#!/bin/bash

# run dhclient.d scripts in an emulated environment

PATH=/bin:/usr/bin:/sbin

SAVEDIR=/var/lib/dhclient

ETCDIR=/etc/dhcp

interface=$1

eval "$(

declare | LC_ALL=C grep '^DHCP4_[A-Z_]*=' | while read -r opt; do

    optname=${opt%%=*}

    optname=${optname,,}

    optname=new_${optname#dhcp4_}

    optvalue=${opt#*=}

    echo "export $optname=$optvalue"

done

)"

[ -f /etc/sysconfig/network ] && . /etc/sysconfig/network

[ -f /etc/sysconfig/network-scripts/ifcfg-$interface ] && \

    . /etc/sysconfig/network-scripts/ifcfg-$interface

if [ -d $ETCDIR/dhclient.d ]; then

    for f in $ETCDIR/dhclient.d/*.sh; do

        if [ -x $f ]; then

            subsystem="${f%.sh}"

            subsystem="${subsystem##*/}"

            . ${f}

            if [ "$2" = "up" ]; then

                "${subsystem}_config"

            elif [ "$2" = "dhcp4-change" ]; then

                if [ "$subsystem" = "chrony" -o "$subsystem" = "ntp" ]; then

                    "${subsystem}_config"

                fi

            elif [ "$2" = "down" ]; then

                "${subsystem}_restore"

            fi

        fi

    done

fi