--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libcommon/atr.c	Thu Feb 11 22:28:45 2021 +0000
@@ -0,0 +1,30 @@
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <pcsclite.h>
+#include <winscard.h>
+#include <reader.h>
+#include "cardif.h"
+
+#define	MAX_ATR_BYTES	33
+
+retrieve_atr()
+{
+	u_char atrbuf[MAX_ATR_BYTES];
+	LONG rv;
+	DWORD dwAttrLen;
+	unsigned n;
+
+	dwAttrLen = MAX_ATR_BYTES;
+	rv = SCardGetAttrib(hCard, SCARD_ATTR_ATR_STRING, atrbuf, &dwAttrLen);
+	if (rv != SCARD_S_SUCCESS) {
+		fprintf(stderr, "SCardGetAttrib for ATR: %s\n",
+			pcsc_stringify_error(rv));
+		return(-1);
+	}
+	printf("ATR:");
+	for (n = 0; n < dwAttrLen; n++)
+		printf(" %02X", atrbuf[n]);
+	putchar('\n');
+	return(0);
+}