[Pcsclite-muscle] How to dectect card status?

[Carlos Almeida Jr.]

Hello!

I'm developing an application that needs to detect when a card is
removed from the reader.

I tried to use:

// fragment #1
m_readerState = new SCARD_READERSTATE[1];
m_readerState->szReader = m_readerModel;
SCardGetStatusChange(m_cardContext, 100000000, m_readerState, 1);
qDebug() << ">> Reader status" << m_readerState->dwCurrentState;

if(l_readerStatus == SCARD_STATE_PRESENT) {
   qDebug() << "card still present";
} else {
   qDebug() << "card not present";
}
// ---
// >> m_readerState->dwCurrentState always returns something like 94893093710928

or
// fragment #2
m_readerState = new SCARD_READERSTATE[1];
m_readerState->szReader = m_readerModel; // or "\\\\?PnP?\\Notification";
m_readerState->cbAtr = 0;
m_readerState->dwCurrentState = 0;
m_readerState->dwEventState = 0;
while(true) {
    SCardGetStatusChange(m_cardContext, 500, m_readerState, 1);
    qDebug() << ">> Reader status" << m_readerState->dwCurrentState <<
" --- " << SCARD_STATE_PRESENT;
}
// ---


// >> m_readerState->dwCurrentState always returns 0

m_cardContext and m_readerState are correctly defined and I'm able to
read cards but not to identify when it is disconnected.

Someone can help me?

Regards,
Carlos
Carlos Almeida Jr