| 1 | //go:build windows |
| 2 | |
| 3 | package main |
| 4 | |
| 5 | import ( |
| 6 | "crypto/sha256" |
| 7 | "encoding/hex" |
| 8 | "errors" |
| 9 | "flag" |
| 10 | "fmt" |
| 11 | "io" |
| 12 | "log" |
| 13 | "os" |
| 14 | "path/filepath" |
| 15 | "strings" |
| 16 | "sync" |
| 17 | "syscall" |
| 18 | "time" |
| 19 | |
| 20 | "golang.org/x/sys/windows" |
| 21 | |
| 22 | "reasonix/desktop/internal/winuninstall" |
| 23 | "reasonix/internal/installlayout" |
| 24 | "reasonix/internal/proc" |
| 25 | "reasonix/internal/repair" |
| 26 | ) |
| 27 | |
| 28 | const parentExitTimeout = 2 * time.Minute |
| 29 | |
| 30 | var ( |
| 31 | waitForProcessExitFn = waitForProcessExit |
| 32 | runInstallerFn = runInstaller |
| 33 | startRelaunchFn = startRelaunch |
| 34 | claimPendingFileUpdateFn = repair.ClaimPendingFileUpdateExact |
| 35 | installStagedReleaseUnitFn = installStagedWindowsReleaseUnit |
| 36 | recordInstalledUpdateFn = repair.RecordClaimedFileUpdateInstalled |
| 37 | stageInstallerFn = stageVerifiedInstaller |
| 38 | claimInstallerExecutionFn = claimVerifiedInstallerForExecution |
| 39 | lstatUpdateStagingFn = os.Lstat |
| 40 | reconcileWindowsUninstallRegistrationFn = winuninstall.Reconcile |
| 41 | verifyDesktopHandoffFn = verifyDesktopHandoff |
| 42 | ) |
| 43 | |
| 44 | func main() { |
| 45 | os.Exit(run(os.Args[1:])) |
| 46 | } |
| 47 | |
| 48 | func run(args []string) int { |
| 49 | var parentPID uint |
| 50 | var installer, installerSHA256, installDir, relaunch, toVersion, createdAt, transactionID, installLayout string |
| 51 | fs := flag.NewFlagSet("reasonix-update-helper", flag.ContinueOnError) |
| 52 | fs.SetOutput(os.Stderr) |
| 53 | fs.UintVar(&parentPID, "parent-pid", 0, "Reasonix process id to wait for before installing") |
| 54 | fs.StringVar(&installer, "installer", "", "verified NSIS installer path") |
| 55 | fs.StringVar(&installerSHA256, "installer-sha256", "", "expected SHA-256 of the verified NSIS installer") |
| 56 | fs.StringVar(&installDir, "install-dir", "", "Reasonix installation directory") |
| 57 | fs.StringVar(&relaunch, "relaunch", "", "Reasonix executable to start after the installer succeeds") |
| 58 | fs.StringVar(&toVersion, "to-version", "", "Reasonix version being installed") |
| 59 | fs.StringVar(&createdAt, "created-at", "", "pending update creation timestamp") |
| 60 | fs.StringVar(&transactionID, "transaction-id", "", "complete pending update identity") |
| 61 | fs.StringVar(&installLayout, "install-layout", "", "installation layout contract") |
| 62 | if err := fs.Parse(args); err != nil { |
| 63 | return 2 |
| 64 | } |
| 65 | logger := newLogger() |
| 66 | if installer == "" { |
| 67 | logger.Print("missing --installer") |
| 68 | return 2 |
| 69 | } |
| 70 | if !validSHA256(installerSHA256) { |
| 71 | logger.Print("missing or invalid --installer-sha256") |
| 72 | return 2 |
| 73 | } |
| 74 | if toVersion == "" { |
| 75 | logger.Print("missing --to-version") |
| 76 | return 2 |
| 77 | } |
| 78 | if installLayout != "" && installLayout != installlayout.InstallLayoutVersionedV1 { |
| 79 | logger.Printf("unsupported --install-layout %q", installLayout) |
| 80 | return 2 |
| 81 | } |
| 82 | if installLayout != installlayout.InstallLayoutVersionedV1 && createdAt == "" { |
| 83 | logger.Print("missing --created-at") |
| 84 | return 2 |
| 85 | } |
| 86 | if installLayout != installlayout.InstallLayoutVersionedV1 && transactionID == "" { |
| 87 | logger.Print("missing --transaction-id") |
| 88 | return 2 |
| 89 | } |
| 90 | if installDir == "" { |
