From a56c37983cd698e0d22f909621006207d0738390 Mon Sep 17 00:00:00 2001
From: Chris Wells <chriswells0@users.noreply.github.com>
Date: Sun, 13 Dec 2020 20:22:59 -0500
Subject: [PATCH] Verify interface exists when starting non-vnet jail.

Closes #128.
---
 usr/local/share/bastille/start.sh | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/usr/local/share/bastille/start.sh b/usr/local/share/bastille/start.sh
index 145c7be5..66c1fe83 100644
--- a/usr/local/share/bastille/start.sh
+++ b/usr/local/share/bastille/start.sh
@@ -67,11 +67,21 @@ for _jail in ${JAILS}; do
 
     ## test if not running
     elif [ ! "$(jls name | awk "/^${_jail}$/")" ]; then
+        # Verify that the configured interface exists. -- cwells
+        if [ "$(bastille config $_jail get vnet)" != 'enabled' ]; then
+            _interface=$(bastille config $_jail get interface)
+            if ! ifconfig | grep "^${_interface}:" >/dev/null; then
+                error_notify "Error: ${_interface} interface does not exist."
+                continue
+            fi
+        fi
+
         ## warn if matching configured (but not online) ip4.addr, ignore if there's no ip4.addr entry
         ip=$(grep 'ip4.addr' "${bastille_jailsdir}/${_jail}/jail.conf" | awk '{print $3}' | sed 's/\;//g')
         if [ -n "${ip}" ]; then
             if ifconfig | grep -w "${ip}" >/dev/null; then
-                error_exit "Error: IP address (${ip}) already in use."
+                error_notify "Error: IP address (${ip}) already in use."
+                continue
             fi
         fi