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1 /*
2  * Copyright (c) 2022-2023 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 #include "b_ohos/startup/backup_para.h"
17 
18 #include <cstdint>
19 #include <memory>
20 #include <string>
21 #include <tuple>
22 
23 #include "b_error/b_error.h"
24 #include "b_resources/b_constants.h"
25 #include "filemgmt_libhilog.h"
26 #include "parameter.h"
27 
28 namespace OHOS::FileManagement::Backup {
29 using namespace std;
30 
31 /**
32  * @brief 获取配置参数的值
33  *
34  * @param key 配置参数的参数名
35  * @param len 配置参数值的最大长度
36  * @return 成功获取配置参数的值则返回true,失败则返回false;以及表示配置参数值的字符串
37  */
GetConfigParameterValue(const string & key,uint32_t len)38 static tuple<bool, string> GetConfigParameterValue(const string &key, uint32_t len)
39 {
40     int handle = static_cast<int>(FindParameter(key.c_str()));
41     if (handle == -1) {
42         HILOGI("Fail to find parameter.");
43         return {false, ""};
44     }
45     try {
46         unique_ptr<char[]> buffer = make_unique<char[]>(len + 1);
47         int res = GetParameterValue(handle, buffer.get(), len + 1);
48         if (res < 0) {
49             HILOGI("Fail to get parameter value.");
50             return {false, ""};
51         }
52         return {true, buffer.get()};
53     } catch (const bad_alloc &e) {
54         HILOGI("Fail to get parameter value: %{public}s.", e.what());
55         return {false, ""};
56     }
57 }
58 
GetBackupDebugOverrideExtensionConfig()59 bool BackupPara::GetBackupDebugOverrideExtensionConfig()
60 {
61     auto [getCfgParaValSucc, value] = GetConfigParameterValue(BConstants::BACKUP_DEBUG_OVERRIDE_EXTENSION_CONFIG_KEY,
62                                                               BConstants::BACKUP_PARA_VALUE_MAX);
63     if (!getCfgParaValSucc) {
64         throw BError(BError::Codes::SA_INVAL_ARG, "Fail to get configuration parameter value of backup.para");
65     }
66     return value == "true";
67 }
68 
GetBackupOverrideBackupSARelease()69 bool BackupPara::GetBackupOverrideBackupSARelease()
70 {
71     auto [getCfgParaValSucc, value] =
72         GetConfigParameterValue(BConstants::BACKUP_OVERRIDE_BACKUP_SA_RELEASE_KEY, BConstants::BACKUP_PARA_VALUE_MAX);
73     if (!getCfgParaValSucc) {
74         throw BError(BError::Codes::SA_INVAL_ARG, "Fail to get configuration parameter value of backup.para");
75     }
76     return value == "true";
77 }
78 
GetBackupOverrideIncrementalRestore()79 bool BackupPara::GetBackupOverrideIncrementalRestore()
80 {
81     auto [getCfgParaValSucc, value] =
82         GetConfigParameterValue(BConstants::BACKUP_OVERRIDE_INCREMENTAL_KEY, BConstants::BACKUP_PARA_VALUE_MAX);
83     if (!getCfgParaValSucc) {
84         throw BError(BError::Codes::SA_INVAL_ARG, "Fail to get configuration parameter value of backup.para");
85     }
86     return value == "true";
87 }
88 
GetBackupDebugOverrideAccount()89 tuple<bool, int32_t> BackupPara::GetBackupDebugOverrideAccount()
90 {
91     auto [getCfgParaValSucc, value] = GetConfigParameterValue(BConstants::BACKUP_DEBUG_OVERRIDE_ACCOUNT_CONFIG_KEY,
92                                                               BConstants::BACKUP_PARA_VALUE_MAX);
93     if (!getCfgParaValSucc) {
94         return {false, 0};
95     }
96     if (value == "true") {
97         auto [getCfgParaValSucc, value] = GetConfigParameterValue(BConstants::BACKUP_DEBUG_OVERRIDE_ACCOUNT_NUMBER_KEY,
98                                                                   BConstants::BACKUP_PARA_VALUE_MAX);
99         if (!getCfgParaValSucc) {
100             return {false, 0};
101         }
102         return {true, stoi(value)};
103     }
104     return {false, 0};
105 }
106 } // namespace OHOS::FileManagement::Backup