netdev - Re: [PATCH bpf] selftests/bpf: use bash instead of sh in test_xdp

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Message-ID: <b186bc7e-2b0b-58b8-065e-c77255b6aecb@infradead.org>
Date:   Fri, 5 Feb 2021 09:39:12 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     William Tu <u9012063@...il.com>,
        Björn Töpel <bjorn.topel@...il.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>,
        Björn Töpel <bjorn.topel@...el.com>
Subject: Re: [PATCH bpf] selftests/bpf: use bash instead of sh in
 test_xdp_redirect.sh

On 2/5/21 9:30 AM, William Tu wrote:
> On Fri, Feb 5, 2021 at 9:09 AM Björn Töpel <bjorn.topel@...il.com> wrote:
>>
>> From: Björn Töpel <bjorn.topel@...el.com>
>>
>> The test_xdp_redirect.sh script uses some bash-features, such as
>> '&>'. On systems that use dash as the sh implementation this will not
>> work as intended. Change the shebang to use bash instead.

Hi,
In general we (kernel, maybe not bpf) try to move away from bash to a more
"standard" sh shell, so things like "&>" would be converted to ">file 2>&1"
or whatever is needed.

>> Also remove the 'set -e' since the script actually relies on that the
>> return value can be used to determine pass/fail of the test.
>>
>> Fixes: 996139e801fd ("selftests: bpf: add a test for XDP redirect")
>> Signed-off-by: Björn Töpel <bjorn.topel@...el.com>
>> ---
> LGTM, thanks.
> Acked-by: William Tu <u9012063@...il.com>
> 


-- 
~Randy