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Editing File: /etc/sysconfig/network-scripts/ifdown-eth

#!/bin/bash
# Network Interface Configuration System
# Copyright (c) 1996-2009 Red Hat, Inc. all rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2,
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

. /etc/init.d/functions

cd /etc/sysconfig/network-scripts
. ./network-functions

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

CONFIG=${1}

source_config

. /etc/sysconfig/network

# Check to make sure the device is actually up
check_device_down ${DEVICE} && [ "$BOOTPROTO" != "dhcp" -a "$BOOTPROTO" != "bootp" ] && [ -n "$VLAN" -a "$VLAN" != "yes" ] && exit 0

if [ -n "${TEAM_MASTER}" ] && [ ! "${DEVICETYPE}" = "TeamPort" ] && [ -x ./ifdown-TeamPort ]; then
    ./ifdown-TeamPort ${CONFIG} $2
fi

if [ "${SLAVE}" != "yes" -o -z "${MASTER}" ]; then
    if [ -n "${HWADDR}" -a -z "${MACADDR}" ]; then
        FOUNDMACADDR=$(get_hwaddr ${REALDEVICE})
        if [ -n "${FOUNDMACADDR}" -a "${FOUNDMACADDR}" != "${HWADDR}" ]; then
            NEWCONFIG=$(get_config_by_hwaddr ${FOUNDMACADDR})
            if [ -n "${NEWCONFIG}" ]; then
                eval $(LANG=C grep -F "DEVICE=" $NEWCONFIG)
            else
                net_log $"Device ${DEVICE} has MAC address ${FOUNDMACADDR}, instead of configured address ${HWADDR}. Ignoring."
                exit 1
            fi
            if [ -n "${NEWCONFIG}" -a "${NEWCONFIG##*/}" != "${CONFIG##*/}" -a "${DEVICE}" = "${REALDEVICE}" ]; then
                exec /sbin/ifdown ${NEWCONFIG}
            else
                net_log $"Device ${DEVICE} has MAC address ${FOUNDMACADDR}, instead of configured address ${HWADDR}. Ignoring."
                exit 1
            fi
        fi
    fi
fi

if is_bonding_device ${DEVICE} ; then
    for device in $(LANG=C grep -l "^[[:space:]]*MASTER=['\"]\?${DEVICE}['\"]\?$[[:space:]#]\|$$" /etc/sysconfig/network-scripts/ifcfg-*) ; do
        is_ignored_file "$device" && continue
        /sbin/ifdown ${device##*/}
    done
    for arg in $BONDING_OPTS ; do
        key=${arg%%=*};
        [[ "${key}" != "arp_ip_target" ]] && continue
        value=${arg##*=};
        if [ "${value:0:1}" != "" ]; then
            OLDIFS=$IFS;
            IFS=',';
            for arp_ip in $value; do
                if grep -q $arp_ip /sys/class/net/${DEVICE}/bonding/arp_ip_target; then
                    echo "-$arp_ip" > /sys/class/net/${DEVICE}/bonding/arp_ip_target
                fi
            done
            IFS=$OLDIFS;
        else
            value=${value#+};
            if grep -q $value /sys/class/net/${DEVICE}/bonding/arp_ip_target; then
                echo "-$value" > /sys/class/net/${DEVICE}/bonding/arp_ip_target
            fi
        fi
    done
fi

/etc/sysconfig/network-scripts/ifdown-ipv6 ${CONFIG}

retcode=0

for VER in "" 6 ; do
    if [ -f "/var/run/dhclient$VER-${DEVICE}.pid" ]; then
        dhcpid=$(cat /var/run/dhclient$VER-${DEVICE}.pid)
        generate_lease_file_name $VER
        if is_true "$DHCPRELEASE";  then
            /sbin/dhclient -r -lf ${LEASEFILE} -pf /var/run/dhclient$VER-${DEVICE}.pid ${DEVICE} >/dev/null 2>&1
            retcode=$?
        else
            kill $dhcpid >/dev/null 2>&1
            retcode=$?
            reason=STOP$VER interface=${DEVICE} /sbin/dhclient-script
        fi
        if [ -f "/var/run/dhclient$VER-${DEVICE}.pid" ]; then
            rm -f /var/run/dhclient$VER-${DEVICE}.pid
            kill $dhcpid >/dev/null 2>&1
        fi  
    fi
done

