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e561f1ce61
When updating via c2n, `tailscale.exe update` runs from `tailscaled.exe`
which runs as SYSTEM. The MSI installer does not start the GUI when
running as SYSTEM. This results in Tailscale just existing on
auto-update, which is ungood.
Instead, always ask the MSI installer to not launch the GUI (via
`TS_NOLAUNCH` argument) and launch it manually with a token from the
current logged in user. The token code was borrowed from
d9081d6ba2/net/dns/wsl_windows.go (L207-L232)
Also, make some logging changes so that these issues are easier to debug
in the future.
Updates #755
Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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// Windows-specific stuff that can't go in clientupdate.go because it needs
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// x/sys/windows.
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package clientupdate
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import (
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"os/exec"
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"os/user"
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"path/filepath"
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"syscall"
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"golang.org/x/sys/windows"
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"tailscale.com/util/winutil"
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"tailscale.com/util/winutil/authenticode"
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)
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func init() {
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markTempFileFunc = markTempFileWindows
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verifyAuthenticode = verifyTailscale
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launchTailscaleAsWinGUIUser = launchTailscaleAsGUIUser
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}
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func markTempFileWindows(name string) error {
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name16 := windows.StringToUTF16Ptr(name)
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return windows.MoveFileEx(name16, nil, windows.MOVEFILE_DELAY_UNTIL_REBOOT)
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}
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const certSubjectTailscale = "Tailscale Inc."
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func verifyTailscale(path string) error {
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return authenticode.Verify(path, certSubjectTailscale)
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}
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func launchTailscaleAsGUIUser(exePath string) error {
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exePath = filepath.Join(filepath.Dir(exePath), "tailscale-ipn.exe")
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var token windows.Token
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if u, err := user.Current(); err == nil && u.Name == "SYSTEM" {
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sessionID := winutil.WTSGetActiveConsoleSessionId()
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if sessionID != 0xFFFFFFFF {
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if err := windows.WTSQueryUserToken(sessionID, &token); err != nil {
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return err
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}
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defer token.Close()
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}
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}
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cmd := exec.Command(exePath)
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cmd.SysProcAttr = &syscall.SysProcAttr{
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Token: syscall.Token(token),
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HideWindow: true,
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}
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return cmd.Start()
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}
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