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Sat, 07 Mar 2026 14:08:12 -0800 (PST) From: =?utf-8?q?Ricardo_B=2E_Marli=C3=A8re?= Date: Sat, 07 Mar 2026 19:07:58 -0300 Subject: [PATCH 3/9] ktest: Treat undefined self-reference as empty Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260307-ktest-fixes-v1-3-565d412f4925@suse.com> References: <20260307-ktest-fixes-v1-0-565d412f4925@suse.com> In-Reply-To: <20260307-ktest-fixes-v1-0-565d412f4925@suse.com> To: Steven Rostedt , John Hawley Cc: Andrea Righi , Marcos Paulo de Souza , Matthieu Baerts , Fernando Fernandez Mancera , Pedro Falcato , linux-kernel@vger.kernel.org, Steven Rostedt , =?utf-8?q?Ricardo_B=2E_Marli=C3=A8re?= X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openssh-sha256; t=1772921280; l=1242; i=rbm@suse.com; h=from:subject:message-id; bh=XRRVA3NdE35eyTT0PsZWqriSVLCL7lshbx6X6v5riPM=; b=U1NIU0lHAAAAAQAAADMAAAALc3NoLWVkMjU1MTkAAAAgguRCc5X8/UX9M40lkMnr//aFGOhce x5ezt8MFNUFlqYAAAAGcGF0YXR0AAAAAAAAAAZzaGE1MTIAAABTAAAAC3NzaC1lZDI1NTE5AAAA QO1kaxK+PuaIBPZxBTJyztwsZxnLPE/C9ZfP+UxjOSnN7dNbjZJqltj9sSCyO/WUp6/EbeEwyuP hsYTnNaSaQgA= X-Developer-Key: i=rbm@suse.com; a=openssh; fpr=SHA256:pzhe0fJpYLz+3cZ33FFPhIfaUElk9CXPFFXmalIH+1g Config variables are expanded when they are assigned. A first-time append such as: VAR :=3D ${VAR} foo leaves the literal ${VAR} in the stored value because VAR has not been defined yet. Later expansions then carry the self-reference forward instead of behaving like an empty prefix. Drop an unescaped self-reference when the variable has no current value, and trim the outer whitespace left behind. Keep escaped \${VAR} references unchanged so literal text still works. Signed-off-by: Ricardo B. Marli=C3=A8re --- tools/testing/ktest/ktest.pl | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl index b7a1c8c617e0..b8fcdabffffe 100755 --- a/tools/testing/ktest/ktest.pl +++ b/tools/testing/ktest/ktest.pl @@ -910,6 +910,14 @@ sub set_variable { if (defined($command_tmp_vars{$lvalue})) { return; } + + # If a variable is undefined, treat an unescaped self-reference as emp= ty. + if (!defined($variable{$lvalue})) { + $rvalue =3D~ s/(?