fix: store IPC file in application directory (#5226)

src/main.cpp

@@ -13,6 +13,7 @@
 #include "singletons/Settings.hpp"
 #include "singletons/Updates.hpp"
 #include "util/AttachToConsole.hpp"
+#include "util/IpcQueue.hpp"
 
 #include <QApplication>
 #include <QCommandLineParser>
@@ -62,6 +63,7 @@ int main(int argc, char **argv)
         box.exec();
         return 1;
     }
+    ipc::initPaths(paths.get());
 
     const Args args(a, *paths);
 

src/singletons/Paths.cpp

@@ -140,6 +140,13 @@ void Paths::initSubDirectories()
     this->pluginsDirectory = makePath("Plugins");
     this->themesDirectory = makePath("Themes");
     this->crashdumpDirectory = makePath("Crashes");
+#ifdef Q_OS_WIN
+    this->ipcDirectory = makePath("IPC");
+#else
+    // NOTE: We do *NOT* use IPC on non-Windows platforms.
+    // If we start, we should re-consider this directory.
+    this->ipcDirectory = "/tmp";
+#endif
 }
 
 }  // namespace chatterino

src/singletons/Paths.hpp

@@ -39,6 +39,11 @@ public:
     // Custom themes live here. <appDataDirectory>/Themes
     QString themesDirectory;
 
+    // Directory for shared memory files.
+    // <appDataDirectory>/IPC   on Windows
+    // /tmp                     elsewhere
+    QString ipcDirectory;
+
     bool createFolder(const QString &folderPath);
     [[deprecated("use Modes::instance().portable instead")]] bool isPortable()
         const;

src/util/IpcQueue.cpp

@@ -1,7 +1,9 @@
 #include "util/IpcQueue.hpp"
 
 #include "common/QLogging.hpp"
+#include "singletons/Paths.hpp"
 
+#define BOOST_INTERPROCESS_SHARED_DIR_FUNC
 #include <boost/interprocess/ipc/message_queue.hpp>
 #include <QByteArray>
 #include <QString>
@@ -9,8 +11,49 @@
 
 namespace boost_ipc = boost::interprocess;
 
+namespace {
+
+static const chatterino::Paths *PATHS = nullptr;
+
+}  // namespace
+
+namespace boost::interprocess::ipcdetail {
+
+void get_shared_dir(std::string &shared_dir)
+{
+    if (!PATHS)
+    {
+        assert(false && "PATHS not set");
+        qCCritical(chatterinoNativeMessage)
+            << "PATHS not set for shared directory";
+        return;
+    }
+    shared_dir = PATHS->ipcDirectory.toStdString();
+}
+
+#ifdef BOOST_INTERPROCESS_WINDOWS
+void get_shared_dir(std::wstring &shared_dir)
+{
+    if (!PATHS)
+    {
+        assert(false && "PATHS not set");
+        qCCritical(chatterinoNativeMessage)
+            << "PATHS not set for shared directory";
+        return;
+    }
+    shared_dir = PATHS->ipcDirectory.toStdWString();
+}
+#endif
+
+}  // namespace boost::interprocess::ipcdetail
+
 namespace chatterino::ipc {
 
+void initPaths(const Paths *paths)
+{
+    PATHS = paths;
+}
+
 void sendMessage(const char *name, const QByteArray &data)
 {
     try

src/util/IpcQueue.hpp

@@ -6,8 +6,16 @@
 class QByteArray;
 class QString;
 
+namespace chatterino {
+
+class Paths;
+
+}  // namespace chatterino
+
 namespace chatterino::ipc {
 
+void initPaths(const Paths *paths);
+
 void sendMessage(const char *name, const QByteArray &data);
 
 class IpcQueuePrivate;