ex18.sh

Shall高级编程

#!/bin/bash
# ex18.sh

# Does a 'whois domain-name' lookup on any of 3 alternate servers:
#                    ripe.net, cw.net, radb.net

# Place this script -- renamed 'wh' -- in /usr/local/bin

# Requires symbolic links:
# ln -s /usr/local/bin/wh /usr/local/bin/wh-ripe
# ln -s /usr/local/bin/wh /usr/local/bin/wh-cw
# ln -s /usr/local/bin/wh /usr/local/bin/wh-radb

E_NOARGS=65


if [ -z "$1" ]
then
  echo "Usage: `basename $0` [domain-name]"
  exit $E_NOARGS
fi

# Check script name and call proper server.
case `basename $0` in    # Or:    case ${0##*/} in
    "wh"     ) whois $[e-mail];;
    "wh-ripe") whois $[e-mail];;
    "wh-radb") whois $[e-mail];;
    "wh-cw"  ) whois $[e-mail];;
    *        ) echo "Usage: `basename $0` [domain-name]";;
esac 

exit $?