From c3bee1c9ce143625ef41a5fa713acab23b2d9688 Mon Sep 17 00:00:00 2001
From: nashe <thomas@chauchefoin.fr>
Date: Sun, 4 Jun 2017 01:06:33 +0200
Subject: [PATCH] Correctly handle fopen() return value

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

diff --git a/main.c b/main.c
index d703030..4055294 100644
--- a/main.c
+++ b/main.c
@@ -3,6 +3,7 @@
 Released under the GNU GPL v3. See LICENSE for details. */
 
 #define _XOPEN_SOURCE
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -56,6 +57,10 @@ int main (int argc, char** argv) {
 	} else if (optind < argc) {
 		if (strcmp (argv [optind], "-") != 0)
 			op.f = fopen (argv[optind], "rb");
+			if (op.f == NULL) {
+				fprintf (stderr, "Impossible to open the file %s: %s\n", argv[optind], strerror(errno));
+				return 1;
+			}
         }
 
 	if (op.d) {
-- 
2.39.3