main.cpp: support sessions when multiple users have opened Kristall

Before this change, only the first user who had opened kristall had working ipc.

The easiest fix was to prepend an username to the socket
and that's exactly what it does on Windows.

On Linux and other UNIX systems, we could do that too, but I came up with a bit
different approach.  I didn't like the fact that Qt puts sockets in /tmp,
but luckily we can provide the full path for the socket (Windows uses pipes,
so that's why it has its own case).  I've changed it to put sockets in
the runtime directory, because it's designed for that type of files
and it's user-specific, so we don't even have to prepend the username to it.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/main.cpp b/src/main.cpp
index c9a622c..358b91f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -148,7 +148,13 @@ MainWindow * getFocusedAppWindow()
 // the same machine.
 namespace ipc
 {
-    static char const * socket_name = "net.random-projects.kristall";
+    static const QString socket_name =
+#ifdef Q_OS_UNIX
+        QStandardPaths::writableLocation(QStandardPaths::RuntimeLocation) + "/"
+#elif defined Q_OS_WIN32
+        qEnvironmentVariable("USERNAME") + "-"
+#endif
+        "net.random-projects.kristall";
 
     struct Message
     {