Add check-admin.ps1

Scripts/check-admin.ps1

@@ -0,0 +1,33 @@
+<#
+.SYNOPSIS
+        Check for admin rights
+.DESCRIPTION
+        This PowerShell script checks if the user has administrator rights.
+.EXAMPLE
+        PS> ./check-admin.ps1
+        ✅ Yes
+.LINK
+        https://github.com/fleschutz/PowerShell
+.NOTES
+        Author: Markus Fleschutz | License: CC0
+#>
+
+try {
+	if ($IsLinux) {
+		# todo
+	} else {
+		$user = [Security.Principal.WindowsIdentity]::GetCurrent()
+		$principal = (New-Object Security.Principal.WindowsPrincipal $user)
+		if ($principal.IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator)) {
+			"✅ Yes"
+		} elseif ($principal.IsInRole([Security.Principal.WindowsBuiltinRole]::Guest)) {
+			"⚠️ No, guest rights only"
+		} else {
+			"⚠️ No, normal user rights only"
+		}
+	}  
+        exit 0 # success
+} catch {
+        "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+        exit 1
+}