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- // Copyright 2012 The Go Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style
- // license that can be found in the LICENSE file.
- //go:build windows
- // +build windows
- package svc
- import (
- "path/filepath"
- "strings"
- "unsafe"
- "golang.org/x/sys/windows"
- )
- func allocSid(subAuth0 uint32) (*windows.SID, error) {
- var sid *windows.SID
- err := windows.AllocateAndInitializeSid(&windows.SECURITY_NT_AUTHORITY,
- 1, subAuth0, 0, 0, 0, 0, 0, 0, 0, &sid)
- if err != nil {
- return nil, err
- }
- return sid, nil
- }
- // IsAnInteractiveSession determines if calling process is running interactively.
- // It queries the process token for membership in the Interactive group.
- // http://stackoverflow.com/questions/2668851/how-do-i-detect-that-my-application-is-running-as-service-or-in-an-interactive-s
- //
- // Deprecated: Use IsWindowsService instead.
- func IsAnInteractiveSession() (bool, error) {
- interSid, err := allocSid(windows.SECURITY_INTERACTIVE_RID)
- if err != nil {
- return false, err
- }
- defer windows.FreeSid(interSid)
- serviceSid, err := allocSid(windows.SECURITY_SERVICE_RID)
- if err != nil {
- return false, err
- }
- defer windows.FreeSid(serviceSid)
- t, err := windows.OpenCurrentProcessToken()
- if err != nil {
- return false, err
- }
- defer t.Close()
- gs, err := t.GetTokenGroups()
- if err != nil {
- return false, err
- }
- for _, g := range gs.AllGroups() {
- if windows.EqualSid(g.Sid, interSid) {
- return true, nil
- }
- if windows.EqualSid(g.Sid, serviceSid) {
- return false, nil
- }
- }
- return false, nil
- }
- // IsWindowsService reports whether the process is currently executing
- // as a Windows service.
- func IsWindowsService() (bool, error) {
- // The below technique looks a bit hairy, but it's actually
- // exactly what the .NET framework does for the similarly named function:
- // https://github.com/dotnet/extensions/blob/f4066026ca06984b07e90e61a6390ac38152ba93/src/Hosting/WindowsServices/src/WindowsServiceHelpers.cs#L26-L31
- // Specifically, it looks up whether the parent process has session ID zero
- // and is called "services".
- var pbi windows.PROCESS_BASIC_INFORMATION
- pbiLen := uint32(unsafe.Sizeof(pbi))
- err := windows.NtQueryInformationProcess(windows.CurrentProcess(), windows.ProcessBasicInformation, unsafe.Pointer(&pbi), pbiLen, &pbiLen)
- if err != nil {
- return false, err
- }
- var psid uint32
- err = windows.ProcessIdToSessionId(uint32(pbi.InheritedFromUniqueProcessId), &psid)
- if err != nil || psid != 0 {
- return false, nil
- }
- pproc, err := windows.OpenProcess(windows.PROCESS_QUERY_LIMITED_INFORMATION, false, uint32(pbi.InheritedFromUniqueProcessId))
- if err != nil {
- return false, err
- }
- defer windows.CloseHandle(pproc)
- var exeNameBuf [261]uint16
- exeNameLen := uint32(len(exeNameBuf) - 1)
- err = windows.QueryFullProcessImageName(pproc, 0, &exeNameBuf[0], &exeNameLen)
- if err != nil {
- return false, err
- }
- exeName := windows.UTF16ToString(exeNameBuf[:exeNameLen])
- if !strings.EqualFold(filepath.Base(exeName), "services.exe") {
- return false, nil
- }
- system32, err := windows.GetSystemDirectory()
- if err != nil {
- return false, err
- }
- targetExeName := filepath.Join(system32, "services.exe")
- return strings.EqualFold(exeName, targetExeName), nil
- }
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