=== modified file 'zsh-functions/confz_ip_init'
--- zsh-functions/confz_ip_init	2016-02-22 11:57:59 +0000
+++ zsh-functions/confz_ip_init	2016-02-22 11:51:54 +0000
@@ -9,16 +9,18 @@
 	checkvars name mac
 
 	# local -A ifaces
-	local ignored iface mac rest out old_name
+	local ignored iface mac rest out ok old_name
 
 	out=$( confz_do ip link show ) || die "ip failed"
 
+	ok=0
 	while read ignored iface rest; do
 		read ignored mac rest
 		if [[ ${iface%:} == $vars[name] ]]; then
 			[[ $mac == $vars[mac] ]] || \
 				die "${(qqq)iface%:} already exists with different MAC address"
-			return 0
+			ok=1
+			break
 		fi
 		if [[ -z $old_name && $mac == $vars[mac] ]]; then
 			old_name=${iface%:}
@@ -28,5 +30,5 @@
 	[[ -n $old_name ]] || die "could not find interface with MAC: $vars[mac]"
 
 	do_command=( ip link set dev $old_name name $vars[name] )
-	return 1
+	(($ok))
 }