From 0f13392851f3bb5e9e091f2f34b0315aaed67ac8 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 13 Feb 2018 23:55:58 +0100
Subject: [PATCH] ask-password: don't use ttyfd if it is not set

---
 src/shared/ask-password-api.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/shared/ask-password-api.c b/src/shared/ask-password-api.c
index 99d6a9b143..25cd9eee7f 100644
--- a/src/shared/ask-password-api.c
+++ b/src/shared/ask-password-api.c
@@ -373,7 +373,8 @@ int ask_password_tty(
                                 loop_write(ttyfd, "(no echo) ", 10, false);
                 } else {
                         if (p >= sizeof(passphrase)-1) {
-                                loop_write(ttyfd, "\a", 1, false);
+                                if (ttyfd >= 0)
+                                        loop_write(ttyfd, "\a", 1, false);
                                 continue;
                         }