Andrei Homescu | 7c0b79f | 2022-06-30 02:00:46 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2022 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 "OS.h" |
| 18 | |
| 19 | #include <android-base/file.h> |
Andrei Homescu | 024727b | 2022-08-24 23:54:59 +0000 | [diff] [blame^] | 20 | #include <binder/RpcTransportRaw.h> |
Andrei Homescu | 7c0b79f | 2022-06-30 02:00:46 +0000 | [diff] [blame] | 21 | #include <string.h> |
| 22 | |
| 23 | using android::base::ErrnoError; |
| 24 | using android::base::Result; |
| 25 | |
| 26 | namespace android { |
| 27 | |
| 28 | Result<void> setNonBlocking(android::base::borrowed_fd fd) { |
| 29 | int flags = TEMP_FAILURE_RETRY(fcntl(fd.get(), F_GETFL)); |
| 30 | if (flags == -1) { |
| 31 | return ErrnoError() << "Could not get flags for fd"; |
| 32 | } |
| 33 | if (int ret = TEMP_FAILURE_RETRY(fcntl(fd.get(), F_SETFL, flags | O_NONBLOCK)); ret == -1) { |
| 34 | return ErrnoError() << "Could not set non-blocking flag for fd"; |
| 35 | } |
| 36 | return {}; |
| 37 | } |
| 38 | |
| 39 | status_t getRandomBytes(uint8_t* data, size_t size) { |
| 40 | int ret = TEMP_FAILURE_RETRY(open("/dev/urandom", O_RDONLY | O_CLOEXEC | O_NOFOLLOW)); |
| 41 | if (ret == -1) { |
| 42 | return -errno; |
| 43 | } |
| 44 | |
| 45 | base::unique_fd fd(ret); |
| 46 | if (!base::ReadFully(fd, data, size)) { |
| 47 | return -errno; |
| 48 | } |
| 49 | return OK; |
| 50 | } |
| 51 | |
Andrei Homescu | 24ad36e | 2022-08-04 01:33:33 +0000 | [diff] [blame] | 52 | status_t dupFileDescriptor(int oldFd, int* newFd) { |
| 53 | int ret = fcntl(oldFd, F_DUPFD_CLOEXEC, 0); |
| 54 | if (ret < 0) { |
| 55 | return -errno; |
| 56 | } |
| 57 | |
| 58 | *newFd = ret; |
| 59 | return OK; |
| 60 | } |
| 61 | |
Andrei Homescu | 024727b | 2022-08-24 23:54:59 +0000 | [diff] [blame^] | 62 | std::unique_ptr<RpcTransportCtxFactory> makeDefaultRpcTransportCtxFactory() { |
| 63 | return RpcTransportCtxFactoryRaw::make(); |
| 64 | } |
| 65 | |
Andrei Homescu | 7c0b79f | 2022-06-30 02:00:46 +0000 | [diff] [blame] | 66 | } // namespace android |