# we can't just delete the configured address because that address
# may have been changed in the config file since the device was
# brought up.  Flush all addresses associated with this
# instance instead.
if [ -d "/sys/class/net/${REALDEVICE}" ]; then
    LABEL=
    if [ "${REALDEVICE}" != "${DEVICE}" ]; then
        LABEL="label ${DEVICE}"
    fi
    if [ "${REALDEVICE}" = "lo" ]; then
        TIMEOUT=""
        [ -x /usr/bin/timeout ] && TIMEOUT="/usr/bin/timeout --signal=SIGQUIT 4"
        $TIMEOUT ip addr flush dev ${REALDEVICE} ${LABEL} scope global 2>/dev/null
        $TIMEOUT ip addr flush dev ${REALDEVICE} ${LABEL} scope host 2>/dev/null
    else
        ip addr flush dev ${REALDEVICE} ${LABEL} scope global 2>/dev/null
        ip -4 addr flush dev ${REALDEVICE} ${LABEL} scope host 2>/dev/null
    fi

if [ "${SLAVE}" = "yes" -a -n "${MASTER}" ]; then
        echo "-${DEVICE}" > /sys/class/net/${MASTER}/bonding/slaves 2>/dev/null
    fi

if [ "${REALDEVICE}" = "${DEVICE}" ]; then
        ip link set dev ${DEVICE} down 2>/dev/null
    fi
fi
[ "$retcode" = "0" ] && retcode=$?

if [ -n "${BRIDGE}" ] && [ -x /usr/sbin/brctl ]; then
    /sbin/ip link set dev ${DEVICE} down
    /usr/sbin/brctl delif -- ${BRIDGE} ${DEVICE}
    # Upon removing a device from a bridge,
    # it's necessary to make radvd reload its config
    [ -r /var/run/radvd/radvd.pid ] && kill -HUP $(cat /var/run/radvd/radvd.pid)
    if [ -d /sys/class/net/${BRIDGE}/brif ] && [ $(ls -1 /sys/class/net/${BRIDGE}/brif | wc -l) -eq 0 ]; then
        /usr/sbin/brctl delbr -- ${BRIDGE}
    fi
fi

if [ "${TYPE}" = "Tap" ]; then
    TUNMODE="mode tap"
    [[ ${DEVICE} == tun* ]] && TUNMODE="mode tun"
    ip tuntap del ${TUNMODE} dev ${DEVICE} >/dev/null
fi

if [ -n "${TEAM_CONFIG}" ] && [ ! "${DEVICETYPE}" = "Team" ] && [ -x ./ifdown-Team ]; then
    ./ifdown-Team ${CONFIG} $2
fi

# wait up to 5 seconds for device to actually come down...
waited=0
while ! check_device_down ${DEVICE} && [ "$waited" -lt 50 ] ; do
    sleep 0.01
    waited=$(($waited+1))
done

# don't leave an outdated key sitting around
if [ -n "${WIRELESS_ENC_KEY}" ] && [ -x /sbin/iwconfig ]; then
    /sbin/iwconfig ${DEVICE} enc 0 >/dev/null 2>&1
fi

if [ "$retcode" = 0 ] ; then
    /etc/sysconfig/network-scripts/ifdown-post $CONFIG
    # do NOT use $? because ifdown should return whether or not
    # the interface went down.
fi

if [ -n "$VLAN" ]; then
    # 802.1q VLAN
    if [ -f /proc/net/vlan/${DEVICE} ]; then
        ip link delete ${DEVICE} type vlan
    fi
fi

exit $retcode

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