From c303b1abb41ed4467646de04a6ea963ecc87f72d Mon Sep 17 00:00:00 2001
From: Andrew Brooks <andrewgrantbrooks@gmail.com>
Date: Sat, 27 Jan 2018 14:27:57 -0600
Subject: [PATCH] Slight corrections to input event handling to prevent
 double-keypress events.

---
 barcode_service/barcode_service.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/barcode_service/barcode_service.c b/barcode_service/barcode_service.c
index 25f0433..3b6a186 100644
--- a/barcode_service/barcode_service.c
+++ b/barcode_service/barcode_service.c
@@ -102,13 +102,14 @@ decode_next_event(int fd)
     ssize_t n_read = read(fd, &event, sizeof(struct input_event));
     if (n_read != sizeof(struct input_event)) {
       fprintf(stderr, "Read interrupted!\n");
-      exit(1);
+      continue;
     }
 
     /*
      * If we received a keypress event, decode the keycode responsible.
+     * (Event value 1 = key depressed)
      */
-    if (event.type == EV_KEY) {
+    if (event.type == EV_KEY && event.value == 1) {
       switch (event.code) {
 #define DECODE_KEY(key_name, decode_char) case (KEY_##key_name): return decode_char
         DECODE_KEY(ENTER, '\n');