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53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build windows
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// Package winuntil contains misc Windows/win32 helper functions.
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package winutil
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import (
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"log"
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"golang.org/x/sys/windows"
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"golang.org/x/sys/windows/registry"
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)
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const RegBase = `SOFTWARE\Tailscale IPN`
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// GetDesktopPID searches the PID of the process that's running the
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// currently active desktop and whether it was found.
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// Usually the PID will be for explorer.exe.
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func GetDesktopPID() (pid uint32, ok bool) {
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hwnd := windows.GetShellWindow()
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if hwnd == 0 {
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return 0, false
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}
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windows.GetWindowThreadProcessId(hwnd, &pid)
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return pid, pid != 0
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}
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// GetRegString looks up a registry path in our local machine path, or returns
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// the given default if it can't.
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//
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// This function will only work on GOOS=windows. Trying to run it on any other
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// OS will always return the default value.
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func GetRegString(name, defval string) string {
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key, err := registry.OpenKey(registry.LOCAL_MACHINE, RegBase, registry.READ)
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if err != nil {
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log.Printf("registry.OpenKey(%v): %v", RegBase, err)
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return defval
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}
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defer key.Close()
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val, _, err := key.GetStringValue(name)
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if err != nil {
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if err != registry.ErrNotExist {
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log.Printf("registry.GetStringValue(%v): %v", name, err)
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}
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return defval
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}
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return val
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}
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