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

[Aleksei Oladko]

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
+		echo "COMMAND: ${cmd} 2>&1 | grep -q '${find}'"
+	if [ "$VERBOSE" = "1" ]; then
+		echo "COMMAND: ${cmd} 2>&1 | grep -q '${find}'"
+	fi
+	out=$($cmd 2>&1 | grep -q "${find}" 2>&1)
+	return $?
+}
+
+run_cmd_grep() {
+	run_cmd_grep_common "$@"
+	rc=$?
+	check_err $rc
+	return $rc
+}
-- 
2.43.0