1 /*
2 * Copyright (c) 2021-2025 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
16 #include "open.h"
17
18 #include <cstring>
19 #include <fcntl.h>
20 #include <tuple>
21 #include <unistd.h>
22
23 #include "common_func.h"
24 #include "n_async/n_async_work_callback.h"
25 #include "n_async/n_async_work_promise.h"
26 #include "n_func_arg.h"
27 #include "remote_uri.h"
28
29 namespace OHOS {
30 namespace DistributedFS {
31 namespace ModuleFileIO {
32 using namespace std;
33
Sync(napi_env env,napi_callback_info info)34 napi_value Open::Sync(napi_env env, napi_callback_info info)
35 {
36 NFuncArg funcArg(env, info);
37 if (!funcArg.InitArgs(NARG_CNT::ONE, NARG_CNT::THREE)) {
38 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
39 return nullptr;
40 }
41
42 bool succ = false;
43 unique_ptr<char[]> path = nullptr;
44 tie(succ, path, ignore) = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8StringPath();
45 if (!succ) {
46 UniError(EINVAL).ThrowErr(env, "Invalid path");
47 return nullptr;
48 }
49
50 unsigned int flags = O_RDONLY;
51 if (funcArg.GetArgc() >= NARG_CNT::TWO) {
52 auto [succGetFlags, authFlags] = NVal(env, funcArg[NARG_POS::SECOND]).ToInt32(O_RDONLY);
53 if (!succGetFlags || authFlags < 0) {
54 UniError(EINVAL).ThrowErr(env, "Invalid flags");
55 return nullptr;
56 }
57 flags = static_cast<unsigned int>(authFlags);
58 (void)CommonFunc::ConvertJsFlags(flags);
59 }
60
61 int fd = -1;
62 if (ModuleRemoteUri::RemoteUri::IsRemoteUri(path.get(), fd, flags)) {
63 return NVal::CreateInt64(env, fd).val_;
64 }
65
66 int32_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
67 if (funcArg.GetArgc() != NARG_CNT::THREE) {
68 size_t flagsFirst { flags };
69 if ((flagsFirst & O_CREAT) || (flagsFirst & O_TMPFILE)) {
70 UniError(EINVAL).ThrowErr(env, "called with O_CREAT/O_TMPFILE but no mode");
71 return nullptr;
72 }
73 } else {
74 tie(succ, mode) = NVal(env, funcArg.GetArg(NARG_POS::THIRD)).ToInt32(mode);
75 if (!succ) {
76 UniError(EINVAL).ThrowErr(env, "Invalid mode");
77 return nullptr;
78 }
79 }
80 fd = open(path.get(), flags, mode);
81 if (fd == -1) {
82 if (errno == ENAMETOOLONG) {
83 UniError(errno).ThrowErr(env, "Filename too long");
84 return nullptr;
85 }
86 UniError(errno).ThrowErr(env);
87 return nullptr;
88 }
89
90 return NVal::CreateInt64(env, fd).val_;
91 }
92
DoOpenExec(const std::string & path,const unsigned int flags,const int32_t mode,shared_ptr<int32_t> arg)93 static UniError DoOpenExec(const std::string& path, const unsigned int flags, const int32_t mode,
94 shared_ptr<int32_t> arg)
95 {
96 int fd = -1;
97 if (!ModuleRemoteUri::RemoteUri::IsRemoteUri(path, fd, flags)) {
98 fd = open(path.c_str(), flags, mode);
99 }
100 *arg = fd;
101 if (fd == -1) {
102 return UniError(errno);
103 } else {
104 return UniError(ERRNO_NOERR);
105 }
106 }
107
ParseFlags(napi_env env,const NFuncArg & funcArg,unsigned int & flags)108 static bool ParseFlags(napi_env env, const NFuncArg& funcArg, unsigned int& flags)
109 {
110 auto [succ, authFlags] = NVal(env, funcArg[NARG_POS::SECOND]).ToInt32(O_RDONLY);
111 if (!succ || authFlags < 0) {
112 UniError(EINVAL).ThrowErr(env, "Invalid flags");
113 return false;
114 }
115 flags = static_cast<unsigned int>(authFlags);
116 (void)CommonFunc::ConvertJsFlags(flags);
117 return true;
118 }
119
Async(napi_env env,napi_callback_info info)120 napi_value Open::Async(napi_env env, napi_callback_info info)
121 {
122 NFuncArg funcArg(env, info);
123 if (!funcArg.InitArgs(NARG_CNT::ONE, NARG_CNT::FOUR)) {
124 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
125 return nullptr;
126 }
127 auto [succ, path, unuse] = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8StringPath();
128 if (!succ) {
129 UniError(EINVAL).ThrowErr(env, "Invalid path");
130 return nullptr;
131 }
132 size_t argc = funcArg.GetArgc();
133 unsigned int flags = O_RDONLY;
134 if (argc >= NARG_CNT::TWO) {
135 if (!ParseFlags(env, funcArg, flags)) {
136 return nullptr;
137 }
138 }
139 int32_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
140 if (argc >= NARG_CNT::THREE) {
141 tie(succ, mode) = NVal(env, funcArg[NARG_POS::THIRD]).ToInt32(mode);
142 if (!succ) {
143 UniError(EINVAL).ThrowErr(env, "Invalid mode");
144 return nullptr;
145 }
146 }
147 auto arg = make_shared<int32_t>();
148 auto cbExec = [path = string(path.get()), flags, mode, arg](napi_env env) -> UniError {
149 return DoOpenExec(path, flags, mode, arg);
150 };
151 auto cbComplCallback = [arg](napi_env env, UniError err) -> NVal {
152 if (err) {
153 if (err.GetErrno(ERR_CODE_SYSTEM_POSIX) == ENAMETOOLONG) {
154 return {env, err.GetNapiErr(env, "Filename too long")};
155 }
156 return { env, err.GetNapiErr(env) };
157 }
158 return { NVal::CreateInt64(env, *arg) };
159 };
160 NVal thisVar(env, funcArg.GetThisVar());
161 if (argc == NARG_CNT::ONE || (argc == NARG_CNT::TWO &&
162 !NVal(env, funcArg[NARG_POS::SECOND]).TypeIs(napi_function)) || (argc == NARG_CNT::THREE &&
163 !NVal(env, funcArg[NARG_POS::THIRD]).TypeIs(napi_function))) {
164 return NAsyncWorkPromise(env, thisVar).Schedule("FileIOOpen", cbExec, cbComplCallback).val_;
165 } else {
166 NVal cb(env, funcArg[argc - 1]);
167 return NAsyncWorkCallback(env, thisVar, cb).Schedule("FileIOOpen", cbExec, cbComplCallback).val_;
168 }
169 }
170 } // namespace ModuleFileIO
171 } // namespace DistributedFS
172 } // namespace OHOS