12 files changed, 211 insertions, 89 deletions
diff --git a/third_party/SingleApplication-3.0.19/.gitignore b/third_party/SingleApplication-3.1.3.1/.gitignore
index ad390758..35533fe8 100644
--- a/third_party/SingleApplication-3.0.19/.gitignore
+++ b/third_party/SingleApplication-3.1.3.1/.gitignore
@@ -6,4 +6,11 @@
 /examples/basic/basic
 /examples/calculator/calculator
 /examples/sending_arguments/sending_arguments
-CMakeLists.txt.user
+/**/CMakeLists.txt.user
+/**/CMakeCache.txt
+/**/CMakeCache/*
+/**/CMakeFiles/*
+/**/Makefile
+/**/cmake_install.cmake
+/**/*_autogen/
+libSingleApplication.a
diff --git a/third_party/SingleApplication-3.0.19/CHANGELOG.md b/third_party/SingleApplication-3.1.3.1/CHANGELOG.md
index 36f1e261..3662b0b2 100644
--- a/third_party/SingleApplication-3.0.19/CHANGELOG.md
+++ b/third_party/SingleApplication-3.1.3.1/CHANGELOG.md
@@ -1,6 +1,40 @@
 Changelog
 =========
 
+If by accident I have forgotten to credit someone in the CHANGELOG, email me and I will fix it.
+
+__3.1.3.1__
+---------
+* CMake build system improvements
+* Fixed Clang Tidy warnings
+
+    _Hennadii Chernyshchyk_
+
+__3.1.3__
+---------
+* Improved `CMakeLists.txt`
+
+    _Hennadii Chernyshchyk_
+
+__3.1.2__
+---------
+
+* Fix a crash when exiting an application on Android and iOS
+
+    _Emeric Grange_
+
+__3.1.1a__
+----------
+
+* Added currentUser() method that returns the user the current instance is running as.
+
+    _Leander Schulten_
+
+__3.1.0a__
+----------
+
+* Added primaryUser() method that returns the user the primary instance is running as.
+
 __3.0.19__
 ----------
 
diff --git a/third_party/SingleApplication-3.0.19/CMakeLists.txt b/third_party/SingleApplication-3.1.3.1/CMakeLists.txt
index 076d514d..85dba84c 100644
--- a/third_party/SingleApplication-3.0.19/CMakeLists.txt
+++ b/third_party/SingleApplication-3.1.3.1/CMakeLists.txt
@@ -1,45 +1,34 @@
-cmake_minimum_required(VERSION 3.1.0)
+cmake_minimum_required(VERSION 3.7.0)
 
-project(SingleApplication)
+project(SingleApplication LANGUAGES CXX)
 
-set(CMAKE_INCLUDE_CURRENT_DIR ON)
 set(CMAKE_AUTOMOC ON)
 
-# SingleApplication base class
-set(QAPPLICATION_CLASS QCoreApplication CACHE STRING "Inheritance class for SingleApplication")
-set_property(CACHE QAPPLICATION_CLASS PROPERTY STRINGS QApplication QGuiApplication QCoreApplication)
-
-# Libary target
 add_library(${PROJECT_NAME} STATIC
     singleapplication.cpp
     singleapplication_p.cpp
-    )
+)
+add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
 
 # Find dependencies
-find_package(Qt5Network)
+find_package(Qt5 COMPONENTS Network REQUIRED)
+target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Network)
+
 if(QAPPLICATION_CLASS STREQUAL QApplication)
     find_package(Qt5 COMPONENTS Widgets REQUIRED)
+    target_link_libraries(${PROJECT_NAME} PUBLIC Qt5::Widgets)
 elseif(QAPPLICATION_CLASS STREQUAL QGuiApplication)
     find_package(Qt5 COMPONENTS Gui REQUIRED)
+    target_link_libraries(${PROJECT_NAME} PUBLIC Qt5::Gui)
 else()
+    set(QAPPLICATION_CLASS QCoreApplication)
     find_package(Qt5 COMPONENTS Core REQUIRED)
-endif()
-target_compile_definitions(${PROJECT_NAME} PUBLIC QAPPLICATION_CLASS=${QAPPLICATION_CLASS})
-
-# Link dependencies
-target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Network)
-if(QAPPLICATION_CLASS STREQUAL QApplication)
-    target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Widgets)
-elseif(QAPPLICATION_CLASS STREQUAL QGuiApplication)
-    target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Gui)
-else()
-    target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Core)
+    target_link_libraries(${PROJECT_NAME} PUBLIC Qt5::Core)
 endif()
 
 if(WIN32)
     target_link_libraries(${PROJECT_NAME} PRIVATE advapi32)
 endif()
 
