Configurable /home/pi/lcv_startall.sh for Jamulus client on Raspberry Pi

lcv_startall.sh

#!/bin/bash

# Log last invocation to file for debugging
LOGFILE=/home/pi/lcv_startall.log
exec > ${LOGFILE} 2>&1

# This value can be overridden by the LCV config file
JAMULUS_SERVER_DEFAULT="your_jamulus_server_hostname_or_ip_address"
JACKD_FRAMES_PER_PERIOD_DEFAULT=128

# If LCV config file exists, read the variables there
LCV_CONFIG=/boot/lcv_config.txt
JAMULUS_INI=/home/pi/.config/Jamulus/Jamulus.ini

if [ -f ${LCV_CONFIG} ]; then
  source ${LCV_CONFIG}
  if [ ! -f ${JAMULUS_INI} ] || [ ${LCV_CONFIG} -nt ${JAMULUS_INI} ]; then
    echo "*** Reading LCV config file found at ${LCV_CONFIG}"

    # Base64 encode the name and city
    export JAMULUS_NAME_BASE64=$(echo -n "${JAMULUS_NAME}" | /usr/bin/base64)
    export JAMULUS_CITY_BASE64=$(echo -n "${JAMULUS_CITY}" | /usr/bin/base64)

    echo "*** Writing new Jamulus.ini"
    /usr/bin/envsubst < /home/pi/Jamulus.ini.template > ${JAMULUS_INI}
  fi
else
  # LCV config file cannot be read
  echo "*** No LCV config file found at ${LCV_CONFIG}"
  JAMULUS_SERVER=${JAMULUS_SERVER_DEFAULT}
  JACKD_FRAMES_PER_PERIOD=${JACKD_FRAMES_PER_PERIOD_DEFAULT}
fi

JACKD_CMD="/usr/bin/jackd -R -dalsa -dhw:1 -r48000 -p${JACKD_FRAMES_PER_PERIOD} -n2"
JAMULUS_CMD="Jamulus -c ${JAMULUS_SERVER}"

# Start jackd if it is not already running
if ps -ef |grep "[ ]/usr/bin/jackd" >/dev/null; then
  echo "*** jackd already running - not attempting to start"
else
  echo "*** Starting jackd: ${JACKD_CMD}"
  ${JACKD_CMD} &
  if [ $? != 0 ]; then
    echo "*** Failed to start jackd - exiting"
    exit 1
  fi
  # Give everything a chance to settle
  sleep 5
fi 

# Start Jamulus if it is not already running
if ps -ef |grep "[J]amulus" >/dev/null; then
  echo "*** Jamulus already running - not attempting to start"
else
  echo "*** Starting Jamulus: ${JAMULUS_CMD}"
  ${JAMULUS_CMD} &
  if [ $? == 0 ]; then
    echo "*** Successfully started Jamulus"
  else
    echo "*** Jamulus failed to start"
    exit 2
  fi
fi