104 lines
3.1 KiB
PowerShell
104 lines
3.1 KiB
PowerShell
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Param(
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[string] $display,
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[switch] $noEchoBack,
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[string] $mask,
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[switch] $keyIn,
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[switch] $encoded
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)
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$ErrorActionPreference = 'Stop' # for cmdlet
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trap {
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# `throw $_` and `Write-Error $_` return exit-code 0
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$Host.UI.WriteErrorLine($_)
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exit 1
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}
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function decodeDOS ($arg) {
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[Regex]::Replace($arg, '#(\d+);', { [char][int] $args[0].Groups[1].Value })
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}
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$options = @{}
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foreach ($arg in @('display', 'noEchoBack', 'mask', 'keyIn', 'encoded')) {
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$options.Add($arg, (Get-Variable $arg -ValueOnly))
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}
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if ($options.encoded) {
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$argList = New-Object string[] $options.Keys.Count
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$options.Keys.CopyTo($argList, 0);
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foreach ($arg in $argList) {
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if (($options[$arg] -is [string]) -and ($options[$arg] -ne ''))
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{ $options[$arg] = decodeDOS $options[$arg] }
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}
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}
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[string] $inputTTY = ''
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[bool] $isInputLine = $False
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[bool] $isEditable = (-not $options.noEchoBack) -and (-not $options.keyIn)
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function writeTTY ($text) {
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execWithTTY ('Write-Host ''' + ($text -replace '''', '''''') + ''' -NoNewline')
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$script:isInputLine = $True
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}
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# Instant method that opens TTY without CreateFile via P/Invoke in .NET Framework
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# **NOTE** Don't include special characters of DOS in $command when $getRes is True.
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function execWithTTY ($command, $getRes = $False) {
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if ($getRes) {
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$res = (cmd.exe /C "<CON powershell.exe -Command $command")
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if ($LastExitCode -ne 0) { exit 1 }
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} else {
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$command | cmd.exe /C ">CON powershell.exe -Command -"
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if ($LastExitCode -ne 0) { exit 1 }
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$res = ''
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}
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return $res
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}
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if ($options.display -ne '') {
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writeTTY $options.display
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$options.display = ''
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}
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if ($options.noEchoBack -and (-not $options.keyIn) -and ($options.mask -eq '*')) {
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$inputTTY = execWithTTY ('$inputTTY = Read-Host -AsSecureString;' +
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'$bstr = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($inputTTY);' +
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'[System.Runtime.InteropServices.Marshal]::PtrToStringAuto($bstr)') $True
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return '''' + $inputTTY + ''''
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}
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if ($options.keyIn) { $reqSize = 1 }
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else { $reqSize = 1024 } # dummy
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while ($True) {
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if ($isEditable) {
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$chunk = execWithTTY 'Read-Host' $True
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$chunk += "`n"
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} else { # raw
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$chunk = execWithTTY '[System.Console]::ReadKey($True).KeyChar' $True
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}
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if ($chunk -eq '') { break }
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# other ctrl-chars
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$chunk = $chunk -replace '[\x00-\x08\x0b\x0c\x0e-\x1f\x7f]', ''
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if ($chunk -eq '') { continue }
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if (-not $isEditable) {
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$displayTmp = $chunk -replace '[\r\n]', ''
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if ($displayTmp -ne '') {
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if ($options.noEchoBack) {
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if ($options.mask -eq '') { $displayTmp = '' }
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else { $displayTmp = $options.mask * $displayTmp.Length }
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}
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if ($displayTmp -ne '') { writeTTY $displayTmp }
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}
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}
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$inputTTY += $chunk
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if (($inputTTY -match '[\r\n]$') -or
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($options.keyIn -and ($inputTTY.Length -ge $reqSize))) { break }
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}
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if ((-not $isEditable) -and (-not ($options.keyIn -and (-not $isInputLine))))
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{ execWithTTY 'Write-Host ''''' } # new line
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return '''' + $inputTTY + ''''
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