linux-kernel - Re: [PATCH v2] selftests: use printf instead of echo -ne

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Message-ID: <96536043-2afe-c10d-b4ee-9625203c6242@linuxfoundation.org>
Date:   Tue, 7 Feb 2023 14:54:09 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Guillaume Tucker <guillaume.tucker@...labora.com>,
        Shuah Khan <shuah@...nel.org>,
        Gautam <gautammenghani201@...il.com>,
        David Laight <David.Laight@...LAB.COM>
Cc:     kernel@...labora.com, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernelci@...ts.linux.dev,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v2] selftests: use printf instead of echo -ne

On 2/7/23 01:36, Guillaume Tucker wrote:
> On 04/02/2023 14:56, Guillaume Tucker wrote:
>> On some systems, the default echo command doesn't handle the -e option
>> and the output looks like this (arm64 build):
>>
>> -ne Emit Tests for alsa
>>
>> -ne Emit Tests for amd-pstate
>>
>> -ne Emit Tests for arm64
>>
>> This is for example the case with the KernelCI Docker images
>> e.g. kernelci/gcc-10:x86-kselftest-kernelci.  To avoid this issue, use
>> printf which handles escape characters as a standard feature and is
>> more widespread among modern shells.
>>
>> The output is now formatted as expected (x86 build this time):
>>
>> Emit Tests for alsa
>> Emit Tests for amd-pstate
>> Skipping non-existent dir: arm64
>>
>> Reported-by: "kernelci.org bot" <bot@...nelci.org>
>> Suggested-by: David Laight <David.Laight@...LAB.COM>
>> Fixes: 3297a4df805d ("kselftests: Enable the echo command to print newlines in Makefile")
>> Signed-off-by: Guillaume Tucker <guillaume.tucker@...labora.com>
>> ---
>>
>> Notes:
>>      v2: use printf insead of $(which echo)
> 
> Oh I see you've already applied the v1 on kselftest/next branch:
> 
>    79c16b1120fe selftests: find echo binary to use -ne options
> 
> Do you want me to send this printf fix rebased on top?
> 

Yes please. Thank you.

thanks,
--- Shuah