tree acbf9786e5f727f1a44d84baa9c37bdaac24ba9e
parent fd5f0c170ac37caeac837d96642d00a0b2807478
author Tobias Klauser <tklauser@distanz.ch> 1596485854 +0200
committer Tobias Klauser <tobias.klauser@gmail.com> 1596488738 +0000

unix: add Faccessat2 and use it in Faccessat if available

Linux kernel 5.8 added the faccessat2 syscall taking a flags argument.
Attempt to use it in Faccessat and fall back to the existing
implementation mimicking glibc faccessat.

Tested on Debian Buster with manually built Linux kernel 5.8

Suggested by Ian Lance Taylor.

Change-Id: Ia14f744a63dde7ff2dea34935cabc62937de9cb5
Reviewed-on: https://go-review.googlesource.com/c/sys/+/246537
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>