If you fork() after a vfork() do _both_ children have to exec/exit before the parent resumes? #dontcrossthestreams
The Linux man pages project documents it; your Ubuntu is just badly outdated. http://man7.org/linux/man-pages/man3/posix_spawn.3.html …
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I'm aware it's online and in posix. I don't care, but I'm aware of it. And 16.04 at work is newer than the one on my netbook. :)
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The man page is actually rather bad though; it documents some historical wrong implementation internals from glibc rather than documenting the abstract behavior applications should expect.
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