unix.UtimesNanoAt now supported on Darwin and sets nanosecond precision if the filesystems does.
This call is now generally supported. Note that os.Chtimes also sets nanosecond precision,
but will always follow symlinks so not appropriate.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
This mainly fixes Linux vs generic Unix differences, with some
differences between Darwin and Freebsd (which are close bit not
identical). Should make fixing for other Unix platforms easier.
Note there are not yet `runc` equivalents for these platforms;
my current use case is image manipulation for the `moby` tool.
However there is interest in OCI runtime ports for both platforms.
Current status is that MacOS can build and run `ctr`, `dist`
and `containerd` and some operations are supported. FreeBSD 11
still needs some more fixes to continuity for extended attributes.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
