From b40ec45e5a0d4c1de8d9dbec29cf21a0603b424c Mon Sep 17 00:00:00 2001
From: frankmorgner <frankmorgner@96b47cad-a561-4643-ad3b-153ac7d7599c>
Date: Fri, 16 Apr 2010 14:08:13 +0000
Subject: [PATCH] added option to scan for available readers

git-svn-id: https://vsmartcard.svn.sourceforge.net/svnroot/vsmartcard@77 96b47cad-a561-4643-ad3b-153ac7d7599c
---
 ccid/ccid.c | 32 ++++++++++++++++++++++++++++++++
 ccid/ccid.h |  1 +
 ccid/usb.c  | 12 +++++++++++-
 3 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/ccid/ccid.c b/ccid/ccid.c
index 18dae11..88f1aa3 100644
--- a/ccid/ccid.c
+++ b/ccid/ccid.c
@@ -1313,3 +1313,35 @@ int ccid_testpace(u8 pin_id, const char *pin, size_t pinlen)
 
     return SC_ERROR_SLOT_NOT_FOUND;
 }
+
+int ccid_list_readers(int verbose)
+{
+	static sc_context_t *ctx = NULL;
+
+        int r;
+	r = sc_context_create(&ctx, NULL);
+	if (r) {
+		fprintf(stderr, "Failed to establish context: %s\n", sc_strerror(r));
+		return 1;
+	}
+        ctx->debug = verbose;
+
+	unsigned int i, rcount = sc_ctx_get_reader_count(ctx);
+	
+	if (rcount == 0) {
+		printf("No smart card readers found.\n");
+		return 0;
+	}
+	printf("Readers known about:\n");
+	printf("Nr.    Driver     Name\n");
+	for (i = 0; i < rcount; i++) {
+		sc_reader_t *screader = sc_ctx_get_reader(ctx, i);
+		printf("%-7d%-11s%s\n", i, screader->driver->short_name,
+		       screader->name);
+	}
+
+	if (ctx)
+		sc_release_context(ctx);
+
+	return 0;
+}
diff --git a/ccid/ccid.h b/ccid/ccid.h
index e41a21d..a3bb99e 100644
--- a/ccid/ccid.h
+++ b/ccid/ccid.h
@@ -265,6 +265,7 @@ struct hid_class_descriptor {
     __u8   bNumDescriptors;
 } __attribute__ ((packed));
 
+int ccid_list_readers(int verbose);
 int ccid_initialize(int reader_id, int verbose);
 void ccid_shutdown();
 
diff --git a/ccid/usb.c b/ccid/usb.c
index 8e88ba6..0768035 100644
--- a/ccid/usb.c
+++ b/ccid/usb.c
@@ -57,6 +57,7 @@ static int verbose    = 0;
 static int debug      = 0;
 static int dohid      = 0;
 static int doint      = 0;
+static int dolist     = 0;
 static u8  dopacetest = 0;
 static int usb_reader_num = -1;
 static const char *pin;
@@ -64,6 +65,7 @@ static const char *pin;
 #define OPT_HELP        'h'
 #define OPT_INTERRUPT   'n'
 #define OPT_READER      'r'
+#define OPT_LIST        'l'
 #define OPT_SERIAL      's'
 #define OPT_PIN         'i'
 #define OPT_PUK         'u'
@@ -78,6 +80,7 @@ static const struct option options[] = {
     /*{ "hid", no_argument, &dohid, 1 },*/
     { "help", no_argument, NULL, OPT_HELP },
     { "reader",	required_argument, NULL, OPT_READER },
+    { "list-reader", no_argument, NULL, OPT_LIST },
     { "test-pin", optional_argument, NULL, OPT_PIN },
     { "test-puk", optional_argument, NULL, OPT_PUK },
     { "test-can", optional_argument, NULL, OPT_CAN },
@@ -94,6 +97,7 @@ static const char *option_help[] = {
     /*"Emulate HID device",*/
     "Print help and exit",
     "Number of reader to use (default: auto-detect)",
+    "Lists all configured readers",
     "Run PACE with PIN",
     "Run PACE with PUK",
     "Run PACE with CAN",
@@ -1768,7 +1772,7 @@ main (int argc, char **argv)
     }
 
     while (1) {
-        c = getopt_long(argc, argv, "hnr:s:i::u::a::z::p:e:vo", options, &long_optind);
+        c = getopt_long(argc, argv, "hnr:ls:i::u::a::z::p:e:vo", options, &long_optind);
         if (c == -1)
             break;
         if (c == '?' || c == OPT_HELP) {
@@ -1780,6 +1784,9 @@ main (int argc, char **argv)
                 if (sscanf(optarg, "%d", &usb_reader_num) != 1)
                     parse_error(argv[0], optarg, long_optind);
                 break;
+            case OPT_LIST:
+                dolist++;
+                break;
             case OPT_SERIAL:
                 if (sscanf(optarg, "%56s", serial) != 1)
                     parse_error(argv[0], optarg, long_optind);
@@ -1823,6 +1830,9 @@ main (int argc, char **argv)
         }
     }
 
+    if (dolist)
+        return ccid_list_readers(verbose);
+
     if (ccid_initialize(usb_reader_num, verbose) < 0) {
         perror("Can't initialize ccid");
         return 1;