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 = nullptr;
27 int ret = MINUSONE;
28 int oldval = setfsgid(MINUSONE);
29 if (oldval >= PARAM_0) {
30 int setval = setfsgid(oldval);
31 setval = setfsgid(MINUSONE);
32 if (setval == oldval) {
33 ret = PARAM_0;
34 }
35 }
36 napi_create_int32(env, ret, &result);
37 return result;
38 }
39
Setfsuid(napi_env env, napi_callback_info info)40 static napi_value Setfsuid(napi_env env, napi_callback_info info)
41 {
42 napi_value result = nullptr;
43 int ret = MINUSONE;
44 int oldval = setfsuid(MINUSONE);
45 if (oldval >= PARAM_0) {
46 int setval = setfsuid(oldval);
47 setval = setfsuid(MINUSONE);
48 if (setval == oldval) {
49 ret = PARAM_0;
50 }
51 }
52 napi_create_int32(env, ret, &result);
53 return result;
54 }
55
56 EXTERN_C_START
Init(napi_env env, napi_value exports)57 static napi_value Init(napi_env env, napi_value exports)
58 {
59 napi_property_descriptor desc[] = {
60 {"setfsgid", nullptr, Setfsgid, nullptr, nullptr, nullptr, napi_default, nullptr},
61 {"setfsuid", nullptr, Setfsuid, nullptr, nullptr, nullptr, napi_default, nullptr},
62 };
63 napi_define_properties(env, exports, sizeof(desc) / sizeof(desc[0]), desc);
64 return exports;
65 }
66
67 EXTERN_C_END
68
69 static napi_module demoModule = {
70 .nm_version = 1,
71 .nm_flags = 0,
72 .nm_filename = nullptr,
73 .nm_register_func = Init,
74 .nm_modname = "fsuid1",
75 .nm_priv = ((void *)0),
76 .reserved = {0},
77 };
78
RegisterEntryModule(void)79 extern "C" __attribute__((constructor)) void RegisterEntryModule(void) { napi_module_register(&demoModule); }
80