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 #include <string.h>
16 #include "init_module_engine.h"
17 #include "plugin_adapter.h"
18 #include "seccomp_policy.h"
19
20 #define SA_MAIN_PATH ("/system/bin/sa_main")
21
SetSystemSeccompPolicy(int id,const char * name,int argc,const char ** argv)22 static int SetSystemSeccompPolicy(int id, const char *name, int argc, const char **argv)
23 {
24 PLUGIN_CHECK(argc == 2, return -1, "Invalid parameter");
25 SeccompFilterType type = SYSTEM_SA;
26 if (strncmp(SA_MAIN_PATH, argv[1], strlen(SA_MAIN_PATH)) != 0) {
27 type = SYSTEM_OTHERS;
28 }
29 bool ret = SetSeccompPolicyWithName(type, argv[0]);
30 PLUGIN_CHECK(ret == true, return -1;
31 exit(PROCESS_EXIT_CODE), "Set system seccomp spolicy failed and exit");
32
33 return 0;
34 }
35
36 static int32_t g_executorId = -1;
SetSeccompPolicyInit(void)37 static int SetSeccompPolicyInit(void)
38 {
39 if (g_executorId == -1) {
40 g_executorId = AddCmdExecutor("SetSeccompPolicy", SetSystemSeccompPolicy);
41 }
42 return 0;
43 }
44
SeccompHook(const HOOK_INFO * info,void * cookie)45 static int SeccompHook(const HOOK_INFO *info, void *cookie)
46 {
47 SetSeccompPolicyInit();
48 PLUGIN_LOGI("seccomp enabled.");
49 return 0;
50 }
51
MODULE_CONSTRUCTOR(void)52 MODULE_CONSTRUCTOR(void)
53 {
54 InitAddPostCfgLoadHook(0, SeccompHook);
55 }
56