ceph-csi/vendor/k8s.io/kubernetes/pkg/kubelet/winstats/version.go

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2018-01-09 18:57:14 +00:00
// +build windows
/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package winstats
import (
"fmt"
"unsafe"
"golang.org/x/sys/windows"
)
// getCurrentVersionVal gets value of speficied key from registry.
func getCurrentVersionVal(key string) (string, error) {
var h windows.Handle
if err := windows.RegOpenKeyEx(windows.HKEY_LOCAL_MACHINE,
windows.StringToUTF16Ptr(`SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\`),
0,
windows.KEY_READ,
&h); err != nil {
return "", err
}
defer windows.RegCloseKey(h)
var buf [128]uint16
var typ uint32
n := uint32(len(buf) * int(unsafe.Sizeof(buf[0]))) // api expects array of bytes, not uint16
if err := windows.RegQueryValueEx(h,
windows.StringToUTF16Ptr(key),
nil,
&typ,
(*byte)(unsafe.Pointer(&buf[0])),
&n); err != nil {
return "", err
}
return windows.UTF16ToString(buf[:]), nil
}
// getVersionRevision gets revision from UBR registry.
func getVersionRevision() (uint16, error) {
revisionString, err := getCurrentVersionVal("UBR")
if err != nil {
return 0, err
}
revision, err := windows.UTF16FromString(revisionString)
if err != nil {
return 0, err
}
return revision[0], nil
}
// getKernelVersion gets the version of windows kernel.
func getKernelVersion() (string, error) {
ver, err := windows.GetVersion()
if err != nil {
return "", err
}
revision, err := getVersionRevision()
if err != nil {
return "", err
}
major := ver & 0xFF
minor := (ver >> 8) & 0xFF
build := (ver >> 16) & 0xFFFF
return fmt.Sprintf("%d.%d.%05d.%d\n", major, minor, build, revision), nil
}
// getOSImageVersion gets the osImage name and version.
func getOSImageVersion() (string, error) {
productName, err := getCurrentVersionVal("ProductName")
if err != nil {
return "", nil
}
return productName, nil
}