| 91 | logger.Print("missing --install-dir") |
| 92 | return 2 |
| 93 | } |
| 94 | if parentPID != 0 { |
| 95 | if err := waitForProcessExitFn(uint32(parentPID), parentExitTimeout); err != nil { |
| 96 | logger.Printf("wait for parent process %d: %v", parentPID, err) |
| 97 | notifyHandoffBlockedFn(false) |
| 98 | return 1 |
| 99 | } |
| 100 | } |
| 101 | if installLayout == installlayout.InstallLayoutVersionedV1 { |
| 102 | return runVersionedWindowsUpdate(logger, installer, installerSHA256, installDir, relaunch, toVersion) |
| 103 | } |
| 104 | recoverExisting := func(reason string) int { |
| 105 | if relaunch != "" { |
| 106 | if relaunchErr := startRelaunchFn(preferRelaunchPath(relaunch, installDir), installDir); relaunchErr != nil { |
| 107 | logger.Printf("relaunch after %s: %v", reason, relaunchErr) |
| 108 | } |
| 109 | } |
| 110 | return 1 |
| 111 | } |
| 112 | // The detached helper runs from the update cache, so a plain |
| 113 | // repair.ReadPendingUpdate would validate the transaction against the cache |
| 114 | // directory and reject every legitimate flat install. Claim through the |
| 115 | // explicit install-local launcher path instead; the repair package validates |
| 116 | // the complete transaction identity and exact release-unit path set while it |
| 117 | // acquires the pending + target locks. |
| 118 | claimTargets := windowsReleaseUnitPaths(installDir) |
| 119 | claimLauncher := filepath.Join(installDir, "reasonix-desktop.exe") |
| 120 | // The old desktop may acquire the pending lock during its normal shutdown. |
| 121 | // Wait for that exact process first, then claim the transaction and hold both |
| 122 | // pending and target locks across the installer replacement window. |
| 123 | claimed, releaseClaim, err := claimPendingFileUpdateFn( |
| 124 | toVersion, |
| 125 | createdAt, |
| 126 | transactionID, |
| 127 | claimLauncher, |
| 128 | claimTargets, |
| 129 | parentExitTimeout, |
| 130 | ) |
| 131 | if err != nil { |
| 132 | logger.Printf("claim pending update: %v", err) |
| 133 | return recoverExisting("pending update claim failure") |
| 134 | } |
| 135 | defer releaseClaim() |
| 136 | recoverUnstarted := func() int { |
| 137 | releaseClaim() |
| 138 | if cancelErr := repair.CancelPendingUpdateExact(claimed); cancelErr != nil { |
| 139 | logger.Printf("cancel unstarted update: %v", cancelErr) |
| 140 | } |
| 141 | if relaunch != "" { |
| 142 | if relaunchErr := startRelaunchFn(preferRelaunchPath(relaunch, installDir), installDir); relaunchErr != nil { |
| 143 | logger.Printf("relaunch after unstarted update failure: %v", relaunchErr) |
| 144 | } |
| 145 | } |
| 146 | return 1 |
| 147 | } |
| 148 | claimedInstaller, cleanupInstaller, err := stageInstallerFn(installer, installerSHA256) |
| 149 | if err != nil { |
| 150 | logger.Printf("bind update installer: %v", err) |
| 151 | return recoverUnstarted() |
| 152 | } |
| 153 | defer func() { |
| 154 | if cleanupErr := cleanupInstaller(); cleanupErr != nil { |
| 155 | logger.Printf("preserving update installer staging: %v", cleanupErr) |
| 156 | } |
| 157 | }() |
| 158 | stagingDir, err := os.MkdirTemp("", "reasonix-update-stage-*") |
| 159 | if err != nil { |
| 160 | logger.Printf("create update staging: %v", err) |
| 161 | return recoverUnstarted() |
| 162 | } |
| 163 | stagingOwner, err := lstatUpdateStagingFn(stagingDir) |
| 164 | if err != nil { |
| 165 | logger.Printf("bind update staging: %v", err) |
| 166 | return recoverUnstarted() |
| 167 | } |
| 168 | defer func() { |