+target_compile_definitions(${PROJECT_NAME} PUBLIC QAPPLICATION_CLASS=${QAPPLICATION_CLASS})
 target_include_directories(${PROJECT_NAME} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
-
-add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
diff --git a/third_party/SingleApplication-3.0.19/LICENSE b/third_party/SingleApplication-3.1.3.1/LICENSE
index 85b2a149..a82e5a68 100644
--- a/third_party/SingleApplication-3.0.19/LICENSE
+++ b/third_party/SingleApplication-3.1.3.1/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) Itay Grudev 2015 - 2016
+Copyright (c) Itay Grudev 2015 - 2020
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/third_party/SingleApplication-3.0.19/README.md b/third_party/SingleApplication-3.1.3.1/README.md
index 5d609865..3c36b557 100644
--- a/third_party/SingleApplication-3.0.19/README.md
+++ b/third_party/SingleApplication-3.1.3.1/README.md
@@ -1,5 +1,6 @@
 SingleApplication
 =================
+[![CI](https://github.com/itay-grudev/SingleApplication/workflows/CI:%20Build%20Test/badge.svg)](https://github.com/itay-grudev/SingleApplication/actions)
 
 This is a replacement of the QtSingleApplication for `Qt5`.
 
@@ -15,18 +16,6 @@ class you specify via the `QAPPLICATION_CLASS` macro (`QCoreApplication` is the
 default). Further usage is similar to the use of the `Q[Core|Gui]Application`
 classes.
 
-The library sets up a `QLocalServer` and a `QSharedMemory` block. The first
-instance of your Application is your Primary Instance. It would check if the
-shared memory block exists and if not it will start a `QLocalServer` and listen
-for connections. Each subsequent instance of your application would check if the
-shared memory block exists and if it does, it will connect to the QLocalServer
-to notify the primary instance that a new instance had been started, after which
-it would terminate with status code `0`. In the Primary Instance
-`SingleApplication` would emit the `instanceStarted()` signal upon detecting
-that a new instance had been started.
-
-The library uses `stdlib` to terminate the program with the `exit()` function.
-
 You can use the library as if you use any other `QCoreApplication` derived
 class:
 
@@ -43,8 +32,7 @@ int main( int argc, char* argv[] )
 ```
 
 To include the library files I would recommend that you add it as a git
-submodule to your project and include it's contents with a `.pri` file. Here is
-how:
+submodule to your project. Here is how:
 
 ```bash
 git submodule add git@github.com:itay-grudev/SingleApplication.git singleapplication
@@ -66,13 +54,27 @@ Then include the subdirectory in your `CMakeLists.txt` project file.
 ```cmake
 set(QAPPLICATION_CLASS QApplication CACHE STRING "Inheritance class for SingleApplication")
 add_subdirectory(src/third-party/singleapplication)
+target_link_libraries(${PROJECT_NAME} SingleApplication::SingleApplication)
 ```
 
+
+The library sets up a `QLocalServer` and a `QSharedMemory` block. The first
+instance of your Application is your Primary Instance. It would check if the
+shared memory block exists and if not it will start a `QLocalServer` and listen
+for connections. Each subsequent instance of your application would check if the
+shared memory block exists and if it does, it will connect to the QLocalServer
+to notify the primary instance that a new instance had been started, after which
+it would terminate with status code `0`. In the Primary Instance
+`SingleApplication` would emit the `instanceStarted()` signal upon detecting
+that a new instance had been started.
+
+The library uses `stdlib` to terminate the program with the `exit()` function.
+
 Also don't forget to specify which `QCoreApplication` class your app is using if it
 is not `QCoreApplication` as in examples above.
 
 The `Instance Started` signal
-------------------------
+-----------------------------
 
 The SingleApplication class implements a `instanceStarted()` signal. You can
 bind to that signal to raise your application's window when a new instance had
@@ -204,6 +206,22 @@ qint64 SingleApplication::primaryPid()
 
 Returns the process ID (PID) of the primary instance.
 
