Pastebin Bootstrap Script

#!/bin/bash

# LICENSE: SEE http://forum.kerbalspaceprogram.com/threads/92665-DMP-Linux-Server-Tools


# ---------------------------------------------------------------------------------------------------------
# PACKAGE
# ---------------------------------------------------------------------------------------------------------

# System Users
# SysUser[0]="dmpserver"

# Dirs
#         Target;chmodkey
# NewDir[0]="/usr/share/dmpserver;755"

# Pastebin Targets
#         Target;Key;Directory;chmodkey  (Dir Must Exist)
# Target[0]="dmpserver;X4E46Af5;/usr/bin;755"

# Dependencies
# Depends[0]="screen"


# Disclaimer
Disclaimer="
This will be displayed line-by-line before installing the scripts. It will then ask the user
yes or no."

# Post-Installation Script
function postInstall(){
    echo "This function will be called after the above has been accomplished."
}




# ---------------------------------------------------------------------------------------------------------
# INSTALLER
# ---------------------------------------------------------------------------------------------------------


# Variables
PASTEBIN_API="http://pastebin.com/raw.php?i="
ifsNewline=$'\n'
ifsReset=$IFS


# Functions
function linDistCheck(){
    if hash rpm 2> /dev/null ; then
        D_CHECK="rhel"
    elif hash dpkg 2> /dev/null ; then
        D_CHECK="debian"
    else
        echo "You are (probably) not running a Debian or RHEL based system!"
        echo "Your linux version is (probably) not supported."
        exit 1
    fi

}
function printDisclaimer(){
    IFS=$ifsNewline
    for line in $Disclaimer ; do
        echo $line
    done
    IFS=$ifsReset
}

function dependencyCheck(){
    for dependency in ${Depends[@]} ; do
        if hash $dependency 2> /dev/null ; then
            :
        else
            echo "This program requires '$dependency' to be available."
            echo "Please install it (try 'apt-get install $dependency' on Debian, or 'yum install $dependency' on RHEL) before continuing."
            exit 1
        fi
    done
}

function addSysUserList(){
    for user in ${SysUser[@]} ; do
        echo "Adding system user '$user'..."
        if id -u $user >/dev/null 2> /dev/null;
        then
            echo "User '$user' already exists! Skipping creation."
        else
            case "$D_CHECK" in
                "rhel")
                    useradd -r $user
                    usermod -s /bin/false $user
                    ;;

                "debian")
                    adduser -system $user
                    ;;

                *) echo "Distro Not Supported."  ;;
            esac
            echo "Added system user '$user'."
        fi
    done
}

function installDirList(){
    for src in ${NewDir[@]} ; do
        tdir=$(echo -n "$src" | awk -F ";" '{print $1}')
        tcode=$(echo -n "$src" | awk -F ";" '{print $2}')
        echo "Adding directory '$tdir'..."
        if [ ! -d $tdir ];
        then
            mkdir $tdir
            chmod $tcode $tdir
            echo "Added directory '$tdir' with chmod code '$tcode'."
        else
            echo -e "Directory '$tdir' already exists! Skipping creation."
        fi
    done
}

function getPBinScript(){
    echo "Installing '$2'. File will be downloaded from ${PASTEBIN_API}$1"
    curl --progress-bar ${PASTEBIN_API}$1 | tr -d '\r' > $2
    echo "Installed '$2'."
}

function installPBinList(){
    t=0
    for src in ${Target[@]} ; do
        tname=$(echo -n "$src" | awk -F ";" '{print $1}')
        tkey=$(echo -n "$src" | awk -F ";" '{print $2}')
        tdir=$(echo -n "$src" | awk -F ";" '{print $3}')
        tcode=$(echo -n "$src" | awk -F ";" '{print $4}')

        if [ ! -d $tdir ];
        then
            echo -e "FATAL: Directory '$tdir' does not exist! Skipping file '$tdir'."
        else
            getPBinScript $tkey $tdir/$tname
            chmod $tcode $tdir/$tname
        fi
        ((t++))
    done
}




# ---------------------------------------------------------------------------------------------------------
# EXECUTION
# ---------------------------------------------------------------------------------------------------------


if [ $(whoami) != 'root' ]; then
        echo "This program must be run with root permissions."
        exit 1
fi

printDisclaimer


echo -n "Do you understand and agree to the terms above? [y/n]: "
read answer
case $answer in
    [Yy]*)
        linDistCheck
        dependencyCheck
        addSysUserList
        installDirList
        installPBinList
        postInstall
        exit
        ;;

    [Nn]*) exit;;

    *) echo "Answer must be y or n.";;
esac