etc/dists/scripts/redhat-del_ip.sh

#!/bin/bash
#  Copyright (C) 2000-2006 SWsoft. 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 as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#
# This script deletes IP alias(es) inside VE for RedHat like systems.
#
# Parameters are passed in environment variables.
# Required parameters:
#   IP_ADDR       - IPs to delete, several addresses should be divided by space
# Optional parameters:
#   IPDELALL      - delete all ip addresses
VENET_DEV=venet0
VENET_DEV_CFG=ifcfg-${VENET_DEV}
IFCFG_DIR=/etc/sysconfig/network-scripts/
IFCFG=${IFCFG_DIR}${VENET_DEV_CFG}

# Function to delete IP address for RedHat like systems
function del_ip()
{
	local ip
	local filetodel
	local file
	local aliasid

	[ -d ${IFCFG_DIR} ] || return 0
	cd ${IFCFG_DIR} || return 0
	if [ "x${IPDELALL}" = "xyes" ]; then
		ifdown ${VENET_DEV} >/dev/null 2>&1
		rm -f ${VENET_DEV_CFG} ${VENET_DEV_CFG}:* 2>/dev/null
		del_param ${IFCFG} IPV6ADDR_SECONDARIES ""
		return 0;
	fi
	for ip in ${IP_ADDR}; do
		# IPV6 processing
		if [ "${ip#*:}" != "${ip}" ]; then
			del_param ${IFCFG} IPV6ADDR_SECONDARIES "${ip}\\/128"
			continue
		fi
		# find and delete a file with this alias
		filetodel=`grep -l "IPADDR=${ip}$" \
			${VENET_DEV_CFG}:* 2>/dev/null`
		for file in ${filetodel}; do
			rm -f "${file}"
			aliasid=`echo ${file} | sed s/.*://g`
			if [ -n "${aliasid}" ]; then
				ifconfig ${VENET_DEV}:${aliasid} down >/dev/null 2>&1
			fi
		done
	done
}

del_ip
exit 0
# end of script