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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package conf
import (
"log"
"path/filepath"
"strings"
"golang.org/x/sys/windows"
)
func maybeMigrate(c string) {
if disableAutoMigration {
return
}
vol := filepath.VolumeName(c)
withoutVol := strings.TrimPrefix(c, vol)
oldRoot := filepath.Join(vol, "\\windows.old")
oldC := filepath.Join(oldRoot, withoutVol)
sd, err := windows.GetNamedSecurityInfo(oldRoot, windows.SE_FILE_OBJECT, windows.OWNER_SECURITY_INFORMATION)
if err == windows.ERROR_PATH_NOT_FOUND || err == windows.ERROR_FILE_NOT_FOUND {
return
}
if err != nil {
log.Printf("Not migrating configuration from ‘%s’ due to GetNamedSecurityInfo error: %v", oldRoot, err)
return
}
owner, defaulted, err := sd.Owner()
if err != nil {
log.Printf("Not migrating configuration from ‘%s’ due to GetSecurityDescriptorOwner error: %v", oldRoot, err)
return
}
if defaulted || !owner.IsWellKnown(windows.WinLocalSystemSid) {
log.Printf("Not migrating configuration from ‘%s’, as it is not explicitly owned by SYSTEM, but rather ‘%v’", oldRoot, owner)
return
}
err = windows.MoveFileEx(windows.StringToUTF16Ptr(oldC), windows.StringToUTF16Ptr(c), windows.MOVEFILE_COPY_ALLOWED)
if err != nil {
if err != windows.ERROR_FILE_NOT_FOUND && err != windows.ERROR_ALREADY_EXISTS {
log.Printf("Not migrating configuration from ‘%s’ due to error when moving files: %v", oldRoot, err)
}
return
}
log.Printf("Migrated configuration from ‘%s’", oldRoot)
}
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