AMD64 linux only

gouname.go

package main

import (
	"fmt"
	"os"
	"os/exec"
	"syscall"
	"unsafe"
)

const __NEW_UTS_LEN = 64

type new_utsname struct {
	sysname    [__NEW_UTS_LEN + 1]byte
	nodename   [__NEW_UTS_LEN + 1]byte
	release    [__NEW_UTS_LEN + 1]byte
	version    [__NEW_UTS_LEN + 1]byte
	machine    [__NEW_UTS_LEN + 1]byte
	domainname [__NEW_UTS_LEN + 1]byte
}

func main() {
	fmt.Println("real uname")

	cmd := exec.Command("uname", "-a")
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr

	cmd.Run()

	fmt.Println("\nour uname")

	var uts new_utsname
	syscall.Syscall(63, uintptr(unsafe.Pointer(&uts)), 0, 0)

	fmt.Println("sysname", string(uts.sysname[:]))
	fmt.Println("nodename", string(uts.nodename[:]))
	fmt.Println("release", string(uts.release[:]))
	fmt.Println("version", string(uts.version[:]))
	fmt.Println("machine", string(uts.machine[:]))
	fmt.Println("domainname", string(uts.domainname[:]))
}