9a8b16e0d4
- GE Aerospace ASCII banner stays fixed at top of console - Live status line updates (Processing, Cleaned, Failed, etc.) - Live stats counter in header (Cleaned/Failed counts) - Batch file auto-elevates to Administrator via UAC 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
336 lines
12 KiB
PowerShell
336 lines
12 KiB
PowerShell
#Requires -Version 5.1
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<#
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.SYNOPSIS
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eDNC Special Character Fix - Real-time file watcher to strip invalid characters from DNC files.
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.DESCRIPTION
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Monitors a specified folder for DNC program files (.pun, .nc, etc.) and automatically
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removes special characters (0xFF and others) that cause issues with CNC machines.
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Some legacy DNC systems and communication protocols add padding or termination bytes
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that modern CNC controllers cannot process correctly.
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.PARAMETER WatchFolder
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The folder to monitor for DNC files. Default: C:\Dnc_Files\Q
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.PARAMETER FileFilter
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File pattern to watch. Default: *.pun
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.PARAMETER IncludeSubfolders
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Whether to watch subfolders. Default: $true
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.PARAMETER CharactersToRemove
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Array of byte values to strip from files. Default: @(255) for 0xFF
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.EXAMPLE
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.\eDNC-SpecialCharFix.ps1
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Runs with default settings, watching C:\Dnc_Files\Q for *.pun files
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.EXAMPLE
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.\eDNC-SpecialCharFix.ps1 -WatchFolder "D:\DNC\Programs" -FileFilter "*.nc"
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Watches D:\DNC\Programs for .nc files
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.EXAMPLE
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.\eDNC-SpecialCharFix.ps1 -CharactersToRemove @(255, 0, 26)
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Removes 0xFF, NULL, and SUB (Ctrl+Z) characters
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.NOTES
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Author: GE Aerospace - Rutland
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Version: 1.3.0
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Date: 2025-12-12
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v1.3.0 - Fixed header UI:
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- GE Aerospace ASCII banner stays at top
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- Live status updates in header (Processing, Cleaned, Failed)
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- Live stats counter (Cleaned/Failed count)
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- Auto-elevate to Administrator via batch file
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v1.2.0 - Immediate processing:
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- Process file immediately when eDNC releases it (50ms initial delay)
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- Aggressive retry: 100ms -> 200ms -> 400ms -> 800ms (15 attempts)
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- Debouncing to prevent duplicate processing
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- Exclusive file lock for atomic read/write
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Common problematic characters:
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- 0xFF (255) - Padding/fill character
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- 0x00 (0) - NULL character
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- 0x1A (26) - SUB/Ctrl+Z (EOF marker in some systems)
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- 0x7F (127) - DEL character
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#>
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[CmdletBinding()]
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param(
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[Parameter()]
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[string]$WatchFolder = "C:\Dnc_Files\Q",
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[Parameter()]
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[string]$FileFilter = "*.pun",
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[Parameter()]
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[bool]$IncludeSubfolders = $true,
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[Parameter()]
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[int[]]$CharactersToRemove = @(255)
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)
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# Script info
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$ScriptVersion = "1.3.0"
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$ScriptName = "eDNC Special Character Fix"
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# Header display function
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function Show-Header {
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param([int]$Cleaned = 0, [int]$Failed = 0, [string]$Status = "Watching...")
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$headerLines = @(
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""
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" ____ ____ "
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" / ___|| ___| / \ ___ _ __ ___ ___ _ __ __ _ ___ ___ "
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"| | _ | _| / _ \ / _ \ '__/ _ \/ __| '_ \ / _`` |/ __/ _ \"
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"| |_| || |___ / ___ \ __/ | | (_) \__ \ |_) | (_| | (_| __/"
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" \____||_____| /_/ \_\___|_| \___/|___/ .__/ \__,_|\___\___|"
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" |_| "
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""
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" $ScriptName"
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" by Cam P. | v$ScriptVersion"
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""
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" Folder: $WatchFolder"
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" Filter: $FileFilter | Cleaned: $Cleaned | Failed: $Failed"
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""
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" Status: $Status"
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"================================================================"
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)
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# Save cursor, go to top, draw header
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[Console]::SetCursorPosition(0, 0)
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for ($i = 0; $i -lt $headerLines.Count; $i++) {
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$line = $headerLines[$i]
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# Clear line and write
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Write-Host ("`r" + $line.PadRight([Console]::WindowWidth - 1)) -NoNewline
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# Apply colors
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[Console]::SetCursorPosition(0, $i)
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if ($i -ge 1 -and $i -le 6) {
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Write-Host $line -ForegroundColor Cyan
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} elseif ($i -eq 8) {
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Write-Host $line -ForegroundColor White
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} elseif ($i -eq 9) {
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Write-Host $line -ForegroundColor Gray
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} elseif ($i -eq 14) {
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if ($Status -like "*ERROR*" -or $Status -like "*FAILED*") {
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Write-Host $line -ForegroundColor Red
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} elseif ($Status -like "*CLEANED*") {
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Write-Host $line -ForegroundColor Green
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} else {
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Write-Host $line -ForegroundColor Yellow
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}
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} elseif ($i -eq 15) {
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Write-Host $line -ForegroundColor DarkGray
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} else {
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Write-Host $line
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}
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}
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return $headerLines.Count
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}
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# Initialize console
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Clear-Host
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$script:HeaderHeight = Show-Header -Status "Initializing..."