+---
+
+```cpp
+QString SingleApplication::primaryUser()
+```
+
+Returns the username the primary instance is running as.
+
+---
+
+```cpp
+QString SingleApplication::currentUser()
+```
+
+Returns the username the current instance is running as.
+
 ### Signals
 
 ```cpp
diff --git a/third_party/SingleApplication-3.1.3.1/SingleApplication b/third_party/SingleApplication-3.1.3.1/SingleApplication
new file mode 100644
index 00000000..8ead1a42
--- /dev/null
+++ b/third_party/SingleApplication-3.1.3.1/SingleApplication
@@ -0,0 +1 @@
+#include "singleapplication.h"
diff --git a/third_party/SingleApplication-3.0.19/Windows.md b/third_party/SingleApplication-3.1.3.1/Windows.md
index 13c52da0..13c52da0 100644
--- a/third_party/SingleApplication-3.0.19/Windows.md
+++ b/third_party/SingleApplication-3.1.3.1/Windows.md
diff --git a/third_party/SingleApplication-3.0.19/singleapplication.cpp b/third_party/SingleApplication-3.1.3.1/singleapplication.cpp
index 8ff8747a..9af38804 100644
--- a/third_party/SingleApplication-3.0.19/singleapplication.cpp
+++ b/third_party/SingleApplication-3.1.3.1/singleapplication.cpp
@@ -1,6 +1,6 @@
 // The MIT License (MIT)
 //
-// Copyright (c) Itay Grudev 2015 - 2018
+// Copyright (c) Itay Grudev 2015 - 2020
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
@@ -85,7 +85,7 @@ SingleApplication::SingleApplication( int &argc, char *argv[], bool allowSeconda
         }
     }
 
-    InstancesInfo* inst = static_cast<InstancesInfo*>( d->memory->data() );
+    auto *inst = static_cast<InstancesInfo*>( d->memory->data() );
     QElapsedTimer time;
     time.start();
 
@@ -172,7 +172,19 @@ qint64 SingleApplication::primaryPid()
     return d->primaryPid();
 }
 
-bool SingleApplication::sendMessage( QByteArray message, int timeout )
+QString SingleApplication::primaryUser()
+{
+    Q_D(SingleApplication);
+    return d->primaryUser();
+}
+
+QString SingleApplication::currentUser()
+{
+    Q_D(SingleApplication);
+    return d->getUsername();
+}
+
+bool SingleApplication::sendMessage( const QByteArray &message, int timeout )
 {
     Q_D(SingleApplication);
 
diff --git a/third_party/SingleApplication-3.0.19/singleapplication.h b/third_party/SingleApplication-3.1.3.1/singleapplication.h
index cb505971..fd806a3d 100644
--- a/third_party/SingleApplication-3.0.19/singleapplication.h
+++ b/third_party/SingleApplication-3.1.3.1/singleapplication.h
@@ -43,7 +43,7 @@ class SingleApplication : public QAPPLICATION_CLASS
 {
     Q_OBJECT
 
-    typedef QAPPLICATION_CLASS app_t;
+    using app_t = QAPPLICATION_CLASS;
 
 public:
     /**
@@ -86,7 +86,7 @@ public:
      * @see See the corresponding QAPPLICATION_CLASS constructor for reference
      */
     explicit SingleApplication( int &argc, char *argv[], bool allowSecondary = false, Options options = Mode::User, int timeout = 1000 );
-    ~SingleApplication();
+    ~SingleApplication() override;
 
     /**
      * @brief Returns if the instance is the primary instance
@@ -113,13 +113,25 @@ public:
     qint64 primaryPid();
 
     /**
+     * @brief Returns the username of the user running the primary instance
+     * @returns {QString}
+     */
+    QString primaryUser();
+
+    /**
+     * @brief Returns the username of the current user
+     * @returns {QString}
+     */
+    QString currentUser();
+
+    /**
      * @brief Sends a message to the primary instance. Returns true on success.
      * @param {int} timeout - Timeout for connecting
      * @returns {bool}
      * @note sendMessage() will return false if invoked from the primary
      * instance.
      */
-    bool sendMessage( QByteArray message, int timeout = 100 );
