From e071610a37bbb487c7468dfdc4b183f3c2fef10c Mon Sep 17 00:00:00 2001
From: Jeremy Lecour <jlecour@evolix.fr>
Date: Sat, 22 May 2021 23:12:09 +0200
Subject: [PATCH] check for commands

---
 minifirewall | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/minifirewall b/minifirewall
index f579a6e..fc027c0 100755
--- a/minifirewall
+++ b/minifirewall
@@ -38,8 +38,16 @@ set -u
 #########################
 
 # iptables paths
-IPT=/sbin/iptables
-IPT6=/sbin/ip6tables
+IPT=$(command -v iptables)
+if [ -z "${IPT}" ]; then
+    echo "Unable to find 'iptables\` command in PATH." >&2
+    exit 1
+fi
+IPT6=$(command -v ip6tables)
+if [ -z "${IPT6}" ]; then
+    echo "Unable to find 'ip6tables\` command in PATH." >&2
+    exit 1
+fi
 
 # TCP/IP variables
 LOOPBACK='127.0.0.0/8'