Write and delete "application is running" marker file

interface/src/Application.cpp

@@ -104,6 +104,7 @@
 #include <RenderableWebEntityItem.h>
 
 #include "AudioClient.h"
+#include "CrashHandler.h"
 #include "DiscoverabilityManager.h"
 #include "GLCanvas.h"
 #include "LODManager.h"
@@ -256,6 +257,9 @@ bool setupEssentials(int& argc, char** argv) {
     // Set build version
     QCoreApplication::setApplicationVersion(BUILD_VERSION);
 
+    CrashHandler::writeRunningMarkerFiler();
+    qAddPostRoutine(CrashHandler::deleteRunningMarkerFile);
+
     DependencyManager::registerInheritance<LimitedNodeList, NodeList>();
     DependencyManager::registerInheritance<AvatarHashMap, AvatarManager>();
     DependencyManager::registerInheritance<EntityActionFactoryInterface, InterfaceActionFactory>();

interface/src/CrashHandler.cpp

@@ -0,0 +1,42 @@
+//
+//  CrashHandler.cpp
+//  interface/src
+//
+//  Created by David Rowe on 24 Aug 2015.
+//  Copyright 2015 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+#include "CrashHandler.h"
+
+#include <QCoreApplication>
+#include <QFile>
+#include <PathUtils.h>
+#include <QSettings>
+#include <QStandardPaths>
+
+static const QString RUNNING_MARKER_FILENAME = "Interface.running";
+
+void CrashHandler::writeRunningMarkerFiler() {
+    QFile runningMarkerFile(runningMarkerFilePath());
+    if (!runningMarkerFile.exists()) {
+        runningMarkerFile.open(QIODevice::WriteOnly);
+        runningMarkerFile.close();
+    }
+}
+void CrashHandler::deleteRunningMarkerFile() {
+    QFile runningMarkerFile(runningMarkerFilePath());
+    if (runningMarkerFile.exists()) {
+        runningMarkerFile.remove();
+    }
+}
+
+const QString CrashHandler::runningMarkerFilePath() {
+    QSettings::setDefaultFormat(QSettings::IniFormat);
+    QSettings applicationInfo(PathUtils::resourcesPath() + "info/ApplicationInfo.ini", QSettings::IniFormat);
+    applicationInfo.beginGroup("INFO");
+    QCoreApplication::setOrganizationName(applicationInfo.value("organizationName").toString());
+    return QStandardPaths::writableLocation(QStandardPaths::DataLocation) + "/" + RUNNING_MARKER_FILENAME;
+}

interface/src/CrashHandler.h

@@ -0,0 +1,27 @@
+//
+//  CrashHandler.h
+//  interface/src
+//
+//  Created by David Rowe on 24 Aug 2015.
+//  Copyright 2015 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+#ifndef hifi_CrashHandler_h
+#define hifi_CrashHandler_h
+
+#include <QString>
+
+class CrashHandler {
+
+public:
+    static void writeRunningMarkerFiler();
+    static void deleteRunningMarkerFile();
+
+private:
+    static const QString runningMarkerFilePath();
+};
+
+#endif // hifi_CrashHandler_h