Engine-X script for multi-streaming

#!/bin/bash

# Ubu's Engine-X Script
set -x
# set -x should cause the script to run verbosely.  May be useful for tracking
# down bugs, but can also be commented out for cleaner output.

# The following variables define the file locations.  Change them however you
# wish, though you might not want to change the NGINX variable.

PODCAST=/etc/nginx/podcast.conf
GAMESTREAM=/etc/nginx/game.conf

# And here's the meat and potatoes.  This symlinks the desired profile, starts
# the server, waits for you to press enter (which you would do after a stream),
# and then kills the server, and deletes the symlink.  This causes nginx to fail
# to launch on it's own, so no streaming can be done with the wrong profile.

get_root()
    # Elevates script to root privilges, as many of the functions
    # require such.  This function was lifted from the Crashplan
    # installer script for Linux.

    # To do: How is the recall managed?  Check the source script.
    # May not be needed if script is run separately, as opposed to
    # as a function in a larger script.

    ( if [ "${USERNAME}" != "root" ]
        then
            echo "\n\t This script must be run as root."
            echo -n "\n\t Would you like to switch users and run as\
            root? (y/n) [y] "
            read YN
            if [ "x${YN}" == "x" ]
                then
                    YN=y
            fi

            if [ "${YN}" == "y" ]
                then
                    echo "  switching to root"
                    sudo ${0} recall
                    exit 0
                else
                    echo "\n\t Cannot continue, exiting..."
                    exit 1
                fi
        else
            echo "\n\t detected root permissions"
        fi )

main_func()
  ( echo " Engine-X should now be running, executing ps aux|grep nginx to confirm:"
    ps aux|grep nginx
    echo "\n\n Press Enter at any time to kill the nginx process"
    read enterKey
    /usr/local/nginx/sbin/nginx -s stop
    echo "\n\n Verifying that nginx is stopped, output should be empty"
    ps aux|grep nginx
    echo "\n End of output."
  )
get_root
if [ $1 = podcast ]
  then
    /usr/local/nginx/sbin/nginx -c $PODCAST
    main_func
  else
    /usr/local/nginx/sbin/nginx -c $GAMESTREAM
    main_func
fi