[dwattttt]

And as noted elsewhere, what you want is a new process with a specific fd: duplicating your current process state is a path-dependent evolution, rather than a logic step.

There have been plenty of comments here about effective workarounds, multi-process architectures to keep fork cheap, zygotes... these are very specifically working around the problem, while trying to avoid admitting it's a problem.

[uecker]

You are changing your argument. Let's first agree that my point that being able to use standard APIs (dup,close,pipe,...) is elegant and avoids having a lot of parameter for a process creation call.

[dwattttt]

I don't think it's an elegant design at all; I think it's a workable design given the constraint of requiring fork.

It's an achievable result with less specialised parts, but there's a reason we don't write all of our logic in NAND gates.

I'm still only inferring what you meant by CreateProcess needing special facilities; I assume you meant opt-in fd inheritance. Saving a parameter call while forcing all fds to be shared/duplicated seems penny-wise but pound-foolish.