1 /*
2 * Copyright (c) 2022 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 "napi/native_api.h"
17 #include <cerrno>
18 #include <dirent.h>
19 #include <dlfcn.h>
20 #include <fcntl.h>
21 #include <js_native_api_types.h>
22
23 #define INIT (-1)
24 #define SUCCESS 0
25
DlSym(napi_env env, napi_callback_info info)26 static napi_value DlSym(napi_env env, napi_callback_info info)
27 {
28 const char *path = "/system/lib/extensionability/libstatic_subscriber_extension_module.z.so";
29 void *ptr = dlopen(path, RTLD_LAZY);
30 errno = 0;
31 dlsym(ptr, "OHOS_EXTENSION_GetExtensionModule");
32 napi_value result = nullptr;
33 napi_create_int32(env, errno, &result);
34 return result;
35 }
36
DlVSym(napi_env env, napi_callback_info info)37 static napi_value DlVSym(napi_env env, napi_callback_info info)
38 {
39 const char *path = "/system/lib/extensionability/libstatic_subscriber_extension_module.z.so";
40 void *ptr = dlopen(path, RTLD_LAZY);
41 errno = 0;
42 const char *dso_easy_symver_version_stable = "STABLE";
43 dlvsym(ptr, "OHOS_EXTENSION_GetExtensionModule", dso_easy_symver_version_stable);
44 napi_value result = nullptr;
45 napi_create_int32(env, errno, &result);
46 return result;
47 }
48
49 EXTERN_C_START
Init(napi_env env, napi_value exports)50 static napi_value Init(napi_env env, napi_value exports)
51 {
52 napi_property_descriptor desc[] = {
53 {"dlsym", nullptr, DlSym, nullptr, nullptr, nullptr, napi_default, nullptr},
54 {"dlvsym", nullptr, DlVSym, nullptr, nullptr, nullptr, napi_default, nullptr},
55 };
56 napi_define_properties(env, exports, sizeof(desc) / sizeof(desc[0]), desc);
57 return exports;
58 }
59 EXTERN_C_END
60
61 static napi_module demoModule = {
62 .nm_version = 1,
63 .nm_flags = 0,
64 .nm_filename = nullptr,
65 .nm_register_func = Init,
66 .nm_modname = "libdlfcnndk",
67 .nm_priv = ((void *)0),
68 .reserved = {0},
69 };
70
RegisterModule(void)71 extern "C" __attribute__((constructor)) void RegisterModule(void) { napi_module_register(&demoModule); }
72