a small watchdog for PowerShell

watchdog.ps1

# Before first PowerShell usage you might have to adapt the policies
# Get-ExecutionPolicy -List
# Set-ExecutionPolicy Unrestricted -Scope CurrentUser
# --------------------------------------------------------------------------------
# This setup is only necessary once
# Insert the password into the empty string below and run script 
# powershell creates a text file with the (encrypted credentials, Windows Data Protection API)
# then the watchdog acesses it...

#$secureStringPwd = "test" | ConvertTo-SecureString -AsPlainText -Force 
#$secureStringText = $secureStringPwd | ConvertFrom-SecureString 
#Set-Content "Mailkey.txt" $secureStringText
#exit
# --------------------------------------------------------------------------------


# define process to watch
$processToCheck = "R2CH"
$process = (Get-Process -name $processToCheck -ErrorAction SilentlyContinue) -eq $null

# get the lacros gmail password
$username = 'sender@gmail.com'
$securePwd = Get-Content "Mailkey.txt" | ConvertTo-SecureString 
$credObject = New-Object System.Management.Automation.PSCredential -ArgumentList $username, $securePwd

# setup the mail object
$smtpClient = new-object system.net.mail.smtpClient 
$smtpClient.Host = 'smtp.gmail.com'
$smtpClient.Port = 587
$smtpClient.EnableSsl = $true
# alternative get credential $SMTPClient.Credentials = New-Object System.Net.NetworkCredential("username", "password"); 
#$smtpClient.Credentials = [Net.NetworkCredential]($pwdTxt | ConvertTo-SecureString)
$smtpClient.Credentials = $credObject

$sendmail = $false
$outputtext = ''
If (!($process)) {
    #Write-Output (Get-Process -name $processToCheck)
    $outputtext = "Process is running`r`n"

    $netstat_res = netstat -an | find ":7000   "
    $netstat_res = ($netstat_res -split '\n')[0]
    #Write-Output ($netstat_res).Contains("172.23.159.100")

    IF (($netstat_res).contains("192.168.0.11")) {
        If (($netstat_res).contains("LISTENING")) {
            $outputtext =  $outputtext + "Running on correct port and listening`r`n" + $netstat_res
        } elseif (($netstat_res).contains("ESTABLISHED")) {
            $outputtext =  $outputtext + "Running on correct port and connected`r`n" + $netstat_res
        }

    } elseif (($netstat_res).contains("192.168.0.10")) {
        $outputtext = $outputtext + "but on a wrong port`r`n" + $netstat_res
        $sendmail = $true
    }
} else {
    #Start-Process $processToCheck
    $outputtext = "Process not running"
    $sendmail = $true

}

#$sendmail = $true
if ($sendmail) {
    # send mail
    $emailMessage = New-Object System.Net.Mail.MailMessage
    $emailMessage.From = $username
    $emailMessage.To.Add('recipient1')
    $emailMessage.To.Add('recipient2')
    $emailMessage.Subject = 'watchdog'
    $emailMessage.Body = $outputtext
    $smtpClient.Send( $emailMessage )

    #$smtpClient.Send($username,'radenz@tropos.de','watchdog', $outputtext)
}

Write-Output ("send mail " + $sendmail)
Write-Output $outputtext