dbus glib绑定UDisks错误

void device_added() 
{ 
    printf("Added \n"); 
    g_main_loop_quit (loop); 
} 

void device_removed() 
{ 
    printf("Removed\n"); 
    g_main_loop_quit (loop); 
} 

int 
main (int argc, char **argv) 
{ 
    DBusGConnection *connection; 
    DBusMessage* message; 
    GError *error; 
    DBusGProxy *proxy; 
    char **name_list; 
    char **name_list_ptr; 
    gchar *m1; 
    gchar *m2; 

    g_type_init(); 

    error = NULL; 
    connection = dbus_g_bus_get(DBUS_BUS_SYSTEM,NULL); 

    if (connection == NULL) 
    { 
     g_printerr ("Failed to open connection to bus: %s\n", 
        error->message); 
     g_error_free (error); 
     exit (1); 
    } 


    /* Create a proxy object for the "bus driver" (name "org.freedesktop.DBus") */ 
    proxy=dbus_g_proxy_new_for_name(connection,"org.freedesktop.UDisks","/org/freedesktop/UDisks","org.freedesktop.UDisks"); 

    if(proxy == NULL) 
    { 
     g_printerr ("Failed To Create A proxy...: %s\n", error->message); 
     g_error_free (error); 
     exit(1); 
    } 
    else 
     printf("Probably got a connection to the correct interface...\n"); 


    m1=g_cclosure_marshal_VOID__STRING; 
    m2=g_cclosure_marshal_VOID__STRING; 

    dbus_g_object_register_marshaller(m1,G_TYPE_BOOLEAN,G_TYPE_STRING,G_TYPE_INVALID); 

    dbus_g_object_register_marshaller(m2,G_TYPE_BOOLEAN,G_TYPE_STRING,G_TYPE_INVALID); 

    dbus_g_proxy_add_signal(proxy,"DeviceAdded",G_TYPE_INVALID); 
    dbus_g_proxy_add_signal(proxy,"DeviceRemoved",G_TYPE_INVALID); 

    dbus_g_proxy_connect_signal(proxy,"DeviceAdded",(GCallback)device_added,NULL,NULL); 

    dbus_g_proxy_connect_signal(proxy,"DeviceRemoved",(GCallback)device_removed,NULL,NULL); 

    loop=g_main_loop_new(NULL,FALSE); 

    g_main_loop_run (loop); 

    return 0; 
}

我想检测usb事件，我使用org.freedesktop.UDisks接口的DeviceAdded和DeviceRemoved信号。但device_added或device_removed不是geting调用，任何人都可以请告诉我上面的代码有什么问题吗？dbus glib绑定UDisks错误

来源

2012-06-13 123456

/* 
Compile using the command 
* gcc -o dbus-usb dbus-usb.c `pkg-config --libs --cflags dbus-glib-1` 
*/ 
#include <stdio.h> 
#include <stdlib.h> 
#include <sys/stat.h> 
#include <dbus/dbus.h> 
#include <dbus/dbus-glib.h> 
#include <glib.h> 
#include <glib-object.h> 

static GMainLoop *loop; 

static void 
device_added (DBusGProxy *proxy, 
     char *ObjectPath[], 
     char *word_eol[], 
     guint hook_id, 
     guint context_id, 
     gpointer user_data) 
{ 
    g_debug("\nAdded a New Device:\nObjectPath: %s\nhook_id: %d\ncontext_id: %d\nuser_data: %d\n", (char*)ObjectPath, hook_id, context_id, (int)user_data); 
} 


static void 
device_removed (DBusGProxy *proxy, 
     char *ObjectPath[], 
     char *word_eol[], 
     guint hook_id, 
     guint context_id, 
     gpointer user_data) 
{ 
    g_debug("\nRemoved Device\nObjectPath: %s\nhook_id: %d\ncontext_id: %d\nuser_data: %d\n", (char*)ObjectPath, hook_id, context_id, (int)user_data); 
} 

int 
main (int argc, char **argv) 
{ 
    DBusGConnection *connection; 
    DBusMessage* message; 
    GError *error; 
    DBusGProxy *proxy; 
    gchar *m1; 
    gchar *m2; 
    char *object_path; 
    GPtrArray* ret; 

    g_type_init(); 

    error = NULL; 
    connection = dbus_g_bus_get(DBUS_BUS_SYSTEM,NULL); 

    if (connection == NULL) 
    { 
     g_printerr ("Failed to open connection to bus: %s\n", 
        error->message); 
     g_error_free (error); 
     exit (1); 
    } 
    else 
    { 
     printf("Got a connection to DBUS_BUS_SYSTEM\n"); 
    } 


    /* Create a proxy object for the "bus driver" (name "org.freedesktop.DBus") */ 

    proxy=dbus_g_proxy_new_for_name(connection,"org.freedesktop.UDisks","/org/freedesktop/UDisks","org.freedesktop.UDisks"); 

    if(proxy == NULL) 
    { 
     g_printerr ("Failed To Create A proxy...: %s\n", error->message); 
     g_error_free (error); 
     exit(1); 
    } 
    else 
     printf("Probably got a connection to the correct interface...\n"); 
//It works for me without marsheller register, add and connect to the signals directly 
    m1=g_cclosure_marshal_VOID__STRING; 
    m2=g_cclosure_marshal_VOID__STRING; 

    dbus_g_object_register_marshaller(m1,G_TYPE_NONE,G_TYPE_STRING,G_TYPE_INVALID); 

    dbus_g_object_register_marshaller(m2,G_TYPE_NONE,G_TYPE_STRING,G_TYPE_INVALID); 

    dbus_g_proxy_add_signal(proxy,"DeviceAdded",DBUS_TYPE_G_OBJECT_PATH, G_TYPE_INVALID); 
    dbus_g_proxy_connect_signal(proxy,"DeviceAdded",(GCallback)device_added,NULL,NULL); 

    dbus_g_proxy_add_signal(proxy,"DeviceRemoved",DBUS_TYPE_G_OBJECT_PATH, G_TYPE_INVALID); 
    dbus_g_proxy_connect_signal(proxy,"DeviceRemoved",(GCallback)device_removed,NULL,NULL); 

    loop=g_main_loop_new(NULL,FALSE); 

    g_main_loop_run (loop); 

    g_error_free (error); 

    return 0; 
}

上面的代码工作，能够检测在Ubuntu电脑的USB事件，主要的变化是在DBUS_TYPE_G_OBJECT_PATH参数dbus_g_proxy_add_signal函数，而不是G_TYPE_STRING。

但如果我交叉编译为ARM架构并执行ARM板一样，我也同时启动

dbus-daemon --system

后面临同样的问题再次

来源

2012-06-14 07:01:02 123456

我得到它的工作在ARM和

/usr/libexec/udisks-daemon

来源

2012-06-14 12:20:40 123456

dbus glib绑定UDisks错误

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