87 lines
2.1 KiB
Go
87 lines
2.1 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package hostinfo
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import (
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"golang.org/x/sys/windows"
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"golang.org/x/sys/windows/registry"
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"tailscale.com/types/ptr"
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"tailscale.com/util/winutil"
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)
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func init() {
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osVersion = lazyOSVersion.Get
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packageType = lazyPackageType.Get
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}
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var (
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lazyOSVersion = &lazyAtomicValue[string]{f: ptr.To(osVersionWindows)}
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lazyPackageType = &lazyAtomicValue[string]{f: ptr.To(packageTypeWindows)}
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)
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func osVersionWindows() string {
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major, minor, build := windows.RtlGetNtVersionNumbers()
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s := fmt.Sprintf("%d.%d.%d", major, minor, build)
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// Windows 11 still uses 10 as its major number internally
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if major == 10 {
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if ubr, err := getUBR(); err == nil {
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s += fmt.Sprintf(".%d", ubr)
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}
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}
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return s // "10.0.19041.388", ideally
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}
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// getUBR obtains a fourth version field, the "Update Build Revision",
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// from the registry. This field is only available beginning with Windows 10.
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func getUBR() (uint32, error) {
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key, err := registry.OpenKey(registry.LOCAL_MACHINE,
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`SOFTWARE\Microsoft\Windows NT\CurrentVersion`, registry.QUERY_VALUE|registry.WOW64_64KEY)
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if err != nil {
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return 0, err
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}
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defer key.Close()
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val, valType, err := key.GetIntegerValue("UBR")
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if err != nil {
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return 0, err
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}
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if valType != registry.DWORD {
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return 0, registry.ErrUnexpectedType
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}
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return uint32(val), nil
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}
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func packageTypeWindows() string {
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if _, err := os.Stat(`C:\ProgramData\chocolatey\lib\tailscale`); err == nil {
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return "choco"
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}
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msiSentinel, _ := winutil.GetRegInteger("MSI")
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if msiSentinel == 1 {
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return "msi"
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}
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exe, err := os.Executable()
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if err != nil {
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return ""
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}
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home, _ := os.UserHomeDir()
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if strings.HasPrefix(exe, filepath.Join(home, "scoop", "apps", "tailscale")) {
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return "scoop"
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}
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dir := filepath.Dir(exe)
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nsisUninstaller := filepath.Join(dir, "Uninstall-Tailscale.exe")
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_, err = os.Stat(nsisUninstaller)
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if err == nil {
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return "nsis"
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}
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// Atypical. Not worth trying to detect. Likely open
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// source tailscaled or a developer running by hand.
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return ""
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}
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