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Date:   Sun, 3 Apr 2022 17:02:48 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Yuntao Wang <ytcoode@...il.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Shuah Khan <shuah@...nel.org>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>
Subject: Re: [PATCH bpf-next] selftests/bpf: Fix cd_flavor_subdir() of test_progs

On Sun, Apr 3, 2022 at 6:53 AM Yuntao Wang <ytcoode@...il.com> wrote:
>
> Currently, when we run test_progs with just executable file name, for
> example 'PATH=. test_progs-no_alu32', cd_flavor_subdir() will not check

First time seeing this PATH=. trick just to avoid
./test_progs-no_alu32, but sure, the fix makes sense. Applied to
bpf-next.

> if test_progs is running as a flavored test runner and switch into
> corresponding sub-directory.
>
> This will cause test_progs-no_alu32 executed by the
> 'PATH=. test_progs-no_alu32' command to run in the wrong directory and
> load the wrong BPF objects.
>
> Signed-off-by: Yuntao Wang <ytcoode@...il.com>
> ---
>  tools/testing/selftests/bpf/test_progs.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c
> index 2ecb73a65206..0a4b45d7b515 100644
> --- a/tools/testing/selftests/bpf/test_progs.c
> +++ b/tools/testing/selftests/bpf/test_progs.c
> @@ -761,8 +761,10 @@ int cd_flavor_subdir(const char *exec_name)
>         const char *flavor = strrchr(exec_name, '/');
>
>         if (!flavor)
> -               return 0;
> -       flavor++;
> +               flavor = exec_name;
> +       else
> +               flavor++;
> +
>         flavor = strrchr(flavor, '-');
>         if (!flavor)
>                 return 0;
> --
> 2.35.1
>

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