test_subprocess.py 文件源码

def test_communicate_eintr(self):
        # Issue #12493: communicate() should handle EINTR
        def handler(signum, frame):
            pass
        old_handler = signal.signal(signal.SIGUSR1, handler)
        self.addCleanup(signal.signal, signal.SIGUSR1, old_handler)

        args = [sys.executable, "-c",
                'import os, signal;'
                'os.kill(os.getppid(), signal.SIGUSR1)']
        for stream in ('stdout', 'stderr'):
            kw = {stream: subprocess.PIPE}
            with subprocess.Popen(args, **kw) as process:
                # communicate() will be interrupted by SIGUSR1
                process.communicate()


    # This test is Linux-ish specific for simplicity to at least have
    # some coverage.  It is not a platform specific bug.