Shell Script to Manage Environment Configuration at login

ShellEnv

#! /bin/ksh

export ENV_FILE_LOC=/home/kunalkumar/env

prepareMenu(){
        unset fileName
        unset menuString
        set -a fileName
        set -a menuString
        index=0;
        for file in `ls $ENV_FILE_LOC`
        do
                string=`grep "DISPLAY_MENU_STRING" $ENV_FILE_LOC/$file | awk -F"=" '{ print $2 }'`
                if [[ $string != "" ]]; then
                        fileName[index]=$file;
                        menuString[index]=$string;
                        index=`expr $index + 1 `;
                fi
        done
}

displayMenu(){
        echo "Available Shell Configuration. ";
        index=1;
        totalMenuItem=${#fileName[*]};
        while [[ $index < $totalMenuItem ]]; do
                echo "$index  - ${menuString[$index]}";
                index=`expr $index + 1`
        done;
        echo "Please select configuration : ";
}

readValues(){
        read inputOptions;
}

executeOptions(){
        OLDIFS=$IFS;
        export IFS=" ";
        inputArray=$inputOptions;
        totalInputOptions=${#inputArray[*]};
        echo "Sourcing Default Environment...";
        . $ENV_FILE_LOC/1_Default
        if [[ $totalInputOptions -eq 0 ]]; then
                echo "No option selected!";
                return;
        fi

        index=0;
        while [[ $index < $totalInputOptions ]]; do
                echo "Sourcing environment from ${fileName[ ${inputArray[$index]} ]}";
                . $ENV_FILE_LOC/${fileName[${inputArray[$index]}]};
                index=`expr $index + 1`;
        done
        export IFS=$OLDIFS
}

prepareMenu

displayMenu

readValues

executeOptions