[Python-Dev] test_signal on osx g4

[Ralf Schmitt]

this is http://bugs.python.org/issue1068268

On Tue, Apr 1, 2008 at 5:05 PM, <skip at pobox.com> wrote:

> test_signal is failing on osx g4:
>
>    test test_signal failed -- Traceback (most recent call last):
>      File
> "/Users/buildslave/bb/trunk.psf-g4/build/Lib/test/test_signal.py", line 151,
> in test_main
>        self.fail(tb)
>    AssertionError: Traceback (most recent call last):
>      File
> "/Users/buildslave/bb/trunk.psf-g4/build/Lib/test/test_signal.py", line 134,
> in test_main
>        self.run_test()
>      File
> "/Users/buildslave/bb/trunk.psf-g4/build/Lib/test/test_signal.py", line 80,
> in run_test
>        child = subprocess.Popen(['kill', '-HUP', str(pid)])
>      File "/Users/buildslave/bb/trunk.psf-g4/build/Lib/subprocess.py",
> line 593, in __init__
>        errread, errwrite)
>      File "/Users/buildslave/bb/trunk.psf-g4/build/Lib/subprocess.py",
> line 1078, in _execute_child
>        data = os.read(errpipe_read, 1048576) # Exceptions limited to 1 MB
>    OSError: [Errno 4] Interrupted system call
>
> This is the code which reads stderr from the child process:
>
>    data = os.read(errpipe_read, 1048576) # Exceptions limited to 1 MB
>    os.close(errpipe_read)
>    if data != "":
>        os.waitpid(self.pid, 0)
>        child_exception = pickle.loads(data)
>        raise child_exception
>
> I'm not an expert in this stuff my any stretch of the imagination, but
> shouldn't subprocess try harder to read this output?  Something like:
>
>    while True:
>        try:
>            data = os.read(errpipe_read, 1048576) # Exceptions limited to 1
> MB
>        except OSError, err:
>            if err.errno == errno.EINTR:
>                continue
>            else:
>                raise
>        else:
>            os.close(errpipe_read)
>            if data != "":
>                os.waitpid(self.pid, 0)
>                child_exception = pickle.loads(data)
>                raise child_exception
>            break
>
> Maybe not while True, but try a few times at least.
>

> Or is the system supposed to automatically restart interrupted system
> calls?
>

> Skip
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