Improve setup-qbittorent.zsh

setup-qbittorent.zsh

@@ -23,8 +23,15 @@ printf 'Using interface: %s\n' "${iface}"
 # <-A|-D> <ex_ip> <in_ip>
 function do_rules {
     emulate -L zsh
+    function handle_error {
+        setopt noxtrace
+        echo Failed to add iptables rules
+        rm -f "${save_file}"
+        exit 1
+    }
+    [[ "${1}" = -A ]] && trap handle_error INT ZERR
     PS4='Run: '
-    setopt errexit xtrace
+    setopt xtrace
     doas iptables -t filter "${1}" FORWARD -i "${iface}" -o wg0-mullvad -j ACCEPT
 
     doas iptables -t nat "${1}" PREROUTING -d "${2}"/32 -p tcp -m tcp --dport 62000 \