| import signal, subprocess, sys, time | |
| # On Linux this causes os.waitpid to fail with OSError as the OS has already | |
| # reaped our child process. The wait() passing the OSError on to the caller | |
| # and causing us to exit with an error is what we are testing against. | |
| signal.signal(signal.SIGCHLD, signal.SIG_IGN) | |
| subprocess.Popen([sys.executable, '-c', 'print("albatross")']).wait() | |
| # Also ensure poll() handles an errno.ECHILD appropriately. | |
| p = subprocess.Popen([sys.executable, '-c', 'print("albatross")']) | |
| num_polls = 0 | |
| while p.poll() is None: | |
| # Waiting for the process to finish. | |
| time.sleep(0.01) # Avoid being a CPU busy loop. | |
| num_polls += 1 | |
| if num_polls > 3000: | |
| raise RuntimeError('poll should have returned 0 within 30 seconds') |