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Useful Scripts

Prevent Idle Shutdown

This script uses the kodi-send tool to prevent Kodi from shutting down if there are active SSH, SAMBA, or NFS connections. The script checks every 60 seconds, and if at least one connection exists the command InhibitIdleShutdown(true) is sent to Kodi.

Create /storage/.config/prevent_idle.sh with the following content:

#!/bin/sh

IDLE_SHUTDOWN_ALLOWED_LAST_STATE=-1

while true
do
  KODI_RUNNING=`ps -A | grep kodi.bin | grep -v grep | wc -l`
  if [ 1 == $KODI_RUNNING ] ; then
    SSH_ACTIVE=`netstat -tnpa | grep 'tcp.*:22.*ESTABLISHED.*' | wc -l`
    NFS_ACTIVE=`netstat -tnpa | grep 'tcp.*:111.*ESTABLISHED.*' | wc -l`
    SMB_ACTIVE=`netstat -tnpa | grep 'tcp.*:445.*ESTABLISHED.*' | wc -l`  
    [ $SSH_ACTIVE -gt 0 -o $NFS_ACTIVE -gt 0 -o $SMB_ACTIVE -gt 0 ] && IDLE_SHUTDOWN_ALLOWED=1 || IDLE_SHUTDOWN_ALLOWED=0 
      if [ $IDLE_SHUTDOWN_ALLOWED_LAST_STATE != $IDLE_SHUTDOWN_ALLOWED ] ; then
        IDLE_SHUTDOWN_ALLOWED_LAST_STATE=$IDLE_SHUTDOWN_ALLOWED
        kodi-send --action="AllowIdleShutdown"
        if [ 0 == $IDLE_SHUTDOWN_ALLOWED ] ; then
          kodi-send --action="InhibitIdleShutdown(false)"
        else
          kodi-send --action="InhibitIdleShutdown(true)"
        fi
      fi
  fi
  sleep 60
done

Call the script from /storage/.config/autostart.sh so it runs as a background task. It will continue to monitor the state of connections until the device is halted.

(
/usr/bin/bash /storage/.config/prevent_idle.sh
)&

DYNU IP Updater

This script identifies your public IP address and updates a https://dynu.com Dynamic DNS record.

Create /storage/.config/dynu_update.sh with the following content:

#!/bin/sh

DYNU_USERNAME="username"
DYNU_PASSWORD="password-hash"
DYNU_HOSTNAME="example.dynu.com"
REFRESH_RATE=60

PUBLIC_IP=0.0.0.0

test_ip ()
{
  if [ -n $2 ] ; then
    if [ $1 != $2 ] ; then
      update_ip $2
      echo $2
    else 
      echo $1
    fi
  fi
}

update_ip ()
{
  DYNU_WGET="https://api.dynu.com/nic/update?hostname=$DYNU_HOSTNAME&myip=$1&username=$DYNU_USERNAME&password=$DYNU_PASSWORD"
  DYNU_UPDATE=`wget $DYNU_WGET -O - -q ; echo`
  (>&2 echo "$DYNU_UPDATE")
}

while true; do
  PUBLIC_IP_TEST=`wget http://ipecho.net/plain -O - -q ; echo`
  echo $PUBLIC_IP - $PUBLIC_IP_TEST
  PUBLIC_IP="$(test_ip $PUBLIC_IP $PUBLIC_IP_TEST)"
  sleep $(REFRESH_RATE)
  PUBLIC_IP_TEST=`curl -s checkip.dyndns.org | sed 's#.*Address: \(.*\)</b.*#\1#'`
  echo $PUBLIC_IP - $PUBLIC_IP_TEST
  sleep $(REFRESH_RATE)
  PUBLIC_IP_TEST=`curl -s ifconfig.co`
  echo $PUBLIC_IP - $PUBLIC_IP_TEST
  PUBLIC_IP="$(test_ip $PUBLIC_IP $PUBLIC_IP_TEST)"
  sleep $(REFRESH_RATE)
done

Call the script from /storage/.config/autostart.sh so it runs as a background task. It will continue to monitor the state of connections until the device is halted.

(
/usr/bin/bash /storage/.config/dynu_update.sh
)&

Note: If you set the refresh rate under 60 seconds the checkip.dyndns.org server will probably block your requests causing the script to fail.