Checking DNS status of a site

There are situations where you need to quickly check if the DNS records for a particular site
have been updated in the public DNS servers after you make certain changes. The following is a simple script that does just that :

1. First create a file named digsite.servers containing a list of public DNS servers against whom you want to check your DNS records.
2. Create a script file digsite.sh as follows :
   
   

servers=""

checkServer()
{
  c1=0
  c2=0
  set="NOT SET"
  SET=0
  for ii in `dig @$1 $2 any 2>&1`
  do
    if test $c2 = 1 ; then
      c2=2
    fi
    if test $c1 = 3 -a "AA$ii" = "AAA" ; then
      c2=1
    fi
    if test $c2 = 2 ; then
      set="$ii"
      SET=1
      break
    fi
    if test $c1 = 0 -a "AA$ii" = "AA;;" ; then
      c1=1
    elif test $c1 = 1 ; then
      if test "AA$ii" = "AAANSWER" ; then
        c1=2
      else
        c1=0
      fi
    elif test $c1 = 2 ; then
      if test "AA$ii" = "AASECTION:" ; then
        c1=3
      else
        c1=0
      fi
    fi
  done
  ss=`echo $1@@@@@@@@@@@@@@@@@@@@@@@@@ | cut -c1-33`
  ss=`echo $ss | tr "@" "."`
  echo -e "  $ss $set"
  if test $SET = 0 ; then
    servers=`echo $servers $1`
  fi
}
if test $# = 0 ; then
  echo nsite site_name
  exit
fi
site=$1
name=""
NAME=0
for ii in `echo .:$PATH | tr ':' ' '`
do
  if test -f $ii/digsite.servers ; then
    name=`cat $ii/digsite.servers`
    NAME=1
    break;
  fi
done
if test $NAME = 0 ; then exit ; fi
clear
cnt=0
for ii in $name
do
  if test $cnt = 0 ; then
    echo -e "  Checking $site on:"
  fi
  cnt=`expr $cnt + 1`
  checkServer $ii $site
  if test $cnt = 23 ; then
    cnt=0
  fi
done
if test "AA$servers" != "AA" ; then
  echo -e "\n   $site NOT SET on:  "
  for ii in $servers
  do
    echo "  $ii"
  done
fi