From d382350bde95bd3339c92f815729ce4894b54947 Mon Sep 17 00:00:00 2001
From: hwdsl2 <hwdsl2@users.noreply.github.com>
Date: Sun, 13 Jan 2019 11:51:47 -0600
Subject: [PATCH] Improve VPN users

- Check VPN users for duplicates in the helper script
---
 extras/update_vpn_users.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/extras/update_vpn_users.sh b/extras/update_vpn_users.sh
index 49624eb..0df05da 100644
--- a/extras/update_vpn_users.sh
+++ b/extras/update_vpn_users.sh
@@ -82,6 +82,10 @@ case "$VPN_USERS $VPN_PASSWORDS" in
     ;;
 esac
 
+if printf '%s' "$VPN_USERS" | tr ' ' '\n' | sort | uniq -c | grep -qv '^ *1 '; then
+  exiterr "VPN usernames must not contain duplicates."
+fi
+
 clear
 
 cat <<'EOF'