| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #include <unistd.h> |
| |
| #include <android-base/unique_fd.h> |
| |
| // Helper to automatically close an FD when it goes out of scope. |
| struct AdbCloser { |
| static void Close(int fd); |
| }; |
| |
| using unique_fd = android::base::unique_fd_impl<AdbCloser>; |
| |
| #if !defined(_WIN32) |
| inline bool Pipe(unique_fd* read, unique_fd* write, int flags = 0) { |
| int pipefd[2]; |
| #if !defined(__APPLE__) |
| if (pipe2(pipefd, flags) != 0) { |
| return false; |
| } |
| #else |
| // Darwin doesn't have pipe2. Implement it ourselves. |
| if (flags != 0 && (flags & ~(O_CLOEXEC | O_NONBLOCK)) != 0) { |
| errno = EINVAL; |
| return false; |
| } |
| |
| if (pipe(pipefd) != 0) { |
| return false; |
| } |
| |
| if (flags & O_CLOEXEC) { |
| if (fcntl(pipefd[0], F_SETFD, FD_CLOEXEC) != 0 || |
| fcntl(pipefd[1], F_SETFD, FD_CLOEXEC) != 0) { |
| PLOG(FATAL) << "failed to set FD_CLOEXEC on newly created pipe"; |
| } |
| } |
| |
| if (flags & O_NONBLOCK) { |
| if (fcntl(pipefd[0], F_SETFL, O_NONBLOCK) != 0 || |
| fcntl(pipefd[1], F_SETFL, O_NONBLOCK) != 0) { |
| PLOG(FATAL) << "failed to set O_NONBLOCK on newly created pipe"; |
| } |
| } |
| #endif |
| |
| read->reset(pipefd[0]); |
| write->reset(pipefd[1]); |
| return true; |
| } |
| #endif |