使用getopts

#!/bin/bash
# simple demonstration of the getopts command

while getopts :ab:c opt
do
    case "$opt" in
    a) echo "Found the -a option";;
    b) echo "Found the -b option, with value $OPTARG";;
    c) echo "Found the -c option";;
    *) echo "Unknown option:$opt";;
    esac
done