sysctl

Get will return the OS release version. On linux the kernel version something like: 6.13.3 On OpenBSD something like: 7.6

package main

import (
	"fmt"
	"runtime"

	"catinello.eu/sysctl"
)

func main() {
	var key string

	switch runtime.GOOS {
	case "linux":
		key = "kernel.osrelease"
	case "openbsd", "freebsd", "netbsd", "dragonfly", "darwin":
		key = "kern.osrelease"
	}

	version, err := sysctl.Get(key)
	if err != nil {
		panic(err)
	}

	fmt.Println(version)
}

List will return a list of available sysctl keys. We will filter by "kern" prefix.

package main

import (
	"fmt"
	"strings"

	"catinello.eu/sysctl"
)

func main() {
	list, err := sysctl.List()
	if err != nil {
		panic(err)
	}

	for _, l := range list {
		if strings.HasPrefix(l, "kern") {
			fmt.Println(l)
		}
	}
}