| 169 | if cleanupErr := cleanupOwnedWindowsUpdateDirectory(stagingDir, stagingOwner); cleanupErr != nil { |
| 170 | logger.Printf("preserving update staging: %v", cleanupErr) |
| 171 | } |
| 172 | }() |
| 173 | releaseInstallerExecution, err := claimInstallerExecutionFn(claimedInstaller, installerSHA256) |
| 174 | if err != nil { |
| 175 | logger.Printf("recheck staged installer: %v", err) |
| 176 | return recoverUnstarted() |
| 177 | } |
| 178 | installerErr := runInstallerFn(claimedInstaller, stagingDir) |
| 179 | releaseInstallerExecution() |
| 180 | if installerErr != nil { |
| 181 | logger.Printf("extract installer payload: %v", installerErr) |
| 182 | return recoverUnstarted() |
| 183 | } |
| 184 | publishStarted, receipts, err := installStagedReleaseUnitFn(claimed, stagingDir) |
| 185 | if err != nil { |
| 186 | logger.Printf("publish staged release unit: %v", err) |
| 187 | if !publishStarted { |
| 188 | releaseClaim() |
| 189 | if cancelErr := repair.CancelPendingUpdateExact(claimed); cancelErr != nil { |
| 190 | logger.Printf("cancel unstarted update: %v", cancelErr) |
| 191 | } |
| 192 | } |
| 193 | if relaunch != "" { |
| 194 | if relaunchErr := startRelaunchFn(preferRelaunchPath(relaunch, installDir), installDir); relaunchErr != nil { |
| 195 | logger.Printf("relaunch after publish failure: %v", relaunchErr) |
| 196 | } |
| 197 | } |
| 198 | return 1 |
| 199 | } |
| 200 | if receipts == nil { |
| 201 | // Versioned-v1 activation: no flat publish receipts and no health |
| 202 | // probation. Clear the pending transaction and relaunch the launcher. |
| 203 | releaseClaim() |
| 204 | if cancelErr := repair.CancelPendingUpdateExact(claimed); cancelErr != nil { |
| 205 | logger.Printf("clear pending after versioned activate: %v", cancelErr) |
| 206 | } |
| 207 | if clearErr := repair.ClearUpdateApplyFailureExact(claimed); clearErr != nil { |
| 208 | logger.Printf("clear apply failure after versioned activate: %v", clearErr) |
| 209 | } |
| 210 | } else { |
| 211 | if _, err := recordInstalledUpdateFn(claimed, receipts...); err != nil { |
| 212 | logger.Printf("record installed release unit: %v", err) |
| 213 | if markErr := repair.MarkUpdateApplyFailedExact(claimed, err.Error()); markErr != nil { |
| 214 | logger.Printf("record install failure: %v", markErr) |
| 215 | } |
| 216 | if relaunch != "" { |
| 217 | if relaunchErr := startRelaunchFn(preferRelaunchPath(relaunch, installDir), installDir); relaunchErr != nil { |
| 218 | logger.Printf("relaunch after failed install verification: %v", relaunchErr) |
| 219 | } |
| 220 | } |
| 221 | return 1 |
| 222 | } |
| 223 | if err := repair.ClearUpdateApplyFailureExact(claimed); err != nil { |
| 224 | logger.Printf("clear completed update marker: %v", err) |
| 225 | } |
| 226 | } |
| 227 | return relaunchPublishedInstall(logger, relaunch, installDir, "relaunch") |
| 228 | } |
| 229 | |
| 230 | func runVersionedWindowsUpdate(logger *log.Logger, installer, installerSHA256, installDir, relaunch, toVersion string) int { |
| 231 | recoverExisting := func() int { |
| 232 | if relaunch != "" { |
| 233 | if err := startRelaunchFn(preferRelaunchPath(relaunch, installDir), installDir); err != nil { |
| 234 | logger.Printf("relaunch after versioned update failure: %v", err) |
| 235 | } |
| 236 | } |
| 237 | return 1 |
| 238 | } |
| 239 | if _, err := installlayout.ReadCurrent(installDir); err != nil { |
| 240 | logger.Printf("read versioned install pointer: %v", err) |
| 241 | return recoverExisting() |
| 242 | } |
