unix: add Darwin support for clonefile syscalls

This commit adds support for three Darwin-specific calls that accelerate
the copying of files:

* clonefile()
* clonefileat()
* fclonefileat()

Fixes golang/go#41366

Change-Id: I7e6c525fc23d8474ea85feff24314d3d672d87ed
Reviewed-on: https://go-review.googlesource.com/c/sys/+/254757
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Tobias Klauser <tobias.klauser@gmail.com>
10 files changed
tree: 73552d5775d51a6ed644ab72094da19bea97c60a
  1. .gitattributes
  2. .gitignore
  3. AUTHORS
  4. CONTRIBUTING.md
  5. CONTRIBUTORS
  6. LICENSE
  7. PATENTS
  8. README.md
  9. codereview.cfg
  10. cpu/
  11. go.mod
  12. internal/
  13. plan9/
  14. unix/
  15. windows/
README.md

sys

This repository holds supplemental Go packages for low-level interactions with the operating system.

Download/Install

The easiest way to install is to run go get -u golang.org/x/sys. You can also manually git clone the repository to $GOPATH/src/golang.org/x/sys.

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html.

The main issue tracker for the sys repository is located at https://github.com/golang/go/issues. Prefix your issue with “x/sys:” in the subject line, so it is easy to find.