MINI SHELL

#!/bin/bash
# Network Interface Configuration System
# Copyright (c) 1996-2005 Red Hat, Inc. all rights reserved.
#
# This software may be freely redistributed under the terms of the GNU
# public license.
#
# 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., 675 Mass Ave, Cambridge, MA 02139, USA.

. /etc/init.d/functions

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

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

CONFIG=${1}

source_config

if [ -n "${BRIDGE}" -a -x /usr/sbin/brctl ]; then
      /sbin/ip link set dev ${DEVICE} down
      /usr/sbin/brctl delif ${BRIDGE} ${DEVICE}
      # Upon removing a device from a bridge,
      # it's necessary to make radvd reload its config
      [ -r /var/run/radvd/radvd.pid ] && kill -HUP `cat /var/run/radvd/radvd.pid`
      if LC_ALL=C /usr/sbin/brctl show | LC_ALL=C grep -q "^${BRIDGE}	.*can't get port info"; then
	  /usr/sbin/brctl delbr ${BRIDGE}
      fi
      exit 0
fi

. /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 "${HWADDR}" -a -z "${MACADDR}" ]; then
    FOUNDMACADDR=`get_hwaddr ${REALDEVICE}`
    if [ -n "${FOUNDMACADDR}" -a "${FOUNDMACADDR}" != "${HWADDR}" ]; then
        NEWCONFIG=`get_config_by_hwaddr ${FOUNDMACADDR}`
	if [ -n "${NEWCONFIG}" -a "${NEWCONFIG##*/}" != "${CONFIG##*/}" ]; then
	   exec /sbin/ifdown ${NEWCONFIG}
	else
	   echo $"Device ${DEVICE} has MAC address ${FOUNDMACADDR}, instead of configured address ${HWADDR}. Ignoring."
	   exit 1
	fi
    fi
fi

if [ "${NETWORKING_IPV6}" = "yes" ]; then
    /etc/sysconfig/network-scripts/ifdown-ipv6 ${CONFIG}
    if [[ "${DHCPV6C}" = [Yy1]* ]] && [ -f /var/run/dhcp6c_${DEVICE}.pid ]; then
       kill `cat /var/run/dhcp6c_${DEVICE}.pid`;
       rm -f /var/run/dhcp6c_${DEVICE}.pid;
    fi;	
fi;

retcode=0
[ -n "`pidof -x dhclient`" ] && {
	if [ -f "/var/run/dhclient-${DEVICE}.pid" ]; then
		dhcpid=`cat /var/run/dhclient-${DEVICE}.pid`
		if [[ "$DHCPRELEASE" = [yY1]* ]];  then
			/sbin/dhclient -r -lf /var/lib/dhclient/dhclient-${DEVICE}.leases -pf /var/run/dhclient-${DEVICE}.pid ${DEVICE} >/dev/null 2>&1
			retcode=$?
		else
			kill $dhcpid >/dev/null 2>&1
			retcode=$?
		   	reason=STOP interface=${DEVICE} /sbin/dhclient-script
		fi
		if [ -f "/var/run/dhclient-${DEVICE}.pid" ]; then
			rm -f /var/run/dhclient-${DEVICE}.pid
			kill $dhcpid >/dev/null 2>&1
		fi	
	fi
}	
# we can't just delete the configured address because that address
# may have been changed in the config file since the device was
# brought up.  Flush all addresses associated with this
# instance instead.
if [ -d "/sys/class/net/${REALDEVICE}" ]; then
	if [ "${REALDEVICE}" = "${DEVICE}" ]; then
		ip addr flush dev ${REALDEVICE} 2>/dev/null
	else
		ip addr flush dev ${REALDEVICE} label ${DEVICE} 2>/dev/null
	fi

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

# wait up to 5 seconds for device to actually come down...
waited=0
while ! check_device_down ${DEVICE} && [ "$waited" -lt 50 ] ; do
    usleep 10000
    waited=$(($waited+1))
done

# don't leave an outdated key sitting around
if [ -n "${WIRELESS_ENC_KEY}" -a -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" -a -x /sbin/vconfig ]; then
    # 802.1q VLAN
    if echo ${DEVICE} | LANG=C egrep -v '(:)' | LANG=C egrep -q '(eth|bond)[0-9][0-9]*\.[0-9][0-9]?[0-9]?[0-9]?' \
	|| echo ${DEVICE} | LANG=C egrep -q 'vlan[0-9][0-9]?[0-9]?[0-9]?' ; then
	[ -f /proc/net/vlan/${DEVICE} ] && {
	    /sbin/vconfig rem ${DEVICE}
	}
    fi
fi

exit $retcode