/etc/init.d/gnump3d :

#!/bin/bash

gmconfig="/etc/gnump3d/gnump3d.conf"
gmport="54321"
gmpidfile="/var/run/gnump3d_$gmport.pid"

case "$1" in
start)
  if [ -f $gmpidfile ] ; then
    echo "GNUmp3d already running on port $gmport"
  else
    echo "Starting GNUmp3d."
    /usr/bin/gnump3d --background -config $gmconfig --port $gmport
    sleep 1
    ps -ef | grep -v "grep" | grep "config $gmconfig" | cut -c10-15 > $gmpidfile
  fi
;;
stop)
  if [ -f $gmpidfile ] ; then
    echo "Shutting down GNUmp3d."
    /bin/kill -9 $(cat $gmpidfile)
    rm $gmpidfile
  else
    echo "GNUmp3d isn't running on port $gmport yet"
  fi

;;
restart)
  $0 stop
  $0 start
;;
status)
  if [ -f $gmpidfile ] ; then
    echo "GNUmp3d running on port $gmport with config $gmconfig and pid $(cat $gmpidfile)"
    echo $(ps -ef | grep -v "grep" | grep "config $gmconfig")
    #echo
    # code to display the other instance of gnump3d here...
  else
    echo "GNUmp3d isn't running yet"
  fi
;;
*)
  echo "Usage: $0 {start|stop|restart|status}"
  exit 1
esac

exit 0

To run more than one copy of gnump3d with this simply make a copy of this script and call it something like gnump3d_2.

sudo cp -vip /etc/init.d/gnump3d /etc/init.d/gnump3d_2

Then change the new init.d script to point to your new config and port (pid file auto updates by port #).

gmconfig="/etc/gnump3d/gnump3d_2.conf"
gmport="54322"

Make a copy of the stock gnump3d config and modify the necessary lines.

sudo cp -vip /etc/gnump3d/gnump3d.conf /etc/gnump3d/gnump3d_2.conf

In my config I modified these lines:

port = 54322
root = /home/gnump3d_2
user = gnump3d_2
logfile = /var/log/gnump3d/access_2.log
errorlog = /var/log/gnump3d/error_2.log
now_playing_path = /var/cache/gnump3d_2/serving
tag_cache = /var/cache/gnump3d_2/song.tags

And lastly we’ll need to make the cache drectories:

mkdir /var/cache/gnump3d_2/
mkdir /var/cache/gnump3d_2/serving
chmod -R 777 /var/cache/gnump3d_2
touch /var/cache/gnump3d_2/song.tags

And then you’re set to startup the second gnump3d instance.

/etc/init.d/gnump3d_2 start