From 1cac8c8da585980160f88748822219d9bcaaec34 Mon Sep 17 00:00:00 2001
From: Andrew Brooks <andrewgrantbrooks@gmail.com>
Date: Thu, 25 Jan 2018 21:05:52 -0600
Subject: [PATCH] Don't publish empty barcodes

---
 barcode_service/barcode_service.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/barcode_service/barcode_service.c b/barcode_service/barcode_service.c
index d99a89b..9e12c7a 100644
--- a/barcode_service/barcode_service.c
+++ b/barcode_service/barcode_service.c
@@ -48,6 +48,11 @@ main(int argc, char **argv)
   while (true)
   {
     barcode = await_next_barcode(input_fd);
+    if (barcode[0] == '\x00')
+    {
+      /* Newline is pressed twice. Ignore any 'empty' barcodes. */
+      continue;
+    }
     if (zsock_send(zsock, "s", barcode) < 0)
     {
       fprintf(stderr, "Sending barcode failed!\n");