Added check-ipv4-address.ps1 and check-mac-address.ps1

Scripts/check-xml-file.ps1

@@ -0,0 +1,41 @@
+#!/snap/bin/powershell
+
+# Syntax:       ./check-xml-file [<file>]
+# Description:	checks the given XML file for validity
+# Author:	Markus Fleschutz
+# Source:	github.com/fleschutz/PowerShell
+# License:	CC0
+
+param ([String]$XmlFilePath)
+
+try {
+	if ($XmlFilePath -eq "" ) {
+		$XmlFilePath = read-host "Enter path to XML file"
+	}
+	# Get the file
+	$XmlFile = Get-Item($XmlFilePath)
+	
+	# Keep count of how many errors there are in the XML file
+	$script:ErrorCount = 0
+	
+	# Perform the XSD Validation
+	$ReaderSettings = New-Object -TypeName System.Xml.XmlReaderSettings
+	$ReaderSettings.ValidationType = [System.Xml.ValidationType]::Schema
+	$ReaderSettings.ValidationFlags = [System.Xml.Schema.XmlSchemaValidationFlags]::ProcessInlineSchema -bor [System.Xml.Schema.XmlSchemaValidationFlags]::ProcessSchemaLocation
+	$ReaderSettings.add_ValidationEventHandler({ $script:ErrorCount++ })
+	$Reader = [System.Xml.XmlReader]::Create($XmlFile.FullName, $ReaderSettings)
+	while ($Reader.Read()) { }
+	$Reader.Close()
+	
+	# Verify the results of the XSD validation
+	if ($script:ErrorCount -gt 0) {
+		write-output "XML file is NOT valid"
+		exit 1
+	} else {
+		write-output "XML file is valid"
+		exit 0
+	}
+} catch {
+	write-warning "$($MyInvocation.MyCommand.Name) - Error: $($_.Exception.Message) - Line Number: $($_.InvocationInfo.ScriptLineNumber)"
+	exit 1
+}