private string SafelyGetString(string name)
{
try {
if (device.PropertyExists(name))
{
return(device[name]);
}
} catch {}
return(null);
}
public static UsbDevice Resolve(Hal.Manager manager, Hal.Device device)
{
if (device["info.subsystem"] == "usb_device" &&
device.PropertyExists("usb_device.product_id") &&
device.PropertyExists("usb_device.vendor_id"))
{
return(new UsbDevice(manager, device));
}
return(null);
}
public static BlockDevice Resolve <T> (Hal.Manager manager, Hal.Device device) where T : IBlockDevice
{
if (device.QueryCapability("block") && device.PropertyExists("block.device"))
{
if (typeof(T) == typeof(ICdromDevice))
{
return(CdromDevice.Resolve(manager, device));
}
else if (typeof(T) == typeof(IDiskDevice))
{
return(DiskDevice.Resolve(manager, device));
}
return((BlockDevice)CdromDevice.Resolve(manager, device)
?? (BlockDevice)DiskDevice.Resolve(manager, device));
}
return(null);
}
public bool PropertyExists(string key)
{
return(device.PropertyExists(key));
}
private static Stack <Hal.Device> CollectUsbDeviceStack(Hal.Device device)
{
Stack <Hal.Device> device_stack = new Stack <Hal.Device> ();
int usb_vendor_id = -1;
int usb_product_id = -1;
Hal.Device tmp_device = device;
while (tmp_device != null)
{
// Skip the SCSI parents of the volume if they are in the tree
if ((tmp_device.PropertyExists("info.bus") && tmp_device["info.bus"] == "scsi") ||
(tmp_device.PropertyExists("info.category") && tmp_device["info.category"] == "scsi_host"))
{
device_stack.Push(tmp_device);
tmp_device = tmp_device.Parent;
continue;
}
bool have_usb_ids = false;
int _usb_vendor_id = -1;
int _usb_product_id = -1;
// Figure out the IDs if they exist
if (tmp_device.PropertyExists("usb.vendor_id") &&
tmp_device.PropertyExists("usb.product_id"))
{
_usb_vendor_id = tmp_device.GetPropertyInteger("usb.vendor_id");
_usb_product_id = tmp_device.GetPropertyInteger("usb.product_id");
have_usb_ids = true;
}
else if (tmp_device.PropertyExists("usb_device.vendor_id") &&
tmp_device.PropertyExists("usb_device.product_id"))
{
_usb_vendor_id = tmp_device.GetPropertyInteger("usb_device.vendor_id");
_usb_product_id = tmp_device.GetPropertyInteger("usb_device.product_id");
have_usb_ids = true;
}
if (have_usb_ids)
{
if (usb_vendor_id == -1 && usb_product_id == -1)
{
// We found the first raw USB device, remember it
usb_vendor_id = _usb_vendor_id;
usb_product_id = _usb_product_id;
}
else if (usb_vendor_id != _usb_vendor_id || usb_product_id != _usb_product_id)
{
// We are no longer looking at the device we care about (could now be at a hub or something)
break;
}
}
else if (usb_vendor_id != -1 || usb_product_id != -1)
{
// We are no longer even looking at USB devices
break;
}
device_stack.Push(tmp_device);
tmp_device = tmp_device.Parent;
}
return(device_stack);
}