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app_windows.go
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app_windows.go
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package autostart
// #cgo LDFLAGS: -lole32 -luuid
/*
#define WIN32_LEAN_AND_MEAN
#include <stdint.h>
#include <windows.h>
uint64_t CreateShortcut(char *shortcutA, char *path, char *args);
*/
import "C"
import (
"errors"
"fmt"
"os"
"path/filepath"
"strings"
"syscall"
"github.com/spiretechnology/go-autostart/v2/internal/errutil"
"golang.org/x/sys/windows/svc/mgr"
)
func (a *autostart) IsEnabled() (bool, error) {
switch a.options.Mode {
case ModeUser:
return a.isEnabledUser()
case ModeSystem:
return a.isEnabledAdmin()
default:
return false, errutil.Wrap(ErrInvalidMode)
}
}
func (a *autostart) Enable() error {
switch a.options.Mode {
case ModeUser:
return a.enableUser()
case ModeSystem:
return a.enableAdmin()
default:
return ErrInvalidMode
}
}
func (a *autostart) Disable() error {
switch a.options.Mode {
case ModeUser:
return a.disableUser()
case ModeSystem:
return a.disableAdmin()
default:
return errutil.Wrap(ErrInvalidMode)
}
}
func (a *autostart) getUserStartupDir() string {
return filepath.Join(
os.Getenv("USERPROFILE"),
"AppData",
"Roaming",
"Microsoft",
"Windows",
"Start Menu",
"Programs",
"Startup",
)
}
func (a *autostart) getUserStartupLinkPath() string {
return filepath.Join(
a.getUserStartupDir(),
fmt.Sprintf("%s.lnk", a.options.Name),
)
}
// isEnabledUser checks if the app is enabled for startup at the user level.
func (a *autostart) isEnabledUser() (bool, error) {
_, err := os.Stat(a.getUserStartupLinkPath())
if err == nil {
return true, nil
}
if os.IsNotExist(err) {
return false, nil
}
return false, errutil.Wrapf(err, "checking if plist file exists")
}
func (a *autostart) enableUser() error {
// Get the path to the binary file. Also follow symbolic links to make sure we are always
// using the absolute binary path and not the .lnk file
binaryPath, err := os.Executable()
if err != nil {
return errutil.Wrapf(err, "getting executable path")
}
binaryPath, err = filepath.EvalSymlinks(binaryPath)
if err != nil {
return errutil.Wrapf(err, "evaluating symbolic links")
}
// Make the directory
startupDir := a.getUserStartupDir()
if err := os.MkdirAll(startupDir, 0777); err != nil {
return errutil.Wrapf(err, "creating startup directory")
}
// If the binary path is ALREADY the symlink path, we don't need to do anything
startupLnkPath := a.getUserStartupLinkPath()
if binaryPath == startupLnkPath {
return errutil.Wrapf(nil, "binary path is already the symlink path")
}
// Escape and join all the command line arguments
args := joinArgs(a.options.Arguments)
// Create the shortcut using the Windows API
if res := C.CreateShortcut(C.CString(startupLnkPath), C.CString(binaryPath), C.CString(args)); res != 0 {
return errors.New(fmt.Sprintf("autostart: cannot create shortcut '%s' error code: 0x%.8x", startupLnkPath, res))
}
return nil
}
func (a *autostart) disableUser() error {
// Get the path to the lnk file
startupLnkPath := a.getUserStartupLinkPath()
// If the link file still exists
if _, err := os.Stat(startupLnkPath); err == nil {
return os.Remove(startupLnkPath)
}
// Otherwise just do nothing
return nil
}
// isEnabledUser checks if the app is enabled for startup at the administrator level.
func (a *autostart) isEnabledAdmin() (bool, error) {
// Connect to the Windows service manager
m, err := mgr.Connect()
if err != nil {
return false, errutil.Wrapf(err, "connecting to service manager")
}
defer m.Disconnect()
// Attempt to get the service
s, err := m.OpenService(a.options.Label)
if err != nil {
// The service is not registered
return false, nil
}
defer s.Close()
// The service is registered
return true, nil
}
func (a *autostart) enableAdmin() error {
m, err := mgr.Connect()
if err != nil {
return errutil.Wrapf(err, "connecting to service manager")
}
defer m.Disconnect()
// Configure the service
config := mgr.Config{
StartType: mgr.StartAutomatic,
DisplayName: a.options.Name,
Description: a.options.Description,
}
// Get the path to the binary file
binaryPath, err := os.Executable()
if err != nil {
return errutil.Wrapf(err, "getting executable path")
}
// Create the service
s, err := m.CreateService(a.options.Label, binaryPath, config, a.options.Arguments...)
if err != nil {
return errutil.Wrapf(err, "creating service")
}
defer s.Close()
// Start the service after system reboots
err = s.SetRecoveryActions([]mgr.RecoveryAction{
{Type: mgr.ServiceRestart, Delay: 60000},
}, uint32(0))
if err != nil {
return errutil.Wrapf(err, "setting recovery actions")
}
return nil
}
func (a *autostart) disableAdmin() error {
// Connect to the Windows service manager
m, err := mgr.Connect()
if err != nil {
return errutil.Wrapf(err, "connecting to service manager")
}
defer m.Disconnect()
// Attempt to get the service
s, err := m.OpenService(a.options.Label)
if err != nil {
// The service is not registered
return nil
}
defer s.Close()
// Delete the service
return errutil.Wrapf(s.Delete(), "deleting service")
}
func joinArgs(arguments []string) string {
var escapedArgs []string
for _, arg := range arguments {
escapedArgs = append(escapedArgs, syscall.EscapeArg(arg))
}
return strings.Join(escapedArgs, " ")
}