From 45ebed3754aa2814583f4d433155f87f24f5351f Mon Sep 17 00:00:00 2001
From: Thomas Jarosch <thomas.jarosch@intra2net.com>
Date: Mon, 24 Aug 2020 19:45:41 +0200
Subject: [PATCH] examples/bitbang_cbus.c: Check return value of fgets()

---
 examples/bitbang_cbus.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/examples/bitbang_cbus.c b/examples/bitbang_cbus.c
index b902b50..359097e 100644
--- a/examples/bitbang_cbus.c
+++ b/examples/bitbang_cbus.c
@@ -60,8 +60,9 @@ int main(void)
     while (1)
     {
         // Set bitmask from input
-        fgets(input, sizeof(input) - 1, stdin);
-        if (input[0] == '\n') break;
+        char *s = fgets(input, sizeof(input) - 1, stdin);
+        if (s == NULL || input[0] == '\n')
+            break;
         bitmask = strtol(input, NULL, 0);
         printf("Using bitmask 0x%02x\n", bitmask);
         f = ftdi_set_bitmode(ftdi, bitmask, BITMODE_CBUS);
-- 
1.7.1