Collection of useful powershell snippets

filesplit.ps1

#Usage filesplit.ps1 <filename> <# of lines>

Param(
    [parameter(mandatory=$true,position=0)][string]$filename,
    [parameter(position=1)][string]$linesperFile = 100000
)
$sw = new-object System.Diagnostics.Stopwatch
$sw.Start()
$rootName = (join-path ([io.fileinfo]$filename).directoryname ([io.fileinfo]$filename).basename) + '_'
$ext = ([io.fileinfo]$filename).extension
$header = get-content $filename -first 1
$filecount = 0
$reader = $null
try {
    $reader = [io.file]::OpenText($filename)
    try {
        $filecount++
        $linecount = 0
        "Creating file number $filecount"
        $writer = [io.file]::CreateText("{0}{1}{2}" -f ($rootName,$filecount.ToString("000"),$ext))

        while($reader.EndOfStream -ne $true) {
            "Reading $linesperFile lines"
            if($filecount -gt 1){$writer.WriteLine($header)}
            while( ($linecount -lt $linesperFile) -and ($reader.EndOfStream -ne $true)) {
                $writer.WriteLine($reader.ReadLine());
                $linecount++
            }

            if($reader.EndOfStream -ne $true) {
                "Closing file"
                $writer.Dispose();

                $filecount++
                $linecount = 0
                "Creating file number $filecount"
                $writer = [io.file]::CreateText("{0}{1}{2}" -f ($rootName,$filecount.ToString("000"),$ext))
            }
        }
    } finally {
        $writer.Dispose();
    }
} finally {
    $reader.Dispose();
}
$sw.Stop()

Write-Host "Split complete in " $sw.Elapsed.TotalSeconds "seconds"

screen.ps1

# Sends PrintScreen every 60 seconds

[void] [System.Reflection.Assembly]::LoadWithPartialName("'System.Windows.Forms")

While ($true) {
    [System.Windows.Forms.SendKeys]::SendWait("{PRTSC}")
    Start-Sleep -s 30
}

userpic.ps1

# Used to publish new user photo to GAL

param (
  [string]$sid = $(throw "-sid is required"),
  [string]$photo = $(throw "-photo is required")
)
$ErrorActionPreference = "stop"

$root = [adsi]''
$searcher = New-Object System.DirectoryServices.DirectorySearcher($root)
$searcher.Filter = "(mail=$($sid)*)"
$users = $searcher.FindAll()
if($users.Count -eq 0){
  throw "No matching user found"
} elseif($users.Count -eq 1){
  $user = $users[0].GetDirectoryEntry()
} else{
  $i = 1
  foreach($user in $users){
    Write-Host "$i : $($user.Path)"
    $i += 1
  }

  $pick = Read-Host "Which user?"
  $user = $users[$pick - 1].GetDirectoryEntry()
}

$file = [byte[]](Get-Content $photo -Encoding Byte)

$user.Properties["thumbnailPhoto"].Clear()
$user.Properties["thumbnailPhoto"].Add($file)

$user.commitChanges()