| 243 | claimedInstaller, cleanupInstaller, err := stageInstallerFn(installer, installerSHA256) |
| 244 | if err != nil { |
| 245 | logger.Printf("bind versioned update installer: %v", err) |
| 246 | return recoverExisting() |
| 247 | } |
| 248 | defer func() { |
| 249 | if cleanupErr := cleanupInstaller(); cleanupErr != nil { |
| 250 | logger.Printf("preserving update installer staging: %v", cleanupErr) |
| 251 | } |
| 252 | }() |
| 253 | stagingDir, err := os.MkdirTemp("", "reasonix-update-stage-*") |
| 254 | if err != nil { |
| 255 | logger.Printf("create versioned update staging: %v", err) |
| 256 | return recoverExisting() |
| 257 | } |
| 258 | stagingOwner, err := lstatUpdateStagingFn(stagingDir) |
| 259 | if err != nil { |
| 260 | logger.Printf("bind versioned update staging: %v", err) |
| 261 | return recoverExisting() |
| 262 | } |
| 263 | defer func() { |
| 264 | if cleanupErr := cleanupOwnedWindowsUpdateDirectory(stagingDir, stagingOwner); cleanupErr != nil { |
| 265 | logger.Printf("preserving update staging: %v", cleanupErr) |
| 266 | } |
| 267 | }() |
| 268 | releaseInstallerExecution, err := claimInstallerExecutionFn(claimedInstaller, installerSHA256) |
| 269 | if err != nil { |
| 270 | logger.Printf("recheck staged versioned installer: %v", err) |
| 271 | return recoverExisting() |
| 272 | } |
| 273 | installerErr := runInstallerFn(claimedInstaller, stagingDir) |
| 274 | releaseInstallerExecution() |
| 275 | if installerErr != nil { |
| 276 | logger.Printf("extract versioned installer payload: %v", installerErr) |
| 277 | return recoverExisting() |
| 278 | } |
| 279 | claimed := &repair.UpdateTransaction{ |
| 280 | SchemaVersion: 1, |
| 281 | ToVersion: toVersion, |
| 282 | TargetKind: "file", |
| 283 | TargetPath: filepath.Join(installDir, "reasonix-desktop.exe"), |
| 284 | } |
| 285 | if err := activateVersionedWindowsFromStaging(claimed, stagingDir); err != nil { |
| 286 | logger.Printf("activate versioned release: %v", err) |
| 287 | return recoverExisting() |
| 288 | } |
| 289 | if _, err := reconcileWindowsUninstallRegistrationFn(installDir, toVersion); err != nil { |
| 290 | // The release is already active and must not be rolled back for stale |
| 291 | // Add/Remove Programs metadata. A later update or full installer retries |
| 292 | // this idempotent reconciliation. |
| 293 | logger.Printf("reconcile Windows uninstall registration: %v", err) |
| 294 | } |
| 295 | return relaunchPublishedInstall(logger, relaunch, installDir, "relaunch versioned release") |
| 296 | } |
| 297 | |
| 298 | func relaunchPublishedInstall(logger *log.Logger, relaunch, installDir, failVerb string) int { |
| 299 | if err := verifyDesktopHandoffFn(installDir, false); err != nil { |
| 300 | logger.Printf("installed; restart incomplete: %v", err) |
| 301 | notifyHandoffBlockedFn(true) |
| 302 | return 1 |
| 303 | } |
| 304 | path := preferRelaunchPath(relaunch, installDir) |
| 305 | if path == "" { |
| 306 | logger.Print("installed; no stable restart target is available") |
| 307 | notifyHandoffBlockedFn(true) |
| 308 | return 1 |
| 309 | } |
| 310 | if err := startRelaunchFn(path, installDir); err != nil { |
| 311 | logger.Printf("%s: %v", failVerb, err) |
| 312 | notifyHandoffBlockedFn(true) |
| 313 | return 1 |
| 314 | } |
| 315 | if err := verifyDesktopHandoffFn(installDir, true); err != nil { |
| 316 | logger.Printf("installed; restart unconfirmed: %v", err) |
| 317 | notifyHandoffBlockedFn(true) |
| 318 | return 1 |
| 319 | } |
| 320 | _ = installlayout.RetainPreviousVersions(installDir, 0) |
