tree 9c957a13ea64f028b3011f995c9d3b83ac9df2dc
parent c3d80250170dec19bf61949c81233cede5ddaf61
author Kir Kolyshkin <kolyshkin@gmail.com> 1586127269 -0700
committer Tobias Klauser <tobias.klauser@gmail.com> 1586172870 +0000

unix: add openat2 for linux

openat2 is a new syscall added to Linux 5.6. It provides a superset
of openat(2) functionality, providing a way to extend it in the future,
and (for now) adding flags telling the kernel how to resolve the path.

For more info on openat2, see https://lwn.net/Articles/803237/

A primitive test case is added to check that Openat2 works as
it should. Tested to skip on kernel 5.5 and pass on 5.6.

Change-Id: Ib8bbd71791762f043200543cecdea16d2fd3c81d
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Reviewed-on: https://go-review.googlesource.com/c/sys/+/227280
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>