1 /*
2 * Copyright (c) 2022-2023 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 "lstat.h"
16
17 #include <memory>
18 #include <tuple>
19
20 #include "class_stat/stat_entity.h"
21 #include "class_stat/stat_n_exporter.h"
22 #include "common_func.h"
23 #include "file_utils.h"
24 #include "filemgmt_libhilog.h"
25
26 namespace OHOS::FileManagement::ModuleFileIO {
27 using namespace std;
28 using namespace OHOS::FileManagement::LibN;
29
Sync(napi_env env,napi_callback_info info)30 napi_value Lstat::Sync(napi_env env, napi_callback_info info)
31 {
32 NFuncArg funcArg(env, info);
33 if (!funcArg.InitArgs(NARG_CNT::ONE)) {
34 HILOGE("Number of arguments unmatched");
35 NError(EINVAL).ThrowErr(env);
36 return nullptr;
37 }
38
39 auto [resGetFirstArg, pathPtr, ignore] = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8StringPath();
40 if (!resGetFirstArg) {
41 HILOGE("Invalid path");
42 NError(EINVAL).ThrowErr(env);
43 return nullptr;
44 }
45
46 std::unique_ptr<uv_fs_t, decltype(CommonFunc::fs_req_cleanup)*> lstat_req = {
47 new (std::nothrow) uv_fs_t, CommonFunc::fs_req_cleanup };
48 if (!lstat_req) {
49 HILOGE("Failed to request heap memory.");
50 NError(ENOMEM).ThrowErr(env);
51 return nullptr;
52 }
53 int ret = uv_fs_lstat(nullptr, lstat_req.get(), pathPtr.get(), nullptr);
54 if (ret < 0) {
55 HILOGE("Failed to get stat of file, ret: %{public}d", ret);
56 NError(ret).ThrowErr(env);
57 return nullptr;
58 }
59
60 auto stat = CommonFunc::InstantiateStat(env, lstat_req->statbuf).val_;
61 return stat;
62 }
63
LstatExec(shared_ptr<StatEntity> arg,const string & path)64 static NError LstatExec(shared_ptr<StatEntity> arg, const string &path)
65 {
66 std::unique_ptr<uv_fs_t, decltype(CommonFunc::fs_req_cleanup)*> lstat_req = {
67 new (std::nothrow) uv_fs_t, CommonFunc::fs_req_cleanup };
68 if (!lstat_req) {
69 HILOGE("Failed to request heap memory.");
70 return NError(ENOMEM);
71 }
72 int ret = uv_fs_lstat(nullptr, lstat_req.get(), path.c_str(), nullptr);
73 if (ret < 0) {
74 HILOGE("Failed to get stat of file, ret: %{public}d", ret);
75 return NError(ret);
76 } else {
77 arg->stat_ = lstat_req->statbuf;
78 return NError(ERRNO_NOERR);
79 }
80 }
81
Async(napi_env env,napi_callback_info info)82 napi_value Lstat::Async(napi_env env, napi_callback_info info)
83 {
84 NFuncArg funcArg(env, info);
85 if (!funcArg.InitArgs(NARG_CNT::ONE, NARG_CNT::TWO)) {
86 HILOGE("Number of arguments unmatched");
87 NError(EINVAL).ThrowErr(env);
88 return nullptr;
89 }
90
91 auto [resGetFirstArg, tmp, unused] = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8StringPath();
92 if (!resGetFirstArg) {
93 HILOGE("Invalid path");
94 NError(EINVAL).ThrowErr(env);
95 return nullptr;
96 }
97
98 string path = tmp.get();
99 auto arg = CreateSharedPtr<StatEntity>();
100 if (arg == nullptr) {
101 HILOGE("Failed to request heap memory.");
102 NError(ENOMEM).ThrowErr(env);
103 return nullptr;
104 }
105 auto cbExec = [arg, path]() -> NError {
106 return LstatExec(arg, path);
107 };
108
109 auto cbCompl = [arg](napi_env env, NError err) -> NVal {
110 if (err) {
111 return { env, err.GetNapiErr(env) };
112 }
113 auto stat = CommonFunc::InstantiateStat(env, arg->stat_, true);
114 return stat;
115 };
116
117 NVal thisVar(env, funcArg.GetThisVar());
118 if (funcArg.GetArgc() == NARG_CNT::ONE) {
119 return NAsyncWorkPromise(env, thisVar).Schedule(PROCEDURE_LSTAT_NAME, cbExec, cbCompl).val_;
120 } else {
121 NVal cb(env, funcArg[NARG_POS::SECOND]);
122 return NAsyncWorkCallback(env, thisVar, cb).Schedule(PROCEDURE_LSTAT_NAME, cbExec, cbCompl).val_;
123 }
124 }
125 } // namespace OHOS::FileManagement::ModuleFileIO