Add getting efi info from efibootmgr
This commit is contained in:
parent
914781cd00
commit
1383272d2c
6 changed files with 236 additions and 15 deletions
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@ -1,3 +1,11 @@
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module git.faercol.me/faercol/http-boot-config/config
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go 1.20
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require github.com/stretchr/testify v1.8.4
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require (
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github.com/davecgh/go-spew v1.1.1 // indirect
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github.com/pmezard/go-difflib v1.0.0 // indirect
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gopkg.in/yaml.v3 v3.0.1 // indirect
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)
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10
config/go.sum
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10
config/go.sum
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@ -0,0 +1,10 @@
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github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
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github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
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github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
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gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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@ -7,19 +7,22 @@ import (
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)
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const (
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NC = "\033[0m"
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nc = "\033[0m"
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red = "\033[0;31m"
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yellow = "\033[0;33m"
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gray = "\033[0;30m"
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)
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const (
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errorPrefix = "Error: "
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fatalPrefix = "Fatal: "
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warningprefix = "Warning: "
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debugprefix = "Debug: "
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)
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type SimpleLogger struct {
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enableColour bool
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debug bool
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}
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func (sl *SimpleLogger) printMsg(msg string, dest io.Writer) {
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@ -40,7 +43,7 @@ func (sl *SimpleLogger) colourText(msg string, colour string) string {
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if !sl.enableColour {
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return msg
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}
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return colour + msg + NC
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return colour + msg + nc
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}
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func (sl *SimpleLogger) Info(msg string) {
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@ -67,6 +70,19 @@ func (sl *SimpleLogger) Warningf(format string, a ...any) {
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sl.printMsg(sl.colourText(warningprefix+fmt.Sprintf(format, a...), yellow), os.Stdout)
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}
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func (sl *SimpleLogger) Debug(msg string) {
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if !sl.debug {
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return
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}
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sl.printMsg(sl.colourText(debugprefix+msg, gray), os.Stdout)
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}
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func (sl *SimpleLogger) Debugf(format string, a ...any) {
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if !sl.debug {
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return
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}
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sl.printMsg(sl.colourText(debugprefix+fmt.Sprintf(format, a...), gray), os.Stdout)
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}
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func (sl *SimpleLogger) Fatal(msg string) {
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sl.printMsg(sl.colourText(fatalPrefix+msg, red), os.Stderr)
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os.Exit(1)
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@ -77,10 +93,9 @@ func (sl *SimpleLogger) Fatalf(format string, a ...any) {
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os.Exit(1)
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}
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func WithColour() *SimpleLogger {
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return &SimpleLogger{enableColour: true}
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}
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func NoColour() *SimpleLogger {
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return &SimpleLogger{enableColour: false}
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func New(colour, debug bool) *SimpleLogger {
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return &SimpleLogger{
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debug: debug,
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enableColour: colour,
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}
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}
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@ -1,14 +1,54 @@
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package main
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import "git.faercol.me/faercol/http-boot-config/config/logger"
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import (
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"errors"
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"flag"
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"io/fs"
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"git.faercol.me/faercol/http-boot-config/config/logger"
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"git.faercol.me/faercol/http-boot-config/config/prober"
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)
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type cliArgs struct {
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debug bool
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colour bool
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}
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func parseArgs() cliArgs {
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debugFlag := flag.Bool("debug", false, "Display debug logs")
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noColourFlag := flag.Bool("no-colour", false, "Disable colour logs")
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flag.Parse()
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return cliArgs{
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debug: *debugFlag,
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colour: !*noColourFlag,
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}
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}
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func displayAppList(apps []prober.EfiApp, l *logger.SimpleLogger) {
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l.Info("Found the following EFI applications:")
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for _, a := range apps {
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prefix := " "
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if a.Active {
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prefix = "*"
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}
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l.Infof("\t- %s[%d] %s: %s", prefix, a.ID, a.Name, a.Path)
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}
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}
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func main() {
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l := logger.NoColour()
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args := parseArgs()
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l := logger.New(args.colour, args.debug)
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l.Info("test message")
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l.Warning("this is a warning")
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l.Error("this is an error")
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l.Info("Checking EFI directory for available boot images...")
