Andreas Kling 65f2270232 Kernel+LibC+UserspaceEmulator: Bring back sys$dup2() ...

This is racy in userspace and non-racy in kernelspace so let's keep
it in kernelspace.

The behavior change where CLOEXEC is preserved when dup2() is called
with (old_fd == new_fd) was good though, let's keep that.

2020-08-15 11:11:34 +02:00

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