From 4b91b88fcb73e928415bda80090b98b2d3806ff1 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Fri, 16 Dec 2005 08:02:11 +0000
Subject: [PATCH] Less would segfault if it had no tty.  (Bug 600.)

---
 miscutils/less.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/miscutils/less.c b/miscutils/less.c
index 0b0dc0c8b..19051f6f6 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -239,6 +239,7 @@ static void data_readlines(void) {
 
 	if(inp == NULL)
 		inp = (inp_stdin) ? bb_xfopen(CURRENT_TTY, "r") : stdin;
+	if(inp == NULL) bb_perror_msg_and_die("no tty");
 
 	if (flags & FLAG_N)
 		add_linenumbers();