From 6fb61d3c1e5e1fcd97d4ef210d59fc63a4e1fd94 Mon Sep 17 00:00:00 2001
From: Unknown <gelotus@gmail.com>
Date: Tue, 30 Jun 2020 17:19:24 +0200
Subject: [PATCH] error handling

---
 utils/nfc-mfclassic.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/utils/nfc-mfclassic.c b/utils/nfc-mfclassic.c
index 7fa16d7..244af45 100644
--- a/utils/nfc-mfclassic.c
+++ b/utils/nfc-mfclassic.c
@@ -822,9 +822,17 @@ main(int argc, const char *argv[])
       }
       printf("Done.\n");
       fclose(pfDump);
+    } else {
+      nfc_close(pnd);
+      nfc_exit(context);
+      exit(EXIT_FAILURE);
     }
   } else if (atAction == ACTION_WRITE) {
-    write_card(unlock);
+    if (!write_card(unlock)) {
+      nfc_close(pnd);
+      nfc_exit(context);
+      exit(EXIT_FAILURE);
+    }
   }
 
   nfc_close(pnd);