new helper functions:

- _usb_ids completes on USB ids
- _pci_ids completes on PCI ids

bash_completion

@@ -522,6 +522,22 @@ _count_args()
 	done
 }
 
+# This function complete on PCI IDs
+#
+_pci_ids()
+{
+	COMPREPLY=( ${COMPREPLY[@]:-} \
+		$( compgen -W "$( lspci -n | awk '{print $3}')" -- $cur ) )
+}
+
+# This function complete on USB IDs
+#
+_usb_ids()
+{
+	COMPREPLY=( ${COMPREPLY[@]:-} \
+		$( compgen -W "$( lsusb | awk '{print $6}')" -- $cur ) )
+}
+
 # start of section containing completion functions for bash built-ins
 
 # bash alias completion