Keep only base/extractor.[cc|h].

base/service_utils.h

-// Copyright 2007-2009 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// ========================================================================
-//
-// Service-related utilities.
-
-#ifndef OMAHA_BASE_SERVICE_UTILS_H__
-#define OMAHA_BASE_SERVICE_UTILS_H__
-
-#include <windows.h>
-#include <atlstr.h>
-#include "base/basictypes.h"
-
-namespace omaha {
-
-// Utility functions for working with the SCM database.
-class ScmDatabase {
- public:
-  // Callback function type for EnumerateServices. This gets called for each
-  // service in the registry.
-  //
-  // @param callback_context Passed unchanged from the caller of
-  // EnumerateServices to the callback function.
-  // @param service_name The name of the service (not the display name but
-  // rather the canonical name, to be used with e.g. ::OpenService()).  Note
-  // that because this function is based on enumerating the registry, it's
-  // possible that services that were recently deleted will show up in the
-  // enumeration; therefore, it should not be considered an error if you try
-  // to ::OpenService() on this name and it fails with a last error of
-  // ERROR_SERVICE_DOES_NOT_EXIST or possibly ERROR_INVALID_NAME (if
-  // somebody messed up the registry by hand).
-  //
-  // @return S_OK to continue enumeration, S_FALSE or a COM error code to
-  // stop enumeration.  The return value will be propagated to the caller
-  // of Enumerate.
-  //
-  // @note The initial version of this function used EnumServicesStatusEx
-  // but it turns out the function is a fair bit flaky, not returning all
-  // recently created (e.g. created but never started) services.
-  typedef HRESULT(*EnumerateServicesCallback)(void* callback_context,
-                                              const wchar_t* service_name);
-
-  // Calls 'callback' for each of the services in the registry.
-  //
-  // @param callback Callback function to call
-  // @param callback_context Passed unchanged to your callback function
-  //
-  // @return S_OK or a COM error code.
-  static HRESULT EnumerateServices(EnumerateServicesCallback callback,
-                                   void* callback_context);
-
-  // Returns true iff the service passed in is in the indicated state.
-  //
-  // @param service An open handle to a service.  The handle must have at
-  // least SERVICE_QUERY_CONFIG rights.
-  // @param state One of the SERVICE_XXX constants indicating the state of a
-  // service (e.g. SERVICE_DISABLED).
-  //
-  // @return True iff 'service' is in state 'state'.
-  static bool IsServiceStateEqual(SC_HANDLE service, DWORD state);
-
-  // Returns true iff the service passed in has been marked deleted.
-  //
-  // @param service An open handle to a service.  The handle must have at
-  // least SERVICE_QUERY_CONFIG and SERVICE_CHANGE_CONFIG rights.
-  //
-  // @return True iff 'service' has been marked deleted.
-  static bool IsServiceMarkedDeleted(SC_HANDLE service);
-
- private:
-  DISALLOW_EVIL_CONSTRUCTORS(ScmDatabase);
-};
-
-// Utility functions for the service's installation, overinstall etc.
-class ServiceInstall {
- public:
-
-  // Generates a versioned service name based on the current system time.
-  static CString GenerateServiceName(const TCHAR* service_prefix);
-
-  // Uninstalls all versions of the service other than the one that matches
-  // the service name passed in. Pass in NULL to uninstall everything.
-  static HRESULT UninstallServices(const TCHAR* service_prefix,
-                                   const TCHAR* exclude_service);
-
-  static bool IsServiceInstalled(const TCHAR* service_name);
-
-  // @return True if the current service can be installed without rebooting,
-  // false if a reboot is required before it can be installed.  The cases
-  // where the current service can be installed without rebooting are:
-  // a) when no service exists with the current name
-  // b) when there is an existing service with the current name but it is
-  //    not marked for deletion
-  static bool CanInstallWithoutReboot();
-
-  // Given a service name, stops it if it is already running.
-  static HRESULT StopService(const CString& service_name);
-
- protected:
-  // Context passed to the UninstallIfNotCurrent function; this is made a
-  // parameter so we can unit test the function without mucking with the
-  // "actual" services.
-  struct UninstallByPrefixParams {
-    CString prefix;  // prefix of services we want to uninstall
-    CString unless_matches;  // name of current service, to not touch
-  };
-
-  // Uninstalls a given service if it matches a given prefix but does not match
-  // a given full service name.
-  //
-  // This is an ScmDatabase::EnumerateServicesCallback function.
-  //
-  // @param context Pointer to an UninstallByPrefix structure.
-  static HRESULT UninstallByPrefix(void* context, const wchar_t* service_name);
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ServiceInstall);
-};
-
-// Service utility functions for querying current state, and eventually more.
-class ServiceUtils {
- public:
-  static bool IsServiceRunning(const TCHAR* service_name);
-  static bool IsServiceDisabled(const TCHAR* service_name);
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ServiceUtils);
-};
-
-}  // namespace omaha
-
-#endif  // OMAHA_BASE_SERVICE_UTILS_H__