[issue8052] subprocess close_fds behavior should only close open fds

[Antoine Pitrou]

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

> Of course, procfs isn't standard in any case; would it be necessary to
> have a fallback for systems without it? Or do all *nix systems that we
> care about provide it?

/proc/self doesn't exist under OpenSolaris. You have to use /proc/<pid>.
And I suppose there can be circumstances where /proc isn't available at
all (chroot perhaps?). So we would definitely have to provide a
fallback.

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