#!/bin/sh

# If we are running dhclient, shutdown running instances cleanly and

# bring them back up on resume.

. "${PM_FUNCTIONS}"

PM_DHCLIENT_RUNDIR="${PM_UTILS_RUNDIR}/network"

PM_DHCLIENT_SUSPEND="${PM_DHCLIENT_RUNDIR}/dhclient.suspend"

suspend_dhclient() {

    [ ! -d /etc/sysconfig/network-scripts ] && return

    [ ! -x /sbin/ifdown ] && return

    [ ! -d ${PM_DHCLIENT_RUNDIR} ] && /bin/mkdir -p ${PM_DHCLIENT_RUNDIR}

    [ -f ${PM_DHCLIENT_SUSPEND} ] && /bin/rm -f ${PM_DHCLIENT_SUSPEND}

    cd /etc/sysconfig/network-scripts

    for ifcfg in ifcfg-* ; do

        # Clear relevant parameters set by previous interface

        # (lo doesn't set them)

        NM_CONTROLLED=

        BOOTPROTO=

        . ./"${ifcfg}"

        if [ "${NM_CONTROLLED}" = "no" ] || [ "${NM_CONTROLLED}" = "n" ] || [ "${NM_CONTROLLED}" = "false" ]; then

            if [ "${BOOTPROTO}" = "bootp" ] || [ "${BOOTPROTO}" = "dhcp" ] || [ -z "${BOOTPROTO}" ]; then

                # device is not NetworkManager controlled and uses dhcp,

                # now see if it's actually up at the moment

                /sbin/ip link show ${DEVICE} | /bin/grep -qE "state (UP|UNKNOWN)" >/dev/null 2>&1

                if [ $? -eq 0 ]; then

                    echo "${DEVICE}" >> ${PM_DHCLIENT_SUSPEND}

                    /sbin/ifdown ${DEVICE}

                fi

            fi

        fi

    done

}

resume_dhclient() {

    [ ! -f ${PM_DHCLIENT_SUSPEND} ] && return

    [ ! -x /sbin/ifup ] && return

    cd /etc/sysconfig/network-scripts

    while read device ; do

        /sbin/ifup ${device}

    done < ${PM_DHCLIENT_SUSPEND}

    /bin/rm -f ${PM_DHCLIENT_SUSPEND}

}

case "$1" in

    hibernate|suspend)

        suspend_dhclient

        ;;

    thaw|resume)

        resume_dhclient

        ;;

    *) exit $NA

        ;;

esac