""" vws usb remove """
    address = find_usb(options, get_vm_devices(options.sock))
    answer = send_command(options.sock, "usb_del %s" % address)
    print answer

def cmd_list(options):
    """ vws list """
    import fnmatch
    count = 0
    search_path = [("private",os.path.join(pwd.getpwuid(os.getuid()).pw_dir, "VWs")),
                   ("shared",config.get("directories", "SharedVMs")),
                   ("autostart",config.get("directories", "AutostartVMs"))]

    maxlen = 0
    vms = []
    bridges = set()
    for (vmtype,dirname) in search_path:
        if not os.access(dirname + "/.", os.X_OK):
            continue
        for vmname in os.listdir(dirname):
            if os.access(dirname + "/" + vmname + "/start", os.X_OK):
                matches=False
                for p in options.pattern:
                    if fnmatch.fnmatch(vmname,p):
                        matches=True
                        break
                if not matches:
                    continue
                count += 1
                f = {"name":vmname}
                if maxlen < len(vmname):
                    maxlen = len(vmname)
                if options.state:
                    f["type"]=vmtype
                    sock = connect_vm(dirname + "/" + vmname)

cmds = args.add_subparsers(dest='command', help="sub-command help")
p = cmds.add_parser("list", help="List existing VWs",
                    description="List existing VWs")
p.add_argument("--state", action='store_const', const=True, default=False,
               dest='state', help='Show state of the machine')
p.add_argument("--usb", action='store_const', const=True, default=False,
               dest='usb', help='Show connected USB devices')
p.add_argument("pattern", nargs='*',default='*',help="Name patterns")
p = cmds.add_parser("version", help="show vws version")
p = cmds.add_parser("autostart",help="Autostart all VMs marked as autostartable")
p = cmds.add_parser("shutdown",help="shut down all running VMs")
p.add_argument("--wait",help="wait until all machines would be shoutdown",
    action="store_const", const=True, default=False, dest="wait")
p.add_argument("--timeout",type=int,default=90,
   help="how long to way for VMs shutdown before forcing it off")