# Nagios Windows Server Backup Monitoring Script
# Author: Sebastian van de Meer
# Version 0.3
# www.kernel-error.de
# ----------------------------------------
# Compatibility:
# ----------------------------------------
# Nagios Version: 3.x
# >= Windows Server 2008
# Powershell Version: 2.0
# NSClient++ Version: 3.x
# ----------------------------------------

if ((Get-PSSnapin -Name Windows.ServerBackup -ErrorAction SilentlyContinue) -eq $null )
  {
    Add-PsSnapin Windows.ServerBackup -ErrorAction SilentlyContinue   
  }

try
  {
    $WBstatus = Get-WBSummary
  }
  catch
  {
    write-host CRITICAL: Die Befehlszeilentools fuer Windows Server Backup sind nicht installiert.
    $host.SetShouldExit(2)
  }

$lastOKbackup = $WBstatus.LastSuccessfulBackupTime

$datetmp = Get-Date

$backup = ($lastOKbackup).adddays(3)

$OPstatus = $WBstatus.CurrentOperationStatus

if ($datetmp.day -le $lastOKbackup.day+1)
  {
    if ($datetmp.day -eq $lastOKbackup.day+1)
    {
      write-host OK: Backup von gestern
      $host.SetShouldExit(0)
    }
    else
    {
      write-host OK: Backup von heute
      $host.SetShouldExit(0)
    }
}
  else
  {
    if ($backup -ge $datetmp)
      {
	if ($OPstatus -eq "BackupInProgress")
	  {
	    write-host OK: Backup laeuft gerade
	    $host.SetShouldExit(0)
	  }
	  else
	  {
	    write-host WARNING: Backup OK aber nicht aktuell
	    $host.SetShouldExit(1)	
	  }
      }
      else
      {
	write-host CRITICAL: Backup aelter als 3 Tage
	$host.SetShouldExit(2)	
      }
   }