From 262c25a77d9b15073118bfdd3a3fe9e3f7d6c194 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Tue, 4 Feb 2014 17:26:41 +0100
Subject: [PATCH] don't have duplicate tags in invertory

---
 lib/Biblio/RFID/Reader/librfid.pm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/Biblio/RFID/Reader/librfid.pm b/lib/Biblio/RFID/Reader/librfid.pm
index 72ea674..0f559fd 100644
--- a/lib/Biblio/RFID/Reader/librfid.pm
+++ b/lib/Biblio/RFID/Reader/librfid.pm
@@ -84,9 +84,10 @@ my $sid_iso;
 sub inventory {
 
 	my @tags; 
+	$sid_iso = {};
 	_grep_tool 'librfid-tool', '--scan' => sub {
 		my ( $sid, $iso ) = @_;
-		if ( $sid ) {
+		if ( $sid && ! exists $sid_iso->{$sid} ) {
 			push @tags, $sid;
 			$sid_iso->{$sid} = $iso;
 		}
-- 
2.20.1