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