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# Validate watch folder exists
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if (-not (Test-Path $WatchFolder)) {
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Show-Header -Status "ERROR: Watch folder does not exist!"
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[Console]::SetCursorPosition(0, $script:HeaderHeight + 1)
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Write-Host "Please create the folder or specify a different path." -ForegroundColor Yellow
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exit 1
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}
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# Update header with ready status
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Show-Header -Status "Watching for files... (Ctrl+C to stop)" | Out-Null
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[Console]::SetCursorPosition(0, $script:HeaderHeight + 1)
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Write-Host "Removing bytes: $($CharactersToRemove -join ', ') (0x$($CharactersToRemove | ForEach-Object { '{0:X2}' -f $_ } | Join-String -Separator ', 0x'))" -ForegroundColor DarkGray
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Write-Host ""
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# Statistics
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$script:FilesProcessed = 0
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$script:BytesRemoved = 0
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$script:FailedFiles = 0
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# Debounce tracking - prevent processing same file multiple times
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$script:RecentlyProcessed = @{}
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$script:DebounceSeconds = 5
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# Create file system watcher
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$watcher = New-Object System.IO.FileSystemWatcher
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$watcher.Path = $WatchFolder
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$watcher.Filter = $FileFilter
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$watcher.IncludeSubdirectories = $IncludeSubfolders
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$watcher.EnableRaisingEvents = $true
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# Define the cleanup action
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$action = {
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$path = $Event.SourceEventArgs.FullPath
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$changeType = $Event.SourceEventArgs.ChangeType
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$fileName = Split-Path $path -Leaf
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# Get parameters from message data
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$charsToRemove = $Event.MessageData.CharsToRemove
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$debounceSeconds = $Event.MessageData.DebounceSeconds
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$statusLine = $Event.MessageData.StatusLine
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# Helper to update status line in header
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$updateStatus = {
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param($msg, $color = "Yellow")
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$savedPos = [Console]::CursorTop
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[Console]::SetCursorPosition(0, $statusLine)
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Write-Host (" Status: " + $msg).PadRight([Console]::WindowWidth - 1) -ForegroundColor $color
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[Console]::SetCursorPosition(0, $savedPos)
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}
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# Helper to update stats line in header
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$updateStats = {
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$savedPos = [Console]::CursorTop
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[Console]::SetCursorPosition(0, 12)
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Write-Host (" Filter: $($Event.MessageData.FileFilter) | Cleaned: $($script:FilesProcessed) | Failed: $($script:FailedFiles)").PadRight([Console]::WindowWidth - 1) -ForegroundColor White
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[Console]::SetCursorPosition(0, $savedPos)
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}
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# Debounce check - skip if we processed this file recently
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$now = Get-Date
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if ($script:RecentlyProcessed.ContainsKey($path)) {
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$lastProcessed = $script:RecentlyProcessed[$path]
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if (($now - $lastProcessed).TotalSeconds -lt $debounceSeconds) {
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return # Skip duplicate event
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}
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}
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& $updateStatus "Processing: $fileName" "Yellow"
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Write-Host "$(Get-Date -Format 'yyyy-MM-dd HH:mm:ss') | $changeType | $fileName" -ForegroundColor White
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# Brief initial delay to let eDNC finish (50ms)
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Start-Sleep -Milliseconds 50
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# Try to acquire exclusive access - process immediately when available
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$maxRetries = 15
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$retryCount = 0
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$baseDelay = 100 # Start with 100ms, doubles each retry (100, 200, 400, 800...)
