1 /* 2 * Copyright (C) 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_INSTALLD_EXECV_HELPER_H 18 #define ANDROID_INSTALLD_EXECV_HELPER_H 19 20 #include <string> 21 #include <vector> 22 23 namespace android { 24 namespace installd { 25 26 // ExecVHelper prepares and holds pointers to parsed command line arguments so that no allocations 27 // need to be performed between the fork and exec. 28 class ExecVHelper { 29 public: 30 ExecVHelper(); 31 virtual ~ExecVHelper(); 32 33 [[ noreturn ]] 34 virtual void Exec(int exit_code); 35 36 void PrepareArgs(const std::string& bin); 37 38 // Add an arg if it's not empty. 39 void AddArg(const std::string& arg); 40 41 // Add a runtime arg if it's not empty. 42 void AddRuntimeArg(const std::string& arg); 43 44 protected: 45 // Holder arrays for backing arg storage. 46 std::vector<std::string> args_; 47 48 // Argument poiners. 49 std::vector<const char*> argv_; 50 }; 51 52 } // namespace installd 53 } // namespace android 54 55 #endif // ANDROID_INSTALLD_EXECV_HELPER_H 56