DMPServer Linux Command Pipe

#!/bin/bash

# Config
. /etc/dmpserver/dmpserver.cfg

# Lib
. /var/lib/dmpserver/dmpbashlib

# IFS Vars
ifsNewline=$'\n'
ifsReset=$IFS


# Check for root
rootCheck


cd $DMPDIR

function DMPPipe(){
    su $user -s $shell <<EOF
    if screen -list | grep -q $1 ; then screen -p 0 -S $1 -X stuff "/$2"$'\n' ; fi
EOF
}

function sayShutdownMessage(){
    IFS=$ifsNewline
    for line in $shutdownMsg ; do
        DMPPipe "say $line"
        sleep 1
    done
    IFS=$ifsReset
}

case "$2" in
    -m|-s|-message|-say)
        DMPPipe $1 "say $3"
        ;;

    shutdown)
        sayShutdownMessage
        case "$3" in
            -f) :  ;;
            *) sleep $shutdown_count  ;;
        esac
        DMPPipe $1 shutdown
        ;;

    restart)
        sayShutdownMessage
        case "$3" in
            -f) :  ;;
            *) sleep $shutdown_count  ;;
        esac
        DMPPipe $1 restart
        ;;

    *)
        DMPPipe $1 "$2"
        ;;

esac
exit 1