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 "link.h"
16
17 #include <cstring>
18 #include <fcntl.h>
19 #include <tuple>
20 #include <unistd.h>
21
22 #include "../../common/napi/n_async/n_async_work_callback.h"
23 #include "../../common/napi/n_async/n_async_work_promise.h"
24 #include "../../common/napi/n_func_arg.h"
25
26 namespace OHOS {
27 namespace DistributedFS {
28 namespace ModuleFileIO {
29 using namespace std;
30
GetLinkArg(napi_env env,const NFuncArg & funcArg)31 static tuple<bool, string, string> GetLinkArg(napi_env env, const NFuncArg &funcArg)
32 {
33 bool succ = false;
34 unique_ptr<char[]> src;
35 tie(succ, src, ignore) = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8String();
36 if (!succ) {
37 UniError(EINVAL).ThrowErr(env, "Invalid src");
38 return { false, "", "" };
39 }
40
41 unique_ptr<char[]> dest;
42 tie(succ, dest, ignore) = NVal(env, funcArg[NARG_POS::SECOND]).ToUTF8String();
43 if (!succ) {
44 UniError(EINVAL).ThrowErr(env, "Invalid dest");
45 return { false, "", "" };
46 }
47 return { true, src.get(), dest.get() };
48 }
49
Sync(napi_env env,napi_callback_info info)50 napi_value Link::Sync(napi_env env, napi_callback_info info)
51 {
52 NFuncArg funcArg(env, info);
53 if (!funcArg.InitArgs(NARG_CNT::TWO)) {
54 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
55 return nullptr;
56 }
57
58 bool succ = false;
59 string oldPath;
60 string newPath;
61 tie(succ, oldPath, newPath) = GetLinkArg(env, funcArg);
62 if (!succ) {
63 return nullptr;
64 }
65 if (link(oldPath.c_str(), newPath.c_str()) == -1) {
66 UniError(errno).ThrowErr(env);
67 return nullptr;
68 }
69 return NVal::CreateUndefined(env).val_;
70 }
71
Async(napi_env env,napi_callback_info info)72 napi_value Link::Async(napi_env env, napi_callback_info info)
73 {
74 NFuncArg funcArg(env, info);
75
76 if (!funcArg.InitArgs(NARG_CNT::TWO, NARG_CNT::THREE)) {
77 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
78 return nullptr;
79 }
80
81 bool succ = false;
82 string oldPath;
83 string newPath;
84 tie(succ, oldPath, newPath) = GetLinkArg(env, funcArg);
85 if (!succ) {
86 return nullptr;
87 }
88
89 auto cbExec = [oldPath = move(oldPath), newPath = move(newPath)](napi_env env) -> UniError {
90 int ret = link(oldPath.c_str(), newPath.c_str());
91 if (ret == -1) {
92 return UniError(errno);
93 } else {
94 return UniError(ERRNO_NOERR);
95 }
96 };
97
98 auto cbComplCallback = [](napi_env env, UniError err) -> NVal {
99 if (err) {
100 return { env, err.GetNapiErr(env) };
101 }
102 return { NVal::CreateUndefined(env) };
103 };
104
105 string procedureName = "FileIOLink";
106 NVal thisVar(env, funcArg.GetThisVar());
107 size_t argc = funcArg.GetArgc();
108 if (argc == NARG_CNT::TWO) {
109 return NAsyncWorkPromise(env, thisVar).Schedule(procedureName, cbExec, cbComplCallback).val_;
110 } else {
111 NVal cb(env, funcArg[NARG_POS::THIRD]);
112 return NAsyncWorkCallback(env, thisVar, cb).Schedule(procedureName, cbExec, cbComplCallback).val_;
113 }
114 }
115 } // namespace ModuleFileIO
116 } // namespace DistributedFS
117 } // namespace OHOS