From: Pádraig Brady <P@draigBrady.com>
Date: Wed, 1 Apr 2026 12:23:54 +0000 (+0100)
Subject: tests: dd: avoid false failure with no controlling terminal
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=178c48154d87e580cb421d8acc5605e6bb4aa56c;p=thirdparty%2Fcoreutils.git

tests: dd: avoid false failure with no controlling terminal

* tests/dd/misc.sh: test -w /dev/tty is not a strong enough check,
we need to actually open /dev/tty to ensure it's available.
It's not available under setsid for example.
---

diff --git a/tests/dd/misc.sh b/tests/dd/misc.sh
index e6559bf168..aa776b1379 100755
--- a/tests/dd/misc.sh
+++ b/tests/dd/misc.sh
@@ -125,7 +125,7 @@ compare /dev/null $tmp_out || fail=1
 compare err_ok err || fail=1
 
 # Ensure of=/dev/tty is possible
-if test -c /dev/tty && test -w /dev/tty; then
+if test -c /dev/tty && >/dev/tty; then
   dd if=/dev/null of=/dev/tty || fail=1
 fi