/*
 * Copyright (c) 2022 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include <string.h>
#include "init_module_engine.h"
#include "plugin_adapter.h"
#include "seccomp_policy.h"

#define SA_MAIN_PATH ("/system/bin/sa_main")

static int SetSystemSeccompPolicy(int id, const char *name, int argc, const char **argv)
{
    PLUGIN_CHECK(argc == 2, return -1, "Invalid parameter");
    SeccompFilterType type = SYSTEM_SA;
    if (strncmp(SA_MAIN_PATH, argv[1], strlen(SA_MAIN_PATH)) != 0) {
        type = SYSTEM_OTHERS;
    }
    bool ret = SetSeccompPolicyWithName(type, argv[0]);
    PLUGIN_CHECK(ret == true, return -1;
                 exit(PROCESS_EXIT_CODE), "Set system seccomp spolicy failed and exit");

    return 0;
}

static int32_t g_executorId = -1;
static int SetSeccompPolicyInit(void)
{
    if (g_executorId == -1) {
        g_executorId = AddCmdExecutor("SetSeccompPolicy", SetSystemSeccompPolicy);
    }
    return 0;
}

static int SeccompHook(const HOOK_INFO *info, void *cookie)
{
    SetSeccompPolicyInit();
    PLUGIN_LOGI("seccomp enabled.");
    return 0;
}

MODULE_CONSTRUCTOR(void)
{
    InitAddPostCfgLoadHook(0, SeccompHook);
}