buildroot

#!/bin/sh

​

# dhclient-script from OpenWRT project

# http://git.openwrt.org/?p=packages.git;a=blob;f=net/isc-dhcp/files/dhclient-script;h=4afebc0ad20ebac51c5baae5ed01c6713e3a0fd0;hb=HEAD

​

make_resolv_conf() {

  if [ x"$new_domain_name_servers" != x ]; then

    cat /dev/null > /etc/resolv.conf.dhclient

    chmod 644 /etc/resolv.conf.dhclient

    if [ x"$new_domain_search" != x ]; then

      echo search $new_domain_search >> /etc/resolv.conf.dhclient

    elif [ x"$new_domain_name" != x ]; then

      # Note that the DHCP 'Domain Name Option' is really just a domain

      # name, and that this practice of using the domain name option as

      # a search path is both nonstandard and deprecated.

      echo search $new_domain_name >> /etc/resolv.conf.dhclient

    fi

    for nameserver in $new_domain_name_servers; do

      echo nameserver $nameserver >>/etc/resolv.conf.dhclient

    done

​

  elif [ "x${new_dhcp6_name_servers}" != x ] ; then

    cat /dev/null > /etc/resolv.conf.dhclient6

    chmod 644 /etc/resolv.conf.dhclient6

​

    if [ "x${new_dhcp6_domain_search}" != x ] ; then

      echo search ${new_dhcp6_domain_search} >> /etc/resolv.conf.dhclient6

    fi

    for nameserver in ${new_dhcp6_name_servers} ; do

      echo nameserver ${nameserver} >> /etc/resolv.conf.dhclient6

    done

  fi

​

  # if both v4 and v6 clients are running, concatenate results

  cat /etc/resolv.conf.* > /etc/resolv.conf

}

​

# Must be used on exit.   Invokes the local dhcp client exit hooks, if any.

exit_with_hooks() {

  exit_status=$1

  if [ -f /etc/dhclient-exit-hooks ]; then

    . /etc/dhclient-exit-hooks

  fi

# probably should do something with exit status of the local script

  exit $exit_status

}

​

# Invoke the local dhcp client enter hooks, if they exist.

if [ -f /etc/dhclient-enter-hooks ]; then

  exit_status=0

  . /etc/dhclient-enter-hooks

  # allow the local script to abort processing of this state

  # local script must set exit_status variable to nonzero.

  if [ $exit_status -ne 0 ]; then

    exit $exit_status

  fi

fi

​

###

### DHCPv4 Handlers

###

​

if [ x$new_broadcast_address != x ]; then