处理简单选项

#!/bin/bash
# extracting command line options as parameters

while [ -n "$1" ]
do
    case "$1" in
    -a) echo "Found the -a option";;
    -b) echo "Found the -b optins";;
    -c) echo "Found the -c optins";;
    *) echo "$1 is not a valid options";;
    esac
    shift
done