Add a --launch option to appcontroller

This will trigger a "fire and forget" mode where we won't bother with
the server sockets. This allows launching multiple apps with appcontroller
without killing the previous one.

This is the preferred approach to launch Wayland applications. We still would
like to use appcontroller (to set up the environment) but killing the previous
app is not desirable. Tooling does not need to be considered now.

Change-Id: I9119d622b12aaf79cfb2e68c95bacd079dffeb52
Reviewed-by: Rainer Keller <[email protected]>

Author: alpqr

main.cpp

@@ -223,6 +223,7 @@ int main(int argc, char **argv)
     quint16 gdbDebugPort = 0;
     bool useGDB = false;
     bool useQML = false;
+    bool fireAndForget = false;
     Utils::PortList range;
 
     if (args.isEmpty()) {
@@ -254,6 +255,8 @@ int main(int argc, char **argv)
         } else if (arg == "--stop") {
             stop();
             return 0;
+        } else if (arg == "--launch") {
+            fireAndForget = true;
         } else if (arg == "--show-platform") {
             printf("base:%s\nplatform:%s\n",
                 config.base.toLocal8Bit().constData(),
@@ -323,7 +326,7 @@ int main(int argc, char **argv)
         defaultArgs.push_front("gdbserver");
     }
 
-    if (createServerSocket() != 0) {
+    if (!fireAndForget && createServerSocket() != 0) {
         fprintf(stderr, "Could not create serversocket\n");
         return 1;
     }
@@ -338,7 +341,8 @@ int main(int argc, char **argv)
     process.setSocketNotifier(new QSocketNotifier(serverSocket, QSocketNotifier::Read, &process));
     process.start(defaultArgs);
     app.exec();
-    close(serverSocket);
+    if (!fireAndForget)
+        close(serverSocket);
     return 0;
 }