old_contents: #! /usr/bin/env python
  
  #   control_switch_interface.py: switch interface on the GemProx DU
  #   Copyright (C) 2009  Ludovic Rousseau
  #
  #   This program is free software; you can redistribute it and/or modify
  #   it under the terms of the GNU General Public License as published by
  #   the Free Software Foundation; either version 2 of the License, or
  #   (at your option) any later version.
  #
  #   This program is distributed in the hope that it will be useful,
  #   but WITHOUT ANY WARRANTY; without even the implied warranty of
  #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  #   GNU General Public License for more details.
  #
  #   You should have received a copy of the GNU General Public License along
  #   with this program; if not, write to the Free Software Foundation, Inc.,
  #   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  
  from smartcard.pcsc.PCSCReader import readers
  from smartcard.pcsc.PCSCPart10 import *
  from smartcard.util import toHexString
  
  
  def switch_interface(interface):
      for reader in readers():
          cardConnection = reader.createConnection()
          cardConnection.connect(mode=SCARD_SHARE_DIRECT, disposition=SCARD_LEAVE_CARD)
  
          switch_interface = [0x52, 0xF8, 0x04, 0x01, 0x00, interface]
          IOCTL_SMARTCARD_VENDOR_IFD_EXCHANGE = SCARD_CTL_CODE(1)
          print "Reader:", reader, "=>",
          try:
              res = cardConnection.control(IOCTL_SMARTCARD_VENDOR_IFD_EXCHANGE,
                  switch_interface)
          except:
              print "FAILED"
          else:
              if res != [0, 0, 0, 0]:
                  print "Failed: ",
                  err = res[0] * 256 + res[1]
                  if err == 0xFF83:
                      print "Wrong data parameters"
                  elif err == 0xFF84:
                      print "Wrong command bytes"
                  else:
                      print "Unknown error:", map(hex, res)
              else:
                  print "Success"
  
  if __name__ == "__main__":
      import sys
  
      # 01h = Switch to contactless interface
      # 02h = Switch to contact interface
  
      # switch to contactless by default
      interface = 0x01
      if len(sys.argv) > 1:
          interface = int(sys.argv[1])
  
      switch_interface(interface)
  
new_contents: #! /usr/bin/env python
  
  """
  #   control_switch_interface.py: switch interface on the GemProx DU
  #   Copyright (C) 2009-2010  Ludovic Rousseau
  """
  #
  #   This program is free software; you can redistribute it and/or modify
  #   it under the terms of the GNU General Public License as published by
  #   the Free Software Foundation; either version 2 of the License, or
  #   (at your option) any later version.
  #
  #   This program is distributed in the hope that it will be useful,
  #   but WITHOUT ANY WARRANTY; without even the implied warranty of
  #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  #   GNU General Public License for more details.
  #
  #   You should have received a copy of the GNU General Public License along
  #   with this program; if not, write to the Free Software Foundation, Inc.,
  #   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  
  from smartcard.pcsc.PCSCReader import readers
  from smartcard.pcsc.PCSCPart10 import (SCARD_SHARE_DIRECT,
      SCARD_LEAVE_CARD, SCARD_CTL_CODE)
  
  IOCTL_SMARTCARD_VENDOR_IFD_EXCHANGE = SCARD_CTL_CODE(1)
  
  
  def switch_interface(interface):
      """
      switch from contact to contactless (or reverse) on a GemProx DU reader
      """
      for reader in readers():
          cardConnection = reader.createConnection()
          cardConnection.connect(mode=SCARD_SHARE_DIRECT, disposition=SCARD_LEAVE_CARD)
  
          switch_interface_cmd = [0x52, 0xF8, 0x04, 0x01, 0x00, interface]
          print "Reader:", reader, "=>",
          try:
              res = cardConnection.control(IOCTL_SMARTCARD_VENDOR_IFD_EXCHANGE,
                  switch_interface_cmd)
          except:
              print "FAILED"
          else:
              if res != [0, 0, 0, 0]:
                  print "Failed: ",
                  err = res[0] * 256 + res[1]
                  if err == 0xFF83:
                      print "Wrong data parameters"
                  elif err == 0xFF84:
                      print "Wrong command bytes"
                  else:
                      print "Unknown error:", map(hex, res)
              else:
                  print "Success"
  
  if __name__ == "__main__":
      import sys
  
      # 01h = Switch to contactless interface
      # 02h = Switch to contact interface
  
      # switch to contactless by default
      interface = 0x01
      if len(sys.argv) > 1:
          interface = int(sys.argv[1])
  
      switch_interface(interface)
  
subject: make pylint happier