From d6e037ed8a1c027dc5398cffa0242823ff5c9cf4 Mon Sep 17 00:00:00 2001
From: Dan Johansen <strit@manjaro.org>
Date: Sat, 17 Aug 2019 14:06:53 +0200
Subject: [PATCH] add username character check

---
 manjaro-arm-installer | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/manjaro-arm-installer b/manjaro-arm-installer
index dfb5337..bceaae9 100755
--- a/manjaro-arm-installer
+++ b/manjaro-arm-installer
@@ -495,6 +495,11 @@ if [ ! -z "$EDITION" ]; then
 	--inputbox "Enter username:
 (usernames most be all lowercase)" 8 50 \
 	3>&1 1>&2 2>&3 3>&-)
+    if [[ "$USER" =~ [A-Z] ]] || [[ "$USER" == *['!'@#\$%^\&*()_+]* ]]; then
+    clear
+    msg "Configuration aborted! Username contained invalid characters."
+    exit 1
+    fi
 else 
 	clear
 	exit 1