{"record":{"id":"76c4911a4aad43f1","repo":"chenhg5/cc-connect","slug":"chmod-task-script-w","errorCode":null,"errorMessage":"chmod task script: %w","messagePattern":"chmod task script: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"daemon/windows.go","lineNumber":61,"sourceCode":"\tif err := os.MkdirAll(DefaultDataDir(), 0755); err != nil {\n\t\treturn fmt.Errorf(\"create data dir: %w\", err)\n\t}\n\tif err := os.MkdirAll(filepath.Dir(cfg.LogFile), 0755); err != nil {\n\t\treturn fmt.Errorf(\"create log dir: %w\", err)\n\t}\n\n\tscriptPath := windowsTaskScriptPath()\n\t// 0644 has weak semantics on Windows; the file ACL is what matters.\n\t// We still write 0600 so the file's POSIX bits do not advertise read\n\t// access, and rely on the user's own profile ACLs for primary defense\n\t// (the script lives under %USERPROFILE%\\.cc-connect by default).\n\t// WriteFile only applies perm on create, so Chmod the existing file\n\t// after writing to harden reinstalls of pre-existing 0644 scripts.\n\tif err := os.WriteFile(scriptPath, []byte(buildWindowsTaskScript(cfg)), 0600); err != nil {\n\t\treturn fmt.Errorf(\"write task script: %w\", err)\n\t}\n\tif err := os.Chmod(scriptPath, 0600); err != nil {\n\t\treturn fmt.Errorf(\"chmod task script: %w\", err)\n\t}\n\n\tif err := stopWindowsTask(); err != nil {\n\t\tslog.Warn(\"schtasks: stop existing task failed\", \"error\", err)\n\t}\n\tif err := deleteWindowsTask(); err != nil {\n\t\tif windowsTaskMatchesAction(scriptPath) {\n\t\t\tif err := m.Start(); err != nil {\n\t\t\t\treturn fmt.Errorf(\"start existing task: %w\", err)\n\t\t\t}\n\t\t\treturn nil\n\t\t}\n\t\treturn err\n\t}\n\n\tif err := createWindowsTask(scriptPath); err != nil {\n\t\treturn err\n\t}","sourceCodeStart":43,"sourceCodeEnd":79,"githubUrl":"https://github.com/chenhg5/cc-connect/blob/4000b2338aa6e850c99df54f8b0ed6ed7460b401/daemon/windows.go#L43-L79","documentation":"Immediately after writing the task script, schtasksManager.Install calls os.Chmod(scriptPath, 0600) to harden reinstalls (WriteFile only applies perm on create, so pre-existing wider-permission files must be tightened); failure is wrapped as \"chmod task script: %w\". The script exists and was written, but its permissions could not be narrowed to owner-only.","triggerScenarios":"`cc-connect daemon install` when os.Chmod on the freshly written script fails — file locked with a sharing conflict, ACL prevents the owner from changing attributes, or the file sits on a filesystem where POSIX perm bits are not honored and the syscall errors.","commonSituations":"Reinstalling while the previously registered scheduled task is running and holds the script open; the script inherits deny-ACLs from a hardened folder; unusual volumes (some network mounts, WSL-mounted paths) rejecting chmod semantics.","solutions":["Check the wrapped cause; if the file is in use, stop/delete the old scheduled task (`schtasks /end` / `schtasks /delete`) then rerun install","Fix ACLs on the data directory so the current user has full control (`icacls %USERPROFILE%\\.cc-connect /grant \"%USERNAME%:(OI)(CI)F\"`)","Remove the stale script (`del <script>`) so it is recreated fresh at 0600 by WriteFile","If on a filesystem without POSIX permission support, relocate DefaultDataDir to a local NTFS path"],"exampleFix":"// before\n$ cc-connect daemon install\n// error: chmod task script: chmod ...: Access is denied.\n// after\n> schtasks /end /tn \"cc-connect\"\n> schtasks /delete /tn \"cc-connect\" /f\n> del %USERPROFILE%\\.cc-connect\\cc-connect-task.ps1\n> cc-connect daemon install","handlingStrategy":"validation","validationCode":"scriptPath := filepath.Join(os.Getenv(\"USERPROFILE\"), \".cc-connect\", \"cc-connect-task.ps1\")\nif info, err := os.Stat(scriptPath); err == nil {\n    if info.Mode().Perm()&0o077 != 0 {\n        if err := os.Chmod(scriptPath, 0o600); err != nil {\n            log.Fatalf(\"cannot tighten perms on %s (%v); delete the file or stop the running task first\", scriptPath, err)\n        }\n    }\n}","typeGuard":null,"tryCatchPattern":"if err := daemon.Install(cfg); err != nil && strings.Contains(err.Error(), \"chmod task script\") {\n    os.Remove(windowsTaskScriptPath()) // recreate fresh at 0600\n    return daemon.Install(cfg)\n}","preventionTips":["Delete stale task scripts before reinstalling so WriteFile recreates them at 0600 instead of chmod-ing an old file","Ensure the current user has full control (icacls) over %USERPROFILE%\\.cc-connect so attribute changes succeed","End/delete the existing scheduled task before upgrade so it does not hold the script open","Keep the data directory on local NTFS rather than mounts without POSIX permission semantics"],"tags":["windows","filesystem","chmod","permissions","daemon"],"backgroundTag":"file-write-permission-denied","analyzedSha":"4000b2338aa6e850c99df54f8b0ed6ed7460b401","analyzedAt":"2026-09-06T11:45:09.575Z","contentChangedAt":"2026-09-06T11:45:09.575Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}