Dbus sample program does not work

[Ho Chi Bun Philip]

i.e. when I compiled the following program under scratchbox (the
development platform for N810). How to debug it? Dbus-monitor works and
can capture the Received message.

#include <glib.h>
#include <glib-object.h>
#include <dbus/dbus.h>
#include <dbus/dbus-glib.h>

#include "marshal.h"  /* The file generated from marshal.list via tool
glib-genmarshal */

/* pidgin dbus station name */
#define DBUS_SERVICE_PURPLE      "im.pidgin.purple.PurpleService"
#define DBUS_PATH_PURPLE         "/im/pidgin/purple/PurpleObject"
#define DBUS_INTERFACE_PURPLE    "im.pidgin.purple.PurpleInterface"

/* global dbus instance */
DBusGConnection *bus;
DBusGProxy *purple_proxy;


/* Main event loop */
GMainLoop *loop = NULL;

/* Signal callback handling routing */
void received_im_msg_cb (DBusGProxy *purple_proxy, unsigned int
account_id, 
                         const char *sender, const char *message, 
                         unsigned int conv_id, unsigned int flags,
                         gpointer user_data)
{
    g_print("Account %d receives msg \"%s\" from %s\n",   
            account_id, message, sender);
}

/*
 * The main process, loop waiting for any signals
 */
int main (int argc, char **argv)
{
    GError *error = NULL;
    
    g_type_init ();

    /* Get the bus */
    bus = dbus_g_bus_get (DBUS_BUS_SESSION, &error);
    if (bus == NULL) {
        g_printerr("Failed to open connection to bus: %s",
error->message);
        g_error_free(error);
        return -1;
    }

    /* Create a proxy object for the bus driver */
    purple_proxy = dbus_g_proxy_new_for_name (bus,
                                              DBUS_SERVICE_PURPLE,
                                              DBUS_PATH_PURPLE,
                                              DBUS_INTERFACE_PURPLE);
    
    if (!purple_proxy) {
        g_printerr("Couldn't connect to the Purple Service: %s",
error->message);
        g_error_free(error);
        return -1;
    }

    /* Create the main loop instance */
    loop = g_main_loop_new (NULL, FALSE);

    /* Register dbus signal marshaller */
 
dbus_g_object_register_marshaller(marshal_VOID__UINT_STRING_STRING_UINT_
UINT, 
                                      G_TYPE_NONE, G_TYPE_UINT,
G_TYPE_STRING, 
                                      G_TYPE_STRING, G_TYPE_UINT,
G_TYPE_UINT, 
                                      G_TYPE_INVALID);
        
    /* Add the signal to the proxy */
    dbus_g_proxy_add_signal(purple_proxy, "ReceivedImMsg", 
                            G_TYPE_UINT, G_TYPE_STRING, G_TYPE_STRING, 
                            G_TYPE_UINT, G_TYPE_UINT, G_TYPE_INVALID);

    /* Connect the signal handler to the proxy */
    dbus_g_proxy_connect_signal(purple_proxy, "ReceivedImMsg",
                                G_CALLBACK(received_im_msg_cb), bus,
NULL);

    /* Main loop */
    g_main_loop_run (loop);

    return 0;
}


-----Original Message-----
From: devel-bounces at pidgin.im [mailto:devel-bounces at pidgin.im] On Behalf
Of Ho Chi Bun Philip
Sent: Thursday, December 11, 2008 11:18 AM
To: devel at pidgin.im
Subject: Dbus sample program does not work


Hi

I am new to Dbus and Pidgin. I am trying the test program in Dbus
How-to. But the program does not work somehow.

http://developer.pidgin.im/wiki/DbusHowto

I have already defined marshaller functions for the signal handler and
able to compile it with the dbus simple C program to listen to signal
ReceivedImMsg.

When a buddy send a message through a Bonjour network, pidgin can show
the message. But there is no printout in the test program.

I have also tried changing the signal name to DisplayedImMsg but also no
response.

I doubt that different DBUS_SESSION_BUS_PID s is being used.

I mostly use N810 platform but I also tried Linux but to no avail.

Regards,
Philip



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