#include <dbus/dbus.h>
#include <stdbool.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

static DBusConnection *conn;

int main(int argc, char* argv[])
{
   DBusError err;
   dbus_error_init(&err);

   DBusConnection *conn = dbus_bus_get(DBUS_BUS_SESSION, &err);
   if (NULL == conn)
      exit(1); 

   int ret = dbus_bus_request_name(conn, "test.server", DBUS_NAME_FLAG_REPLACE_EXISTING , &err);
   if (dbus_error_is_set(&err))
      exit(1); 

   for (;;) {
      DBusMessage *msg = dbus_message_new_signal("/test/server", "test.server.Event", "Broadcast");
      if (NULL == msg) 
         exit(1); 

      const char *action = "some-random-id";
      const char *prefix = "button";
      const char *name = "lid";

      /* !!!! we append only two arguments !!! */
      if (!dbus_message_append_args(msg, DBUS_TYPE_STRING, &action, DBUS_TYPE_STRING, &prefix, /*DBUS_TYPE_STRING, &name,*/ DBUS_TYPE_INVALID))
         exit(1);

      if (!dbus_connection_send(conn, msg, NULL))
         exit(1);

      dbus_connection_flush(conn);
      dbus_message_unref(msg);

      sleep(1);
   }

   return 0;
}