Re: [PATCH net-next v3] selftests: net: add helper for checking if nettest is available

[Hangbin Liu <liuhangbin@gmail.com>]

On Tue, Aug 20, 2024 at 06:22:27PM -0700, Jakub Kicinski wrote:
> A few tests check if nettest exists in the $PATH before adding
> $PWD to $PATH and re-checking. They don't discard stderr on
> the first check (and nettest is built as part of selftests,
> so it's pretty normal for it to not be available in system $PATH).
> This leads to output noise:
> 
>   which: no nettest in (/home/virtme/tools/fs/bin:/home/virtme/tools/fs/sbin:/home/virtme/tools/fs/usr/bin:/home/virtme/tools/fs/usr/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin)
> 
> Add a common helper for the check which does silence stderr.
> 
> There is another small functional change hiding here, because pmtu.sh
> and fib_rule_tests.sh used to return from the test case rather than
> completely exit. Building nettest is not hard, there should be no need
> to maintain the ability to selectively skip cases in its absence.
> 
> Reviewed-by: Ido Schimmel <idosch@nvidia.com>
> Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>