From 5c80a0957df5d218f8fe9019228a039ad5e6f077 Mon Sep 17 00:00:00 2001
From: Con Kolivas <kernel@kolivas.org>
Date: Mon, 21 Feb 2011 13:29:45 +1100
Subject: [PATCH] Add usage() to failure to read stdin/out.

---
 main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/main.c b/main.c
index b397850..c8c46e2 100644
--- a/main.c
+++ b/main.c
@@ -912,10 +912,12 @@ int main(int argc, char *argv[])
 		if (!FORCE_REPLACE) {
 			if (STDIN && isatty(fileno((FILE *)stdin))) {
 				print_err("Will not read stdin from a terminal. Use -f to override.\n");
+				usage();
 				exit (1);
 			}
 			if (STDIN && isatty(fileno((FILE *)stdout))) {
 				print_err("Will not write stdout to a terminal. Use -f to override.\n");
+				usage();
 				exit (1);
 			}
 		}