mainprog

Unix Shell编程权威指南的配套源代码,书是好书,不过习题没有答案,要自己做了

#!/bin/bash
# Scriptname: mainprog
# This is the main script that will call the function, addon

# datafile=$HOME/bourne/datafile 
datafile=./datafile 
source dbfunctions   	# The file is loaded into memory 
if [ ! -e $datafile ] 
then
	echo "$(basename $datafile) does not exist" >&2
	exit 1
fi

echo "Select one: " 
	cat <<EOF
		[1] Add info
		[2] Delete info 
		[3] Update info
		[4] Exit 
	EOF
	read choice 
	case $choice in
		1)	addon       # Calling the addon function
				;; 
		2)	delete      # Calling the delete function
				;;
		3)	update 
				;;
		4) 
			echo Bye 
			exit 0
				;; 
		*)	echo Bad choice
			exit 2
				;;
	esac
	echo Returned from function call 
	echo The name is $name     
	# Variable set in the function are known in this shell. 
done