busybox/examples/zcip.script

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#!/bin/sh
# only for use as a "zcip" callback script
if [ "x$interface" = x ]
then
exit 1
fi
# zcip should start on boot/resume and various media changes
case "$1" in
init)
# for now, zcip requires the link to be already up,
# and it drops links when they go down. that isn't
# the most robust model...
exit 0
;;
config)
if [ "x$ip" = x ]
then
exit 1
fi
# remember $ip for $interface, to use on restart
if [ "x$IP" != x -a -w "$IP.$interface" ]
then
echo $ip > "$IP.$interface"
fi
exec ip address add dev $interface \
scope link local "$ip/16" broadcast +
;;
deconfig)
if [ x$ip = x ]
then
exit 1
fi
exec ip address del dev $interface local $ip
;;
esac
exit 1