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codecaine · 01-14-2010, 08:26 AM

getopts is use pretty much the same in c c++ python fpc and bash. It enables a user to deal with arguments. Here is a example script.

Code:

#!/bin/bash

while getopts "abcn:" option; do

case "$option" in

    a)

        echo 'alpha';;

    b)

        echo 'bravo';;

    c)

        echo 'charlie';;

    n)

        echo "$OPTARG";;

esac

done

abcn is all arguments in getopts. You can choose any characters you want. If you have a : after a letter it means that arguments must have input. Here is a example of runing the script. The script name is getoptsExamp

./getoptsExamp -abc
output:
alpha
bravo
charlie

./getoptsExamp -a -b -c
output:
alpha
bravo
charlie

./getoptsExamp -b -n codecaine
output:
bravo
codecaine

if you don't put in a argument after the -n it will display
/getoptExamp: option requires an argument -- n

***drdebcol*** · 01-14-2010, 08:21 PM

Very good and interesting !