| 321 | return 0 |
| 322 | } |
| 323 | |
| 324 | // preferRelaunchPath chooses the install-root launcher after a versioned |
| 325 | // activation. A retained versions/<old>/ desktop path is never restarted. |
| 326 | func preferRelaunchPath(relaunch, installDir string) string { |
| 327 | if path, err := installlayout.StableRelaunchPath(installDir); err == nil && path != "" { |
| 328 | return path |
| 329 | } |
| 330 | if installlayout.IsSupersededVersionedDesktop(installDir, relaunch) { |
| 331 | return "" |
| 332 | } |
| 333 | return relaunch |
| 334 | } |
| 335 | |
| 336 | func validSHA256(value string) bool { |
| 337 | value = strings.TrimSpace(value) |
| 338 | if len(value) != sha256.Size*2 { |
| 339 | return false |
| 340 | } |
| 341 | _, err := hex.DecodeString(value) |
| 342 | return err == nil |
| 343 | } |
| 344 | |
| 345 | func stageVerifiedInstaller(sourcePath, expectedSHA256 string) (string, func() error, error) { |
| 346 | if !validSHA256(expectedSHA256) { |
| 347 | return "", nil, fmt.Errorf("installer SHA-256 is invalid") |
| 348 | } |
| 349 | sourceInfo, err := os.Lstat(sourcePath) |
| 350 | if err != nil { |
| 351 | return "", nil, err |
| 352 | } |
| 353 | if !sourceInfo.Mode().IsRegular() { |
| 354 | return "", nil, fmt.Errorf("installer is not a regular file") |
| 355 | } |
| 356 | dir, err := os.MkdirTemp("", "reasonix-update-installer-*") |
| 357 | if err != nil { |
| 358 | return "", nil, err |
| 359 | } |
| 360 | owner, err := os.Lstat(dir) |
| 361 | if err != nil { |
| 362 | return "", nil, err |
| 363 | } |
| 364 | cleanup := func() error { |
| 365 | return cleanupOwnedWindowsUpdateDirectory(dir, owner) |
| 366 | } |
| 367 | fail := func(err error) (string, func() error, error) { |
| 368 | _ = cleanup() |
| 369 | return "", nil, err |
| 370 | } |
| 371 | source, err := os.Open(sourcePath) |
| 372 | if err != nil { |
| 373 | return fail(err) |
| 374 | } |
| 375 | defer source.Close() |
| 376 | stagedPath := filepath.Join(dir, "reasonix-installer.exe") |
| 377 | staged, err := os.OpenFile(stagedPath, os.O_CREATE|os.O_EXCL|os.O_WRONLY, 0o700) |
| 378 | if err != nil { |
| 379 | return fail(err) |
| 380 | } |
| 381 | hash := sha256.New() |
| 382 | _, copyErr := io.Copy(io.MultiWriter(staged, hash), source) |
| 383 | syncErr := staged.Sync() |
| 384 | closeErr := staged.Close() |
| 385 | switch { |
| 386 | case copyErr != nil: |
| 387 | return fail(copyErr) |
| 388 | case syncErr != nil: |
| 389 | return fail(syncErr) |
| 390 | case closeErr != nil: |
| 391 | return fail(closeErr) |
| 392 | case !strings.EqualFold(hex.EncodeToString(hash.Sum(nil)), strings.TrimSpace(expectedSHA256)): |
| 393 | return fail(fmt.Errorf("installer SHA-256 changed after desktop verification")) |
| 394 | } |
| 395 | if err := verifyInstallerSHA256(stagedPath, expectedSHA256); err != nil { |
| 396 | return fail(err) |
| 397 | } |
| 398 | return stagedPath, cleanup, nil |
| 399 | } |
| 400 | |
| 401 | func verifyInstallerSHA256(path, expectedSHA256 string) error { |
| 402 | info, err := os.Lstat(path) |
| 403 | if err != nil { |
| 404 | return err |
| 405 | } |
| 406 | if !info.Mode().IsRegular() { |
| 407 | return fmt.Errorf("installer is not a regular file") |
| 408 | } |
| 409 | f, err := os.Open(path) |
| 410 | if err != nil { |
| 411 | return err |
| 412 | } |
| 413 | defer f.Close() |
| 414 | hash := sha256.New() |
| 415 | if _, err := io.Copy(hash, f); err != nil { |
| 416 | return err |
| 417 | } |
| 418 | if !strings.EqualFold(hex.EncodeToString(hash.Sum(nil)), strings.TrimSpace(expectedSHA256)) { |
