Ensure that only one browser-switchboard is active at any time

[browser-switch] / main.c

diff --git a/main.c b/main.c
index 5296631..2dfe439 100644 (file)
--- a/main.c
+++ b/main.c
@@ -103,6 +103,7 @@ int main() {
        OssoBrowser *obj_osso_browser, *obj_osso_browser_req;
        GMainLoop *mainloop;
        GError *error = NULL;
        OssoBrowser *obj_osso_browser, *obj_osso_browser_req;
        GMainLoop *mainloop;
        GError *error = NULL;

+       int reqname_result;

 
        read_config(0);
 
 
        read_config(0);
 

@@ -146,6 +147,27 @@ int main() {
                return 1;
        }
 
                return 1;
        }
 

+       /* Get the org.maemo.garage.browser-switchboard name from D-Bus, as
+          a form of locking to ensure that not more than one
+          browser-switchboard process is active at any time.  With
+          DBUS_NAME_FLAG_DO_NOT_QUEUE set and DBUS_NAME_FLAG_REPLACE_EXISTING
+          not set, getting the name succeeds if and only if no other
+          process owns the name. */
+       if (!dbus_g_proxy_call(ctx.dbus_proxy, "RequestName", &error,
+                              G_TYPE_STRING, "org.maemo.garage.browser-switchboard",
+                              G_TYPE_UINT, DBUS_NAME_FLAG_DO_NOT_QUEUE,
+                              G_TYPE_INVALID,
+                              G_TYPE_UINT, &reqname_result,
+                              G_TYPE_INVALID)) {
+               printf("Couldn't acquire browser-switchboard lock: %s\n",
+                      error->message);
+               return 1;
+       }
+       if (reqname_result != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {  
+               printf("Another browser-switchboard already running\n");
+               return 1;
+       }
+

        dbus_request_osso_browser_name(&ctx);
 
        /* Register ourselves to handle the osso_browser D-Bus methods */
        dbus_request_osso_browser_name(&ctx);
 
        /* Register ourselves to handle the osso_browser D-Bus methods */