commit 1aa7eef17892069fab528c922d949c77c86f632b
from: Thomas <bthw@posteo.net>
date: Thu Mar 28 12:23:45 2019 UTC

added usage function

commit - 466ddf52d252337cc5206058df492fc0030700a0
commit + 1aa7eef17892069fab528c922d949c77c86f632b
blob - cd642dcbb0d6b067c63961c428b600b11c354e02
blob + 07485664b09e959b3c673eea681be0a78c665c99
--- id3r.c
+++ id3r.c
@@ -2,15 +2,15 @@
 
 #include "id3v1.h"
 
+void usage(void);
+
 int
 main(int argc, char *argv[])
 {
     FILE *f;
 
     if (argc != 2) {
-        fputs("usage: id3r filename\n", stderr);
-
-        exit(EXIT_FAILURE);
+        usage();
     }
 
     f = fopen(argv[1], "rb");
@@ -18,3 +18,11 @@ main(int argc, char *argv[])
 
     return EXIT_SUCCESS;
 }
+
+void
+usage(void)
+{
+    fputs("usage: id3r filename\n", stderr);
+
+    exit(EXIT_FAILURE);
+}