// Copyright (c) 2010 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "base/file_util.h" #include "base/logging.h" #include "base/path_service.h" #include "base/utf_string_conversions.h" #include "chrome/common/chrome_constants.h" #include "chrome/common/chrome_paths.h" #include "chrome/common/service_process_util.h" #if defined(OS_WIN) #include "base/scoped_handle_win.h" #endif // TODO(hclam): Split this file for different platforms. // TODO(hclam): |type| is not used at all. Different types of service process // should have a different instance of process and channel. std::string GetServiceProcessChannelName(ServiceProcessType type) { FilePath user_data_dir; PathService::Get(chrome::DIR_USER_DATA, &user_data_dir); // TODO(sanjeevr): We need to actually figure out the right way to determine // a channel name. The below is to facilitate testing only. #if defined(OS_WIN) std::string channel_name = WideToUTF8(user_data_dir.value()); #elif defined(OS_POSIX) std::string channel_name = user_data_dir.value(); #endif // defined(OS_WIN) std::replace(channel_name.begin(), channel_name.end(), '\\', '!'); channel_name.append("_service_ipc"); return channel_name; } // Gets the name of the lock file for service process. static FilePath GetServiceProcessLockFilePath(ServiceProcessType type) { FilePath user_data_dir; PathService::Get(chrome::DIR_USER_DATA, &user_data_dir); return user_data_dir.Append(FILE_PATH_LITERAL("Service Process Lock")); } #if defined(OS_WIN) static std::wstring GetServiceProcessEventName( ServiceProcessType type) { FilePath path = GetServiceProcessLockFilePath(type); std::wstring event_name = path.value(); std::replace(event_name.begin(), event_name.end(), '\\', '!'); return event_name; } // An event that is signaled when a service process is running. This // variable is used only in the service process. static ScopedHandle service_process_running_event; #endif void SignalServiceProcessRunning(ServiceProcessType type) { #if defined(OS_WIN) std::wstring event_name = GetServiceProcessEventName(type); service_process_running_event.Set( CreateEvent(NULL, true, true, event_name.c_str())); DCHECK(service_process_running_event.IsValid()); #else // TODO(hclam): Implement better mechanism for these platform. const FilePath path = GetServiceProcessLockFilePath(type); FILE* file = file_util::OpenFile(path, "wb+"); if (!file) return; LOG(INFO) << "Created Service Process lock file: " << path.value(); file_util::TruncateFile(file) && file_util::CloseFile(file); #endif } void SignalServiceProcessStopped(ServiceProcessType type) { #if defined(OS_WIN) // Close the handle to the event. service_process_running_event.Close(); #else // TODO(hclam): Implement better mechanism for these platform. const FilePath path = GetServiceProcessLockFilePath(type); file_util::Delete(path, false); #endif } bool CheckServiceProcessRunning(ServiceProcessType type) { #if defined(OS_WIN) std::wstring event_name = GetServiceProcessEventName(type); ScopedHandle event( OpenEvent(SYNCHRONIZE | READ_CONTROL, false, event_name.c_str())); if (!event.IsValid()) return false; // Check if the event is signaled. return WaitForSingleObject(event, 0) == WAIT_OBJECT_0; #else // TODO(hclam): Implement better mechanism for these platform. const FilePath path = GetServiceProcessLockFilePath(type); return file_util::PathExists(path); #endif }