[Devel] [PATCH vz10 3/6] selftests: net: forwarding: add run_cmd_grep helper for feature probing

[Konstantin Khorenko]

On 12/22/25 20:48, Aleksei Oladko wrote:
> In some forwarding tests, it is necessary to check for features or
> specific keywords in command output before proceeding.
> 
> Introduce the run_cmd_grep helper in lib.sh. This helper executes a
> command and searches for a specific pattern in its output.
> 
> https://virtuozzo.atlassian.net/browse/VSTOR-121418
> 
> Signed-off-by: Aleksei Oladko <aleksey.oladko at virtuozzo.com>
> ---
>   tools/testing/selftests/net/forwarding/lib.sh | 20 +++++++++++++++++++
>   1 file changed, 20 insertions(+)
> 
> diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
> index 7f22496bfdf9..36fadf71fcd8 100644
> --- a/tools/testing/selftests/net/forwarding/lib.sh
> +++ b/tools/testing/selftests/net/forwarding/lib.sh
> @@ -2314,3 +2314,23 @@ has_unicast_flt()
>   
>   	[[ $promisc == 1 ]] && echo "no" || echo "yes"
>   }
> +
> +run_cmd_grep_common()
> +{
> +	local find="$1"; shift
> +	local cmd="$*"
> +	local out
redundant var

> +		echo "COMMAND: ${cmd} 2>&1 | grep -q '${find}'"

redundant line?

> +	if [ "$VERBOSE" = "1" ]; then
> +		echo "COMMAND: ${cmd} 2>&1 | grep -q '${find}'"
> +	fi
> +	out=$($cmd 2>&1 | grep -q "${find}" 2>&1)

"out" is not used (and "grep -q" won't print anything anyway), to be dropped?

> +	return $?
> +}
> +
> +run_cmd_grep() {
> +	run_cmd_grep_common "$@"
> +	rc=$?
> +	check_err $rc
> +	return $rc
> +}