[issue12040] Expose a Process.sentinel property (and fix polling loop in Process.join())

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> Just a detail, but with the last version, select is retried with the
> full timeout (note that the signal you're the most likely to receive
> is SIGCHLD and since it's ignored by default it won't cause EINTR, so
> this shouldn't happen too often).

Indeed, it is. In practice we don't see anyone complaining about EINTR
issues, so I guess it's quite rare anyway.

> By the way, it's not the first time EINTR-issues pop up: would it be
> possible/worth it/interesting to expose this kind of wrapper somewhere
> (even as a private API), or a context manager ?

Yes, but where?

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<http://bugs.python.org/issue12040>
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