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 <js_native_api.h>
18 #include <js_native_api_types.h>
19 #include <linux/capability.h>
20 #include <node_api.h>
21 #include <sys/capability.h>
22 #include <unistd.h>
23 #include <uv.h>
24
25 #define PARAM_0 0
26 #define PARAM_1 1
27 #define FAIL (-1)
28 #define PARAM_UNNORMAL (-1)
29 #define ERRNO_0 0
30 #define ONEVAL 1
31
CapGet(napi_env env, napi_callback_info info)32 static napi_value CapGet(napi_env env, napi_callback_info info)
33 {
34 size_t argc = ONEVAL;
35 napi_value args[1] = {nullptr};
36 napi_get_cb_info(env, info, &argc, args, nullptr, nullptr);
37 int param;
38 napi_get_value_int32(env, args[0], ¶m);
39
40 int ret;
41 struct __user_cap_data_struct cap_data;
42 errno = ERRNO_0;
43 if (param == PARAM_0) {
44 struct __user_cap_header_struct cap_header;
45 cap_header.pid = getpid();
46 cap_header.version = _LINUX_CAPABILITY_VERSION_1;
47 ret = capget(&cap_header, &cap_data);
48 } else {
49 ret = capget(nullptr, &cap_data);
50 }
51
52 napi_value result = nullptr;
53 napi_create_int32(env, ret, &result);
54 return result;
55 }
56
57 EXTERN_C_START
Init(napi_env env, napi_value exports)58 static napi_value Init(napi_env env, napi_value exports)
59 {
60 napi_property_descriptor desc[] = {
61 {"capget", nullptr, CapGet, nullptr, nullptr, nullptr, napi_default, nullptr},
62 };
63 napi_define_properties(env, exports, sizeof(desc) / sizeof(desc[0]), desc);
64 return exports;
65 }
66 EXTERN_C_END
67
68 static napi_module demoModule = {
69 .nm_version = 1,
70 .nm_flags = 0,
71 .nm_filename = "capability1ndk",
72 .nm_register_func = Init,
73 .nm_modname = "capability1ndk",
74 .nm_priv = ((void *)0),
75 .reserved = {0},
76 };
77
RegisterModule(void)78 extern "C" __attribute__((constructor)) void RegisterModule(void) { napi_module_register(&demoModule); }