hostsファイルをdnsmasq設定に変換する

hosts2dnsmasq.sh

#!/bin/sh

# usage:
# $ sudo hosts2dnsmasq.sh /etc/hosts

source=$1
tmphosts="$1.tmp"
maskhostsdir=/etc/dnsmasq.d
maskhostsfile=0hosts
dnsmasq_hosts="$maskhostsdir/$maskhostsfile"
dnsmasq_conf=/etc/dnsmasq.conf.
dnsmasq_resolv=/etc/resolv.dnsmasq.conf
namesrv1="8.8.8.8"
namesrv2="8.8.4.4"

if [ $# -ne 1 ]; then
  echo "Too short arguments."
  exit 1
fi

cp -f $source $tmphosts
mkdir -p
if [ ! -e $maskhostsdir ]; then
  mkdir -p $maskhostsdir
fi

if [ -e $dnsmasq_hosts ]; then
  rm -f $dnsmasq_hosts
fi
if [ -e $dnsmasq_conf ]; then
  rm -f $dnsmasq_conf
fi
if [ -e $dnsmasq_resolv ]; then
  rm -f $dnsmasq_resolv
fi

# Remove comments and empty lines
sed -i -e "/^#.*$/d" $tmphosts 
sed -i -e "/^$/d" $tmphosts 
# convert ::1 
sed -i -e "s/^::1/0:0:0:0:0:0:0:1/g" $tmphosts 

# reading per line
IFS_BK=$IFS
IFS=$'\n'
file=(`cat $tmphosts`)

for i in ${file[@]}
do
  pos=0

  IFS=$IFS_BK
  line=($i)
  # delimit per space
  for p in ${i[@]}
  do
    if [ $pos -eq 0 ]
    then
      addr=$p 
    else
      map="address=\"/$p/$addr\""
      echo $map >> $dnsmasq_hosts
    fi
    pos=`expr $pos + 1`
  done
  IFS=$IFS_BK
done

#ちゃんと戻す
IFS=$IFS_BK

# dnsmasq configration
echo 'listen-address=127.0.0.1' >> $dnsmasq_conf
echo "resolv-file=$dnsmasq_resolv" >>$dnsmasq_conf 
echo "conf-dir=$maskhostsdir" >>$dnsmasq_conf 
echo 'user=root' >> $dnsmasq_conf
echo "nameserver $namesrv1" >> $dnsmasq_resolv
echo "nameserver $namesrv2" >> $dnsmasq_resolv

rm -f $tmphosts

# echo results
echo "[$dnsmasq_hosts]"
cat $dnsmasq_hosts
echo "[$dnsmasq_conf]"
cat $dnsmasq_conf
echo "[$dnsmasq_resolv]"
cat $dnsmasq_resolv