+    bool sendMessage( const QByteArray &message, int timeout = 100 );
 
 Q_SIGNALS:
     void instanceStarted();
diff --git a/third_party/SingleApplication-3.1.3.1/singleapplication.pri b/third_party/SingleApplication-3.1.3.1/singleapplication.pri
new file mode 100644
index 00000000..ae81f599
--- /dev/null
+++ b/third_party/SingleApplication-3.1.3.1/singleapplication.pri
@@ -0,0 +1,20 @@
+QT += core network
+CONFIG += c++11
+
+HEADERS += $$PWD/SingleApplication \
+    $$PWD/singleapplication.h \
+    $$PWD/singleapplication_p.h
+SOURCES += $$PWD/singleapplication.cpp \
+    $$PWD/singleapplication_p.cpp
+
+INCLUDEPATH += $$PWD
+
+win32 {
+    msvc:LIBS += Advapi32.lib
+    gcc:LIBS += -ladvapi32
+}
+
+DISTFILES += \
+    $$PWD/README.md \
+    $$PWD/CHANGELOG.md \
+    $$PWD/Windows.md
diff --git a/third_party/SingleApplication-3.0.19/singleapplication_p.cpp b/third_party/SingleApplication-3.1.3.1/singleapplication_p.cpp
index 884fe631..705609f2 100644
--- a/third_party/SingleApplication-3.0.19/singleapplication_p.cpp
+++ b/third_party/SingleApplication-3.1.3.1/singleapplication_p.cpp
@@ -1,6 +1,6 @@
 // The MIT License (MIT)
 //
-// Copyright (c) Itay Grudev 2015 - 2018
+// Copyright (c) Itay Grudev 2015 - 2020
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
@@ -69,18 +69,52 @@ SingleApplicationPrivate::~SingleApplicationPrivate()
         delete socket;
     }
 
-    memory->lock();
-    InstancesInfo* inst = static_cast<InstancesInfo*>(memory->data());
-    if( server != nullptr ) {
-        server->close();
-        delete server;
-        inst->primary = false;
-        inst->primaryPid = -1;
-        inst->checksum = blockChecksum();
+    if( memory != nullptr ) {
+        memory->lock();
+        auto *inst = static_cast<InstancesInfo*>(memory->data());
+        if( server != nullptr ) {
+            server->close();
+            delete server;
+            inst->primary = false;
+            inst->primaryPid = -1;
+            inst->primaryUser[0] =  '\0';
+            inst->checksum = blockChecksum();
+        }
+        memory->unlock();
+
+        delete memory;
     }
-    memory->unlock();
+}
 
-    delete memory;
+QString SingleApplicationPrivate::getUsername()
+{
+#ifdef Q_OS_WIN
+      wchar_t username[UNLEN + 1];
+      // Specifies size of the buffer on input
+      DWORD usernameLength = UNLEN + 1;
+      if( GetUserNameW( username, &usernameLength ) )
+          return QString::fromWCharArray( username );
+#if QT_VERSION < QT_VERSION_CHECK(5, 10, 0)
+      return QString::fromLocal8Bit( qgetenv( "USERNAME" ) );
+#else
+      return qEnvironmentVariable( "USERNAME" );
+#endif
+#endif
+#ifdef Q_OS_UNIX
+      QString username;
+      uid_t uid = geteuid();
+      struct passwd *pw = getpwuid( uid );
+      if( pw )
+          username = QString::fromLocal8Bit( pw->pw_name );
+      if ( username.isEmpty() ) {
+#if QT_VERSION < QT_VERSION_CHECK(5, 10, 0)
+          username = QString::fromLocal8Bit( qgetenv( "USER" ) );
+#else
+          username = qEnvironmentVariable( "USER" );
+#endif
+      }
+      return username;
+#endif
 }
 
 void SingleApplicationPrivate::genBlockServerName()
@@ -105,28 +139,7 @@ void SingleApplicationPrivate::genBlockServerName()
 
     // User level block requires a user specific data in the hash
     if( options & SingleApplication::Mode::User ) {
-#ifdef Q_OS_WIN
-        wchar_t username [ UNLEN + 1 ];
-        // Specifies size of the buffer on input
-        DWORD usernameLength = UNLEN + 1;
-        if( GetUserNameW( username, &usernameLength ) ) {
-            appData.addData( QString::fromWCharArray(username).toUtf8() );
-        } else {
-            appData.addData( qgetenv("USERNAME") );