| 419 | return fmt.Errorf("installer SHA-256 mismatch") |
| 420 | } |
| 421 | return nil |
| 422 | } |
| 423 | |
| 424 | func claimVerifiedInstallerForExecution(path, expectedSHA256 string) (func(), error) { |
| 425 | if !validSHA256(expectedSHA256) { |
| 426 | return nil, fmt.Errorf("installer SHA-256 is invalid") |
| 427 | } |
| 428 | pathUTF16, err := windows.UTF16PtrFromString(path) |
| 429 | if err != nil { |
| 430 | return nil, err |
| 431 | } |
| 432 | handle, err := windows.CreateFile( |
| 433 | pathUTF16, |
| 434 | windows.GENERIC_READ, |
| 435 | windows.FILE_SHARE_READ, |
| 436 | nil, |
| 437 | windows.OPEN_EXISTING, |
| 438 | windows.FILE_ATTRIBUTE_NORMAL|windows.FILE_FLAG_SEQUENTIAL_SCAN, |
| 439 | 0, |
| 440 | ) |
| 441 | if err != nil { |
| 442 | return nil, err |
| 443 | } |
| 444 | file := os.NewFile(uintptr(handle), path) |
| 445 | fail := func(err error) (func(), error) { |
| 446 | _ = file.Close() |
| 447 | return nil, err |
| 448 | } |
| 449 | info, err := file.Stat() |
| 450 | if err != nil { |
| 451 | return fail(err) |
| 452 | } |
| 453 | if !info.Mode().IsRegular() { |
| 454 | return fail(fmt.Errorf("installer is not a regular file")) |
| 455 | } |
| 456 | hash := sha256.New() |
| 457 | if _, err := io.Copy(hash, file); err != nil { |
| 458 | return fail(err) |
| 459 | } |
| 460 | if !strings.EqualFold(hex.EncodeToString(hash.Sum(nil)), strings.TrimSpace(expectedSHA256)) { |
| 461 | return fail(fmt.Errorf("installer SHA-256 mismatch")) |
| 462 | } |
| 463 | var once sync.Once |
| 464 | return func() { |
| 465 | once.Do(func() { _ = file.Close() }) |
| 466 | }, nil |
| 467 | } |
| 468 | |
| 469 | func installStagedWindowsReleaseUnit( |
| 470 | claimed *repair.UpdateTransaction, |
| 471 | stagingDir string, |
| 472 | ) (bool, []repair.FileUpdateInstallReceipt, error) { |
| 473 | // v1.20+: versioned-v1 is the only publish path. Incomplete staged payloads |
| 474 | // fail closed without mutating the live install or leaving flat pending state. |
| 475 | if !preferVersionedWindowsActivation(stagingDir) { |
| 476 | return false, nil, fmt.Errorf("staged payload is incomplete for versioned-v1 activation") |
| 477 | } |
| 478 | if err := activateVersionedWindowsFromStaging(claimed, stagingDir); err != nil { |
| 479 | return false, nil, fmt.Errorf("versioned activate: %w", err) |
| 480 | } |
| 481 | return true, nil, nil |
| 482 | } |
| 483 | |
| 484 | func windowsReleaseUnitPaths(installDir string) []string { |
| 485 | if installDir == "" { |
| 486 | return nil |
| 487 | } |
| 488 | names := []string{ |
| 489 | "reasonix-desktop.exe", |
| 490 | "reasonix-guard.exe", |
| 491 | "reasonix-launcher.exe", |
| 492 | "reasonix-update-helper.exe", |
| 493 | "reasonix-cli.exe", |
| 494 | "Reasonix.exe", |
| 495 | } |
| 496 | paths := make([]string, 0, len(names)) |
| 497 | for _, name := range names { |
| 498 | paths = append(paths, filepath.Join(installDir, name)) |
| 499 | } |
| 500 | return paths |
| 501 | } |
| 502 | |
| 503 | func newLogger() *log.Logger { |
| 504 | dir, err := os.UserCacheDir() |
| 505 | if err == nil { |
| 506 | dir = filepath.Join(dir, "Reasonix", "updates") |
| 507 | if err := os.MkdirAll(dir, 0o700); err == nil { |
| 508 | if f, err := os.OpenFile(filepath.Join(dir, "update-helper.log"), os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o600); err == nil { |
| 509 | return log.New(f, "", log.LstdFlags) |
| 510 | } |
| 511 | } |
| 512 | } |
| 513 | return log.New(os.Stderr, "", log.LstdFlags) |
