1 /*
2 * Copyright (c) 2025 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 #include "common_utils.h"
16
17 #include <cinttypes>
18 #include <sys/stat.h>
19 #include <unistd.h>
20
21 #include "securec.h"
22 #include "sensors_errors.h"
23
24 #undef LOG_TAG
25 #define LOG_TAG "CommonUtils"
26
27 namespace OHOS {
28 namespace Sensors {
29 namespace {
30 const std::string CONFIG_DIR = "/data/test/vibrator/";
31 constexpr int32_t FILE_SIZE_MAX = 0x5000;
32 constexpr int32_t INVALID_FILE_SIZE = -1;
33 constexpr int32_t FILE_PATH_MAX = 1024;
34 } // namespace
35
CheckFilePath(const std::string & filePath)36 bool CheckFilePath(const std::string &filePath)
37 {
38 if (filePath.empty()) {
39 MISC_HILOGE("Path is empty");
40 return false;
41 }
42 char realPath[PATH_MAX] = {};
43 if (realpath(filePath.c_str(), realPath) == nullptr) {
44 MISC_HILOGE("Path is error, %{public}d", errno);
45 return false;
46 }
47 if (!CheckFileDir(realPath, CONFIG_DIR)) {
48 MISC_HILOGE("File dir is invalid");
49 return false;
50 }
51 if (!CheckFileExtendName(realPath, "json")) {
52 MISC_HILOGE("Unable to parse files other than json format");
53 return false;
54 }
55 if (!IsFileExists(realPath)) {
56 MISC_HILOGE("File not exist");
57 return false;
58 }
59 if (!CheckFileSize(realPath)) {
60 MISC_HILOGE("File size out of read range");
61 return false;
62 }
63 return true;
64 }
65
GetFileSize(const std::string & filePath)66 int32_t GetFileSize(const std::string &filePath)
67 {
68 struct stat statbuf = { 0 };
69 if (stat(filePath.c_str(), &statbuf) != 0) {
70 MISC_HILOGE("Get file size error");
71 return INVALID_FILE_SIZE;
72 }
73 return statbuf.st_size;
74 }
75
GetFileSize(int32_t fd)76 int64_t GetFileSize(int32_t fd)
77 {
78 if (fd < 0) {
79 MISC_HILOGE("fd is invalid, fd:%{public}d", fd);
80 return INVALID_FILE_SIZE;
81 }
82 struct stat64 statbuf = { 0 };
83 if (fstat64(fd, &statbuf) != 0) {
84 MISC_HILOGE("fstat error, errno:%{public}d", errno);
85 return INVALID_FILE_SIZE;
86 }
87 return statbuf.st_size;
88 }
89
GetFileName(const int32_t & fd,std::string & fileName)90 int32_t GetFileName(const int32_t &fd, std::string &fileName)
91 {
92 if (fd < 0) {
93 MISC_HILOGE("fd is invalid, fd:%{public}d", fd);
94 return ERROR;
95 }
96 char buf[FILE_PATH_MAX] = {'\0'};
97 char filePath[FILE_PATH_MAX] = {'\0'};
98
99 int ret = snprintf_s(buf, sizeof(buf), (sizeof(buf) - 1), "/proc/self/fd/%d", fd);
100 if (ret < 0) {
101 MISC_HILOGE("snprintf failed with %{public}d", errno);
102 return ERROR;
103 }
104
105 ret = readlink(buf, filePath, FILE_PATH_MAX);
106 if (ret < 0 || ret >= FILE_PATH_MAX) {
107 MISC_HILOGE("readlink failed with %{public}d", errno);
108 return ERROR;
109 }
110
111 fileName = filePath;
112 std::size_t firstSlash = fileName.rfind("/");
113 if (firstSlash == fileName.npos) {
114 MISC_HILOGE("Get error path");
115 return ERROR;
116 }
117 fileName = fileName.substr(firstSlash + 1, fileName.size() - firstSlash);
118 return SUCCESS;
119 }
120
GetFileExtName(const int32_t & fd,std::string & extName)121 int32_t GetFileExtName(const int32_t &fd, std::string &extName)
122 {
123 if (fd < 0) {
124 MISC_HILOGE("fd is invalid, fd:%{public}d", fd);
125 return ERROR;
126 }
127 std::string fileName = "";
128 if (GetFileName(fd, fileName) == ERROR) {
129 MISC_HILOGE("GetFileName failed");
130 return ERROR;
131 }
132 extName = fileName.substr(fileName.find_last_of(".") + 1);
133 return SUCCESS;
134 }
135
CheckFileDir(const std::string & filePath,const std::string & dir)136 bool CheckFileDir(const std::string &filePath, const std::string &dir)
137 {
138 if (filePath.compare(0, CONFIG_DIR.size(), CONFIG_DIR) != 0) {
139 MISC_HILOGE("filePath dir is invalid");
140 return false;
141 }
142 return true;
143 }
144
CheckFileSize(const std::string & filePath)145 bool CheckFileSize(const std::string &filePath)
146 {
147 int32_t fileSize = GetFileSize(filePath);
148 if ((fileSize <= 0) || (fileSize > FILE_SIZE_MAX)) {
149 MISC_HILOGE("File size out of read range");
150 }
151 return true;
152 }
153
CheckFileExtendName(const std::string & filePath,const std::string & checkExtension)154 bool CheckFileExtendName(const std::string &filePath, const std::string &checkExtension)
155 {
156 std::string::size_type pos = filePath.find_last_of('.');
157 if (pos == std::string::npos) {
158 MISC_HILOGE("File is not find extension");
159 return false;
160 }
161 return (filePath.substr(pos + 1, filePath.npos) == checkExtension);
162 }
163
IsFileExists(const std::string & fileName)164 bool IsFileExists(const std::string &fileName)
165 {
166 return (access(fileName.c_str(), F_OK) == 0);
167 }
168 } // namespace Sensors
169 } // namespace OHOS
170