8.1. 显示用户消息

michel ~/test> cat penguin.sh
#!/bin/bash

# This script lets you present different menus to Tux.  He will only be happy
# when given a fish.  To make it more fun, we added a couple more animals.

if [ "$menu" == "fish" ]; then
  if [ "$animal" == "penguin" ]; then
    echo -e "Hmmmmmm fish... Tux happy!\n"
  elif [ "$animal" == "dolphin" ]; then
    echo -e "\a\a\aPweetpeettreetppeterdepweet!\a\a\a\n"
  else
    echo -e "*prrrrrrrt*\n"
  fi
else
  if [ "$animal" == "penguin" ]; then
    echo -e "Tux don't like that.  Tux wants fish!\n"
    exit 1
  elif [ "$animal" == "dolphin" ]; then
    echo -e "\a\a\a\a\a\aPweepwishpeeterdepweet!\a\a\a"
    exit 2
  else
    echo -e "Will you read this sign?!  Don't feed the "$animal"s!\n"
    exit 3
  fi
fi

michel ~/test> cat feed.sh
#!/bin/bash
# This script acts upon the exit status given by penguin.sh

if [ "$#" != "2" ]; then
  echo -e "Usage of the feed script:\t$0 food-on-menu animal-name\n"
  exit 1
else

  export menu="$1"
  export animal="$2"

  echo -e "Feeding $menu to $animal...\n"

  feed="/nethome/anny/testdir/penguin.sh"

  $feed $menu $animal

result="$?"

  echo -e "Done feeding.\n"

case "$result" in

  1)
    echo -e "Guard: \"You'd better give'm a fish, less they get violent...\"\n"
    ;;
  2)
    echo -e "Guard: \"No wonder they flee our planet...\"\n"
    ;;
  3)
    echo -e "Guard: \"Buy the food that the Zoo provides at the entry, you ***\"\n"
    echo -e "Guard: \"You want to poison them, do you?\"\n"
    ;;
  *)
    echo -e "Guard: \"Don't forget the guide!\"\n"
    ;;
  esac

fi

echo "Leaving..."
echo -e "\a\a\aThanks for visiting the Zoo, hope to see you again soon!\n"

michel ~/test> feed.sh apple camel
Feeding apple to camel...

Will you read this sign?!  Don't feed the camels!

Done feeding.

Guard: "Buy the food that the Zoo provides at the entry, you ***"

Guard: "You want to poison them, do you?"

Leaving...
Thanks for visiting the Zoo, hope to see you again soon!

michel ~/test> feed.sh apple
Usage of the feed script:       ./feed.sh food-on-menu animal-name