| 514 | } |
| 515 | |
| 516 | func waitForProcessExit(pid uint32, timeout time.Duration) error { |
| 517 | h, err := windows.OpenProcess(windows.SYNCHRONIZE, false, pid) |
| 518 | if err != nil { |
| 519 | if errors.Is(err, windows.ERROR_INVALID_PARAMETER) { |
| 520 | return nil |
| 521 | } |
| 522 | return err |
| 523 | } |
| 524 | defer windows.CloseHandle(h) |
| 525 | waitMS := uint32(timeout / time.Millisecond) |
| 526 | result, err := windows.WaitForSingleObject(h, waitMS) |
| 527 | if err != nil { |
| 528 | return err |
| 529 | } |
| 530 | switch result { |
| 531 | case windows.WAIT_OBJECT_0: |
| 532 | return nil |
| 533 | case uint32(windows.WAIT_TIMEOUT): |
| 534 | return fmt.Errorf("timed out after %s", timeout) |
| 535 | default: |
| 536 | return fmt.Errorf("unexpected wait result %d", result) |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | func runInstaller(installer, installDir string) error { |
| 541 | cmd := proc.VisibleCommand(installer) |
| 542 | // Keep the helper itself hidden, but let the NSIS update-progress window be |
| 543 | // visible. /REASONIXSTAGE makes the signed installer extract only; the helper |
| 544 | // performs every live replacement through the claimed transaction. |
| 545 | cmd.SysProcAttr = &syscall.SysProcAttr{CmdLine: installerCommandLine(installer, installDir)} |
| 546 | return cmd.Run() |
| 547 | } |
| 548 | |
| 549 | func cleanupOwnedWindowsUpdateDirectory(path string, owner os.FileInfo) error { |
| 550 | if path == "" || owner == nil || !owner.IsDir() { |
| 551 | return fmt.Errorf("Windows update cleanup identity is incomplete") |
| 552 | } |
| 553 | for attempt := range 16 { |
| 554 | cleanup := fmt.Sprintf("%s.reasonix-cleanup-%d-%d", path, time.Now().UTC().UnixNano(), attempt) |
| 555 | from, err := windows.UTF16PtrFromString(path) |
| 556 | if err != nil { |
| 557 | return err |
| 558 | } |
| 559 | to, err := windows.UTF16PtrFromString(cleanup) |
| 560 | if err != nil { |
| 561 | return err |
| 562 | } |
| 563 | if err := windows.MoveFileEx(from, to, windows.MOVEFILE_WRITE_THROUGH); err != nil { |
| 564 | if os.IsNotExist(err) { |
| 565 | return nil |
| 566 | } |
| 567 | if os.IsExist(err) { |
| 568 | continue |
| 569 | } |
| 570 | return err |
| 571 | } |
| 572 | actual, err := os.Lstat(cleanup) |
| 573 | if err != nil { |
| 574 | return err |
| 575 | } |
| 576 | if !os.SameFile(owner, actual) { |
| 577 | restoreFrom, fromErr := windows.UTF16PtrFromString(cleanup) |
| 578 | restoreTo, toErr := windows.UTF16PtrFromString(path) |
| 579 | if fromErr != nil || toErr != nil { |
| 580 | return fmt.Errorf("Windows update staging changed before cleanup; preserve replacement at %s", cleanup) |
| 581 | } |
| 582 | if restoreErr := windows.MoveFileEx(restoreFrom, restoreTo, windows.MOVEFILE_WRITE_THROUGH); restoreErr != nil { |
| 583 | return fmt.Errorf("Windows update staging changed before cleanup; preserve replacement at %s: %w", cleanup, restoreErr) |
| 584 | } |
| 585 | return fmt.Errorf("Windows update staging changed before cleanup") |
| 586 | } |
| 587 | return os.RemoveAll(cleanup) |
| 588 | } |
| 589 | return fmt.Errorf("cannot allocate Windows update cleanup path") |
| 590 | } |
| 591 | |
| 592 | func startRelaunch(relaunch, installDir string) error { |
| 593 | cmd := proc.VisibleCommand(relaunch) |
| 594 | cmd.Dir = installDir |
| 595 | cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true} |
| 596 | cmd.Env = append(os.Environ(), "REASONIX_NONINTERACTIVE=1") |
| 597 | return cmd.Start() |
| 598 | } |
| 599 |