dup3 syscall - atomic set O_CLOEXEC with dup2

[Ed Schouten]

Hello Eitan,

* Eitan Adler <lists at eitanadler.com>, 20120112 06:01:
> This is an implementation of dup3 for FreeBSD:
> man page here (with a FreeBSD patch coming soon):
> https://www.kernel.org/doc/man-pages/online/pages/man2/dup.2.html
> 
> Is this implementation correct? If so any objection to adding this as
> a supported syscall?

I suspect that not long after we add dup3(), some random person asks us
to implement F_DUP3FD. Any chance you can implement this without using a
system call, but through fcntl()?

Thanks,
-- 
 Ed Schouten <ed at 80386.nl>
 WWW: http://80386.nl/
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