source: drbl_ui/backup/test_busybox/busybox-1.7.2/examples/zcip.script @ 144

#!/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