Getting file details"
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s.Start()
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statinput, err := os.Stat(input)
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
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log.Fatal(err)
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}
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statdevice, err := os.Stat(device)
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
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log.Fatal(err)
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}
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image, err := os.Open(input)
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
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log.Fatal(err)
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}
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var inputsize int64
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var inputisblock bool
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if statinput.Size() != 0 {
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inputsize = statinput.Size()
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inputisblock = false
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} else {
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inputsize, _ = image.Seek(0, io.SeekEnd)
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inputisblock = true
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_, _ = image.Seek(0, 0)
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}
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target, err := os.OpenFile(device, os.O_RDWR, 0660)
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
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log.Fatal(err)
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}
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var targetsize int64
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var targetisblock bool
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if statdevice.Size() != 0 {
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targetsize = statdevice.Size()
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targetisblock = false
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} else {
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targetsize, err = target.Seek(0, io.SeekEnd)
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targetisblock = true
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_, _ = target.Seek(0, 0)
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}
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prehash := sha256.New()
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if !(force || disable_hash) {
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
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log.Fatal(err)
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}
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_, err = io.Copy(prehash, image)
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_, _ = image.Seek(0, 0)
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}
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Getting file details ")
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log.Fatal(err)
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} else {
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s.Stop()
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fmt.Println("\r[", color.GreenString("✓"), "] Getting file details ")
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}
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inputmb := fmt.Sprint("[", inputsize/1024/1024, "MB]")
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devicemb := fmt.Sprint("[", targetsize/1024/1024, "MB]")
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var inputblock string
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var targetblock string
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if inputisblock {
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inputblock = "[Blockdevice]"
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} else {
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inputblock = "[File]"
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}
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if targetisblock {
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targetblock = "[Blockdevice]"
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} else {
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targetblock = "[File]"
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}
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fmt.Println("[", color.BlueString("i"), "] Input device/file: "+input, inputmb, inputblock)
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fmt.Println("[", color.BlueString("i"), "] Output device/file: "+device, devicemb, targetblock)
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if !force {
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if inputsize > targetsize {
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fmt.Println("[", color.RedString("w"), "]", color.RedString(" Warning:"), "Input file seems to be bigger than the destination!")
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}
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fmt.Print(color.HiWhiteString("Do you want to continue? [y/N]: "))
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var yesno string
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_, _ = fmt.Scanln(&yesno)
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yesno = strings.TrimSpace(yesno)
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if !(yesno == "y" || yesno == "Y") {
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log.Fatal("aborted")
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}
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}
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written, err := WriteImage(image, target, inputsize)
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_, _ = target.Seek(0, 0)
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if err != nil {
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fmt.Println("\r[", color.RedString("✘"), "] Writing image,", written, "bytes written ")
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log.Fatal(err)
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} else {
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fmt.Println("\r[", color.GreenString("✓"), "] Writing image,", written, "bytes written ")
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}
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s.Prefix = "[ "
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s.Suffix = " ] Syncing"
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s.Start()
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err = image.Sync()
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Syncing ")
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log.Fatal(err)
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}
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err = target.Sync()
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if err != nil {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Syncing ")
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log.Fatal(err)
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} else {
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s.Stop()
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fmt.Println("\r[", color.GreenString("✓"), "] Syncing ")
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}
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if !(force || disable_hash) {
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s.Prefix = "[ "
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s.Suffix = " ] Verifying"
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s.Start()
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posthash := sha256.New()
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_, err = io.CopyN(posthash, target, inputsize)
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presum := fmt.Sprintf("%x", prehash.Sum(nil))
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postsum := fmt.Sprintf("%x", posthash.Sum(nil))
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if err != nil || presum != postsum {
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s.Stop()
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fmt.Println("\r[", color.RedString("✘"), "] Verifying ")
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log.Fatal(err)
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} else {
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s.Stop()
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fmt.Println("\r[", color.GreenString("✓"), "] Verifying ")
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}
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}
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err = image.Close()
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if err != nil {
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log.Fatal(err)
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}
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err = target.Close()
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if err != nil {
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log.Fatal(err)
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}
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}
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