mirror of
https://github.com/lxc/incus.git
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5235c6fd6b
Using more modern features of Go, such as: - conditional assignment -> built-in min or max in go1.21, - sort.Slice -> slices.Sort in go1.21, - loop assign map -> maps.Copy in go1.21, - []byte(fmt.Sprintf...) -> fmt.Appendf(nil,...) in go1.19, - strings.HasPrefix / strings.TrimPrefix -> strings.CutPrefix in go1.20 Signed-off-by: JUN JIE NAN <nanjunjie@gmail.com>
89 lines
1.9 KiB
Go
89 lines
1.9 KiB
Go
//go:build linux
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package linux
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import (
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"fmt"
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"reflect"
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"golang.org/x/sys/unix"
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"github.com/lxc/incus/v6/shared/subprocess"
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"github.com/lxc/incus/v6/shared/util"
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)
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// LoadModule loads the kernel module with the given name, by invoking
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// modprobe. This respects any modprobe configuration on the system.
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func LoadModule(module string) error {
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if util.PathExists(fmt.Sprintf("/sys/module/%s", module)) {
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return nil
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}
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_, err := subprocess.RunCommand("modprobe", "-b", module)
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return err
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}
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// Utsname returns the same info as unix.Utsname, as strings.
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type Utsname struct {
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Sysname string
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Nodename string
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Release string
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Version string
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Machine string
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Domainname string
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}
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// Uname returns Utsname as strings.
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func Uname() (*Utsname, error) {
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/*
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* Based on: https://groups.google.com/forum/#!topic/golang-nuts/Jel8Bb-YwX8
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* there is really no better way to do this, which is
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* unfortunate. Also, we ditch the more accepted CharsToString
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* version in that thread, since it doesn't seem as portable,
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* viz. github issue #206.
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*/
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uname := unix.Utsname{}
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err := unix.Uname(&uname)
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if err != nil {
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return nil, err
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}
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return &Utsname{
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Sysname: intArrayToString(uname.Sysname),
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Nodename: intArrayToString(uname.Nodename),
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Release: intArrayToString(uname.Release),
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Version: intArrayToString(uname.Version),
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Machine: intArrayToString(uname.Machine),
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Domainname: intArrayToString(uname.Domainname),
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}, nil
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}
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func intArrayToString(arr any) string {
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slice := reflect.ValueOf(arr)
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s := ""
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for i := range slice.Len() {
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val := slice.Index(i)
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valInt := int64(-1)
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switch val.Kind() {
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case reflect.Int:
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case reflect.Int8:
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valInt = int64(val.Int())
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case reflect.Uint:
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case reflect.Uint8:
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valInt = int64(val.Uint())
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default:
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continue
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}
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if valInt == 0 {
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break
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}
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s += string(byte(valInt))
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}
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return s
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}
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