tak: lees errno

1 files changed, 7 insertions, 1 deletions

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) {