From c57daab191c6551ac757576fcf7df45fd9790b6b Mon Sep 17 00:00:00 2001
From: Lennart Poettering <[email protected]>
Date: Tue, 22 Nov 2022 12:56:38 +0100
Subject: [PATCH] utmp-wtmp: fix error in case isatty() fails

(cherry picked from commit 80b780ba178a84b248ecee47eef82358480c9492)

Related: #2172846
---
 src/shared/utmp-wtmp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/shared/utmp-wtmp.c b/src/shared/utmp-wtmp.c
index ef9427fa7b..743b784489 100644
--- a/src/shared/utmp-wtmp.c
+++ b/src/shared/utmp-wtmp.c
@@ -312,8 +312,10 @@ static int write_to_terminal(const char *tty, const char *message) {
         assert(message);
 
         fd = open(tty, O_WRONLY|O_NONBLOCK|O_NOCTTY|O_CLOEXEC);
-        if (fd < 0 || !isatty(fd))
+        if (fd < 0)
                 return -errno;
+        if (!isatty(fd))
+                return -ENOTTY;
 
         p = message;
         left = strlen(message);