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#!/bin/bash
# Author: Steven Shiau <steven _at_ clonezilla org>
# License: GPL
# Description: Get the network address from IP address and netmask
# Notes: "ipcalc" program is totally different in Debian and RedHat-like distribution.
# NOTE! We do NOT use this program in drblpush anymore. Just use the perl script ipcalc which is collected in package drbl.
# Load DRBL setting and functions
DRBL_SCRIPT_PATH="${DRBL_SCRIPT_PATH:-/usr/share/drbl}"
. $DRBL_SCRIPT_PATH/sbin/drbl-conf-functions
export LC_ALL=C
# Append a default search path.
PATH="$PATH:/sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin"
export PATH
Usage() {
echo "Get the network address from IP address and netmask"
echo "Usage:"
echo "$(basename $0) IPADDR NETMASK"
echo "Ex: $(basename $0) 192.168.10.213 255.255.255.240"
}
# Parse command-line options
while [ $# -gt 0 ]; do
case "$1" in
-*) echo "${0}: ${1}: invalid option" >&2
Usage >& 2
exit 2 ;;
*) break ;;
esac
done
ipaddr=$1
netmask=$2
[ -z "$ipaddr" ] && exit 0
[ -z "$netmask" ] && exit 0
# The output of ipcalc without "=", it must be in Debian... we use ipsc.
# Debian's ipcalc output like this
# Network: 192.168.103.208/28 11000000.10101000.01100111.1101 0000
network="$(drbl-ipcalc $ipaddr $netmask | awk -F" " '/Network:/ {print $2}' | sed -e "s/\/.*//g")"
echo $network
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