shell 调用函数 case

#!/bin/shunload () {    echo "unload";}uninstall () {    echo "uninstall";}install () {    echo "install";}load () {    echo "load";}setup () {    read xcase $x inunload)    unload;;load)    load;;uninstall)    uninstall;;install)    install;; *)    echo "valid responses are load unload install uninstall"    setup ;;esac }setup