From 62b5c2aec12e6a3d305445ee1a88bc18ca0a1548 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 11 Oct 2013 05:22:00 +0200
Subject: [PATCH] bus: make PropertiesChanged emission work

---
 src/libsystemd-bus/sd-bus.c           | 14 ++++++--------
 src/libsystemd-bus/test-bus-objects.c | 27 ++++++++++++++++++++++++---
 2 files changed, 30 insertions(+), 11 deletions(-)

diff --git a/src/libsystemd-bus/sd-bus.c b/src/libsystemd-bus/sd-bus.c
index 542b5e8..11194af 100644
--- a/src/libsystemd-bus/sd-bus.c
+++ b/src/libsystemd-bus/sd-bus.c
@@ -3994,18 +3994,16 @@ static int emit_properties_changed_on_interface(
 
                 if (streq(c->interface, interface))
                         break;
-
-                r = node_vtable_get_userdata(bus, path, c, &u);
-                if (r < 0)
-                        return r;
-                if (r > 0)
-                        break;
         }
 
         if (!c)
                 return 0;
 
-        r = sd_bus_message_new_signal(bus, path, "org.freedesktop.DBus", "PropertiesChanged", &m);
+        r = node_vtable_get_userdata(bus, path, c, &u);
+        if (r <= 0)
+                return r;
+
+        r = sd_bus_message_new_signal(bus, path, "org.freedesktop.DBus.Properties", "PropertiesChanged", &m);
         if (r < 0)
                 return r;
 
@@ -4042,7 +4040,7 @@ static int emit_properties_changed_on_interface(
                 if (r < 0)
                         return r;
 
-                r = sd_bus_message_append(m, "s", *n);
+                r = sd_bus_message_append(m, "s", *property);
                 if (r < 0)
                         return r;
 
diff --git a/src/libsystemd-bus/test-bus-objects.c b/src/libsystemd-bus/test-bus-objects.c
index f3571cb..b4facda 100644
--- a/src/libsystemd-bus/test-bus-objects.c
+++ b/src/libsystemd-bus/test-bus-objects.c
@@ -36,8 +36,6 @@
 
 /* Test:
  *
- *   sd_bus_emit_properties_changed()
- *
  *   Add in:
  *
  *   automatic properties
@@ -134,6 +132,16 @@ static int value_handler(sd_bus *bus, const char *path, const char *interface, c
 
         assert_se(PTR_TO_UINT(userdata) == 30);
 
+        return 1;
+}
+
+static int notify_test(sd_bus *bus, sd_bus_message *m, void *userdata) {
+        int r;
+
+        assert_se(sd_bus_emit_properties_changed(bus, m->path, "org.freedesktop.systemd.ValueTest", "Value", NULL) >= 0);
+
+        r = sd_bus_reply_method_return(bus, m, NULL);
+        assert_se(r >= 0);
 
         return 1;
 }
@@ -148,7 +156,8 @@ static const sd_bus_vtable vtable[] = {
 
 static const sd_bus_vtable vtable2[] = {
         SD_BUS_VTABLE_START(0),
-        SD_BUS_PROPERTY("Value", "s", value_handler, 10, 0),
+        SD_BUS_METHOD("NotifyTest", "", "", 0, notify_test),
+        SD_BUS_PROPERTY("Value", "s", value_handler, 10, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
         SD_BUS_VTABLE_END
 };
 
@@ -347,6 +356,18 @@ static int client(struct context *c) {
         sd_bus_message_unref(reply);
         reply = NULL;
 
+        r = sd_bus_call_method(bus, "org.freedesktop.systemd.test", "/value/a", "org.freedesktop.systemd.ValueTest", "NotifyTest", &error, NULL, "");
+        assert_se(r >= 0);
+
+        r = sd_bus_process(bus, &reply);
+        assert_se(r > 0);
+
+        assert_se(sd_bus_message_is_signal(reply, "org.freedesktop.DBus.Properties", "PropertiesChanged"));
+        bus_message_dump(reply);
+
+        sd_bus_message_unref(reply);
+        reply = NULL;
+
         r = sd_bus_call_method(bus, "org.freedesktop.systemd.test", "/foo", "org.freedesktop.systemd.test", "Exit", &error, NULL, "");
         assert_se(r >= 0);
 
-- 
2.7.4