#!/bin/sh # SPDX-License-Identifier: GPL-2.0 # description: trace_pipe and trace_marker # flags: instance [ ! -f trace_marker ] && exit_unsupported echo "test input 1" > trace_marker : "trace interface never consume the ring buffer" grep -q "test input 1" trace grep -q "test input 1" trace : "trace interface never consume the ring buffer" head -n 1 trace_pipe | grep -q "test input 1" ! grep -q "test input 1" trace |