linux-kernel - Re: [PATCH v2 1/3] perf test: Pass the verbose option to shell tests

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Message-ID: <YNIhzyKPqfFvvoYs@kernel.org>
Date:   Tue, 22 Jun 2021 14:45:51 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Song Liu <songliubraving@...com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        bpf@...r.kernel.org
Subject: Re: [PATCH v2 1/3] perf test: Pass the verbose option to shell tests

Em Mon, Jun 21, 2021 at 02:56:46PM -0700, Ian Rogers escreveu:
> Having a verbose option will allow shell tests to provide extra failure
> details when the fail or skip.
> 
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> ---
>  tools/perf/tests/builtin-test.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
> index cbbfe48ab802..e1ed60567b2f 100644
> --- a/tools/perf/tests/builtin-test.c
> +++ b/tools/perf/tests/builtin-test.c
> @@ -577,10 +577,13 @@ struct shell_test {
>  static int shell_test__run(struct test *test, int subdir __maybe_unused)
>  {
>  	int err;
> -	char script[PATH_MAX];
> +	char script[PATH_MAX + 3];

This looks strange, i.e. if it is a _path_ _MAX_, why add 3 chars past
that max when generating a _path_? I'll drop the above hunk and keep the
rest, ok?

- Arnaldo

>  	struct shell_test *st = test->priv;
>  
> -	path__join(script, sizeof(script), st->dir, st->file);
> +	path__join(script, sizeof(script) - 3, st->dir, st->file);
> +
> +	if (verbose)
> +		strncat(script, " -v", sizeof(script) - strlen(script) - 1);
>  
>  	err = system(script);
>  	if (!err)