| #!/usr/bin/env python |
| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you 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. |
| |
| """ |
| In the Apache Jenkins setup, the standard output and error file descriptors |
| are marked as non-blocking. As most programs do not correctly handle |
| `EAGAIN`, we pipe Jenkins scripts through this instead. |
| |
| Example: ./support/jenkins/buildbot.sh | ./support/jenkins/cat.py |
| """ |
| |
| import fcntl |
| import os |
| import sys |
| |
| flags = fcntl.fcntl(sys.stdout, fcntl.F_GETFL) |
| fcntl.fcntl(sys.stdout, fcntl.F_SETFL, flags&~os.O_NONBLOCK) |
| |
| while True: |
| data = os.read(sys.stdin.fileno(), 1024) |
| if not data: |
| break |
| |
| os.write(sys.stdout.fileno(), data) |