#!/bin/sh
#
# Copyright 1995, by Hewlett-Packard Company
#
# The code in this file is from the book "Shell Programming
# Examples" by Bruce Blinn, published by Prentice Hall.
# This file may be copied free of charge for personal,
# non-commercial use provided that this notice appears in
# all copies of the file.  There is no warranty, either
# expressed or implied, supplied with this code.
#
# NAME
#    hostaddr - return the IP address for a system
#
# SYNOPSIS
#    hostaddr [hostname]
#
# DESCRIPTION
#    This command writes the IP address for the system to
#    the standard output.  If the host name is not passed,
#    the IP address of the current system is returned.  If
#    the host is not found, nothing will be written to the
#    standard output.
#
#    Since this command searches the /etc/hosts file to find
#    the IP address for the system, this command may not
#    work on systems that use a network server to manage the
#    names of the hosts on the network, such as YP or BIND.
#
############################################################

HOST=${1:-`hostname`}
HOST=`echo $HOST | sed -e 's/\..*//'`

cat /etc/hosts                          |
     sed  -e 's/#.*//'                  \
          -e 's/	/ /g'           \
          -e 's/  */ /g'                \
          -e 's/ *$//g'                 \
          -e 's/^ *//g'                 \
          -e "s/ $HOST[. ].*/ $HOST/g"  |
     sed  -n "/ $HOST$/p"               |
     sed  -e 's/ .*//'

exit 0