Re: [PATCH] selftests: rtnetlink: add checks for ifconfig and iproute2

[Hangbin Liu <liuhangbin@gmail.com>]

On Thu, Aug 21, 2025 at 09:43:11AM +0200, Alessandro Ratti wrote:
> On systems where `ifconfig` is not available (e.g., modern Debian), the
> `kci_test_promote_secondaries` test fails. Wrap the call in a check.
> 
> Additionally, `do_test_address_proto` fails on iproute2 versions that
> lack support for `proto` in `ip address` commands. Add a minimal feature
> check and skip the test with a proper message if unsupported.
> 
> These changes allow the tests to run and report SKIP instead of FAIL on
> platforms with older tools.
> 
> Signed-off-by: Alessandro Ratti <alessandro@0x65c.net>
> ---
>  tools/testing/selftests/net/rtnetlink.sh | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/net/rtnetlink.sh b/tools/testing/selftests/net/rtnetlink.sh
> index d6c00efeb664..9bff620ef595 100755
> --- a/tools/testing/selftests/net/rtnetlink.sh
> +++ b/tools/testing/selftests/net/rtnetlink.sh
> @@ -330,7 +330,9 @@ kci_test_promote_secondaries()
>  	for i in $(seq 2 254);do
>  		IP="10.23.11.$i"
>  		ip -f inet addr add $IP/16 brd + dev "$devdummy"
> -		ifconfig "$devdummy" $IP netmask 255.255.0.0
> +		if command -v ifconfig >/dev/null 2>&1; then
> +			ifconfig "$devdummy" $IP netmask 255.255.0.0
> +		fi

Maybe just skip the promote_secondaries test if ifconfig is not available?

Hangbin
>  	done
>  
>  	ip addr flush dev "$devdummy"
> @@ -1201,6 +1203,12 @@ do_test_address_proto()
>  	local ret=0
>  	local err
>  
> +	run_cmd_grep 'proto' ip address help
> +	if [ $? -ne 0 ];then
> +		end_test "SKIP: addr proto ${what}: iproute2 too old"
> +		return $ksft_skip
> +	fi
> +
>  	ip address add dev "$devdummy" "$addr3"
>  	check_err $?
>  	proto=$(address_get_proto "$addr3")
> -- 
> 2.39.5
>