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step_type_boot_command.go
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step_type_boot_command.go
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package virtualbox
import (
"fmt"
"github.com/mitchellh/multistep"
"github.com/mitchellh/packer/packer"
"log"
"strings"
"time"
"unicode"
"unicode/utf8"
)
const KeyLeftShift uint32 = 0xFFE1
type bootCommandTemplateData struct {
HTTPIP string
HTTPPort uint
Name string
}
// This step "types" the boot command into the VM over VNC.
//
// Uses:
// config *config
// driver Driver
// http_port int
// ui packer.Ui
// vmName string
//
// Produces:
// <nothing>
type stepTypeBootCommand struct{}
func (s *stepTypeBootCommand) Run(state multistep.StateBag) multistep.StepAction {
config := state.Get("config").(*config)
driver := state.Get("driver").(Driver)
httpPort := state.Get("http_port").(uint)
ui := state.Get("ui").(packer.Ui)
vmName := state.Get("vmName").(string)
tplData := &bootCommandTemplateData{
"10.0.2.2",
httpPort,
config.VMName,
}
ui.Say("Typing the boot command...")
for _, command := range config.BootCommand {
command, err := config.tpl.Process(command, tplData)
if err != nil {
err := fmt.Errorf("Error preparing boot command: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
for _, code := range scancodes(command) {
if code == "wait" {
time.Sleep(1 * time.Second)
continue
}
if code == "wait5" {
time.Sleep(5 * time.Second)
continue
}
if code == "wait10" {
time.Sleep(10 * time.Second)
continue
}
// Since typing is sometimes so slow, we check for an interrupt
// in between each character.
if _, ok := state.GetOk(multistep.StateCancelled); ok {
return multistep.ActionHalt
}
if err := driver.VBoxManage("controlvm", vmName, "keyboardputscancode", code); err != nil {
err := fmt.Errorf("Error sending boot command: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
}
}
return multistep.ActionContinue
}
func (*stepTypeBootCommand) Cleanup(multistep.StateBag) {}
func scancodes(message string) []string {
// Scancodes reference: http://www.win.tue.nl/~aeb/linux/kbd/scancodes-1.html
//
// Scancodes represent raw keyboard output and are fed to the VM by the
// VBoxManage controlvm keyboardputscancode program.
//
// Scancodes are recorded here in pairs. The first entry represents
// the key press and the second entry represents the key release and is
// derived from the first by the addition of 0x80.
special := make(map[string][]string)
special["<bs>"] = []string{"0e", "8e"}
special["<del>"] = []string{"53", "d3"}
special["<enter>"] = []string{"1c", "9c"}
special["<esc>"] = []string{"01", "81"}
special["<f1>"] = []string{"3b", "bb"}
special["<f2>"] = []string{"3c", "bc"}
special["<f3>"] = []string{"3d", "bd"}
special["<f4>"] = []string{"3e", "be"}
special["<f5>"] = []string{"3f", "bf"}
special["<f6>"] = []string{"40", "c0"}
special["<f7>"] = []string{"41", "c1"}
special["<f8>"] = []string{"42", "c2"}
special["<f9>"] = []string{"43", "c3"}
special["<f10>"] = []string{"44", "c4"}
special["<return>"] = []string{"1c", "9c"}
special["<tab>"] = []string{"0f", "8f"}
shiftedChars := "~!@#$%^&*()_+{}|:\"<>?"
scancodeIndex := make(map[string]uint)
scancodeIndex["1234567890-="] = 0x02
scancodeIndex["!@#$%^&*()_+"] = 0x02
scancodeIndex["qwertyuiop[]"] = 0x10
scancodeIndex["QWERTYUIOP{}"] = 0x10
scancodeIndex["asdfghjkl;'`"] = 0x1e
scancodeIndex[`ASDFGHJKL:"~`] = 0x1e
scancodeIndex[`\zxcvbnm,./`] = 0x2b
scancodeIndex["|ZXCVBNM<>?"] = 0x2b
scancodeIndex[" "] = 0x39
scancodeMap := make(map[rune]uint)
for chars, start := range scancodeIndex {
var i uint = 0
for len(chars) > 0 {
r, size := utf8.DecodeRuneInString(chars)
chars = chars[size:]
scancodeMap[r] = start + i
i += 1
}
}
result := make([]string, 0, len(message)*2)
for len(message) > 0 {
var scancode []string
if strings.HasPrefix(message, "<wait>") {
log.Printf("Special code <wait> found, will sleep 1 second at this point.")
scancode = []string{"wait"}
message = message[len("<wait>"):]
}
if strings.HasPrefix(message, "<wait5>") {
log.Printf("Special code <wait5> found, will sleep 5 seconds at this point.")
scancode = []string{"wait5"}
message = message[len("<wait5>"):]
}
if strings.HasPrefix(message, "<wait10>") {
log.Printf("Special code <wait10> found, will sleep 10 seconds at this point.")
scancode = []string{"wait10"}
message = message[len("<wait10>"):]
}
if scancode == nil {
for specialCode, specialValue := range special {
if strings.HasPrefix(message, specialCode) {
log.Printf("Special code '%s' found, replacing with: %s", specialCode, specialValue)
scancode = specialValue
message = message[len(specialCode):]
break
}
}
}
if scancode == nil {
r, size := utf8.DecodeRuneInString(message)
message = message[size:]
scancodeInt := scancodeMap[r]
keyShift := unicode.IsUpper(r) || strings.ContainsRune(shiftedChars, r)
scancode = make([]string, 0, 4)
if keyShift {
scancode = append(scancode, "2a")
}
scancode = append(scancode, fmt.Sprintf("%02x", scancodeInt))
if keyShift {
scancode = append(scancode, "aa")
}
scancode = append(scancode, fmt.Sprintf("%02x", scancodeInt+0x80))
log.Printf("Sending char '%c', code '%v', shift %v", r, scancode, keyShift)
}
result = append(result, scancode...)
}
return result
}