opts3

UNIX+shell范例精解（第4版）代码

#!/bin/ksh
# Program opts3
# Using getopts -- Third try --
while getopts :d options
do
	case $options in
	d) print -R "-d is the ON switch";;
	+d) print -R "+d is the OFF switch";;
	\?) print $OPTARG is not a valid option;;
	esac
done
# Need the -R option with print or the shell tries to use -d as a
# print option