From 6dc68905dc9f12fad4fd28eff839b0877a40cfe4 Mon Sep 17 00:00:00 2001
From: Julien Danjou <julien@danjou.info>
Date: Wed, 19 Aug 2009 16:16:14 +0200
Subject: [PATCH] dbus: check for signal uniqness

Signed-off-by: Julien Danjou <julien@danjou.info>
---
 dbus.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/dbus.c b/dbus.c
index d5f88d5cf..7c6572d61 100644
--- a/dbus.c
+++ b/dbus.c
@@ -651,7 +651,12 @@ luaA_dbus_add_signal(lua_State *L)
 {
     const char *name = luaL_checkstring(L, 1);
     luaA_checkfunction(L, 2);
-    signal_add(&dbus_signals, name, luaA_object_ref(L, 2));
+    signal_t *sig = signal_array_getbyid(&dbus_signals,
+                                         a_strhash((const unsigned char *) name));
+    if(sig)
+        luaA_warn(L, "cannot add signal %s on D-Bus, already existing", name);
+    else
+        signal_add(&dbus_signals, name, luaA_object_ref(L, 2));
     return 0;
 }