From: DaanDeMeyer <daan.j.demeyer@gmail.com>
Date: Mon, 25 Aug 2025 19:55:00 +0000 (+0200)
Subject: box: Only use systemd-pty-forward if stdout is connected to tty
X-Git-Tag: v26~137^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f53c6dd98d54c95424f1d56c4e66752ee94f6375;p=thirdparty%2Fmkosi.git

box: Only use systemd-pty-forward if stdout is connected to tty

Otherwise piping mkosi box output to less will hang on exit.
---

diff --git a/mkosi/__init__.py b/mkosi/__init__.py
index e760e9285..d66369956 100644
--- a/mkosi/__init__.py
+++ b/mkosi/__init__.py
@@ -4195,7 +4195,7 @@ def run_box(args: Args, config: Config) -> None:
 
     cmdline = [*args.cmdline]
 
-    if sys.stdin.isatty() and config.find_binary("systemd-pty-forward"):
+    if sys.stdin.isatty() and sys.stdout.isatty() and config.find_binary("systemd-pty-forward"):
         cmdline = [
             "systemd-pty-forward",
             "--title=mkosi-sandbox",