file-lastline.ps1 - powershell script by ActiveXperts Software

file-lastline.ps1 checks the last line of a file for a pattern.

Use file-lastline.ps1 directly from ActiveXperts Network Monitor; in the Manager's 'Monitor' menu, select 'New Check (Script)' and select file-lastline.ps1. Configure the required parameter, or press 'Load a working sample'.

In ActiveXperts Network Monitor, Administrators can use three different scripting languages: Powershell, VBScript and SSH.

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file-lastline.ps1 script code

#################################################################################
# ActiveXperts Network Monitor PowerShell script, © ActiveXperts Software B.V.
# For more information about ActiveXperts Network Monitor, visit the ActiveXperts 
# Network Monitor web site at http://www.activexperts.com
#################################################################################
# Script
#     File-LastLine.ps1
# Description:
#     Check last line of a file for a pattern
# Declare Parameters:
#     1) strPath (string) - UNC formatted file path
#     2) strPattern (string) - Search for this pattern in the last line of the file
#     3) strAltCredentials (string, optional) - Specify an empty string to use Metwork Monitor service credentials.
#         To use alternate credentials, enter a server that is defined in Server Credentials table.
#         (To define Server Credentials, choose Tools->Options->Server Credentials)"
# Usage:
#      .\File-LastLine.ps1 '<\\Server\Share\Path>' '<pattern>' '[alt-credentials]'
# Sample:
#      .\File-LastLine.ps1 '\\localhost\c$\windows\windowsupdate.log' 'required'
#################################################################################

# -- Declare Parameters
param( [string]$strPath = '', [string]$strPattern = '', [string]$strAltCredentials = '' )

# -- Use _activexperts.ps1 with common functions
. 'C:\Program Files\ActiveXperts\Network Monitor\Scripts\Monitor (ps1)\_activexperts.ps1' 


#################################################################################
# // --- Main script ---
#################################################################################

# -- Clear screen and clear error
cls
$Error.Clear()

# -- Validate parameters, return on parameter mismatch
if( $strPath -eq '' -or $strPattern -eq '' )
{
  $res = 'UNCERTAIN: Invalid number of parameters - Usage: .\File-LastLine.ps1 "<\\Server\Share\Path>" "<pattern>" "[alt-credentials]"'
  echo $res
  exit
}

# -- Declare local variables by assigning initial value
$strExplanation = ''
$objAltCredentials = $null

# If alternate credentials are specified, retrieve the alternate login and password from the ActiveXperts global settings
if( $strAltCredentials -ne '' )
{
  # Get the Alternate Credentials object. Function "AxGetCredentials" is implemented in "activexperts.ps1"
  if( ( AxGetCredentials $strHost  $strAltCredentials  ([ref]$objAltCredentials) ([ref]$strExplanation) ) -ne $AXSUCCESS )
  {
    echo $strExplanation
    exit
  }
}

$exists = Test-Path $strPath

# -- Checks for the file existence
if( -not $exists )
{
  $res = 'ERROR: File ' + $strPath + ' does not exist.'
  echo $res
  exit
}
  
$content = Get-Content $strPath
$result = $content[-1] -match $strPattern

if( $result -ne 0 )
{
  $res = 'SUCCESS: Pattern[' + $strPattern + '] was found in line [' + ( $content.count -1 ) + '].'
}
else
{
  $res = 'ERROR: Pattern[' + $strPattern + '] was not found in line[' + ($content.count - 1) + '].'
}

# -- Print script result
echo $res
exit


#################################################################################
# // --- Catch script exceptions ---
#################################################################################

trap [Exception]
{
  $res = 'UNCERTAIN: ' + $_.Exception.Message
  echo $res
  exit
}