1/*
2 * Copyright (c) Huawei Technologies Co., Ltd. 2022. All rights reserved.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#ifndef LIBBPF_LOGGER_H
17#define LIBBPF_LOGGER_H
18
19#include <memory>
20#include <string>
21
22#include <unistd.h>
23#include <fcntl.h>
24
25#include "libbpf.h"
26
27class LIBBPFLogger {
28public:
29    ~LIBBPFLogger()
30    {
31        if (fd_ >= 0) {
32            close(fd_);
33        }
34    }
35
36    static std::unique_ptr<LIBBPFLogger> MakeUnique(const std::string& logFile, int logLevel);
37    int Printf(int logLevel, const char* format, va_list args);
38
39    enum Constants:int {
40        MAX_LIBBPF_LOG_LEN = 1024,
41    };
42
43private:
44    LIBBPFLogger(int logLevel):logLevel_ {logLevel} {}
45    int OpenLogFile(const std::string& logFile);
46    std::string GetLogFileName() const;
47
48    const int logLevel_ {LIBBPF_DEBUG};
49    int fd_ {-1};
50};
51
52#endif