From cd83fb94c6cd75d06fc3b61b506d524dc4ccc152 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@sury.org>
Date: Sun, 4 Nov 2018 02:20:41 +0700
Subject: [PATCH] Enable IDN processing (both idnin and idnout) only on tty,
 disable it when the stdout is not a tty

(cherry picked from commit 0e1bf7d017e4f6d787cbeb72cc2aa74e7f30122e)
---
 bin/dig/dighost.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/bin/dig/dighost.c b/bin/dig/dighost.c
index 6d2fe1f558..ac493e2cd7 100644
--- a/bin/dig/dighost.c
+++ b/bin/dig/dighost.c
@@ -664,12 +664,12 @@ make_empty_lookup(void) {
 	looknew->ttlunits = false;
 	looknew->qr = false;
 #ifdef WITH_IDN_SUPPORT
-	looknew->idnin = true;
+	looknew->idnin = isatty(1)?(getenv("IDN_DISABLE") == NULL):false;
 #else
 	looknew->idnin = false;
 #endif
 #ifdef WITH_IDN_OUT_SUPPORT
-	looknew->idnout = true;
+	looknew->idnout = looknew->idnin;
 #else
 	looknew->idnout = false;
 #endif