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|
//go:build linux
package linux
import (
"fmt"
"reflect"
"golang.org/x/sys/unix"
"github.com/lxc/incus/v6/shared/subprocess"
"github.com/lxc/incus/v6/shared/util"
)
// LoadModule loads the kernel module with the given name, by invoking
// modprobe. This respects any modprobe configuration on the system.
func LoadModule(module string) error {
if util.PathExists(fmt.Sprintf("/sys/module/%s", module)) {
return nil
}
_, err := subprocess.RunCommand("modprobe", "-b", module)
return err
}
// Utsname returns the same info as unix.Utsname, as strings.
type Utsname struct {
Sysname string
Nodename string
Release string
Version string
Machine string
Domainname string
}
// Uname returns Utsname as strings.
func Uname() (*Utsname, error) {
/*
* Based on: https://groups.google.com/forum/#!topic/golang-nuts/Jel8Bb-YwX8
* there is really no better way to do this, which is
* unfortunate. Also, we ditch the more accepted CharsToString
* version in that thread, since it doesn't seem as portable,
* viz. github issue #206.
*/
uname := unix.Utsname{}
err := unix.Uname(&uname)
if err != nil {
return nil, err
}
return &Utsname{
Sysname: intArrayToString(uname.Sysname),
Nodename: intArrayToString(uname.Nodename),
Release: intArrayToString(uname.Release),
Version: intArrayToString(uname.Version),
Machine: intArrayToString(uname.Machine),
Domainname: intArrayToString(uname.Domainname),
}, nil
}
func intArrayToString(arr any) string {
slice := reflect.ValueOf(arr)
s := ""
for i := range slice.Len() {
val := slice.Index(i)
valInt := int64(-1)
switch val.Kind() {
case reflect.Int:
case reflect.Int8:
valInt = int64(val.Int())
case reflect.Uint:
case reflect.Uint8:
valInt = int64(val.Uint())
default:
continue
}
if valInt == 0 {
break
}
s += string(byte(valInt))
}
return s
}
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