* DiscImageChef.Devices/Device/Constructor.cs:

Added support for USB on Linux.

	* DiscImageChef/Commands/DeviceInfo.cs:
	* DiscImageChef.Devices/Device/Variables.cs:
	  Added support for USB detection and metadata.

	* DiscImageChef.Devices/Linux/Extern.cs:
	* DiscImageChef.Devices/Linux/Command.cs:
	  Added readlink(3) support, for getting symlink destinations.

DiscImageChef.Devices/Device/Variables.cs

@@ -53,6 +53,13 @@ namespace DiscImageChef.Devices
         readonly string serial;
         readonly Decoders.SCSI.PeripheralDeviceTypes scsiType;
         readonly bool removable;
+        readonly bool usb;
+        readonly ushort usbVendor;
+        readonly ushort usbProduct;
+        readonly byte[] usbDescriptors;
+        readonly string usbManufacturerString;
+        readonly string usbProductString;
+        readonly string usbSerialString;
 
         /// <summary>
         /// Gets the Platform ID for this device
@@ -172,6 +179,10 @@ namespace DiscImageChef.Devices
             }
         }
 
+        /// <summary>
+        /// Gets the device's SCSI peripheral device type
+        /// </summary>
+        /// <value>The SCSI peripheral device type.</value>
         public Decoders.SCSI.PeripheralDeviceTypes SCSIType
         {
             get
@@ -180,6 +191,10 @@ namespace DiscImageChef.Devices
             }
         }
 
+        /// <summary>
+        /// Gets a value indicating whether this device's media is removable.
+        /// </summary>
+        /// <value><c>true</c> if this device's media is removable; otherwise, <c>false</c>.</value>
         public bool IsRemovable
         {
             get
@@ -187,6 +202,90 @@ namespace DiscImageChef.Devices
                 return removable;
             }
         }
+
+        /// <summary>
+        /// Gets a value indicating whether this device is attached via USB.
+        /// </summary>
+        /// <value><c>true</c> if this device is attached via USB; otherwise, <c>false</c>.</value>
+        public bool IsUSB
+        {
+            get
+            {
+                return usb;
+            }
+        }
+
+        /// <summary>
+        /// Gets the USB vendor ID.
+        /// </summary>
+        /// <value>The USB vendor ID.</value>
+        public ushort USBVendorID
+        {
+            get
+            {
+                return usbVendor;
+            }
+        }
+
+        /// <summary>
+        /// Gets the USB product ID.
+        /// </summary>
+        /// <value>The USB product ID.</value>
+        public ushort USBProductID
+        {
+            get
+            {
+                return usbProduct;
+            }
+        }
+
+        /// <summary>
+        /// Gets the USB descriptors.
+        /// </summary>
+        /// <value>The USB descriptors.</value>
+        public byte[] USBDescriptors
+        {
+            get
+            {
+                return usbDescriptors;
+            }
+        }
+
+        /// <summary>
+        /// Gets the USB manufacturer string.
+        /// </summary>
+        /// <value>The USB manufacturer string.</value>
+        public string USBManufacturerString
+        {
+            get
+            {
+                return usbManufacturerString;
+            }
+        }
+
+        /// <summary>
+        /// Gets the USB product string.
+        /// </summary>
+        /// <value>The USB product string.</value>
+        public string USBProductString
+        {
+            get
+            {
+                return usbProductString;
+            }
+        }
+
+        /// <summary>
+        /// Gets the USB serial string.
+        /// </summary>
+        /// <value>The USB serial string.</value>
+        public string USBSerialString
+        {
+            get
+            {
+                return usbSerialString;
+            }
+        }
     }
 }