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#! /usr/bin/env python3
# SCardGetStatusChange.py : Unit tests for unlock a SCardGetStatusChange()
# Copyright (C) 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.
"""
test SCardGetStatusChange in a loop
"""
from smartcard.scard import (
SCARD_E_TIMEOUT,
SCARD_S_SUCCESS,
SCARD_SCOPE_USER,
SCARD_STATE_UNAWARE,
SCardEstablishContext,
SCardGetErrorMessage,
SCardGetStatusChange,
SCardListReaders,
SCardReleaseContext,
)
hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER)
hresult, readers = SCardListReaders(hcontext, [])
# initialise the states of the readers
readerstates = {}
for reader in readers:
readerstates[reader] = (reader, SCARD_STATE_UNAWARE)
print("values", readerstates.values())
hresult, states = SCardGetStatusChange(hcontext, 0, list(readerstates.values()))
print(SCardGetErrorMessage(hresult))
print(states)
for state in states:
readername, eventstate, atr = state
print("readername:", readername)
print("eventstate:", hex(eventstate))
print("atr:", atr)
readerstates[readername] = (readername, eventstate)
print("values", readerstates.values())
try:
while True:
# timeout is 1000 ms
hresult, states = SCardGetStatusChange(
hcontext, 1000, list(readerstates.values())
)
if hresult not in (SCARD_S_SUCCESS, SCARD_E_TIMEOUT):
raise Exception(
"SCardGetStatusChange failed: " + SCardGetErrorMessage(hresult)
)
print(SCardGetErrorMessage(hresult))
print(states)
for state in states:
print(state)
readername, eventstate, atr = state
print("readername:", readername)
print("eventstate:", hex(eventstate))
print("atr:", atr)
readerstates[readername] = (readername, eventstate)
print("values", readerstates.values())
except KeyboardInterrupt:
hresult = SCardReleaseContext(hcontext)
print(SCardGetErrorMessage(hresult))
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