always create txt MAD dump, but invoke vi only with MAD=1

diff --git a/nfc-card-dumper.pl b/nfc-card-dumper.pl
index bef1652..41f6691 100755 (executable)
--- a/nfc-card-dumper.pl
+++ b/nfc-card-dumper.pl
@@ -100,7 +100,8 @@ if ($r->init()) {
        }
 
        # view dump
-       $ENV{MAD} && system "./mifare-mad.pl $out_file | vi -R -";
+       system "./mifare-mad.pl $out_file > $out_file.txt";
+       $ENV{MAD} && system "vi $out_file.txt";
 
 }