-        }
-#endif
-#ifdef Q_OS_UNIX
-        QByteArray username;
-        uid_t uid = geteuid();
-        struct passwd *pw = getpwuid(uid);
-        if( pw ) {
-            username = pw->pw_name;
-        }
-        if( username.isEmpty() ) {
-            username = qgetenv("USER");
-        }
-        appData.addData(username);
-#endif
+        appData.addData( getUsername().toUtf8() );
     }
 
     // Replace the backslash in RFC 2045 Base64 [a-zA-Z0-9+/=] to comply with
@@ -136,10 +149,11 @@ void SingleApplicationPrivate::genBlockServerName()
 
 void SingleApplicationPrivate::initializeMemoryBlock()
 {
-    InstancesInfo* inst = static_cast<InstancesInfo*>( memory->data() );
+    auto *inst = static_cast<InstancesInfo*>( memory->data() );
     inst->primary = false;
     inst->secondary = 0;
     inst->primaryPid = -1;
+    inst->primaryUser[0] =  '\0';
     inst->checksum = blockChecksum();
 }
 
@@ -169,10 +183,12 @@ void SingleApplicationPrivate::startPrimary()
     );
 
     // Reset the number of connections
-    InstancesInfo* inst = static_cast <InstancesInfo*>( memory->data() );
+    auto *inst = static_cast <InstancesInfo*>( memory->data() );
 
     inst->primary = true;
     inst->primaryPid = q->applicationPid();
+    strncpy( inst->primaryUser, getUsername().toUtf8().data(), 127 );
+    inst->primaryUser[127] = '\0';
     inst->checksum = blockChecksum();
 
     instanceNumber = 0;
@@ -250,13 +266,25 @@ qint64 SingleApplicationPrivate::primaryPid()
     qint64 pid;
 
     memory->lock();
-    InstancesInfo* inst = static_cast<InstancesInfo*>( memory->data() );
+    auto *inst = static_cast<InstancesInfo*>( memory->data() );
     pid = inst->primaryPid;
     memory->unlock();
 
     return pid;
 }
 
+QString SingleApplicationPrivate::primaryUser()
+{
+    QByteArray username;
+
+    memory->lock();
+    auto *inst = static_cast<InstancesInfo*>( memory->data() );
+    username = inst->primaryUser;
+    memory->unlock();
+
+    return QString::fromUtf8( username );
+}
+
 /**
  * @brief Executed when a connection has been made to the LocalServer
  */
diff --git a/third_party/SingleApplication-3.0.19/singleapplication_p.h b/third_party/SingleApplication-3.1.3.1/singleapplication_p.h
index e2c361fb..29ba346b 100644
--- a/third_party/SingleApplication-3.0.19/singleapplication_p.h
+++ b/third_party/SingleApplication-3.1.3.1/singleapplication_p.h
@@ -1,6 +1,6 @@
 // The MIT License (MIT)
 //
-// Copyright (c) Itay Grudev 2015 - 2016
+// Copyright (c) Itay Grudev 2015 - 2020
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
@@ -42,14 +42,13 @@ struct InstancesInfo {
     quint32 secondary;
     qint64 primaryPid;
     quint16 checksum;
+    char primaryUser[128];
 };
 
 struct ConnectionInfo {
-    explicit ConnectionInfo() :
-        msgLen(0), instanceId(0), stage(0) {}
-    qint64 msgLen;
-    quint32 instanceId;
-    quint8 stage;
+    qint64 msgLen = 0;
+    quint32 instanceId = 0;
+    quint8 stage = 0;
 };
 
 class SingleApplicationPrivate : public QObject {
@@ -69,8 +68,9 @@ public:
     Q_DECLARE_PUBLIC(SingleApplication)
 
     SingleApplicationPrivate( SingleApplication *q_ptr );
-     ~SingleApplicationPrivate();
+    ~SingleApplicationPrivate() override;
 
+    QString getUsername();
     void genBlockServerName();
     void initializeMemoryBlock();
     void startPrimary();
@@ -78,6 +78,7 @@ public:
     void connectToPrimary(int msecs, ConnectionType connectionType );
     quint16 blockChecksum();
     qint64 primaryPid();
+    QString primaryUser();
     void readInitMessageHeader(QLocalSocket *socket);
     void readInitMessageBody(QLocalSocket *socket);