text: // compile against PCSC  gcc -o scardtest TestSmartCardStatus.c -DPCSC=1 -I /usr/include/PCSC -lpcsclite
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #if defined(__APPLE__) || defined(PCSC)
  #include <PCSC/winscard.h>
  #include <PCSC/wintypes.h>
  #elif defined (__linux__)
  #include <winpr/crt.h>
  #include <winpr/smartcard.h>
  #include <winpr/synch.h>
  #else
  #include <winscard.h>
  #endif
  
  #if defined(PCSC)
  int main(int argc, char* argv[])
  #else
  int TestSmartCardStatus(int argc, char* argv[])
  #endif
  {
  	SCARDCONTEXT hContext;
  	LPSTR mszReaders;
  	DWORD cchReaders = 0;
  	DWORD err;
  	SCARDHANDLE hCard;
  	DWORD dwActiveProtocol;
  	char name[100];
  	char* aname = NULL;
  	char* aatr = NULL;
  	DWORD len;
  	BYTE atr[32];
  	DWORD atrlen = 32;
  	DWORD status = 0;
  	DWORD protocol = 0;
  	err = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &hContext);
  
  	if (err != SCARD_S_SUCCESS)
  	{
  		printf("ScardEstablishedContext: 0x%08x\n", err);
  		return -1;
  	}
  
  	err = SCardListReaders(hContext, "SCard$AllReaders", NULL, &cchReaders);
  
  	if (err != 0)
  	{
  		printf("ScardListReaders: 0x%08x\n", err);
  		return -1;
  	}
  
  	mszReaders = calloc(cchReaders, sizeof(char));
  
  	if (!mszReaders)
  	{
  		printf("calloc\n");
  		return -1;
  	}
  
  	err = SCardListReaders(hContext, "SCard$AllReaders", mszReaders, &cchReaders);
  
  	if (err != SCARD_S_SUCCESS)
  	{
  		printf("ScardListReaders: 0x%08x\n", err);
  		return -1;
  	}
  
  	printf("Reader: %s\n", mszReaders);
  	err = SCardConnect(hContext, mszReaders, SCARD_SHARE_SHARED, SCARD_PROTOCOL_T0 | SCARD_PROTOCOL_T1,
  	                   &hCard, &dwActiveProtocol);
  
  	if (err != SCARD_S_SUCCESS)
  	{
  		printf("ScardConnect: 0x%08x\n", err);
  		return -1;
  	}
  
  	free(mszReaders);
  
  
  	printf("# test 1 - get reader length\n");
  	err = SCardStatus(hCard, NULL, &len, NULL, NULL, NULL, NULL);
  	if (err != SCARD_S_SUCCESS)
  	{
  		printf("SCardStatus: 0x%08x\n", err);
  		return -1;
  	}
  	printf("reader name length: %u\n", len);
  
  
  	printf("# test 2 - get reader name value\n");
  	err = SCardStatus(hCard, name, &len, NULL, NULL, NULL, NULL);
  	if (err != SCARD_S_SUCCESS)
  	{
  		printf("SCardStatus: 0x%08x\n", err);
  		return -1;
  	}
  	printf("Reader name: %s (%ld)\n", name, strlen(name));
  
  
  	printf("# test 3 - get all values - pre allocated\n");
  	err = SCardStatus(hCard, name, &len, &status, &protocol, atr, &atrlen);
  	if (err != SCARD_S_SUCCESS)
  	{
  		printf("SCardStatus: 0x%08x\n", err);
  		return -1;
  	}
  	printf("Reader name: %s (%ld/len %u)\n", name, strlen(name), len);
  	printf("status: 0x%08X\n", status);
  	printf("proto: 0x%08X\n", protocol);
  	printf("atrlen: %u\n", atrlen);
  
  
  	printf("# test 4 - get all values - auto allocate\n");
  	len = atrlen = SCARD_AUTOALLOCATE;
  	err = SCardStatus(hCard, (LPSTR)&aname, &len, &status, &protocol, (LPBYTE)&aatr, &atrlen);
  	if (err != SCARD_S_SUCCESS)
  	{
  		printf("SCardStatus: 0x%08x\n", err);
  		return -1;
  	}
  	printf("Reader name: %s (%ld/%u)\n", aname, strlen(aname), len);
  	printf("status: 0x%08X\n", status);
  	printf("proto: 0x%08X\n", protocol);
  	printf("atrlen: %u\n", atrlen);
  	SCardFreeMemory(hContext, aname);
  	SCardFreeMemory(hContext, aatr);
  
  
  	printf("# test 5 - get status and protocol only\n");
  	err = SCardStatus(hCard, NULL, NULL, &status, &protocol, NULL, NULL);
  	if (err != SCARD_S_SUCCESS)
  	{
  		printf("SCardStatus: 0x%08x\n", err);
  		return -1;
  	}
  	printf("status: 0x%08X\n", status);
  	printf("proto: 0x%08X\n", protocol);
  
  
  	printf("# test 6 - get atr only auto allocated\n");
  	atrlen = SCARD_AUTOALLOCATE;
  	err = SCardStatus(hCard, NULL, NULL, NULL, NULL, (LPBYTE)&aatr, &atrlen);
  	if (err != SCARD_S_SUCCESS)
  	{
  		printf("SCardStatus: 0x%08x\n", err);
  		return -1;
  	}
  	printf("atrlen: %u\n", atrlen);
  	SCardFreeMemory(hContext, aatr);
  
  
  	printf("# test 7 - get atr only pre allocated\n");
  	atrlen = 32;
  	err = SCardStatus(hCard, NULL, NULL, NULL, NULL, atr, &atrlen);
  	if (err != SCARD_S_SUCCESS)
  	{
  		printf("SCardStatus: 0x%08x\n", err);
  		return -1;
  	}
  	printf("atrlen: %u\n", atrlen);
  	SCardDisconnect(hCard, SCARD_LEAVE_CARD);
  	SCardReleaseContext(hContext);
  
  	return 0;
  }
  