1 /*
2  * Copyright (C) 2020 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 #pragma once
17 
18 #include <json/json.h>
19 #include <optional>
20 
21 #include "common/libs/fs/shared_fd.h"
22 #include "host/commands/kernel_log_monitor/kernel_log_server.h"
23 
24 namespace monitor {
25 
26 struct ReadEventResult {
27   Event event;
28   Json::Value metadata;
29 };
30 
31 // Read a kernel log event from fd.
32 std::optional<ReadEventResult> ReadEvent(cuttlefish::SharedFD fd);
33 
34 // Writes a kernel log event to the fd, in a format expected by ReadEvent.
35 bool WriteEvent(cuttlefish::SharedFD fd, const Json::Value& event_message);
36 
37 }  // namespace monitor
38