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 #include <unistd.h>
16 #include <sys/stat.h>
17 #include "util/file_utils.h"
18 using namespace std;
19 namespace OHOS {
20 namespace HiviewDFX {
FileUtils()21 FileUtils::FileUtils()
22 {
23 }
~FileUtils()24 FileUtils::~FileUtils()
25 {
26 }
27
CreateFolder(const string & path)28 bool FileUtils::CreateFolder(const string &path)
29 {
30 if (!access(path.c_str(), F_OK) || path == "") {
31 return true;
32 }
33
34 size_t pos = path.rfind("/");
35 if (pos == string::npos) {
36 return false;
37 }
38
39 string upperPath = path.substr(0, pos);
40 if (CreateFolder(upperPath)) {
41 if (mkdir(path.c_str(), S_IRWXU | S_IRWXG | S_IRWXO)) {
42 if (errno != EEXIST) {
43 return false;
44 }
45 }
46 return true;
47 }
48 return false;
49 }
50
LoadStringFromProcCb(const std::string & path,bool oneLine,bool endWithoutN,const DataHandler & func)51 bool FileUtils::LoadStringFromProcCb(const std::string& path, bool oneLine, bool endWithoutN, const DataHandler& func)
52 {
53 char canonicalPath[PATH_MAX] = {0};
54 if (realpath(path.c_str(), canonicalPath) == nullptr) {
55 return false;
56 }
57 auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(canonicalPath, "re"), fclose};
58 if (fp == nullptr) {
59 return false;
60 }
61 char *lineBuf = nullptr;
62 ssize_t lineLen;
63 size_t lineAlloc = 0;
64 while ((lineLen = getline(&lineBuf, &lineAlloc, fp.get())) > 0) {
65 lineBuf[lineLen] = '\0';
66 if (endWithoutN && lineBuf[lineLen-1] == '\n') {
67 lineBuf[lineLen-1] = '\0';
68 }
69 const string content = lineBuf;
70 func(content);
71 if (oneLine) {
72 break;
73 }
74 }
75 if (lineBuf != nullptr) {
76 free(lineBuf);
77 lineBuf = nullptr;
78 }
79 return true;
80 }
81
82 } // namespace HiviewDFX
83 } // namespace OHOS