From: Daan De Meyer <daan.j.demeyer@gmail.com>
Date: Mon, 24 Apr 2023 13:10:07 +0000 (+0200)
Subject: Use stderr to check for tty in foreground()
X-Git-Tag: v15~204^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8dcc57ddcb81d6dc215ba367b284bf35f0743a4f;p=thirdparty%2Fmkosi.git

Use stderr to check for tty in foreground()

stdin/stdout might be redirected for other purposes, let's use stderr
instead to detect if we're connected to a terminal.
---

diff --git a/mkosi/run.py b/mkosi/run.py
index e9dc20262..80328fff5 100644
--- a/mkosi/run.py
+++ b/mkosi/run.py
@@ -131,10 +131,11 @@ def foreground() -> None:
     If we're connected to a terminal, put the process in a new process group and make that the foreground
     process group so that only this process receives SIGINT.
     """
-    if sys.stdin.isatty():
+    STDERR_FILENO = 2
+    if os.isatty(STDERR_FILENO):
         os.setpgrp()
         old = signal.signal(signal.SIGTTOU, signal.SIG_IGN)
-        os.tcsetpgrp(0, os.getpgrp())
+        os.tcsetpgrp(STDERR_FILENO, os.getpgrp())
         signal.signal(signal.SIGTTOU, old)