A domain name expiry checker.

namecheck.sh

#!/bin/bash

whoisfile="/tmp/namecheck.whois.$$.txt"
listfile="/tmp/namecheck.list.$$.txt"

trap "cleanup; exit 1" SIGINT SIGTERM

# Clean up temporary files.
function cleanup {
  rm -f $whoisfile $listfile
}

function buildlist {
  echo -n "" > $listfile

  for name in `cat $1`
  do

    whois $name > $whoisfile

    expiry=`egrep '(Expiration Date|Expires on|Expiry date):\s?(.+)' \
        $whoisfile | \
      sed -r -e 's/(Expiration Date|Expires on|Expiry date):\s?//' | \
      head -1`

    expiry=`date --date "$expiry" +%D`

    expiry_epoch=`date --date "$expiry" +%s`
    now_epoch=`date --date "now" +%s`
    daysleft=$(( (expiry_epoch - now_epoch)/86400 ))

    if grep -i mrx $whoisfile >> /dev/null; then
      responsible="MRX"
    else
      responsible="Client"
    fi

    echo "$name, $expiry, $daysleft, $responsible" >> $listfile

  done
}

function sortlist {
  echo "Domain Name, Expires On, Who Renews?"
  sort -n -t ',' -k 3 $listfile | cut -d ',' -f 1,2,4
}

function report {
  echo "Domains expiring in less than seven days."
  echo
  awk '{if(int($3) <= 7 ) print $0}' $listfile | \
    sort -n -t ',' -k 3 | cut -d ',' -f 1,2,4

  echo
  echo "Domains expiring in less than thirty days."
  echo 
  awk '{if(int($3) <= 30 ) print $0}' $listfile | \
    sort -n -t ',' -k 3 | cut -d ',' -f 1,2,4

  echo
}

function show_help {
  cat <<EOF
Usage: $0 -f domainlist.txt -r|-l|-h

  -f A list of domain names, one name per line.
  -r Report expiring domains over the next 7 and 30 day periods.
  -l List all domains in the order they shall expire.
  -h Show this help message.
EOF
}

action_report=0
action_list=0
action_help=0

# Parse options.
while getopts "f:rlh" opt; do
  case $opt in
    f)
      inputlist=$OPTARG
      ;;
    r)
      action_report=1
      ;;
    l)
      action_list=1
      ;;
    h)
      action_help=1
      ;;
  esac
done

# Do some error checking.
if [[ $action_help -eq '1' ]]; then
  show_help
  exit 0
elif [[ $(( $action_list + $action_report )) -ne '1' ]]; then
  echo "Must specify exactly one of -r or -l." >&2
  exit 1
elif [[ ! -r $inputlist ]]; then
  echo "Cannot read input file." >&2
  exit 1
elif [[ ! -v inputlist ]]; then
  echo "Must specify an input file." >&2
  exit 1
fi


# Now we're getting somewhere.
buildlist $inputlist
if [[ $action_list -eq '1' ]]; then
  sortlist
elif [[ $action_report -eq '1' ]]; then
  report
fi
cleanup