To turn the functions in this chapter into a library for use in other scripts, extract all the functions and concatenate them into one big file. If we call this file library.sh, a test script that accesses all of the functions might look like this:

#!/bin/sh # Library test script . library.sh initializeANSI echon "First off, do you have echo in your path" read answer while ! validint $answer 1 2 ; do echon "${boldon}Try again${boldoff}. Do you have echo " echon "in your path" read answer done if ! checkForCmdInPath "echo" ; then echo "Nope, can't find the echo command." else echo "The echo command is in the PATH." fi echo "" echon "Enter a year you think might be a leap year: " read year while ! validint $year 1 9999 ; do echon "Please enter a year in the ${boldon}correct${boldoff} format: " read year done if isLeapYear $year ; then echo "${greenf}You're right! $year was a leap year.${reset}" else echo "${redf}Nope, that's not a leap year.${reset}" fi exit 0

应用函数，我们就可以复用我们的脚本。

值得注意的是 $ . tinyscript.sh ，就是在当前shell下执行脚本，不加"."或source

则会在子shell下执行脚本，可能会有不同的情况发生，值得注意。