Bash-Beginners-Guide

Bash Guide for Beginners
bit better:
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"
Chapter 8. Writing interactive scripts 95