All BSDs use the same implementation to get BootTime{,WithContext} and
Uptime{,WithContext} based on the kern.boottime sysctl. Move this
implementation to a separate host/host_bsd.go file shared by darwin,
freebsd and openbsd. Also use SysctlTimeval to get
the boot time directly as a type Timeval instead of manually
extracting it using package unsafe. It will also allow for easier reuse
to support package host on e.g. Dragonfly BSD or NetBSD.
This requires updating the golang.org/x/sys/unix dependency to the
latest revision.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
The /System/Library/CoreServices/ServerVersion.plist exists on macOS servers , but not on a workstation such as my laptop. The actual terminoly is mostly borrowed from the windows equivalent as @Lomanic suggested. In theory, this should make interpreting the results from the two platforms a bit more consistent.
Note: The macOS server application can be installed on almost any macOS workstation to make it a server that can manage other apple devices.
When fetching stats on all processes at once there's a non-trivial amount of
time spent in the `BootTime` call. But since this value should never change
during a live process, we can use a cached version for all subsequent calls.
This is mostly intended for Linux, where we are returning the OS version
in the PlatformVersion field, which seems reasonable. Often it is still
useful to know which Linux kernel is running.
For FreeBSD and Darwin the kernel version matches the platform version,
since they previously used the kernel version for the platform version.
For Windows the kernel version is empty, since there is no clear way
to determine it.
On supported hosts the value returned is a UUID (case preserving
from the value of the underlying OS).
For Linux this is generated once, randomly per boot. For FreeBSD and
Darwin this is a more durable value that should persist across reboots.
shirou