Le 26/08/2011 16:40, Ludovic Rousseau a écrit :
> 2011/8/25 Viktor Tarasov<viktor.tara...@gmail.com>:
>> In the OpenSC context the detached reader/token is unknown before the
>> SCardGetStatusChange() called.
>> In windows, XP or Vista, the ScardGetStatusChange called for unknown reader
>> returns SCARD_E_NO_READERS_AVAILABLE.
>>
>> The last revision of pcsc-lite, in such a case, returns the
>> SCARD_E_UNKNOWN_READER, which seems to be more appropriate to the situation.
> This is very strange. I do not have that on my Windows XP SP 3.
> I compile and run the following program:
>
> // pcsc.cpp : main project file.
>
> #include "stdafx.h"
> #include<stdio.h>
> #include<winscard.h>
>
> using namespace System;
>
> int main(array<System::String ^> ^args)
> {
> LONG rv;
> SCARDCONTEXT context;
> SCARD_READERSTATE readers[2];
>
> rv = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL,&context);
> printf("%08X\n", rv);
>
> readers[0].szReader = L"foo";
> readers[1].szReader = L"bar";
> rv = SCardGetStatusChange(context, 100, readers, 2);
> printf("%08X\n", rv);
>
> rv = SCardReleaseContext(context);
> printf("%08X\n", rv);
>
> return 0;
> }
>
> And I get as output:
> 00000000
> 80100009
> 00000000
>
> 80100009 is SCARD_E_UNKNOWN_READER.
> So I do not get SCARD_E_NO_READERS_AVAILABLE as you do.
Ok,
you have the SCARD_E_UNKNOWN_READER in the context of your test on 'your'
Windows,
I have SCARD_E_NO_READERS_AVAILABLE in the context of OpenSC on 'my' Windows .
On 'my' Windows your Python test gives 'SCARD_E_NO_READERS_AVAILABLE' .
I have no intention to perceive mysteries of Windows -- in any case both these
errors has to be treated by OpenSC (as well as different behavior of the
different pcsc-lite versions). And it's not complicated, because both these
SCARD_E errors are
translated by reader-pcsc.c into the same error SC_ERROR 'NO_READERS_FOUND'.
For the OpenSC there is no difference between two SCARD_E errors and this
difference has no impact onto the proposed solution for the bug with the
detached token .
Have you any comments for the proposed solution ?
> Bye
Kind regards,
Viktor.
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