getopts3.sh

来自「Solaris环境下Shell编程编程」· Shell 代码 · 共 25 行

#!/bin/sh

# Script name: getopts3.sh

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

year=`date +%Y`

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

   esac
done