[Bug stdio/22834] Subprocess forked by popen may crash in Linux when multithreads call popen

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=22834

--- Comment #2 from Florian Weimer <fweimer at redhat dot com> ---
So the strangeness here is that the O_CLOEXEC is optional in the parent
process.  The implementation assumes that other popen descriptors always closed
by popen in its subprocess, but for execve, the closing is optional.

I'm not sure what POSIX intends here.

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