[for-next][PATCH 5/9] ktest: Run commands through list-form shell open

[Steven Rostedt]

From: =?UTF-8?q?Ricardo=20B=2E=20Marli=C3=A8re?= <rbm@xxxxxxxx>

run_command() currently uses string-form open():

  open(CMD, "$command 2>&1 |")

That delegates parsing to the shell but also mixes the stderr redirection
into the command string. Switch to list-form open() with an explicit sh -c
wrapper so shell syntax errors are captured in the same output stream as
command output. Otherwise, important errors can not be retrieved from the
ktest LOG_FILE.

Cc: John Hawley <warthog9@xxxxxxxxxxxxxx>
Cc: Andrea Righi <arighi@xxxxxxxxxx>
Cc: Marcos Paulo de Souza <mpdesouza@xxxxxxxx>
Cc: Matthieu Baerts <matttbe@xxxxxxxxxx>
Cc: Fernando Fernandez Mancera <fmancera@xxxxxxx>
Cc: Pedro Falcato <pfalcato@xxxxxxx>
Link: https://patch.msgid.link/20260307-ktest-fixes-v1-5-565d412f4925@xxxxxxxx
Signed-off-by: Ricardo B. Marlière <rbm@xxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 tools/testing/ktest/ktest.pl | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl
index 42bc505e14cb..9d6f50045dbd 100755
--- a/tools/testing/ktest/ktest.pl
+++ b/tools/testing/ktest/ktest.pl
@@ -1921,7 +1921,10 @@ sub run_command {
     doprint("$command ... ");
     $start_time = time;
 
-    $pid = open(CMD, "$command 2>&1 |") or
+    $pid = open(CMD, "-|",
+		"sh", "-c",
+		'command=$1; shift; exec 2>&1; eval "$command"',
+		"sh", $command) or
 	(fail "unable to exec $command" and return 0);
 
     if (defined($opt{"LOG_FILE"})) {
-- 
2.51.0