From 843e6fb1a772703593ce4685cc83bdaaaba67138 Mon Sep 17 00:00:00 2001
From: Lieuwe Rooijakkers <lieuwerooijakkers@gmail.com>
Date: Fri, 2 Aug 2024 22:36:51 +0200
Subject: tak: lees errno

---
 src/rn.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/rn.c b/src/rn.c
index be4fed9..5d05322 100644
--- a/src/rn.c
+++ b/src/rn.c
@@ -1,3 +1,4 @@
+#include <errno.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -51,12 +52,17 @@ static void process(const char *fname, FILE *file, bool perFile, size_t *n) {
   size_t linen = 0;
 
   ssize_t nread = 0;
-  while ((nread = getline(&line, &linen, file)) != -1) {
+  while ((errno = 0, nread = getline(&line, &linen, file)) != -1) {
     printf("%6lu  %s", *n, line);
     *n += 1;
   }
 
   free(line);
+
+  if (errno != 0) {
+    printf("tak: fout bij lezen uit bestand '%s'\n", fname);
+    exit(1);
+  }
 }
 
 int entry_rn(int argc, char **argv) {
-- 
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