1 /*
2 * Copyright (c) 2021-2024 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 "utils/string_utils.h"
17 #include "utils/file_utils.h"
18 #include <fcntl.h>
19 #include <unistd.h>
20
21 #include "securec.h"
22 #include "storage_service_log.h"
23
24 using namespace std;
25
26 namespace OHOS {
27 namespace StorageDaemon {
28 static constexpr int32_t BUFF_SIZE = 1024;
StringPrintf(const char * format,...)29 std::string StringPrintf(const char *format, ...)
30 {
31 va_list ap;
32 va_list apBackup;
33 va_start(ap, format);
34 va_copy(apBackup, ap);
35 char buf[BUFF_SIZE] = {0};
36 std::string result;
37
38 int count = vsnprintf_s(buf, sizeof(buf), sizeof(buf), format, apBackup);
39 if (count < 0) {
40 LOGE("vsnprintf_s error, errno %{public}d", errno);
41 } else if (count < BUFF_SIZE) {
42 result.append(buf, count);
43 } else {
44 LOGI("allocate larger buffer, len = %{public}d", count + 1);
45
46 char *newBuf = new char[count + 1];
47 if (newBuf != nullptr) {
48 count = vsnprintf_s(newBuf, count + 1, count + 1, format, ap);
49 if (count >= 0) {
50 result.append(newBuf, count);
51 }
52 }
53
54 delete[] newBuf;
55 }
56
57 va_end(apBackup);
58 va_end(ap);
59
60 return result;
61 }
62
SplitLine(std::string & line,std::string & token)63 std::vector<std::string> SplitLine(std::string &line, std::string &token)
64 {
65 std::vector<std::string> result;
66 std::string::size_type start;
67 std::string::size_type end;
68
69 start = 0;
70 end = line.find(token);
71 while (std::string::npos != end) {
72 result.push_back(line.substr(start, end - start));
73 start = end + token.size();
74 end = line.find(token, start);
75 }
76
77 if (start != line.length()) {
78 result.push_back(line.substr(start));
79 }
80
81 return result;
82 }
83
WriteFileSync(const char * path,const uint8_t * data,size_t size,std::string & errMsg)84 bool WriteFileSync(const char *path, const uint8_t *data, size_t size, std::string &errMsg)
85 {
86 FILE *f = fopen(path, "w");
87 if (f == nullptr) {
88 errMsg = "f == nullptr, errno" + std::to_string(errno);
89 LOGE("open %{public}s failed, errno %{public}d", path, errno);
90 return false;
91 }
92 ChMod(path, S_IRUSR | S_IWUSR);
93 int fd = fileno(f);
94 if (fd == -1) {
95 errMsg = "fd == -1, errno" + std::to_string(errno);
96 LOGE("open %{public}s failed, errno %{public}d", path, errno);
97 (void)fclose(f);
98 return false;
99 }
100
101 long len = write(fd, data, size);
102 if (len < 0) {
103 errMsg = "fd == -1, errno" + std::to_string(errno);
104 LOGE("write %{public}s failed, errno %{public}d", path, errno);
105 (void)fclose(f);
106 return false;
107 }
108 if (static_cast<size_t>(len) != size) {
109 errMsg = "len != size, errno" + std::to_string(errno);
110 LOGE("write return len %{public}ld, not equal to content length %{public}zu", len, size);
111 (void)fclose(f);
112 return false;
113 }
114
115 if (fsync(fd) != 0) {
116 errMsg = "fsync(fd), errno" + std::to_string(errno);
117 LOGE("fsync %{public}s failed, errno %{public}d", path, errno);
118 (void)fclose(f);
119 return false;
120 }
121 (void)fclose(f);
122 return true;
123 }
124
SaveStringToFileSync(const std::string & path,const std::string & data,std::string & errMsg)125 bool SaveStringToFileSync(const std::string &path, const std::string &data, std::string &errMsg)
126 {
127 if (path.empty() || data.empty()) {
128 return false;
129 }
130 LOGI("enter %{public}s, size=%{public}zu", path.c_str(), data.length());
131 return WriteFileSync(path.c_str(), reinterpret_cast<const uint8_t *>(data.c_str()), data.size(), errMsg);
132 }
133
StringIsNumber(const std::string & content)134 bool StringIsNumber(const std::string &content)
135 {
136 if (content.empty()) {
137 return false;
138 }
139 bool isNum = true;
140 for (char c : content) {
141 if (!isdigit(c)) {
142 isNum = false;
143 break;
144 }
145 }
146 return isNum;
147 }
148
IsStringExist(const std::list<std::string> & strList,const std::string & content)149 bool IsStringExist(const std::list<std::string> &strList, const std::string &content)
150 {
151 auto it = std::find(strList.begin(), strList.end(), content);
152 return it != strList.end();
153 }
154
ListToString(const std::list<std::string> & strList)155 std::string ListToString(const std::list<std::string> &strList)
156 {
157 if (strList.empty()) {
158 return "";
159 }
160 std::string result;
161 for (auto &iter : strList) {
162 result += iter + ",";
163 }
164 return result.empty() ? "" : result.substr(0, result.length() -1);
165 }
166 } // namespace StorageDaemon
167 } // namespace OHOS
168