1 /* 2 * Copyright (C) 2024 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 ART_LIBARTBASE_BASE_PIDFD_H_ 18 #define ART_LIBARTBASE_BASE_PIDFD_H_ 19 20 #include <cstdint> 21 #include <cstdio> 22 23 #include "android-base/unique_fd.h" 24 25 #ifdef __BIONIC__ 26 #include <sys/pidfd.h> 27 #endif 28 29 namespace art { 30 PidfdOpen(pid_t pid,uint32_t flags)31[[maybe_unused]] static android::base::unique_fd PidfdOpen(pid_t pid, uint32_t flags) { 32 #ifdef __BIONIC__ 33 return android::base::unique_fd(pidfd_open(pid, flags)); 34 #else 35 // There is no glibc wrapper for pidfd_open. 36 #ifndef SYS_pidfd_open 37 constexpr int SYS_pidfd_open = 434; 38 #endif 39 return android::base::unique_fd(syscall(SYS_pidfd_open, pid, flags)); 40 #endif 41 } 42 43 } // namespace art 44 45 #endif // ART_LIBARTBASE_BASE_PIDFD_H_ 46