From d30e11d019c80648b17d7f76eb81aba4ea8f742a Mon Sep 17 00:00:00 2001
From: Nyr <me@nyr.be>
Date: Thu, 14 May 2020 19:05:05 +0200
Subject: [PATCH] Improve TUN device check

While it looks hackish, I don't think there's a better way (in Bash) to open
the /dev/net/tun character device.

Checking for presence of /dev/net/tun like were doing is not good enough.
---
 openvpn-install.sh | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/openvpn-install.sh b/openvpn-install.sh
index bab1d8d..c87a88d 100644
--- a/openvpn-install.sh
+++ b/openvpn-install.sh
@@ -57,9 +57,11 @@ This version of CentOS is too old and unsupported"
 	exit
 fi
 
-if [[ ! -e /dev/net/tun ]]; then
-	echo "The TUN device is not available
-You need to enable TUN before running this script"
+if [[ -e /dev/net/tun ]] && exec 2>/dev/null 7<>/dev/net/tun; then
+	exec 7>&-
+else
+	echo "This system does not have the TUN device available
+TUN needs to be enabled before running this installer"
 	exit
 fi