Could connect GVFS session bus from a root privilege program?

[danny <tornadory 163 com>]

Hi All,

I have a problem that I need get the information from GVFS(I thought it is), but the program run as root users.

I use g_volume_monitor_get() to get a monitor for the removable devices and do something while removable devices connect or disconnect, it works normally while run as  a plain user but failed when run as the root user.

How could I do?   Hope for someone give me any clue, and thanks in advance.

Below is my test program.

#include <gio/gio.h>
#include <gtk/gtk.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>

static void print_drive_info(GDrive *drive)
{
    gchar *name;
    name = g_drive_get_name(drive);
    g_print("\tname: %s\n",
        name ? name : "(null)");
    g_free(name);
}

static void on_drive_changed(GVolumeMonitor *volume_monitor, GDrive *drive)
{
    g_print("Drive changed:\n");
    print_drive_info(drive);
}

static void on_drive_connected(GVolumeMonitor *volume_monitor, GDrive *drive)
{
    g_print("Drive connected:\n");
    print_drive_info(drive);
}

static void on_drive_disconnected(GVolumeMonitor *volume_monitor, GDrive *drive)
{
    g_print("Drive disconnected:\n");
    print_drive_info(drive);
}


int main(int argc, char *argv[])
{
    GVolumeMonitor *monitor;
    gtk_init(&argc, &argv);
    #if 0
    /*the following is my test by setting euid */
    int old_uid = getuid();

    int old_euid = geteuid();

    printf("uid is %d \n euid is %d \n",getuid(), geteuid() );

    //if (setuid(500) == -1)

    if (seteuid(500) == -1)

    {

    printf ("seteuid : %s \n", strerror(errno));

    return -1;

    }

    printf("uid is %d \n euid is %d \n",getuid(), geteuid() );
    #endif
    monitor = g_volume_monitor_get();
    g_signal_connect(monitor, "drive-changed", G_CALLBACK(on_drive_changed), NULL);
    g_signal_connect(monitor, "drive-connected", G_CALLBACK(on_drive_connected), NULL);
    g_signal_connect(monitor, "drive-disconnected", G_CALLBACK(on_drive_disconnected), NULL);
 
    gtk_main();
    return 0;
}

--

 Best Regards,

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