getopts3.ksh

Solaris环境下Shell编程编程

#!/bin/ksh

# Script name: getopts3.ksh

USAGE="usage: $0 [-d] [-m month]"

year=$(date +%Y)

while getopts :dcm: opt_char
do
   case $opt_char in
      d) print -n "Date: "             # -d option given
            date ;;
      m) cal $OPTARG $year ;;          # -m option given with an arg
     \?) print "$OPTARG is not a valid option."
            print "$USAGE" ;;
      :) print "The $OPTARG option requires an argument."
            print "$USAGE" ;;
      c) print -n "Custom date: "
            date "+%a %b %e %Y" ;;
   esac
done