1 /* 2 * Copyright (C) 2023 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 #include "fd.h" 18 19 namespace android { 20 CloseFd(const int * fd)21static void CloseFd(const int *fd) { 22 if (fd != nullptr) { 23 if (*fd >= 0) 24 close(*fd); 25 26 // NOLINTNEXTLINE(cppcoreguidelines-owning-memory) 27 delete fd; 28 } 29 } 30 MakeUniqueFd(int fd)31auto MakeUniqueFd(int fd) -> UniqueFd { 32 if (fd < 0) 33 return {nullptr, CloseFd}; 34 35 return {new int(fd), CloseFd}; 36 } 37 MakeSharedFd(int fd)38auto MakeSharedFd(int fd) -> SharedFd { 39 if (fd < 0) 40 return {}; 41 42 return {new int(fd), CloseFd}; 43 } 44 DupFd(SharedFd const & fd)45auto DupFd(SharedFd const &fd) -> int { 46 if (!fd) 47 return -1; 48 49 return fcntl(*fd, F_DUPFD_CLOEXEC, 0); 50 } 51 52 } // namespace android 53