From 49db542a2c1b9d5c47d4e02d830849eb1fcb1510 Mon Sep 17 00:00:00 2001
From: Timo Kilpilehto <timo@digizen.id>
Date: Mon, 3 Jun 2024 15:39:32 +0300
Subject: [PATCH] Fix#355 by aquiring exlusive transation lock

...as was done until commit 6347f0f removed this behaviour
---
 tool/src/main/java/pro/javacard/gptool/GPTool.java | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tool/src/main/java/pro/javacard/gptool/GPTool.java b/tool/src/main/java/pro/javacard/gptool/GPTool.java
index 59053c80..7e26c0d0 100644
--- a/tool/src/main/java/pro/javacard/gptool/GPTool.java
+++ b/tool/src/main/java/pro/javacard/gptool/GPTool.java
@@ -159,6 +159,7 @@ public static void main(String[] argv) {
             }
             reader = reader.map(e -> args.has(OPT_DEBUG) ? LoggingCardTerminal.getInstance(e) : e);
             c = reader.get().connect("*");
+            c.beginExclusive();
             ret = new GPTool().run(CardBIBO.wrap(c), argv);
         } catch (IllegalArgumentException e) {
             System.err.println("Invalid argument: " + e.getMessage());
@@ -170,6 +171,11 @@ public static void main(String[] argv) {
                 e.printStackTrace();
         } finally {
             if (c != null) {
+                try {
+                    c.endExclusive();
+                } catch (CardException e) {
+                    // Warn or ignore
+                }
                 try {
                     c.disconnect(resetOnDisconnect);
                 } catch (CardException e) {