From 9609b0b7b5ebcc3f5d7956e886241273e011be83 Mon Sep 17 00:00:00 2001
From: hwdsl2 <hwdsl2@users.noreply.github.com>
Date: Tue, 19 Jan 2016 01:26:12 -0600
Subject: [PATCH] Add check for network interface eth0

---
 vpnsetup.sh        | 6 ++++++
 vpnsetup_centos.sh | 9 +++++++++
 2 files changed, 15 insertions(+)

diff --git a/vpnsetup.sh b/vpnsetup.sh
index d526dcb..462cfb4 100644
--- a/vpnsetup.sh
+++ b/vpnsetup.sh
@@ -49,6 +49,12 @@ if [ "$(id -u)" != 0 ]; then
   exit 1
 fi
 
+# Make sure "eth0" is available
+if [ ! -f /sys/class/net/eth0/operstate ]; then
+  echo "Network interface 'eth0' is not available. Aborting."
+  exit 1
+fi
+
 # Check for empty VPN variables
 if [ -z "$IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then
   echo "The VPN credentials cannot be empty. Please re-edit the VPN script."
diff --git a/vpnsetup_centos.sh b/vpnsetup_centos.sh
index 80c4c8b..558089c 100644
--- a/vpnsetup_centos.sh
+++ b/vpnsetup_centos.sh
@@ -58,6 +58,15 @@ if [ "$(id -u)" != 0 ]; then
   exit 1
 fi
 
+# Make sure "eth0" is available
+if [ ! -f /sys/class/net/eth0/operstate ]; then
+  echo "Network interface 'eth0' is not available. Aborting."
+  echo
+  echo "CentOS 7 users should change interfaces to use the old naming convention"
+  echo "before running this script. See: https://wiki.centos.org/FAQ/CentOS7"
+  exit 1
+fi
+
 # Check for empty VPN variables
 if [ -z "$IPSEC_PSK" ] || [ -z "$VPN_USER" ] || [ -z "$VPN_PASSWORD" ]; then
   echo "The VPN credentials cannot be empty. Please re-edit the VPN script."