ShellScript

address.sh

#!/bin/bash

# IPアドレスを2進数に変換する
# 実行例
# $ ./address.sh 172.24.140.1/26
# Netmask: 11111111 11111111 11111111 11000000
# Address: 10101100 00011000 10001100 00000000

address=${1}

octet1=`echo "${address}" | awk -F"." '{print $1}'`
octet2=`echo "${address}" | awk -F"." '{print $2}'`
octet3=`echo "${address}" | awk -F"." '{print $3}'`
octet4=`echo "${address}" | awk -F"." '{print $4}'`
netmask=`echo "${address}" | awk -F"/" '{print $2}'`

octet1_bin=`echo "obase=2; ibase=10;" ${octet1}| bc`
octet1_bin=`printf %08d ${octet1_bin}`

octet2_bin=`echo "obase=2; ibase=10;" ${octet2}| bc`
octet2_bin=`printf %08d ${octet2_bin}`

octet3_bin=`echo "obase=2; ibase=10;" ${octet3}| bc`
octet3_bin=`printf %08d ${octet3_bin}`

octet4_bin=`echo "obase=2; ibase=10;" ${octet4}| bc`
octet4_bin=`printf %08d ${octet4_bin}`

for i in `seq 1 32`
do
    if [ ${i} -le ${netmask} ]
    then
        netmask_bin+="1"
    else
        netmask_bin+="0"
    fi

    if [ $(( i % 8 )) = 0 ]
    then
        netmask_bin+=" "
    fi
done

echo "Netmask: ${netmask_bin}"
echo "Address: ${octet1_bin} ${octet2_bin} ${octet3_bin} ${octet4_bin}"