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moby--moby/pkg/parsers/kernel/kernel_windows.go

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// +build windows
package kernel
import (
"fmt"
"syscall"
"unsafe"
)
// VersionInfo holds information about the kernel.
type VersionInfo struct {
kvi string // Version of the kernel (e.g. 6.1.7601.17592 -> 6)
major int // Major part of the kernel version (e.g. 6.1.7601.17592 -> 1)
minor int // Minor part of the kernel version (e.g. 6.1.7601.17592 -> 7601)
build int // Build number of the kernel version (e.g. 6.1.7601.17592 -> 17592)
}
func (k *VersionInfo) String() string {
return fmt.Sprintf("%d.%d %d (%s)", k.major, k.minor, k.build, k.kvi)
}
// GetKernelVersion gets the current kernel version.
func GetKernelVersion() (*VersionInfo, error) {
var (
h syscall.Handle
dwVersion uint32
err error
)
KVI := &VersionInfo{"Unknown", 0, 0, 0}
if err = syscall.RegOpenKeyEx(syscall.HKEY_LOCAL_MACHINE,
syscall.StringToUTF16Ptr(`SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\`),
0,
syscall.KEY_READ,
&h); err != nil {
return KVI, err
}
defer syscall.RegCloseKey(h)
var buf [1 << 10]uint16
var typ uint32
n := uint32(len(buf) * 2) // api expects array of bytes, not uint16
if err = syscall.RegQueryValueEx(h,
syscall.StringToUTF16Ptr("BuildLabEx"),
nil,
&typ,
(*byte)(unsafe.Pointer(&buf[0])),
&n); err != nil {
return KVI, err
}
KVI.kvi = syscall.UTF16ToString(buf[:])
// Important - docker.exe MUST be manifested for this API to return
// the correct information.
if dwVersion, err = syscall.GetVersion(); err != nil {
return KVI, err
}
KVI.major = int(dwVersion & 0xFF)
KVI.minor = int((dwVersion & 0XFF00) >> 8)
KVI.build = int((dwVersion & 0xFFFF0000) >> 16)
return KVI, nil
}