#!/bin/ksh
# Script name: opts4
# Example 10.140

# Using getopts -- Fourth try --
alias USAGE='print "usage: opts4 [-x] filename " >&2'
while getopts :x: arguments 
do
    case $arguments in
	x) print "$OPTARG is the name of the argument ";;

	:) print "Please enter an argument after the -x option" >&2
	    USAGE ;;
	\?) print "$OPTARG is not a valid option." >&2
	    USAGE;;
    esac
    print "$OPTIND" # The number of the next argument to be processed
done