On Sat, Nov 29, 2025 at 12:24:19PM +0000, Andre Carvalho wrote:

This removes some noise that can be distracting while looking at selftests by redirecting socat stderr to /dev/null.

Before this commit, netcons_basic would output:

Running with target mode: basic (ipv6) 2025/11/29 12:08:03 socat[259] W exiting on signal 15 2025/11/29 12:08:03 socat[271] W exiting on signal 15 basic : ipv6 : Test passed Running with target mode: basic (ipv4) 2025/11/29 12:08:05 socat[329] W exiting on signal 15 2025/11/29 12:08:05 socat[322] W exiting on signal 15 basic : ipv4 : Test passed Running with target mode: extended (ipv6) 2025/11/29 12:08:08 socat[386] W exiting on signal 15 2025/11/29 12:08:08 socat[386] W exiting on signal 15 2025/11/29 12:08:08 socat[380] W exiting on signal 15 extended : ipv6 : Test passed Running with target mode: extended (ipv4) 2025/11/29 12:08:10 socat[440] W exiting on signal 15 2025/11/29 12:08:10 socat[435] W exiting on signal 15 2025/11/29 12:08:10 socat[435] W exiting on signal 15 extended : ipv4 : Test passed

After these changes, output looks like:

Running with target mode: basic (ipv6) basic : ipv6 : Test passed Running with target mode: basic (ipv4) basic : ipv4 : Test passed Running with target mode: extended (ipv6) extended : ipv6 : Test passed Running with target mode: extended (ipv4) extended : ipv4 : Test passed

Signed-off-by: Andre Carvalho asantostc@gmail.com

tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh b/tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh index 87f89fd92f8c..ae8abff4be40 100644 --- a/tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh +++ b/tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh @@ -249,7 +249,7 @@ function listen_port_and_save_to() { # Just wait for 2 seconds timeout 2 ip netns exec "${NAMESPACE}" \

• socat "${SOCAT_MODE}":"${PORT}",fork "${OUTPUT}"
  

• socat "${SOCAT_MODE}":"${PORT}",fork "${OUTPUT}" 2> /dev/null
  

} # Only validate that the message arrived properly

I'm always concerned that a blanket redirect might hide some corner cases in the future. But I do agree that this addresses the issue at hand. And probably I'm over-thinking things here.

Reviewed-by: Simon Horman horms@kernel.org