busybox/examples/var_service/zcip_if/convert2ipconf

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#!/bin/sh
# convert:
#interface=eth1
#ip=169.254.x.y
# into:
#let cfg=cfg+1
#if[$cfg]=...; ip[$cfg]=...; ipmask[$cfg]=.../...; gw[$cfg]=...; net[$cfg]=... dns[$cfg]=...
exec >/dev/null
#exec >"$0.out" # debug
exec 2>&1
test "$interface" || exit 1
test "$ip" || exit 1
{
echo "let cfg=cfg+1"
test "$interface" && echo "if[\$cfg]='$interface'"
test "$ip" && echo "ip[\$cfg]='$ip'"
test "$ip" && echo "ipmask[\$cfg]='$ip/16'"
} >"$1"