From 43eb1283db51b5ca6fd8cc52023cdd18e6106531 Mon Sep 17 00:00:00 2001
From: Markus Fleschutz <markus@fleschutz.de>
Date: Wed, 10 Feb 2021 16:49:09 +0100
Subject: [PATCH] Added check-symlinks.ps1

---
 Data/scripts.csv           |  1 +
 README.md                  |  1 +
 Scripts/check-symlinks.ps1 | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 37 insertions(+)
 create mode 100755 Scripts/check-symlinks.ps1

diff --git a/Data/scripts.csv b/Data/scripts.csv
index 1048486a..ee26f2b2 100644
--- a/Data/scripts.csv
+++ b/Data/scripts.csv
@@ -2,6 +2,7 @@ Filename,Description
 add-firewall-rules.ps1, adds firewall rules to the given executables (requires admin rights)
 check-ipv4-address.ps1, checks the given IPv4 address for validity
 check-mac-address.ps1, checks the given MAC address for validity
+check-symlinks.ps1, checks every symlink in the given directory tree
 check-xml-file.ps1, checks the given XML file for validity
 clone-repos.ps1, clones well-known Git repositories
 close-calculator.ps1, closes the calculator program gracefully
diff --git a/README.md b/README.md
index e59569b9..936ba3a4 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ Table of Contents
 * [add-firewall-rules.ps1](Scripts/add-firewall-rules.ps1) - adds firewall rules for the given executables (requires admin rights)
 * [check-ipv4-address.ps1](Scripts/check-ipv4-address.ps1) - checks the given IPv4 address for validity
 * [check-mac-address.ps1](Scripts/check-mac-address.ps1) - checks the given MAC address for validity
+* [check-symlinks.ps1](Scripts/check-symlinks.ps1) - checks every symlink in the given directory tree
 * [check-xml-file.ps1](Scripts/check-xml-file.ps1) - checks the given XML file for validity
 * [clone-repos.ps1](Scripts/clone-repos.ps1) - clones well-known Git repositories
 * [close-calculator.ps1](Scripts/close-calculator.ps1) - closes the calculator program gracefully
diff --git a/Scripts/check-symlinks.ps1 b/Scripts/check-symlinks.ps1
new file mode 100755
index 00000000..4c26e279
--- /dev/null
+++ b/Scripts/check-symlinks.ps1
@@ -0,0 +1,35 @@
+#!/bin/powershell
+<#
+.SYNTAX         ./check-symlinks.ps1 [<dir-tree>]
+.DESCRIPTION	checks every symlink in the given directory tree
+.LINK		https://github.com/fleschutz/PowerShell
+.NOTES		Author:	Markus Fleschutz / License: CC0
+#>
+
+param($DirTree = "")
+
+try {
+	if ($DirTree -eq "" ) {
+		$DirTree = read-host "Enter the path to the directory tree"
+	}
+
+	[int]$SymlinksTotal = [int]$SymlinksBroken = 0
+	gci $DirTree -Recurse  | Where { $_.Attributes -match "ReparsePoint" } | ForEach-Object {
+		$Symlink = $_.FullName
+		$Target = ($_ | Select-Object -ExpandProperty Target -ErrorAction Ignore)
+		if ($Target) {
+			$path = $_.FullName + "\..\" + ($_ | Select-Object -ExpandProperty Target)
+			$item = Get-Item $path -ErrorAction Ignore
+			if (!$item) {
+				write-output "Symlink $Symlink -> $Target is broken"
+				$SymlinksBroken++
+			}
+		}
+		$SymlinksTotal++
+	}
+	echo "Done - found $SymlinksTotal symlinks total, $SymlinksBroken are broken"
+	exit $SymlinksBroken
+} catch {
+	write-error "ERROR in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}