Application of functions in shell _linux shell

To turn the "functions in" chapter into a "library for", "scripts, extract all the functions and Concatenat e them into one of the big file. If We call this file library.sh, a test script so accesses all of the functions might look like this:

#!/bin/sh

# Library test script
. library.sh
initializeansi

Echon "" A, do you have echo in your pat H? (1=yes, 2=no) "
read answer while
! Validint $answer 1 2; Do
 Echon "${boldon}try Again${boldoff}. Do your have echo "
 Echon" in your path? (1=yes, 2=no) "
 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 for you to might is a leap year:" Read the Year while

! Validint $year 1 9999; Do
 Echon ' Please enter a year in the ${boldon}correct${boldoff} format: '
 read year
did

if Isleapyea R $year; Then
 echo "${greenf}you ' re right! $year is a leap year.${reset} "
else
 echo" ${redf}nope, that's not a leap year.${reset} "
fi

exit 0

Application function, we can reuse our script.

It's worth noting that $. Tinyscript.sh is executing the script under the current shell without the "." or source

The script is executed under the sub shell, and there may be different occurrences, which are noteworthy.