1 /*
2 * Copyright (c) 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
16 #include "napi/native_api.h"
17 #include <sys/fsuid.h>
18 #include <unistd.h>
19
20 #define PARAM_0 0
21 #define ONEVAL 1
22 #define MINUSONE (-1)
23
Setfsgid(napi_env env, napi_callback_info info)24 static napi_value Setfsgid(napi_env env, napi_callback_info info)
25 {
26 napi_value result;
27 const gid_t fsgid = ONEVAL;
28 int setval = setfsgid(fsgid);
29 if (setval < PARAM_0) {
30 napi_create_int32(env, MINUSONE, &result);
31 } else {
32 napi_create_int32(env, PARAM_0, &result);
33 }
34 return result;
35 }
36
Setfsuid(napi_env env, napi_callback_info info)37 static napi_value Setfsuid(napi_env env, napi_callback_info info)
38 {
39 const gid_t invalid_fsuid = ONEVAL;
40 int setval = setfsuid(invalid_fsuid);
41 napi_value result;
42 if (setval < PARAM_0) {
43 napi_create_int32(env, MINUSONE, &result);
44 } else {
45 napi_create_int32(env, PARAM_0, &result);
46 }
47 return result;
48 }
49
50 EXTERN_C_START
Init(napi_env env, napi_value exports)51 static napi_value Init(napi_env env, napi_value exports)
52 {
53 napi_property_descriptor desc[] = {
54 {"setfsgid", nullptr, Setfsgid, nullptr, nullptr, nullptr, napi_default, nullptr},
55 {"setfsuid", nullptr, Setfsuid, nullptr, nullptr, nullptr, napi_default, nullptr},
56 };
57 napi_define_properties(env, exports, sizeof(desc) / sizeof(desc[0]), desc);
58 return exports;
59 }
60
61 EXTERN_C_END
62
63 static napi_module demoModule = {
64 .nm_version = 1,
65 .nm_flags = 0,
66 .nm_filename = nullptr,
67 .nm_register_func = Init,
68 .nm_modname = "fsuid",
69 .nm_priv = ((void *)0),
70 .reserved = {0},
71 };
72
RegisterEntryModule(void)73 extern "C" __attribute__((constructor)) void RegisterEntryModule(void) { napi_module_register(&demoModule); }
74