1 /*
2  * Copyright (c) 2021 Huawei Device Co., Ltd.
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 UPDATER_RAW_WRITER_H
17 #define UPDATER_RAW_WRITER_H
18 
19 #include <cstdio>
20 #include <string>
21 #include <sys/types.h>
22 #include <unistd.h>
23 #include "applypatch/data_writer.h"
24 
25 namespace Updater {
26 class RawWriter : public DataWriter {
27 public:
28     bool Write(const uint8_t *addr, size_t len, const void *context) override;
29 
RawWriter(const std::string path,uint64_t offset)30     RawWriter(const std::string path, uint64_t offset) : fd_(-1), path_(path), offset_(offset) {}
RawWriter(const std::string path,uint64_t startAddr,uint64_t offset)31     RawWriter(const std::string path, uint64_t startAddr, uint64_t offset) : fd_(-1),
32         path_(path), offset_(startAddr + offset) {}
33 
~RawWriter()34     virtual ~RawWriter()
35     {
36         offset_ = 0;
37         if (fd_ > 0) {
38             fsync(fd_);
39             close(fd_);
40         }
41         fd_ = -1;
42     }
43 private:
44     int WriteInternal(int fd, const uint8_t *data, size_t len);
45 
46     RawWriter(const RawWriter&) = delete;
47 
48     const RawWriter& operator=(const RawWriter&) = delete;
49     int fd_;
50     std::string path_;
51     off64_t offset_;
52 };
53 } // namespace Updater
54 #endif /* UPDATER_RAW_WRITER_H */
55