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images, err := prober.GetEFIApps(l)
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if err != nil {
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if errors.Is(err, fs.ErrPermission) {
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l.Fatal("Permission error, try to run the command as sudo")
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}
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l.Fatalf("Failed to check EFI directory: %s", err.Error())
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}
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l.Fatal("this is fatal")
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l.Info("This should not be displayed")
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displayAppList(images, l)
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}
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102
config/prober/prober.go
Normal file
102
config/prober/prober.go
Normal file
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@ -0,0 +1,102 @@
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package prober
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import (
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"bytes"
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"errors"
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"fmt"
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"os/exec"
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"regexp"
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"strconv"
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"strings"
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"git.faercol.me/faercol/http-boot-config/config/logger"
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)
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var efiBootmgrRegexp = regexp.MustCompile(`Boot(?P<id>\d+)\* (?P<name>[\w ]+)\t(\w+\(.*\))/File\((?P<filepath>.+)\)`)
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var activeRegexp = regexp.MustCompile(`BootCurrent: (\d+)`)
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type EfiApp struct {
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ID int
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Name string
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Path string
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Active bool
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}
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func efiAppFromBootMgrOutput(rawVal string, activeId int) (app EfiApp, ok bool) {
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match := efiBootmgrRegexp.FindStringSubmatch(rawVal)
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if len(match) == 0 {
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return
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}
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result := make(map[string]string)
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for i, name := range efiBootmgrRegexp.SubexpNames() {
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if i != 0 && name != "" {
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result[name] = match[i]
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}
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}
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id, ok := result["id"]
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if !ok {
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return
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}
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idInt, err := strconv.Atoi(id)
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if err != nil {
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return app, false
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}
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name, ok := result["name"]
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if !ok {
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return
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}
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filepath, ok := result["filepath"]
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if !ok {
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return
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}
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return EfiApp{
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ID: idInt,
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Name: strings.TrimSpace(name),
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Path: strings.TrimSpace(filepath),
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Active: idInt == activeId,
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}, true
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}
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func getActiveEFIApp(output string) (int, error) {
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match := activeRegexp.FindStringSubmatch(output)
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if len(match) == 0 {
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return -1, errors.New("no active boot image found")
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}
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strId := match[1]
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id, err := strconv.Atoi(strId)
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if err != nil {
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return -1, err
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}
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return id, nil
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}
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func GetEFIApps(log *logger.SimpleLogger) (apps []EfiApp, err error) {
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cmd := exec.Command("/usr/bin/efibootmgr")
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var out bytes.Buffer
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cmd.Stdout = &out
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err = cmd.Run()
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if err != nil {
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return
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}
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if cmd.ProcessState.ExitCode() != 0 {
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return nil, fmt.Errorf("error running efibootmgr, returncode %d", cmd.ProcessState.ExitCode())
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}
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outStr := out.String()
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activeBootID, err := getActiveEFIApp(outStr)
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if err != nil {
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return
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}
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for _, l := range strings.Split(outStr, "\n") {
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log.Debugf("Parsing line %q", l)
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app, ok := efiAppFromBootMgrOutput(l, activeBootID)
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if !ok {
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log.Debug("Line is not a valid EFI application")
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continue
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}
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apps = append(apps, app)
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}
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return
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}
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46
config/prober/prober_test.go
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46
config/prober/prober_test.go
Normal file
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@ -0,0 +1,46 @@
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package prober
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestEfiFomBootMgr(t *testing.T) {
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t.Run("OK - Windows", func(t *testing.T) {
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rawVal := (`Boot0000* Windows Boot Manager HD(1,GPT,4ad714ba-6a01-4f76-90e3-1bb93a59b67e,0x800,0x32000)/File(\EFI\MICROSOFT\BOOT\BOOTMGFW.EFI)` +
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`57494e444f5753000100000088000000780000004200430044004f0042004a004500430054003d007b00390064006500610038003600320063002d0035006300640064002d00`)
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expected := EfiApp{ID: 0, Name: "Windows Boot Manager", Path: `\EFI\MICROSOFT\BOOT\BOOTMGFW.EFI`, Active: true}
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app, ok := efiAppFromBootMgrOutput(rawVal, 0)
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assert.True(t, ok)
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assert.Equal(t, expected, app)
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})
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t.Run("OK - Manjaro", func(t *testing.T) {
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rawVal := `Boot0001* Manjaro HD(1,GPT,16f06d01-50da-6544-86bd-f3457f980086,0x1000,0x96000)/File(\EFI\MANJARO\GRUBX64.EFI)`
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expected := EfiApp{ID: 1, Name: "Manjaro", Path: `\EFI\MANJARO\GRUBX64.EFI`, Active: false}
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app, ok := efiAppFromBootMgrOutput(rawVal, 0)
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assert.True(t, ok)
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assert.Equal(t, expected, app)
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})
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t.Run("OK - EFI Base", func(t *testing.T) {
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rawVal := `Boot0002* UEFI OS HD(1,GPT,16f06d01-50da-6544-86bd-f3457f980086,0x1000,0x96000)/File(\EFI\BOOT\BOOTX64.EFI)0000424f`
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expected := EfiApp{ID: 2, Name: "UEFI OS", Path: `\EFI\BOOT\BOOTX64.EFI`, Active: false}
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app, ok := efiAppFromBootMgrOutput(rawVal, 0)
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assert.True(t, ok)
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assert.Equal(t, expected, app)
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})
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t.Run("NOK - CD", func(t *testing.T) {
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rawVal := `Boot0003* UEFI:CD/DVD Drive BBS(129,,0x0)`
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_, ok := efiAppFromBootMgrOutput(rawVal, 0)
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assert.False(t, ok)
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})
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t.Run("NOK - Other line", func(t *testing.T) {
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rawVal := `BootOrder: 0001,0002,0000,0003,0004,0005`
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_, ok := efiAppFromBootMgrOutput(rawVal, 0)
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assert.False(t, ok)
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})
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}
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