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while ($retryCount -lt $maxRetries) {
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$fileStream = $null
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try {
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# Try to open file with exclusive access - this confirms it's available
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$fileStream = [System.IO.File]::Open(
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$path,
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[System.IO.FileMode]::Open,
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[System.IO.FileAccess]::ReadWrite,
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[System.IO.FileShare]::None
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)
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# Read all bytes while we have exclusive lock
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$fileStream.Position = 0
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$bytes = New-Object byte[] $fileStream.Length
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$null = $fileStream.Read($bytes, 0, $bytes.Length)
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$originalCount = $bytes.Length
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# Remove specified bytes
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$cleaned = [System.Collections.Generic.List[byte]]::new()
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foreach ($b in $bytes) {
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if ($b -notin $charsToRemove) {
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$cleaned.Add($b)
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}
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}
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$newCount = $cleaned.Count
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# Only rewrite if we found characters to remove
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if ($originalCount -ne $newCount) {
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# Truncate and rewrite
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$fileStream.Position = 0
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$fileStream.SetLength(0)
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$cleanedArray = $cleaned.ToArray()
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$fileStream.Write($cleanedArray, 0, $cleanedArray.Length)
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$fileStream.Flush()
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$removed = $originalCount - $newCount
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Write-Host " [CLEANED] Removed $removed byte(s)" -ForegroundColor Green
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$script:FilesProcessed++
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$script:BytesRemoved += $removed
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& $updateStatus "CLEANED: $fileName ($removed bytes)" "Green"
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& $updateStats
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} else {
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Write-Host " [OK] No special characters found" -ForegroundColor Gray
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& $updateStatus "OK: $fileName (no changes)" "Gray"
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}
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# Mark as recently processed
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$script:RecentlyProcessed[$path] = Get-Date
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break
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}
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catch [System.IO.IOException] {
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$retryCount++
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if ($retryCount -lt $maxRetries) {
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# Exponential backoff: 100ms, 200ms, 400ms, 800ms...
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$delay = [math]::Min($baseDelay * [math]::Pow(2, $retryCount - 1), 16000)
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Write-Host " [RETRY] File locked, waiting $([math]::Round($delay/1000, 1))s... ($retryCount/$maxRetries)" -ForegroundColor Yellow
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& $updateStatus "RETRY: $fileName ($retryCount/$maxRetries)" "Yellow"
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Start-Sleep -Milliseconds $delay
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} else {
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Write-Host " [FAILED] Could not access file after $maxRetries attempts" -ForegroundColor Red
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$script:FailedFiles++
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& $updateStatus "FAILED: $fileName" "Red"
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& $updateStats
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}
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}
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catch {
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Write-Host " [ERROR] $($_.Exception.Message)" -ForegroundColor Red
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$script:FailedFiles++
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& $updateStatus "ERROR: $fileName" "Red"
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& $updateStats
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break
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}
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finally {
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if ($fileStream) {
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$fileStream.Close()
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$fileStream.Dispose()
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}
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}
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}
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}
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# Create message data object to pass parameters to the action
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$messageData = @{
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CharsToRemove = $CharactersToRemove
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DebounceSeconds = $script:DebounceSeconds
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StatusLine = 14 # Line number for status updates
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FileFilter = $FileFilter
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}
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# Register event handlers
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$null = Register-ObjectEvent -InputObject $watcher -EventName Created -Action $action -MessageData $messageData
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$null = Register-ObjectEvent -InputObject $watcher -EventName Changed -Action $action -MessageData $messageData
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# Keep script running
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try {
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while ($true) {
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Start-Sleep -Seconds 1
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}
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}
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finally {
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# Cleanup on exit
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$watcher.EnableRaisingEvents = $false
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$watcher.Dispose()
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Get-EventSubscriber | Unregister-Event
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Write-Host ""
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Write-Host "========================================" -ForegroundColor Cyan
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Write-Host " Session Summary" -ForegroundColor Cyan
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Write-Host "========================================" -ForegroundColor Cyan
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Write-Host " Files Cleaned: $script:FilesProcessed"
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Write-Host " Bytes Removed: $script:BytesRemoved"
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if ($script:FailedFiles -gt 0) {
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Write-Host " Failed Files: $script:FailedFiles" -ForegroundColor Red
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}
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Write-Host ""
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Write-Host "Stopped watching folder" -ForegroundColor Yellow
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}
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