1 /*
2 * Copyright 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
17 #include "storage/legacy_config_file.h"
18
19 #include <bluetooth/log.h>
20
21 #include <cerrno>
22 #include <fstream>
23 #include <sstream>
24
25 #include "common/strings.h"
26 #include "os/files.h"
27 #include "os/log.h"
28 #include "storage/device.h"
29
30 namespace bluetooth {
31 namespace storage {
32
LegacyConfigFile(std::string path)33 LegacyConfigFile::LegacyConfigFile(std::string path) : path_(std::move(path)) {
34 log::assert_that(!path_.empty(), "assert failed: !path_.empty()");
35 };
36
Read(size_t temp_devices_capacity)37 std::optional<ConfigCache> LegacyConfigFile::Read(size_t temp_devices_capacity) {
38 log::assert_that(!path_.empty(), "assert failed: !path_.empty()");
39 std::ifstream config_file(path_);
40 if (!config_file || !config_file.is_open()) {
41 log::error("unable to open file '{}', error: {}", path_, strerror(errno));
42 return std::nullopt;
43 }
44 [[maybe_unused]] int line_num = 0;
45 ConfigCache cache(temp_devices_capacity, Device::kLinkKeyProperties);
46 std::string line;
47 std::string section(ConfigCache::kDefaultSectionName);
48 while (std::getline(config_file, line)) {
49 ++line_num;
50 line = common::StringTrim(std::move(line));
51 if (line.empty()) {
52 continue;
53 }
54
55 if (line.front() == '\0' || line.front() == '#') {
56 continue;
57 }
58 if (line.front() == '[') {
59 if (line.back() != ']') {
60 log::warn("unterminated section name on line {}", line_num);
61 return std::nullopt;
62 }
63 // Read 'test' from '[text]', hence -2
64 section = line.substr(1, line.size() - 2);
65 } else {
66 auto tokens = common::StringSplit(line, "=", 2);
67 if (tokens.size() != 2) {
68 log::warn("no key/value separator found on line {}", line_num);
69 return std::nullopt;
70 }
71 tokens[0] = common::StringTrim(std::move(tokens[0]));
72 tokens[1] = common::StringTrim(std::move(tokens[1]));
73 cache.SetProperty(section, tokens[0], std::move(tokens[1]));
74 }
75 }
76 return cache;
77 }
78
Write(const ConfigCache & cache)79 bool LegacyConfigFile::Write(const ConfigCache& cache) {
80 return os::WriteToFile(path_, cache.SerializeToLegacyFormat());
81 }
82
Delete()83 bool LegacyConfigFile::Delete() {
84 if (!os::FileExists(path_)) {
85 log::warn("Config file at \"{}\" does not exist", path_);
86 return false;
87 }
88 return os::RemoveFile(path_);
89 }
90
91 } // namespace storage
92 } // namespace bluetooth
93