Convert domain events example to new API

Convert the domain events example program to use the new
events APIs for one of its callback registrations to demo the
new API and interoperability with the old API.

* examples/domain-events/events-c/event-test.c: Convert to
  new events API

examples/domain-events/events-c/event-test.c

@@ -38,10 +38,6 @@ void *t_opaque = NULL;
 
 /* Prototypes */
 const char *eventToString(int event);
-int myDomainEventCallback1 (virConnectPtr conn, virDomainPtr dom,
-                            int event, int detail, void *opaque);
-int myDomainEventCallback2 (virConnectPtr conn, virDomainPtr dom,
-                            int event, int detail, void *opaque);
 int myEventAddHandleFunc  (int fd, int event,
                            virEventHandleCallback cb,
                            void *opaque,
@@ -152,11 +148,11 @@ static const char *eventDetailToString(int event, int detail) {
     return ret;
 }
 
-int myDomainEventCallback1 (virConnectPtr conn ATTRIBUTE_UNUSED,
-                            virDomainPtr dom,
-                            int event,
-                            int detail,
-                            void *opaque ATTRIBUTE_UNUSED)
+static int myDomainEventCallback1(virConnectPtr conn ATTRIBUTE_UNUSED,
+                                  virDomainPtr dom,
+                                  int event,
+                                  int detail,
+                                  void *opaque ATTRIBUTE_UNUSED)
 {
     printf("%s EVENT: Domain %s(%d) %s %s\n", __func__, virDomainGetName(dom),
            virDomainGetID(dom), eventToString(event),
@@ -164,11 +160,11 @@ int myDomainEventCallback1 (virConnectPtr conn ATTRIBUTE_UNUSED,
     return 0;
 }
 
-int myDomainEventCallback2 (virConnectPtr conn ATTRIBUTE_UNUSED,
-                            virDomainPtr dom,
-                            int event,
-                            int detail,
-                            void *opaque ATTRIBUTE_UNUSED)
+static int myDomainEventCallback2(virConnectPtr conn ATTRIBUTE_UNUSED,
+                                  virDomainPtr dom,
+                                  int event,
+                                  int detail,
+                                  void *opaque ATTRIBUTE_UNUSED)
 {
     printf("%s EVENT: Domain %s(%d) %s %s\n", __func__, virDomainGetName(dom),
            virDomainGetID(dom), eventToString(event),
@@ -293,6 +289,7 @@ int main(int argc, char **argv)
     int sts;
     int callback1ret = -1;
     int callback2ret = -1;
+
     struct sigaction action_stop = {
         .sa_handler = stop
     };
@@ -310,7 +307,7 @@ int main(int argc, char **argv)
                           myEventRemoveTimeoutFunc);
 
     virConnectPtr dconn = NULL;
-    dconn = virConnectOpen (argv[1] ? argv[1] : NULL);
+    dconn = virConnectOpenReadOnly (argv[1] ? argv[1] : NULL);
     if (!dconn) {
         printf("error opening\n");
         return -1;
@@ -324,10 +321,14 @@ int main(int argc, char **argv)
     /* Add 2 callbacks to prove this works with more than just one */
     callback1ret = virConnectDomainEventRegister(dconn, myDomainEventCallback1,
                                                  strdup("callback 1"), myFreeFunc);
-    callback2ret = virConnectDomainEventRegister(dconn, myDomainEventCallback2,
-                                                 strdup("callback 2"), myFreeFunc);
-
-    if ((callback1ret == 0) && (callback2ret == 0) ) {
+    callback2ret = virConnectDomainEventRegisterAny(dconn,
+                                                    NULL,
+                                                    VIR_DOMAIN_EVENT_ID_LIFECYCLE,
+                                                    VIR_DOMAIN_EVENT_CALLBACK(myDomainEventCallback2),
+                                                    strdup("callback 2"), myFreeFunc);
+
+    if ((callback1ret != -1) &&
+        (callback2ret != -1)) {
         while(run) {
             struct pollfd pfd = { .fd = h_fd,
                               .events = h_event,
@@ -364,7 +365,7 @@ int main(int argc, char **argv)
 
         DEBUG0("Deregistering event handlers");
         virConnectDomainEventDeregister(dconn, myDomainEventCallback1);
-        virConnectDomainEventDeregister(dconn, myDomainEventCallback2);
+        virConnectDomainEventDeregisterAny(dconn, callback2ret);
 
     }