From d3450d02c7c1b9c4f304b943a5b79c475909b328 Mon Sep 17 00:00:00 2001
From: Edward Tomasz Napierala <trasz@FreeBSD.org>
Date: Mon, 15 Oct 2018 19:48:36 +0000
Subject: [PATCH] Prevent flex(1) from generating calls to isatty(3) - and, in
 turn, TIOCGETA ioctls - when parsing nsswitch.conf(5).

Reviewed by:	imp, markj
Approved by:	re (gjb)
MFC after:	2 weeks
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D17564
---
 lib/libc/net/nslexer.l | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/libc/net/nslexer.l b/lib/libc/net/nslexer.l
index 17cfef8af7a2..946aace3a8a8 100644
--- a/lib/libc/net/nslexer.l
+++ b/lib/libc/net/nslexer.l
@@ -50,6 +50,7 @@ static char *rcsid =
 
 %}
 
+%option never-interactive
 %option noinput
 %option nounput
 %option yylineno