Unable to unmout the mount point in Fedora 9

["Vincent Guo" <vincent y guo gmail com>]

Hi Guys:

I used the following code to mount a volume,

#include <stdio.h>
#include <string.h>

#include <gio/gfile.h>

int main()
{
    g_type_init();
    GFile* file = g_file_new_for_uri("smb://10.32.100.25/public/joseph");
    GError *error = NULL;

    g_file_mount_enclosing_volume (file, 0, NULL, NULL, NULL, NULL);
    return (0);
}

and used the following code the unmount the mount point:

#include <stdio.h>
#include <string.h>
#include <gio/gio.h>
#include <gio/gfile.h>

static void
cb(GObject *object, GAsyncResult *res, gpointer user_data)
{
    g_print("cb Entry!\n");
    GError *error = NULL;
    gboolean ret = g_mount_unmount_finish(G_MOUNT (object), res, &error);
    if (!ret)
        g_print ("unmounting error!");
}

int main()
{
    g_type_init();
    GError  *error = NULL;
    GFile* file = g_file_new_for_uri("smb://10.32.100.25/public/joseph");
   
   
    GMount *mount = g_file_find_enclosing_mount (file, NULL, &error);
    if (mount == NULL)
        g_print("mount finding error(%s)\n", error->message);   
    else
        g_print("finding right\n");

    g_print ("%s\n", g_mount_get_name(mount));

    g_mount_unmount(mount, 0, NULL, cb, NULL);

       
    return (0);
}


it seems it can find the mount point correctly, but failed to unmount the mount point.
Can you help me out of this issue?


Thanks.

Vincent.